HONEYCOMB-10: jVpp - the new java API. Java code generation

The old japi has two main drawbacks:

* it is not fully generated (requres manual coding for
every new api call that returns data other thanstatus code)

* it is not asynchronous from Java perspective (requires
active wait loops - big overhead due to JNI boundary being
crossed lots of times).

The new api is lightweight (fully generated except for connect,
disconenct and ping) and truly asynchronous (uses callbacks,
utilities that offer java.util.concurrent.Future interface
are also provided).

Change-Id: I531080ef651e8a74f19210490c71d161221ab600
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Signed-off-by: Ed Warnicke <eaw@cisco.com>

19 files changed, 1752 insertions, 0 deletions

diff --git a/vpp-api/java/jvpp/gen/callback_gen.py b/vpp-api/java/jvpp/gen/callback_gen.py
new file mode 100644
index 00000000..218ac622
--- /dev/null
+++ b/vpp-api/java/jvpp/gen/callback_gen.py
@@ -0,0 +1,89 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import util
+from string import Template
+
+from util import remove_suffix
+
+callback_suffix = "Callback"
+
+callback_template = Template("""
+package $base_package.$callback_package;
+
+/**
+ * $docs
+ */
+public interface $cls_name extends $base_package.$callback_package.JVppCallback {
+
+    $callback_method
+
+}
+""")
+
+global_callback_template = Template("""
+package $base_package.$callback_package;
+
+/**
+ *
+ *
+ * Global aggregated callback interface
+ */
+public interface JVppGlobalCallback extends $callbacks {
+}
+""")
+
+
+def generate_callbacks(func_list, base_package, callback_package, dto_package):
+    """ Generates callback interfaces """
+    print "Generating Callback interfaces"
+
+    if not os.path.exists(callback_package):
+        raise Exception("%s folder is missing" % callback_package)
+
+    callbacks = []
+    for func in func_list:
+
+        if util.is_notification(func['name']) or util.is_ignored(func['name']):
+            # FIXME handle notifications
+            continue
+
+        camel_case_name_with_suffix = util.underscore_to_camelcase_upper(func['name'])
+        if not util.is_reply(camel_case_name_with_suffix):
+            continue
+
+        camel_case_name = util.remove_reply_suffix(camel_case_name_with_suffix)
+        callbacks.append("{0}.{1}.{2}".format(base_package, callback_package, camel_case_name + callback_suffix))
+        callback_path = os.path.join(callback_package, camel_case_name + callback_suffix + ".java")
+        callback_file = open(callback_path, 'w')
+
+        reply_type = "%s.%s.%s" % (base_package, dto_package, camel_case_name_with_suffix)
+        method = "void on{0}({1} reply);".format(camel_case_name_with_suffix, reply_type)
+        callback_file.write(
+            callback_template.substitute(docs='Generated from ' + str(func),
+                                         cls_name=camel_case_name + callback_suffix,
+                                         callback_method=method,
+                                         base_package=base_package,
+                                         callback_package=callback_package))
+        callback_file.flush()
+        callback_file.close()
+
+    callback_file = open(os.path.join(callback_package, "JVppGlobalCallback.java"), 'w')
+    callback_file.write(global_callback_template.substitute(callbacks=", ".join(callbacks),
+                                                            base_package=base_package,
+                                                            callback_package=callback_package))
+    callback_file.flush()
+    callback_file.close()
diff --git a/vpp-api/java/jvpp/gen/dto_gen.py b/vpp-api/java/jvpp/gen/dto_gen.py
new file mode 100644
index 00000000..17fde68a
--- /dev/null
+++ b/vpp-api/java/jvpp/gen/dto_gen.py
@@ -0,0 +1,143 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os, util
+from string import Template
+
+dto_template = Template("""
+package $base_package.$dto_package;
+
+/**
+ * $docs
+ */
+public final class $cls_name implements $base_package.$dto_package.$base_type {
+
+$fields
+$methods
+}
+""")
+
+field_template = Template("""    public $type $name;\n""")
+
+send_template = Template("""    @Override
+    public int send(final $base_package.JVpp jvpp) {
+        return jvpp.$method_name($args);
+    }\n""")
+
+
+def generate_dtos(func_list, base_package, dto_package):
+    """ Generates dto objects in a dedicated package """
+    print "Generating DTOs"
+
+    if not os.path.exists(dto_package):
+        raise Exception("%s folder is missing" % dto_package)
+
+    for func in func_list:
+        camel_case_dto_name = util.underscore_to_camelcase_upper(func['name'])
+        camel_case_method_name = util.underscore_to_camelcase(func['name'])
+        dto_path = os.path.join(dto_package, camel_case_dto_name + ".java")
+
+        if util.is_notification(func['name']) or util.is_ignored(func['name']):
+            # TODO handle notifications
+            continue
+
+        fields = ""
+        for t in zip(func['types'], func['args']):
+            fields += field_template.substitute(type=util.jni_2_java_type_mapping[t[0]],
+                                                name=util.underscore_to_camelcase(t[1]))
+        methods = ""
+        base_type = ""
+        if util.is_reply(camel_case_dto_name):
+            request_dto_name = get_request_name(camel_case_dto_name, func['name'])
+            if util.is_details(camel_case_dto_name):
+                # FIXME assumption that dump calls end with "Dump" suffix. Not enforced in vpe.api
+                base_type += "JVppReply<%s.%s.%s>" % (base_package, dto_package, request_dto_name + "Dump")
+                generate_dump_reply_dto(request_dto_name, base_package, dto_package, camel_case_dto_name,
+                                        camel_case_method_name, func)
+            else:
+                base_type += "JVppReply<%s.%s.%s>" % (base_package, dto_package, request_dto_name)
+        else:
+            args = "" if fields is "" else "this"
+            methods = send_template.substitute(method_name=camel_case_method_name,
+                                               base_package=base_package,
+                                               args=args)
+            if util.is_dump(camel_case_dto_name):
+                base_type += "JVppDump"
+            else:
+                base_type += "JVppRequest"
+
+        dto_file = open(dto_path, 'w')
+        dto_file.write(dto_template.substitute(docs='Generated from ' + str(func),
+                                               cls_name=camel_case_dto_name,
+                                               fields=fields,
+                                               methods=methods,
+                                               base_package=base_package,
+                                               base_type=base_type,
+                                               dto_package=dto_package))
+        dto_file.flush()
+        dto_file.close()
+
+    flush_dump_reply_dtos()
+
+
+dump_dto_suffix = "ReplyDump"
+dump_reply_artificial_dtos = {}
+
+
+# Returns request name or special one from unconventional_naming_rep_req map
+def get_request_name(camel_case_dto_name, func_name):
+    return util.underscore_to_camelcase_upper(
+        util.unconventional_naming_rep_req[func_name]) if func_name in util.unconventional_naming_rep_req \
+        else util.remove_reply_suffix(camel_case_dto_name)
+
+
+def flush_dump_reply_dtos():
+    for dump_reply_artificial_dto in dump_reply_artificial_dtos.values():
+        dto_path = os.path.join(dump_reply_artificial_dto['dto_package'],
+                                dump_reply_artificial_dto['cls_name'] + ".java")
+        dto_file = open(dto_path, 'w')
+        dto_file.write(dto_template.substitute(docs=dump_reply_artificial_dto['docs'],
+                                               cls_name=dump_reply_artificial_dto['cls_name'],
+                                               fields=dump_reply_artificial_dto['fields'],
+                                               methods=dump_reply_artificial_dto['methods'],
+                                               base_package=dump_reply_artificial_dto['base_package'],
+                                               base_type=dump_reply_artificial_dto['base_type'],
+                                               dto_package=dump_reply_artificial_dto['dto_package']))
+        dto_file.flush()
+        dto_file.close()
+
+
+def generate_dump_reply_dto(request_dto_name, base_package, dto_package, camel_case_dto_name, camel_case_method_name,
+                            func):
+    base_type = "JVppReplyDump<%s.%s.%s, %s.%s.%s>" % (
+        base_package, dto_package, util.remove_reply_suffix(camel_case_dto_name) + "Dump",
+        base_package, dto_package, camel_case_dto_name)
+    fields = "    public java.util.List<%s> %s = new java.util.ArrayList<>();" % (camel_case_dto_name, camel_case_method_name)
+    cls_name = camel_case_dto_name + dump_dto_suffix
+
+    # In case of already existing artificial reply dump DTO, just update it
+    # Used for sub-dump dtos
+    if request_dto_name in dump_reply_artificial_dtos.keys():
+        dump_reply_artificial_dtos[request_dto_name]['fields'] = \
+            dump_reply_artificial_dtos[request_dto_name]['fields'] + '\n' + fields
+    else:
+        dump_reply_artificial_dtos[request_dto_name] = ({'docs': 'Dump reply wrapper generated from ' + str(func),
+                                                         'cls_name': cls_name,
+                                                         'fields': fields,
+                                                         'methods': "",
+                                                         'base_package': base_package,
+                                                         'base_type': base_type,
+                                                         'dto_package': dto_package,
+                                                         })
diff --git a/vpp-api/java/jvpp/gen/jvpp_callback_facade_gen.py b/vpp-api/java/jvpp/gen/jvpp_callback_facade_gen.py
new file mode 100644
index 00000000..731bd894
--- /dev/null
+++ b/vpp-api/java/jvpp/gen/jvpp_callback_facade_gen.py
@@ -0,0 +1,236 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os, util
+from string import Template
+
+import callback_gen
+import dto_gen
+
+jvpp_ifc_template = Template("""
+package $base_package.$callback_facade_package;
+
+public interface CallbackJVpp extends java.lang.AutoCloseable {
+
+    @Override
+    void close();
+
+    // TODO add send
+
+$methods
+}
+""")
+
+jvpp_impl_template = Template("""
+package $base_package.$callback_facade_package;
+
+public final class CallbackJVppFacade implements $base_package.$callback_facade_package.CallbackJVpp {
+
+    private final $base_package.JVpp jvpp;
+    private final java.util.Map<Integer, $base_package.$callback_package.JVppCallback> callbacks;
+
+    public CallbackJVppFacade(final $base_package.JVpp jvpp,
+                              java.util.Map<Integer, $base_package.$callback_package.JVppCallback> callbacks) {
+        if(jvpp == null) {
+            throw new java.lang.NullPointerException("jvpp is null");
+        }
+        this.jvpp = jvpp;
+        this.callbacks = callbacks;
+    }
+
+    @Override
+    public void close() {
+    }
+
+    // TODO add send()
+
+$methods
+}
+""")
+
+method_template = Template(
+    """    void $name($base_package.$dto_package.$request request, $base_package.$callback_package.$callback callback);""")
+method_impl_template = Template("""    public final void $name($base_package.$dto_package.$request request, $base_package.$callback_package.$callback callback) {
+        synchronized (callbacks) {
+            callbacks.put(jvpp.$name(request), callback);
+        }
+    }
+""")
+
+no_arg_method_template = Template("""    void $name($base_package.$callback_package.$callback callback);""")
+no_arg_method_impl_template = Template("""    public final void $name($base_package.$callback_package.$callback callback) {
+        synchronized (callbacks) {
+            callbacks.put(jvpp.$name(), callback);
+        }
+    }
+""")
+
+
+def generate_jvpp(func_list, base_package, dto_package, callback_package, callback_facade_package):
+    """ Generates callback facade """
+    print "Generating JVpp callback facade"
+
+    if os.path.exists(callback_facade_package):
+        util.remove_folder(callback_facade_package)
+
+    os.mkdir(callback_facade_package)
+
+    methods = []
+    methods_impl = []
+    for func in func_list:
+
+        if util.is_notification(func['name']) or util.is_ignored(func['name']):
+            # TODO handle notifications
+            continue
+
+        camel_case_name = util.underscore_to_camelcase(func['name'])
+        camel_case_name_upper = util.underscore_to_camelcase_upper(func['name'])
+        if util.is_reply(camel_case_name):
+            continue
+
+        # Strip suffix for dump calls
+        callback_type = get_request_name(camel_case_name_upper, func['name']) + callback_gen.callback_suffix
+
+        if len(func['args']) == 0:
+            methods.append(no_arg_method_template.substitute(name=camel_case_name,
+                                                             base_package=base_package,
+                                                             dto_package=dto_package,
+                                                             callback_package=callback_package,
+                                                             callback=callback_type))
+            methods_impl.append(no_arg_method_impl_template.substitute(name=camel_case_name,
+                                                                       base_package=base_package,
+                                                                       dto_package=dto_package,
+                                                                       callback_package=callback_package,
+                                                                       callback=callback_type))
+        else:
+            methods.append(method_template.substitute(name=camel_case_name,
+                                                      request=camel_case_name_upper,
+                                                      base_package=base_package,
+                                                      dto_package=dto_package,
+                                                      callback_package=callback_package,
+                                                      callback=callback_type))
+            methods_impl.append(method_impl_template.substitute(name=camel_case_name,
+                                                                request=camel_case_name_upper,
+                                                                base_package=base_package,
+                                                                dto_package=dto_package,
+                                                                callback_package=callback_package,
+                                                                callback=callback_type))
+
+    join = os.path.join(callback_facade_package, "CallbackJVpp.java")
+    jvpp_file = open(join, 'w')
+    jvpp_file.write(
+        jvpp_ifc_template.substitute(methods="\n".join(methods),
+                                     base_package=base_package,
+                                     dto_package=dto_package,
+                                     callback_facade_package=callback_facade_package))
+    jvpp_file.flush()
+    jvpp_file.close()
+
+    jvpp_file = open(os.path.join(callback_facade_package, "CallbackJVppFacade.java"), 'w')
+    jvpp_file.write(jvpp_impl_template.substitute(methods="\n".join(methods_impl),
+                                                  base_package=base_package,
+                                                  dto_package=dto_package,
+                                                  callback_package=callback_package,
+                                                  callback_facade_package=callback_facade_package))
+    jvpp_file.flush()
+    jvpp_file.close()
+
+    generate_callback(func_list, base_package, dto_package, callback_package, callback_facade_package)
+
+
+jvpp_facade_callback_template = Template("""
+package $base_package.$callback_facade_package;
+
+/**
+ * Async facade callback setting values to future objects
+ */
+public final class CallbackJVppFacadeCallback implements $base_package.$callback_package.JVppGlobalCallback {
+
+    private final java.util.Map<Integer, $base_package.$callback_package.JVppCallback> requests;
+
+    public CallbackJVppFacadeCallback(final java.util.Map<Integer, $base_package.$callback_package.JVppCallback> requestMap) {
+        this.requests = requestMap;
+    }
+
+$methods
+}
+""")
+
+jvpp_facade_callback_method_template = Template("""
+    @Override
+    @SuppressWarnings("unchecked")
+    public void on$callback_dto($base_package.$dto_package.$callback_dto reply) {
+
+        $base_package.$callback_package.$callback callback;
+        synchronized(requests) {
+            callback = ($base_package.$callback_package.$callback) requests.remove(reply.context);
+        }
+
+        if(callback != null) {
+            callback.on$callback_dto(reply);
+        }
+    }
+""")
+
+
+def generate_callback(func_list, base_package, dto_package, callback_package, callback_facade_package):
+    callbacks = []
+    for func in func_list:
+
+        if util.is_notification(func['name']) or util.is_ignored(func['name']):
+            # TODO handle notifications
+            continue
+
+        camel_case_name_with_suffix = util.underscore_to_camelcase_upper(func['name'])
+        if not util.is_reply(camel_case_name_with_suffix):
+            continue
+
+        callbacks.append(jvpp_facade_callback_method_template.substitute(base_package=base_package,
+                                                                         dto_package=dto_package,
+                                                                         callback_package=callback_package,
+                                                                         callback=util.remove_reply_suffix(camel_case_name_with_suffix) + callback_gen.callback_suffix,
+                                                                         callback_dto=camel_case_name_with_suffix))
+
+    jvpp_file = open(os.path.join(callback_facade_package, "CallbackJVppFacadeCallback.java"), 'w')
+    jvpp_file.write(jvpp_facade_callback_template.substitute(base_package=base_package,
+                                                             dto_package=dto_package,
+                                                             callback_package=callback_package,
+                                                             methods="".join(callbacks),
+                                                             callback_facade_package=callback_facade_package))
+    jvpp_file.flush()
+    jvpp_file.close()
+
+
+# Returns request name or special one from unconventional_naming_rep_req map
+def get_request_name(camel_case_dto_name, func_name):
+    if func_name in reverse_dict(util.unconventional_naming_rep_req):
+        request_name = util.underscore_to_camelcase_upper(reverse_dict(util.unconventional_naming_rep_req)[func_name])
+    else:
+        request_name = camel_case_dto_name
+    return remove_suffix(request_name)
+
+
+def reverse_dict(map):
+    return dict((v, k) for k, v in map.iteritems())
+
+
+def remove_suffix(name):
+    if util.is_reply(name):
+        return util.remove_reply_suffix(name)
+    else:
+        if util.is_dump(name):
+            return util.remove_suffix(name, util.dump_suffix)
+        else:
+            return name
diff --git a/vpp-api/java/jvpp/gen/jvpp_future_facade_gen.py b/vpp-api/java/jvpp/gen/jvpp_future_facade_gen.py
new file mode 100644
index 00000000..2aae5b80
--- /dev/null
+++ b/vpp-api/java/jvpp/gen/jvpp_future_facade_gen.py
@@ -0,0 +1,184 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os, util
+from string import Template
+
+import dto_gen
+
+jvpp_facade_callback_template = Template("""
+package $base_package.$future_package;
+
+/**
+ * Async facade callback setting values to future objects
+ */
+public final class FutureJVppFacadeCallback implements $base_package.$callback_package.JVppGlobalCallback {
+
+    private final java.util.Map<java.lang.Integer, java.util.concurrent.CompletableFuture<? extends $base_package.$dto_package.JVppReply<?>>> requests;
+
+    public FutureJVppFacadeCallback(final java.util.Map<java.lang.Integer, java.util.concurrent.CompletableFuture<? extends $base_package.$dto_package.JVppReply<?>>> requestMap) {
+        this.requests = requestMap;
+    }
+
+$methods
+}
+""")
+
+jvpp_facade_callback_method_template = Template("""
+    @Override
+    @SuppressWarnings("unchecked")
+    public void on$callback_dto($base_package.$dto_package.$callback_dto reply) {
+        final java.util.concurrent.CompletableFuture<$base_package.$dto_package.JVppReply<?>> completableFuture;
+
+        synchronized(requests) {
+            completableFuture = (java.util.concurrent.CompletableFuture<$base_package.$dto_package.JVppReply<?>>) requests.get(reply.context);
+        }
+
+        if(completableFuture != null) {
+            if(reply.retval < 0) {
+                completableFuture.completeExceptionally(new Exception("Invocation of " + $base_package.$dto_package.$callback_dto.class
+                    + " failed with value " + reply.retval));
+            } else {
+                completableFuture.complete(reply);
+            }
+
+            synchronized(requests) {
+                requests.remove(reply.context);
+            }
+        }
+    }
+""")
+
+# TODO reuse common parts with generic method callback
+jvpp_facade_control_ping_method_template = Template("""
+    @Override
+    @SuppressWarnings("unchecked")
+    public void on$callback_dto($base_package.$dto_package.$callback_dto reply) {
+        final java.util.concurrent.CompletableFuture<$base_package.$dto_package.JVppReply<?>> completableFuture;
+
+        synchronized(requests) {
+            completableFuture = (java.util.concurrent.CompletableFuture<$base_package.$dto_package.JVppReply<?>>) requests.get(reply.context);
+        }
+
+        if(completableFuture != null) {
+            // Finish dump call
+            if (completableFuture instanceof $base_package.$future_package.FutureJVppFacade.CompletableDumpFuture) {
+                completableFuture.complete((($base_package.$future_package.FutureJVppFacade.CompletableDumpFuture) completableFuture).getReplyDump());
+                // Remove future mapped to dump call context id
+                synchronized(requests) {
+                    requests.remove((($base_package.$future_package.FutureJVppFacade.CompletableDumpFuture) completableFuture).getContextId());
+                }
+            } else {
+                if(reply.retval < 0) {
+                    completableFuture.completeExceptionally(new Exception("Invocation of " + $base_package.$dto_package.$callback_dto.class
+                        + " failed with value " + reply.retval));
+                } else {
+                    completableFuture.complete(reply);
+                }
+            }
+
+            synchronized(requests) {
+                requests.remove(reply.context);
+            }
+        }
+    }
+""")
+
+jvpp_facade_details_callback_method_template = Template("""
+    @Override
+    @SuppressWarnings("unchecked")
+    public void on$callback_dto($base_package.$dto_package.$callback_dto reply) {
+        final FutureJVppFacade.CompletableDumpFuture<$base_package.$dto_package.$callback_dto_reply_dump> completableFuture;
+
+        synchronized(requests) {
+            completableFuture = ($base_package.$future_package.FutureJVppFacade.CompletableDumpFuture<$base_package.$dto_package.$callback_dto_reply_dump>) requests.get(reply.context);
+        }
+
+        if(completableFuture != null) {
+            $base_package.$dto_package.$callback_dto_reply_dump replyDump = completableFuture.getReplyDump();
+            if(replyDump == null) {
+                replyDump = new $base_package.$dto_package.$callback_dto_reply_dump();
+                completableFuture.setReplyDump(replyDump);
+            }
+
+            replyDump.$callback_dto_field.add(reply);
+        }
+    }
+""")
+
+
+def generate_jvpp(func_list, base_package, dto_package, callback_package, future_facade_package):
+    """ Generates JVpp interface and JNI implementation """
+    print "Generating JVpp future facade"
+
+    if not os.path.exists(future_facade_package):
+        raise Exception("%s folder is missing" % future_facade_package)
+
+    callbacks = []
+    for func in func_list:
+
+        if util.is_notification(func['name']) or util.is_ignored(func['name']):
+            # TODO handle notifications
+            continue
+
+        camel_case_name_with_suffix = util.underscore_to_camelcase_upper(func['name'])
+        if not util.is_reply(camel_case_name_with_suffix):
+            continue
+
+        if util.is_details(camel_case_name_with_suffix):
+            camel_case_method_name = util.underscore_to_camelcase(func['name'])
+            camel_case_request_name = get_standard_dump_reply_name(util.underscore_to_camelcase_upper(func['name']),
+                                                                   func['name'])
+            callbacks.append(jvpp_facade_details_callback_method_template.substitute(base_package=base_package,
+                                                                                     dto_package=dto_package,
+                                                                                     callback_dto=camel_case_name_with_suffix,
+                                                                                     callback_dto_field=camel_case_method_name,
+                                                                                     callback_dto_reply_dump=camel_case_request_name + dto_gen.dump_dto_suffix,
+                                                                                     future_package=future_facade_package))
+        else:
+            if util.is_control_ping(camel_case_name_with_suffix):
+                callbacks.append(jvpp_facade_control_ping_method_template.substitute(base_package=base_package,
+                                                                                     dto_package=dto_package,
+                                                                                     callback_dto=camel_case_name_with_suffix,
+                                                                                     future_package=future_facade_package))
+            else:
+                callbacks.append(jvpp_facade_callback_method_template.substitute(base_package=base_package,
+                                                                                 dto_package=dto_package,
+                                                                                 callback_dto=camel_case_name_with_suffix))
+
+    jvpp_file = open(os.path.join(future_facade_package, "FutureJVppFacadeCallback.java"), 'w')
+    jvpp_file.write(jvpp_facade_callback_template.substitute(base_package=base_package,
+                                                             dto_package=dto_package,
+                                                             callback_package=callback_package,
+                                                             methods="".join(callbacks),
+                                                             future_package=future_facade_package))
+    jvpp_file.flush()
+    jvpp_file.close()
+
+
+# Returns request name or special one from unconventional_naming_rep_req map
+def get_standard_dump_reply_name(camel_case_dto_name, func_name):
+    # FIXME this is a hotfix for sub-details callbacks
+    # FIXME also for L2FibTableEntry
+    # It's all because unclear mapping between
+    #  request -> reply,
+    #  dump -> reply, details,
+    #  notification_start -> reply, notifications
+
+    # vpe.api needs to be "standardized" so we can parse the information and create maps before generating java code
+    suffix = func_name.split("_")[-1]
+    return util.underscore_to_camelcase_upper(
+        util.unconventional_naming_rep_req[func_name]) + util.underscore_to_camelcase_upper(suffix) if func_name in util.unconventional_naming_rep_req \
+        else camel_case_dto_name
diff --git a/vpp-api/java/jvpp/gen/jvpp_impl_gen.py b/vpp-api/java/jvpp/gen/jvpp_impl_gen.py
new file mode 100644
index 00000000..5446a694
--- /dev/null
+++ b/vpp-api/java/jvpp/gen/jvpp_impl_gen.py
@@ -0,0 +1,140 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os, util
+from string import Template
+
+jvpp_ifc_template = Template("""
+package $base_package;
+
+public interface JVpp extends java.lang.AutoCloseable {
+
+    /**
+     * Generic dispatch method for sending requests to VPP
+     */
+    int send($base_package.$dto_package.JVppRequest request);
+
+    @Override
+    void close();
+
+$methods
+}
+""")
+
+jvpp_impl_template = Template("""
+package $base_package;
+
+public final class JVppImpl implements $base_package.JVpp {
+
+    private final $base_package.VppConnection connection;
+
+    public JVppImpl(final $base_package.VppConnection connection) {
+        if(connection == null) {
+            throw new java.lang.NullPointerException("Connection is null");
+        }
+        this.connection = connection;
+    }
+
+    @Override
+    public void close() {
+        connection.close();
+    }
+
+    @Override
+    public int send($base_package.$dto_package.JVppRequest request) {
+        return request.send(this);
+    }
+
+$methods
+}
+""")
+
+method_template = Template("""    int $name($base_package.$dto_package.$request request);""")
+method_native_template = Template(
+    """    private static native int ${name}0($base_package.$dto_package.$request request);""")
+method_impl_template = Template("""    public final int $name($base_package.$dto_package.$request request) {
+        if(request == null) {
+            throw new java.lang.NullPointerException("Null request object");
+        }
+        connection.checkActive();
+        return ${name}0(request);
+    }
+""")
+
+no_arg_method_template = Template("""    int $name();""")
+no_arg_method_native_template = Template("""    private static native int ${name}0();""")
+no_arg_method_impl_template = Template("""    public final int $name() {
+        connection.checkActive();
+        return ${name}0();
+    }
+""")
+
+
+def generate_jvpp(func_list, base_package, dto_package):
+    """ Generates JVpp interface and JNI implementation """
+    print "Generating JVpp"
+
+    methods = []
+    methods_impl = []
+    for func in func_list:
+
+        if util.is_notification(func['name']) or util.is_ignored(func['name']):
+            # TODO handle notifications
+            continue
+
+        camel_case_name = util.underscore_to_camelcase(func['name'])
+        camel_case_name_upper = util.underscore_to_camelcase_upper(func['name'])
+        if util.is_reply(camel_case_name):
+            continue
+
+        if len(func['args']) == 0:
+            methods.append(no_arg_method_template.substitute(name=camel_case_name,
+                                                             base_package=base_package,
+                                                             dto_package=dto_package))
+            methods_impl.append(
+                no_arg_method_native_template.substitute(name=camel_case_name,
+                                                         base_package=base_package,
+                                                         dto_package=dto_package))
+            methods_impl.append(no_arg_method_impl_template.substitute(name=camel_case_name,
+                                                                       base_package=base_package,
+                                                                       dto_package=dto_package))
+        else:
+            methods.append(method_template.substitute(name=camel_case_name,
+                                                      request=camel_case_name_upper,
+                                                      base_package=base_package,
+                                                      dto_package=dto_package))
+            methods_impl.append(method_native_template.substitute(name=camel_case_name,
+                                                                  request=camel_case_name_upper,
+                                                                  base_package=base_package,
+                                                                  dto_package=dto_package))
+            methods_impl.append(method_impl_template.substitute(name=camel_case_name,
+                                                                request=camel_case_name_upper,
+                                                                base_package=base_package,
+                                                                dto_package=dto_package))
+
+    jvpp_file = open("JVpp.java", 'w')
+    jvpp_file.write(
+        jvpp_ifc_template.substitute(methods="\n".join(methods),
+                                     base_package=base_package,
+                                     dto_package=dto_package))
+    jvpp_file.flush()
+    jvpp_file.close()
+
+    jvpp_file = open("JVppImpl.java", 'w')
+    jvpp_file.write(jvpp_impl_template.substitute(methods="\n".join(methods_impl),
+                                                  base_package=base_package,
+                                                  dto_package=dto_package))
+    jvpp_file.flush()
+    jvpp_file.close()
diff --git a/vpp-api/java/jvpp/gen/util.py b/vpp-api/java/jvpp/gen/util.py
new file mode 100644
index 00000000..17dc2ed9
--- /dev/null
+++ b/vpp-api/java/jvpp/gen/util.py
@@ -0,0 +1,173 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+from os import removedirs
+
+
+def underscore_to_camelcase(name):
+    name = name.title().replace("_", "")
+    return name[0].lower() + name[1:]
+
+
+def underscore_to_camelcase_upper(name):
+    name = name.title().replace("_", "")
+    return name[0].upper() + name[1:]
+
+
+def remove_folder(folder):
+    """ Remove folder with all its files """
+    for root, dirs, files in os.walk(folder, topdown=False):
+        for name in files:
+            os.remove(os.path.join(root, name))
+        removedirs(folder)
+
+
+reply_suffixes = ("reply", "details", "l2fibtableentry")
+
+
+def is_reply(name):
+    return name.lower().endswith(reply_suffixes)
+
+
+def is_details(name):
+    return name.lower().endswith(reply_suffixes[1]) or name.lower().endswith(reply_suffixes[2])
+
+dump_suffix = "dump"
+
+
+def is_dump(name):
+    return name.lower().endswith(dump_suffix)
+
+
+def get_reply_suffix(name):
+    for reply_suffix in reply_suffixes:
+        if name.lower().endswith(reply_suffix):
+            if reply_suffix == reply_suffixes[2]:
+                # FIXME workaround for l2_fib_table_entry
+                return 'entry'
+            else:
+                return reply_suffix
+
+# http://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/types.html
+jni_2_java_type_mapping = {'jbyte': 'byte',
+                           'jbyteArray': 'byte[]',
+                           'jchar': 'char',
+                           'jcharArray': 'char[]',
+                           'jshort': 'short',
+                           'jshortArray': 'short[]',
+                           'jint': 'int',
+                           'jintArray': 'int[]',
+                           'jlong': 'long',
+                           'jlongArray': 'long[]',
+                           'jdouble': 'double',
+                           'jdoubleArray': 'double[]',
+                           'jfloat': 'float',
+                           'jfloatArray': 'float[]',
+                           'void': 'void',
+                           'jstring': 'java.lang.String',
+                           'jobject': 'java.lang.Object',
+                           'jobjectArray': 'java.lang.Object[]'
+                           }
+
+# https://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/types.html#type_signatures
+jni_2_signature_mapping = {'jbyte': 'B',
+                           'jbyteArray': '[B',
+                           'jchar': 'C',
+                           'jcharArray': '[C',
+                           'jshort': 'S',
+                           'jshortArray': '[S',
+                           'jint': 'I',
+                           'jintArray': '[I',
+                           'jlong': 'J',
+                           'jlongArray': '[J',
+                           'jdouble': 'D',
+                           'jdoubleArray': '[D',
+                           'jfloat': 'F',
+                           'jfloatArray': '[F'
+                           }
+
+# https://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/functions.html#Get_type_Field_routines
+jni_field_accessors = {
+    'jbyte': 'ByteField',
+    'jbyteArray': 'ObjectField',
+    'jchar': 'CharField',
+    'jcharArray': 'ObjectField',
+    'jshort': 'ShortField',
+    'jshortArray': 'ObjectField',
+    'jint': 'IntField',
+    'jintArray': 'ObjectField',
+    'jlong': 'LongField',
+    'jlongArray': 'ObjectField',
+    'jdouble': 'DoubleField',
+    'jdoubleArray': 'ObjectField',
+    'jfloat': 'FloatField',
+    'jfloatArray': 'ObjectField'
+}
+
+# TODO watch out for unsigned types
+# http://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/types.html
+vpp_2_jni_type_mapping = {'u8': 'jbyte',  # fixme
+                          'i8': 'jbyte',
+                          'u16': 'jchar',
+                          'i16': 'jshort',
+                          'u32': 'jint',  # fixme
+                          'i32': 'jint',
+                          'u64': 'jlong',  # fixme
+                          'i64': 'jlong',
+                          'f64': 'jdouble'
+                          }
+
+# vpe.api calls that do not follow naming conventions and have to be handled exceptionally when finding reply -> request mapping
+# FIXME in vpe.api
+unconventional_naming_rep_req = {
+                                 'cli_reply': 'cli_request',
+                                 'vnet_summary_stats_reply': 'vnet_get_summary_stats',
+                                 # This below is actually a sub-details callback. We cannot derive the mapping of dump request
+                                 # belonging to this sub-details from naming conventions. We need special mapping
+                                 'bridge_domain_sw_if_details': 'bridge_domain',
+                                 # This is standard dump call + details reply. However it's not called details but entry
+                                 'l2_fib_table_entry': 'l2_fib_table'
+                                 }
+
+#
+# FIXME no convention in the naming of events (notifications) in vpe.api
+notifications_message_suffixes = ("event", "counters")
+notification_messages = ["from_netconf_client", "from_netconf_server", "to_netconf_client", "to_netconf_server"]
+
+# messages that must be ignored. These messages are INSUFFICIENTLY marked as disabled in vpe.api
+# FIXME
+ignored_messages = ["is_address_reachable"]
+
+
+def is_notification(param):
+    return param.lower().endswith(notifications_message_suffixes) or param.lower() in notification_messages
+
+
+def is_ignored(param):
+    return param.lower() in ignored_messages
+
+
+def remove_reply_suffix(camel_case_name_with_suffix):
+    return remove_suffix(camel_case_name_with_suffix, get_reply_suffix(camel_case_name_with_suffix))
+
+
+def remove_suffix(camel_case_name_with_suffix, suffix):
+    suffix_length = len(suffix)
+    return camel_case_name_with_suffix[:-suffix_length] if suffix_length != 0 else camel_case_name_with_suffix
+
+
+def is_control_ping(camel_case_name_with_suffix):
+    return "controlping" in camel_case_name_with_suffix.lower()
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/VppConnection.java b/vpp-api/java/jvpp/org/openvpp/jvpp/VppConnection.java
new file mode 100644
index 00000000..72ff62c9
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/VppConnection.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp;
+
+/**
+ * Representation of a management connection to VPP.
+ * Connection is initiated when instance is created, closed with close().
+ */
+public interface VppConnection extends AutoCloseable {
+
+    /**
+     * Check if this instance connection is active.
+     *
+     * @throws IllegalStateException if this instance was disconnected.
+     */
+    void checkActive();
+
+    /**
+     * Closes Vpp connection.
+     */
+    @Override
+    void close();
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/VppJNIConnection.java b/vpp-api/java/jvpp/org/openvpp/jvpp/VppJNIConnection.java
new file mode 100644
index 00000000..9e07cc76
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/VppJNIConnection.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.attribute.PosixFilePermission;
+import java.nio.file.attribute.PosixFilePermissions;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.logging.Logger;
+import org.openvpp.jvpp.callback.JVppCallback;
+
+/**
+ * JNI based representation of a management connection to VPP
+ */
+public final class VppJNIConnection implements VppConnection {
+    private final static Logger LOG = Logger.getLogger(VppJNIConnection.class.getName());
+    private static final String LIBNAME = "libjvpp.so.0.0.0";
+
+    static {
+        try {
+            loadLibrary();
+        } catch (Exception e) {
+            LOG.severe("Can't find vpp jni library: " + LIBNAME);
+            throw new ExceptionInInitializerError(e);
+        }
+    }
+
+    private static void loadStream(final InputStream is) throws IOException {
+        final Set<PosixFilePermission> perms = PosixFilePermissions.fromString("rwxr-x---");
+        final Path p = Files.createTempFile(LIBNAME, null, PosixFilePermissions.asFileAttribute(perms));
+        try {
+            Files.copy(is, p, StandardCopyOption.REPLACE_EXISTING);
+
+            try {
+                Runtime.getRuntime().load(p.toString());
+            } catch (UnsatisfiedLinkError e) {
+                throw new IOException("Failed to load library " + p, e);
+            }
+        } finally {
+            try {
+                Files.deleteIfExists(p);
+            } catch (IOException e) {
+            }
+        }
+    }
+
+    private static void loadLibrary() throws IOException {
+        try (final InputStream is = VppJNIConnection.class.getResourceAsStream('/' + LIBNAME)) {
+            if (is == null) {
+                throw new IOException("Failed to open library resource " + LIBNAME);
+            }
+            loadStream(is);
+        }
+    }
+
+    private final String clientName;
+    private volatile boolean disconnected = false;
+
+    private VppJNIConnection(final String clientName) {
+        if (clientName == null) {
+            throw new NullPointerException("Null clientName");
+        }
+        this.clientName = clientName;
+    }
+
+    /**
+     * Guarded by VppJNIConnection.class
+     */
+    private static final Map<String, VppJNIConnection> connections = new HashMap<>();
+
+    /**
+     * Create a new Vpp connection identified by clientName parameter.
+     *
+     * Multiple instances are allowed since this class is not a singleton
+     * (VPP allows multiple management connections).
+     *
+     * However only a single connection per clientName is allowed.
+     *
+     * @param clientName identifier of vpp connection
+     * @param callback global callback to receive response calls from vpp
+     *
+     * @return new Vpp connection
+     * @throws IOException in case the connection could not be established, or there already is a connection with the same name
+     */
+    public static VppJNIConnection create(final String clientName, final JVppCallback callback) throws IOException {
+        synchronized (VppJNIConnection.class) {
+            if(connections.containsKey(clientName)) {
+                throw new IOException("Client " + clientName + " already connected");
+            }
+
+            final VppJNIConnection vppJNIConnection = new VppJNIConnection(clientName);
+            final int ret = clientConnect(clientName, callback);
+            if (ret != 0) {
+                throw new IOException("Connection returned error " + ret);
+            }
+            connections.put(clientName, vppJNIConnection);
+            return vppJNIConnection;
+        }
+    }
+
+    @Override
+    public final void checkActive() {
+        if (disconnected) {
+            throw new IllegalStateException("Disconnected client " + clientName);
+        }
+    }
+
+    @Override
+    public synchronized final void close() {
+        if (!disconnected) {
+            disconnected = true;
+            try {
+                clientDisconnect();
+            } finally {
+                synchronized (VppJNIConnection.class) {
+                    connections.remove(clientName);
+                }
+            }
+        }
+    }
+
+    private static native int clientConnect(String clientName, JVppCallback callback);
+    private static native void clientDisconnect();
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/callback/JVppCallback.java b/vpp-api/java/jvpp/org/openvpp/jvpp/callback/JVppCallback.java
new file mode 100644
index 00000000..c17f2e0a
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/callback/JVppCallback.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.callback;
+
+/**
+* Base JVppCallback interface
+*/
+public interface JVppCallback {
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppDump.java b/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppDump.java
new file mode 100644
index 00000000..295bbba8
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppDump.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.dto;
+
+/**
+* Base interface for all dump requests
+*/
+public interface JVppDump extends JVppRequest {
+
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppReply.java b/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppReply.java
new file mode 100644
index 00000000..2f4964c4
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppReply.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.dto;
+
+/**
+* Base interface for all reply DTOs
+*/
+public interface JVppReply<REQ extends JVppRequest> {
+
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppReplyDump.java b/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppReplyDump.java
new file mode 100644
index 00000000..4aecedc1
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppReplyDump.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.dto;
+
+/**
+* Base interface for all dump replies
+*/
+public interface JVppReplyDump<REQ extends JVppRequest, RESP extends JVppReply<REQ>>
+    extends JVppReply<REQ> {
+
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppRequest.java b/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppRequest.java
new file mode 100644
index 00000000..8cd1534a
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/dto/JVppRequest.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.dto;
+
+import org.openvpp.jvpp.JVpp;
+
+/**
+* Base interface for all request DTOs
+*/
+public interface JVppRequest {
+
+    /**
+     * Invoke current operation asynchronously on VPP
+     *
+     * @return context id of this request. Can be used to track incomming response
+     */
+    int send(JVpp jvpp);
+
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/future/FutureJVpp.java b/vpp-api/java/jvpp/org/openvpp/jvpp/future/FutureJVpp.java
new file mode 100644
index 00000000..d860bc2d
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/future/FutureJVpp.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.future;
+
+
+import java.util.concurrent.CompletionStage;
+import org.openvpp.jvpp.dto.JVppReply;
+import org.openvpp.jvpp.dto.JVppRequest;
+
+/**
+* Future facade on top of JVpp
+*/
+public interface FutureJVpp {
+
+    /**
+     * Invoke asynchronous operation on VPP
+     *
+     * @return CompletionStage with future result of an async VPP call
+     */
+    <REQ extends JVppRequest, REPLY extends JVppReply<REQ>> CompletionStage<REPLY> send(REQ req);
+
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/future/FutureJVppFacade.java b/vpp-api/java/jvpp/org/openvpp/jvpp/future/FutureJVppFacade.java
new file mode 100644
index 00000000..5b8222c4
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/future/FutureJVppFacade.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.future;
+
+
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import org.openvpp.jvpp.JVpp;
+import org.openvpp.jvpp.dto.ControlPing;
+import org.openvpp.jvpp.dto.JVppDump;
+import org.openvpp.jvpp.dto.JVppReply;
+import org.openvpp.jvpp.dto.JVppReplyDump;
+import org.openvpp.jvpp.dto.JVppRequest;
+
+/**
+* Future facade on top of JVpp
+*/
+public final class FutureJVppFacade implements FutureJVpp {
+
+    private final JVpp jvpp;
+
+    /**
+     * Guarded by self
+     */
+    private final Map<Integer, CompletableFuture<? extends JVppReply<?>>> requests;
+
+    public FutureJVppFacade(final JVpp jvpp,
+                     final Map<Integer, CompletableFuture<? extends JVppReply<?>>> requestMap) {
+        // TODO use guava's preconditions for nonNull and state checks
+        // However adding guava as a dependency requires better build system for Java in VPP project
+        // Currently it's just invocation of javac
+        if(jvpp == null) {
+            throw new NullPointerException("Null jvpp");
+        }
+        this.jvpp = jvpp;
+        if(requestMap == null) {
+            throw new NullPointerException("Null requestMap");
+        }
+        // Request map represents the shared state between this facade and it's callback
+        // where facade puts futures in and callback completes + removes them
+        // TODO what if the call never completes ?
+        this.requests = requestMap;
+    }
+
+    // TODO use Optional in Future, java8
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public <REQ extends JVppRequest, REPLY extends JVppReply<REQ>> CompletionStage<REPLY> send(REQ req) {
+        synchronized(requests) {
+            final int contextId = jvpp.send(req);
+
+            final CompletableFuture<REPLY> replyCompletableFuture;
+            if(req instanceof JVppDump) {
+                replyCompletableFuture = (CompletableFuture<REPLY>) new CompletableDumpFuture<>(contextId);
+            } else {
+                replyCompletableFuture = new CompletableFuture<>();
+            }
+
+            requests.put(contextId, replyCompletableFuture);
+            if(req instanceof JVppDump) {
+                requests.put(jvpp.send(new ControlPing()), replyCompletableFuture);
+            }
+            return replyCompletableFuture;
+        }
+    }
+
+    static final class CompletableDumpFuture<T extends JVppReplyDump<?, ?>> extends CompletableFuture<T> {
+        // TODO make this final
+        // The reason why this is not final is the instantiation of ReplyDump DTOs
+        // Their instantiation must be generated, so currently the DTOs are created in callback and set when first dump reponses
+        // is returned. Because in callback we have method per response, but here where requests are invoked there is only
+        // a single generic send method that does not have enough information to create the DTO
+        // This can be final as soon as we provide specific send methods here
+        private T replyDump;
+        private final long contextId;
+
+        CompletableDumpFuture(final long contextId) {
+            this.contextId = contextId;
+        }
+
+        long getContextId() {
+            return contextId;
+        }
+
+        T getReplyDump() {
+            return replyDump;
+        }
+
+        void setReplyDump(final T replyDump) {
+            this.replyDump = replyDump;
+        }
+    }
+
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/test/CallbackApiTest.java b/vpp-api/java/jvpp/org/openvpp/jvpp/test/CallbackApiTest.java
new file mode 100644
index 00000000..5ac4b69a
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/test/CallbackApiTest.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.test;
+
+import org.openvpp.jvpp.JVpp;
+import org.openvpp.jvpp.JVppImpl;
+import org.openvpp.jvpp.VppJNIConnection;
+import org.openvpp.jvpp.callback.GetNodeIndexCallback;
+import org.openvpp.jvpp.callback.ShowVersionCallback;
+import org.openvpp.jvpp.callback.SwInterfaceCallback;
+import org.openvpp.jvpp.dto.GetNodeIndex;
+import org.openvpp.jvpp.dto.GetNodeIndexReply;
+import org.openvpp.jvpp.dto.ShowVersion;
+import org.openvpp.jvpp.dto.ShowVersionReply;
+import org.openvpp.jvpp.dto.SwInterfaceDetails;
+import org.openvpp.jvpp.dto.SwInterfaceDump;
+
+public class CallbackApiTest {
+
+    private static class TestCallback implements GetNodeIndexCallback, ShowVersionCallback, SwInterfaceCallback {
+
+        @Override
+        public void onGetNodeIndexReply(final GetNodeIndexReply msg) {
+            System.out.printf("Received GetNodeIndexReply: context=%d, retval=%d, nodeIndex=%d\n",
+                    msg.context, msg.retval, msg.nodeIndex);
+        }
+        @Override
+        public void onShowVersionReply(final ShowVersionReply msg) {
+            System.out.printf("Received ShowVersionReply: context=%d, retval=%d, program=%s, version=%s, " +
+                    "buildDate=%s, buildDirectory=%s\n",
+                    msg.context, msg.retval, new String(msg.program), new String(msg.version),
+                    new String(msg.buildDate), new String(msg.buildDirectory));
+        }
+
+        @Override
+        public void onSwInterfaceDetails(final SwInterfaceDetails msg) {
+            System.out.printf("Received SwInterfaceDetails: interfaceName=%s, l2AddressLength=%d, adminUpDown=%d, " +
+                    "linkUpDown=%d, linkSpeed=%d, linkMtu=%d\n",
+                    new String(msg.interfaceName), msg.l2AddressLength, msg.adminUpDown,
+                    msg.linkUpDown, msg.linkSpeed, (int)msg.linkMtu);
+        }
+    }
+
+    private static void testCallbackApi() throws Exception {
+        System.out.println("Testing Java callback API");
+        JVpp jvpp = new JVppImpl(VppJNIConnection.create("CallbackApiTest", new TestCallback()));
+        System.out.println("Successfully connected to VPP");
+
+        System.out.println("Sending ShowVersion request...");
+        jvpp.send(new ShowVersion());
+
+        System.out.println("Sending GetNodeIndex request...");
+        GetNodeIndex getNodeIndexRequest = new GetNodeIndex();
+        getNodeIndexRequest.nodeName = "node0".getBytes();
+        jvpp.send(getNodeIndexRequest);
+
+        System.out.println("Sending SwInterfaceDump request...");
+        SwInterfaceDump swInterfaceDumpRequest = new SwInterfaceDump();
+        swInterfaceDumpRequest.nameFilterValid = 0;
+        swInterfaceDumpRequest.nameFilter = "".getBytes();
+        jvpp.send(swInterfaceDumpRequest);
+
+        Thread.sleep(5000);
+
+        System.out.println("Disconnecting...");
+        jvpp.close();
+        Thread.sleep(1000);
+    }
+
+    public static void main(String[] args) throws Exception {
+        testCallbackApi();
+    }
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/test/CallbackJVppFacadeTest.java b/vpp-api/java/jvpp/org/openvpp/jvpp/test/CallbackJVppFacadeTest.java
new file mode 100644
index 00000000..df3b0e70
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/test/CallbackJVppFacadeTest.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.test;
+
+import java.util.HashMap;
+import java.util.Map;
+import org.openvpp.jvpp.JVpp;
+import org.openvpp.jvpp.JVppImpl;
+import org.openvpp.jvpp.VppJNIConnection;
+import org.openvpp.jvpp.callback.JVppCallback;
+import org.openvpp.jvpp.callback.ShowVersionCallback;
+import org.openvpp.jvpp.callfacade.CallbackJVppFacade;
+import org.openvpp.jvpp.callfacade.CallbackJVppFacadeCallback;
+
+/**
+ * CallbackJVppFacade together with CallbackJVppFacadeCallback allow for setting different callback for each request.
+ * This is more convenient than the approach shown in CallbackApiTest.
+ */
+public class CallbackJVppFacadeTest {
+
+    private static ShowVersionCallback showVersionCallback1 = msg ->
+            System.out.printf("ShowVersionCallback1 received ShowVersionReply: context=%d, retval=%d, program=%s," +
+                            "version=%s, buildDate=%s, buildDirectory=%s\n", msg.context, msg.retval, new String(msg.program),
+                    new String(msg.version), new String(msg.buildDate), new String(msg.buildDirectory));
+
+    private static ShowVersionCallback showVersionCallback2 = msg ->
+            System.out.printf("ShowVersionCallback2 received ShowVersionReply: context=%d, retval=%d, program=%s," +
+                            "version=%s, buildDate=%s, buildDirectory=%s\n", msg.context, msg.retval, new String(msg.program),
+                    new String(msg.version), new String(msg.buildDate), new String(msg.buildDirectory));
+
+    private static void testCallbackFacade() throws Exception {
+        System.out.println("Testing CallbackJVppFacade");
+
+        final Map<Integer, JVppCallback> callbackMap = new HashMap<>();
+        JVpp impl = new JVppImpl(VppJNIConnection.create("CallbackApiTest", new CallbackJVppFacadeCallback(callbackMap)));
+        CallbackJVppFacade jvpp = new CallbackJVppFacade(impl, callbackMap);
+        System.out.println("Successfully connected to VPP");
+
+        jvpp.showVersion(showVersionCallback1);
+        jvpp.showVersion(showVersionCallback2);
+
+
+        Thread.sleep(2000);
+
+        System.out.println("Disconnecting...");
+        impl.close();
+        Thread.sleep(1000);
+    }
+
+    public static void main(String[] args) throws Exception {
+        testCallbackFacade();
+    }
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/test/ControlPingTest.java b/vpp-api/java/jvpp/org/openvpp/jvpp/test/ControlPingTest.java
new file mode 100644
index 00000000..f1bd41de
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/test/ControlPingTest.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.test;
+
+import org.openvpp.jvpp.JVpp;
+import org.openvpp.jvpp.JVppImpl;
+import org.openvpp.jvpp.VppJNIConnection;
+import org.openvpp.jvpp.callback.ControlPingCallback;
+import org.openvpp.jvpp.dto.ControlPing;
+import org.openvpp.jvpp.dto.ControlPingReply;
+
+public class ControlPingTest {
+
+    private static void testControlPing() throws Exception {
+        System.out.println("Testing ControlPing using Java callback API");
+
+        JVpp jvpp = new JVppImpl(VppJNIConnection.create("ControlPingTest", new ControlPingCallback() {
+            @Override
+            public void onControlPingReply(final ControlPingReply reply) {
+                System.out.printf("Received ControlPingReply: context=%d, retval=%d, clientIndex=%d vpePid=%d\n",
+                        reply.context, reply.retval, reply.clientIndex, reply.vpePid);
+            }
+        }));
+        System.out.println("Successfully connected to VPP");
+        Thread.sleep(1000);
+
+        jvpp.send(new ControlPing());
+
+        Thread.sleep(2000);
+
+        System.out.println("Disconnecting...");
+        jvpp.close();
+        Thread.sleep(1000);
+    }
+
+    public static void main(String[] args) throws Exception {
+        testControlPing();
+    }
+}
diff --git a/vpp-api/java/jvpp/org/openvpp/jvpp/test/FutureApiTest.java b/vpp-api/java/jvpp/org/openvpp/jvpp/test/FutureApiTest.java
new file mode 100644
index 00000000..b5b36d58
--- /dev/null
+++ b/vpp-api/java/jvpp/org/openvpp/jvpp/test/FutureApiTest.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openvpp.jvpp.test;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Future;
+import org.openvpp.jvpp.VppJNIConnection;
+import org.openvpp.jvpp.dto.GetNodeIndex;
+import org.openvpp.jvpp.dto.GetNodeIndexReply;
+import org.openvpp.jvpp.dto.JVppReply;
+import org.openvpp.jvpp.dto.ShowVersion;
+import org.openvpp.jvpp.dto.ShowVersionReply;
+import org.openvpp.jvpp.dto.SwInterfaceDetails;
+import org.openvpp.jvpp.dto.SwInterfaceDetailsReplyDump;
+import org.openvpp.jvpp.dto.SwInterfaceDump;
+import org.openvpp.jvpp.future.FutureJVppFacade;
+import org.openvpp.jvpp.future.FutureJVppFacadeCallback;
+
+public class FutureApiTest {
+
+    private static void testShowVersion(final FutureJVppFacade jvpp) {
+        System.out.println("Sending ShowVersion request...");
+        try {
+            final Future<JVppReply<ShowVersion>> replyFuture = jvpp.send(new ShowVersion()).toCompletableFuture();
+            final ShowVersionReply reply = (ShowVersionReply) replyFuture.get(); // TODO can we get rid of that cast?
+            System.out.printf("Received ShowVersionReply: context=%d, retval=%d, program=%s, " +
+                            "version=%s, buildDate=%s, buildDirectory=%s\n",
+                    reply.context, reply.retval, new String(reply.program), new String(reply.version),
+                    new String(reply.buildDate), new String(reply.buildDirectory));
+        } catch (Exception e) {
+            System.err.printf("ShowVersion request failed:\n");
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * This test will fail with some error code if node 'node0' is not defined.
+     * TODO: consider adding error messages specific for given api calls
+     */
+    private static void testGetNodeIndex(final FutureJVppFacade jvpp) {
+        System.out.println("Sending GetNodeIndex request...");
+        try {
+            final GetNodeIndex request = new GetNodeIndex();
+            request.nodeName = "node0".getBytes();
+            final Future<JVppReply<GetNodeIndex>> replyFuture = jvpp.send(request).toCompletableFuture();
+            final GetNodeIndexReply reply = (GetNodeIndexReply) replyFuture.get();
+            System.out.printf("Received GetNodeIndexReply: context=%d, retval=%d, nodeIndex=%d\n",
+                    reply.context, reply.retval, reply.nodeIndex);
+        } catch (Exception e) {
+            System.err.printf("GetNodeIndex request failed:\n");
+            e.printStackTrace();
+        }
+    }
+
+    private static void testSwInterfaceDump(final FutureJVppFacade jvpp) {
+        System.out.println("Sending SwInterfaceDump request...");
+        try {
+            final SwInterfaceDump request = new SwInterfaceDump();
+            request.nameFilterValid = 0;
+            request.nameFilter = "".getBytes();
+            final Future<JVppReply<SwInterfaceDump>> replyFuture = jvpp.send(request).toCompletableFuture();
+            final SwInterfaceDetailsReplyDump reply = (SwInterfaceDetailsReplyDump) replyFuture.get();
+
+            if (reply == null) {
+                throw new IllegalStateException("SwInterfaceDetailsReplyDump is null!");
+            }
+            if (reply.swInterfaceDetails == null) {
+                throw new IllegalStateException("SwInterfaceDetailsReplyDump.swInterfaceDetails is null!");
+            }
+
+            for (SwInterfaceDetails details : reply.swInterfaceDetails) {
+                if (details == null) {
+                    throw new IllegalStateException("reply.swInterfaceDetails contains null element!");
+                }
+
+                System.out.printf("Received SwInterfaceDetails: interfaceName=%s, l2AddressLength=%d, adminUpDown=%d, " +
+                                "linkUpDown=%d, linkSpeed=%d, linkMtu=%d\n",
+                        new String(details.interfaceName), details.l2AddressLength, details.adminUpDown,
+                        details.linkUpDown, details.linkSpeed, (int) details.linkMtu);
+            }
+        } catch (Exception e) {
+            System.err.printf("SwInterfaceDump request failed:\n");
+            e.printStackTrace();
+        }
+    }
+
+    private static void testFutureApi() throws Exception {
+        System.out.println("Testing Java future API");
+
+        final Map<Integer, CompletableFuture<? extends JVppReply<?>>>  map = new HashMap<>();
+        final org.openvpp.jvpp.JVppImpl impl =
+                new org.openvpp.jvpp.JVppImpl(VppJNIConnection.create("FutureApiTest", new FutureJVppFacadeCallback(map)));
+        final FutureJVppFacade jvpp = new FutureJVppFacade(impl, map);
+        System.out.println("Successfully connected to VPP");
+
+        testShowVersion(jvpp);
+        testGetNodeIndex(jvpp);
+        testSwInterfaceDump(jvpp);
+
+        System.out.println("Disconnecting...");
+        // TODO we should consider adding jvpp.close(); to the facade
+        impl.close();
+    }
+
+    public static void main(String[] args) throws Exception {
+        testFutureApi();
+    }
+}