VPP-205: jvpp plugin support.

Splits jvpp into two jars
jvpp-registry.jar - base jvpp functionality
jvpp-core.jar - Java wrapper for vpe.api

Plugins can be generated the same way jvpp-core.jar is.
Example (nsh):
https://gerrit.fd.io/r/#/c/2118/

Change-Id: I2254f90b2c3e423563bb91bf70877979f1e90a7d
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

25 files changed, 1533 insertions, 0 deletions

diff --git a/vpp-api/java/jvpp-registry/jvpp_registry.c b/vpp-api/java/jvpp-registry/jvpp_registry.c
new file mode 100644
index 00000000000..1c9871bb8db
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/jvpp_registry.c
@@ -0,0 +1,349 @@
+/*
+ * 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.
+ */
+#define _GNU_SOURCE /* for strcasestr(3) */
+#include <vnet/vnet.h>
+
+#define vl_api_version(n,v) static u32 vpe_api_version = (v);
+#include <vpp-api/vpe.api.h>
+#undef vl_api_version
+
+#include <jni.h>
+#include <jvpp-common/jvpp_common.h>
+#include "org_openvpp_jvpp_VppJNIConnection.h"
+#include "org_openvpp_jvpp_JVppRegistryImpl.h"
+
+#include <vpp-api/vpe_msg_enum.h>
+#define vl_typedefs             /* define message structures */
+#include <vpp-api/vpe_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun
+#include <vpp-api/vpe_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...)
+#define vl_printfun
+#include <vpp-api/vpe_all_api_h.h>
+#undef vl_printfun
+
+/*
+ * The Java runtime isn't compile w/ -fstack-protector,
+ * so we have to supply missing external references for the
+ * regular vpp libraries.
+ */
+void __stack_chk_guard(void) __attribute__((weak));
+void __stack_chk_guard(void) {
+}
+
+typedef struct {
+    /* UThread attachment */
+    volatile u32 control_ping_result_ready;
+    volatile i32 control_ping_retval;
+
+    /* Control poing callback */
+    jobject registryObject;
+    jclass registryClass;
+    jclass controlPingReplyClass;
+    jclass callbackExceptionClass;
+
+    /* Thread cleanup */
+    pthread_key_t cleanup_rx_thread_key;
+
+    /* Connected indication */
+    volatile u8 is_connected;
+} jvpp_registry_main_t;
+
+jvpp_registry_main_t jvpp_registry_main __attribute__((aligned (64)));
+
+void vl_client_add_api_signatures(vl_api_memclnt_create_t *mp) {
+    /*
+     * Send the main API signature in slot 0. This bit of code must
+     * match the checks in ../vpe/api/api.c: vl_msg_api_version_check().
+     */
+    mp->api_versions[0] = clib_host_to_net_u32(vpe_api_version);
+}
+
+/* cleanup handler for RX thread */
+static_always_inline void cleanup_rx_thread(void *arg) {
+    jvpp_main_t * jm = &jvpp_main;
+    jvpp_registry_main_t * rm = &jvpp_registry_main;
+
+    vppjni_lock(jm, 99);
+
+    int getEnvStat = (*jm->jvm)->GetEnv(jm->jvm, (void **) &(jm->jenv),
+    JNI_VERSION_1_8);
+    if (getEnvStat == JNI_EVERSION) {
+        clib_warning("Unsupported JNI version\n");
+        rm->control_ping_retval = VNET_API_ERROR_UNSUPPORTED_JNI_VERSION;
+        goto out;
+    } else if (getEnvStat != JNI_EDETACHED) {
+        (*jm->jvm)->DetachCurrentThread(jm->jvm);
+    }
+    out: vppjni_unlock(jm);
+}
+
+static void vl_api_control_ping_reply_t_handler(
+        vl_api_control_ping_reply_t * mp) {
+    jvpp_main_t * jm = &jvpp_main;
+    jvpp_registry_main_t * rm = &jvpp_registry_main;
+    char was_thread_connected = 0;
+
+    // attach to java thread if not attached
+    int getEnvStat = (*jm->jvm)->GetEnv(jm->jvm, (void **) &(jm->jenv),
+            JNI_VERSION_1_8);
+    if (getEnvStat == JNI_EDETACHED) {
+        if ((*jm->jvm)->AttachCurrentThread(jm->jvm, (void **) &(jm->jenv),
+                NULL) != 0) {
+            clib_warning("Failed to attach thread\n");
+            rm->control_ping_retval =
+                    VNET_API_ERROR_FAILED_TO_ATTACH_TO_JAVA_THREAD;
+            goto out;
+        }
+
+        // workaround as we can't use pthread_cleanup_push
+        pthread_key_create(&rm->cleanup_rx_thread_key, cleanup_rx_thread);
+        // destructor is only called if the value of key is non null
+        pthread_setspecific(rm->cleanup_rx_thread_key, (void *) 1);
+        was_thread_connected = 1;
+    } else if (getEnvStat == JNI_EVERSION) {
+        clib_warning("Unsupported JNI version\n");
+        rm->control_ping_retval = VNET_API_ERROR_UNSUPPORTED_JNI_VERSION;
+        goto out;
+    }
+
+    if (was_thread_connected == 0) {
+        JNIEnv *env = jm->jenv;
+        if (mp->retval < 0) {
+            call_on_error("controlPing", mp->context, mp->retval,
+                    rm->registryClass, rm->registryObject,
+                    rm->callbackExceptionClass);
+        } else {
+            jmethodID constructor = (*env)->GetMethodID(env,
+                    rm->controlPingReplyClass, "<init>", "()V");
+            jmethodID callbackMethod = (*env)->GetMethodID(env,
+                    rm->registryClass, "onControlPingReply",
+                    "(Lorg/openvpp/jvpp/dto/ControlPingReply;)V");
+
+            jobject dto = (*env)->NewObject(env, rm->controlPingReplyClass,
+                    constructor);
+
+            jfieldID contextFieldId = (*env)->GetFieldID(env,
+                    rm->controlPingReplyClass, "context", "I");
+            (*env)->SetIntField(env, dto, contextFieldId,
+                    clib_net_to_host_u32(mp->context));
+
+            jfieldID clientIndexFieldId = (*env)->GetFieldID(env,
+                    rm->controlPingReplyClass, "clientIndex", "I");
+            (*env)->SetIntField(env, dto, clientIndexFieldId,
+                    clib_net_to_host_u32(mp->client_index));
+
+            jfieldID vpePidFieldId = (*env)->GetFieldID(env,
+                    rm->controlPingReplyClass, "vpePid", "I");
+            (*env)->SetIntField(env, dto, vpePidFieldId,
+                    clib_net_to_host_u32(mp->vpe_pid));
+
+            (*env)->CallVoidMethod(env, rm->registryObject, callbackMethod,
+                    dto);
+        }
+    }
+
+    out: rm->control_ping_result_ready = 1;
+}
+
+static int send_initial_control_ping() {
+    f64 timeout;
+    clib_time_t clib_time;
+    vl_api_control_ping_t * mp;
+    jvpp_main_t * jm = &jvpp_main;
+    jvpp_registry_main_t * rm = &jvpp_registry_main;
+
+    clib_time_init(&clib_time);
+
+    rm->control_ping_result_ready = 0;
+    mp = vl_msg_api_alloc(sizeof(*mp));
+    memset(mp, 0, sizeof(*mp));
+    mp->_vl_msg_id = ntohs(VL_API_CONTROL_PING);
+    mp->client_index = jm->my_client_index;
+
+    // send message:
+    vl_msg_api_send_shmem(jm->vl_input_queue, (u8 *) &mp);
+
+    // wait for results: Current time + 10 seconds is the timeout
+    timeout = clib_time_now(&clib_time) + 10.0;
+    int rv = VNET_API_ERROR_RESPONSE_NOT_READY;
+    while (clib_time_now(&clib_time) < timeout) {
+        if (rm->control_ping_result_ready == 1) {
+            rv = rm->control_ping_retval;
+            break;
+        }
+    }
+
+    if (rv != 0) {
+        clib_warning("common: first control ping failed: %d", rv);
+    }
+
+    return rv;
+}
+
+static int connect_to_vpe(char *name) {
+    jvpp_main_t * jm = &jvpp_main;
+    api_main_t * am = &api_main;
+
+    if (vl_client_connect_to_vlib("/vpe-api", name, 32) < 0)
+        return -1;
+
+    jm->my_client_index = am->my_client_index;
+
+    jm->vl_input_queue = am->shmem_hdr->vl_input_queue;
+
+    vl_msg_api_set_handlers(VL_API_CONTROL_PING_REPLY, "control_ping_reply",
+            vl_api_control_ping_reply_t_handler, vl_noop_handler,
+            vl_api_control_ping_reply_t_endian,
+            vl_api_control_ping_reply_t_print,
+            sizeof(vl_api_control_ping_reply_t), 1);
+
+    send_initial_control_ping();
+
+    return 0;
+}
+
+JNIEXPORT jobject JNICALL Java_org_openvpp_jvpp_VppJNIConnection_clientConnect(
+        JNIEnv *env, jclass obj, jstring clientName) {
+    int rv;
+    const char *client_name;
+    void vl_msg_reply_handler_hookup(void);
+    jvpp_main_t * jm = &jvpp_main;
+    jvpp_registry_main_t * rm = &jvpp_registry_main;
+
+    jclass connectionInfoClass = (*env)->FindClass(env,
+            "org/openvpp/jvpp/VppJNIConnection$ConnectionInfo");
+    jmethodID connectionInfoConstructor = (*env)->GetMethodID(env,
+            connectionInfoClass, "<init>", "(JII)V");
+
+    /*
+     * Bail out now if we're not running as root
+     */
+    if (geteuid() != 0) {
+        return (*env)->NewObject(env, connectionInfoClass,
+                connectionInfoConstructor, 0, 0,
+                VNET_API_ERROR_NOT_RUNNING_AS_ROOT);
+    }
+
+    if (rm->is_connected) {
+        return (*env)->NewObject(env, connectionInfoClass,
+                connectionInfoConstructor, 0, 0,
+                VNET_API_ERROR_ALREADY_CONNECTED);
+    }
+
+    client_name = (*env)->GetStringUTFChars(env, clientName, 0);
+    if (!client_name) {
+        return (*env)->NewObject(env, connectionInfoClass,
+                connectionInfoConstructor, 0, 0, VNET_API_ERROR_INVALID_VALUE);
+    }
+
+    rv = connect_to_vpe((char *) client_name);
+
+    if (rv < 0)
+        clib_warning("connection failed, rv %d", rv);
+
+    (*env)->ReleaseStringUTFChars(env, clientName, client_name);
+
+    return (*env)->NewObject(env, connectionInfoClass,
+            connectionInfoConstructor, (jlong) jm->vl_input_queue,
+            (jint) jm->my_client_index, (jint) rv);
+}
+
+JNIEXPORT jint JNICALL Java_org_openvpp_jvpp_JVppRegistryImpl_controlPing0(
+        JNIEnv *env, jobject regstryObject) {
+    jvpp_main_t * jm = &jvpp_main;
+    vl_api_control_ping_t * mp;
+    u32 my_context_id = vppjni_get_context_id(&jvpp_main);
+    jvpp_registry_main_t * rm = &jvpp_registry_main;
+
+    if (rm->registryObject == 0) {
+        rm->registryObject = (*env)->NewGlobalRef(env, regstryObject);
+    }
+    if (rm->registryClass == 0) {
+        rm->registryClass = (jclass) (*env)->NewGlobalRef(env,
+                (*env)->GetObjectClass(env, regstryObject));
+    }
+
+    mp = vl_msg_api_alloc(sizeof(*mp));
+    memset(mp, 0, sizeof(*mp));
+    mp->_vl_msg_id = ntohs(VL_API_CONTROL_PING);
+    mp->client_index = jm->my_client_index;
+    mp->context = clib_host_to_net_u32(my_context_id);
+
+    // send message:
+    vl_msg_api_send_shmem(jm->vl_input_queue, (u8 *) &mp);
+    return my_context_id;
+}
+
+JNIEXPORT void JNICALL Java_org_openvpp_jvpp_VppJNIConnection_clientDisconnect(
+        JNIEnv *env, jclass clazz) {
+    jvpp_registry_main_t * rm = &jvpp_registry_main;
+    rm->is_connected = 0; // TODO make thread safe
+    vl_client_disconnect_from_vlib();
+
+    // cleanup:
+    if (rm->registryObject) {
+        (*env)->DeleteGlobalRef(env, rm->registryObject);
+        rm->registryObject = 0;
+    }
+    if (rm->registryClass) {
+        (*env)->DeleteGlobalRef(env, rm->registryClass);
+        rm->registryClass = 0;
+    }
+}
+
+jint JNI_OnLoad(JavaVM *vm, void *reserved) {
+    jvpp_main_t * jm = &jvpp_main;
+    jvpp_registry_main_t * rm = &jvpp_registry_main;
+    JNIEnv* env;
+
+    if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_8) != JNI_OK) {
+        return JNI_EVERSION;
+    }
+
+    rm->controlPingReplyClass = (jclass) (*env)->NewGlobalRef(env,
+            (*env)->FindClass(env, "org/openvpp/jvpp/dto/ControlPingReply"));
+    if ((*env)->ExceptionCheck(env)) {
+        (*env)->ExceptionDescribe(env);
+        clib_warning("Failed to cache class references\n");
+        return JNI_ERR;
+    }
+
+    rm->callbackExceptionClass = (jclass) (*env)->NewGlobalRef(env,
+            (*env)->FindClass(env, "org/openvpp/jvpp/VppCallbackException"));
+    if ((*env)->ExceptionCheck(env)) {
+        (*env)->ExceptionDescribe(env);
+        return JNI_ERR;
+    }
+
+    jm->jvm = vm;
+    return JNI_VERSION_1_8;
+}
+
+void JNI_OnUnload(JavaVM *vm, void *reserved) {
+    jvpp_main_t * jm = &jvpp_main;
+    JNIEnv* env;
+    if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_8) != JNI_OK) {
+        return;
+    }
+
+    jm->jenv = NULL;
+    jm->jvm = NULL;
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/JVpp.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/JVpp.java
new file mode 100644
index 00000000000..53bae04c859
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/JVpp.java
@@ -0,0 +1,56 @@
+/*
+ * 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 org.openvpp.jvpp.callback.JVppCallback;
+import org.openvpp.jvpp.dto.ControlPing;
+import org.openvpp.jvpp.dto.JVppRequest;
+
+/**
+ * Base interface for plugin's Java API.
+ */
+public interface JVpp extends AutoCloseable {
+
+    /**
+     * Sends request to vpp.
+     *
+     * @param request request to be sent
+     * @return unique identifer of message in message queue
+     * @throws VppInvocationException when message could not be sent
+     */
+    int send(final JVppRequest request) throws VppInvocationException;
+
+    /**
+     * Initializes plugin's Java API.
+     *
+     * @param registry     plugin registry
+     * @param callback     called by vpe.api message handlers
+     * @param queueAddress address of vpp shared memory queue
+     * @param clientIndex  vpp client identifier
+     */
+    void init(final JVppRegistry registry, final JVppCallback callback, final long queueAddress,
+              final int clientIndex);
+
+    /**
+     * Sends control_ping message.
+     *
+     * @param controlPing request DTO
+     * @return unique identifer of message in message queue
+     * @throws VppInvocationException when message could not be sent
+     */
+    int controlPing(final ControlPing controlPing) throws VppInvocationException;
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/JVppRegistry.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/JVppRegistry.java
new file mode 100644
index 00000000000..c25b6536bb1
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/JVppRegistry.java
@@ -0,0 +1,69 @@
+/*
+ * 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 org.openvpp.jvpp.callback.JVppCallback;
+
+/**
+ * Manages VPP connection and stores plugin callbacks.
+ */
+public interface JVppRegistry extends AutoCloseable {
+
+    /**
+     * Vpp connection managed by the registry.
+     *
+     * @return representation of vpp connection
+     */
+    VppConnection getConnection();
+
+    /**
+     * Registers callback and initializes Java API for given plugin.
+     *
+     * @param jvpp     plugin name
+     * @param callback callback provided by the plugin
+     * @throws NullPointerException     if name or callback is null
+     * @throws IllegalArgumentException if plugin was already registered
+     */
+    void register(final JVpp jvpp, final JVppCallback callback);
+
+    /**
+     * Unregisters callback for the given plugin.
+     *
+     * @param name plugin name
+     * @throws NullPointerException     if name is null
+     * @throws IllegalArgumentException if plugin was not registered
+     */
+    void unregister(final String name);
+
+    /**
+     * Returns callback registered for the plugin.
+     *
+     * @param name plugin name
+     * @return callback provided by the plugin
+     * @throws NullPointerException     if name is null
+     * @throws IllegalArgumentException if plugin was not registered
+     */
+    JVppCallback get(final String name);
+
+    /**
+     * Sends control ping. Reply handler calls callback registered for give plugin.
+     *
+     * @param clazz identifies plugin that should receive ping callback
+     * @return unique identifer of message in message queue
+     */
+    int controlPing(final Class<? extends JVpp> clazz) throws VppInvocationException;
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/JVppRegistryImpl.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/JVppRegistryImpl.java
new file mode 100644
index 00000000000..bb6730f4cae
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/JVppRegistryImpl.java
@@ -0,0 +1,133 @@
+/*
+ * 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 static java.util.Objects.requireNonNull;
+
+import java.io.IOException;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import org.openvpp.jvpp.callback.ControlPingCallback;
+import org.openvpp.jvpp.callback.JVppCallback;
+import org.openvpp.jvpp.dto.ControlPingReply;
+
+/**
+ * Default implementation of JVppRegistry.
+ */
+public final class JVppRegistryImpl implements JVppRegistry, ControlPingCallback {
+
+    private static final Logger LOG = Logger.getLogger(JVppRegistryImpl.class.getName());
+
+    private final VppJNIConnection connection;
+    private final ConcurrentMap<String, JVppCallback> pluginRegistry;
+    private final ConcurrentMap<Integer, ControlPingCallback> pingCalls;
+
+    public JVppRegistryImpl(final String clientName) throws IOException {
+        connection = new VppJNIConnection(clientName);
+        connection.connect();
+        pluginRegistry = new ConcurrentHashMap<>();
+        pingCalls = new ConcurrentHashMap<>();
+    }
+
+    @Override
+    public VppConnection getConnection() {
+        return connection;
+    }
+
+    @Override
+    public void register(final JVpp jvpp, final JVppCallback callback) {
+        requireNonNull(jvpp, "jvpp should not be null");
+        requireNonNull(callback, "Callback should not be null");
+        final String name = jvpp.getClass().getName();
+        if (pluginRegistry.putIfAbsent(name, callback) != null) {
+            throw new IllegalArgumentException(String.format("Callback for plugin %s was already registered", name));
+        }
+        jvpp.init(this, callback, connection.getConnectionInfo().queueAddress,
+            connection.getConnectionInfo().clientIndex);
+    }
+
+    @Override
+    public void unregister(final String name) {
+        requireNonNull(name, "Plugin name should not be null");
+        final JVppCallback previous = pluginRegistry.remove(name);
+        assertPluginWasRegistered(name, previous);
+    }
+
+    @Override
+    public JVppCallback get(final String name) {
+        requireNonNull(name, "Plugin name should not be null");
+        JVppCallback value = pluginRegistry.get(name);
+        assertPluginWasRegistered(name, value);
+        return value;
+    }
+
+    private native int controlPing0() throws VppInvocationException;
+
+    @Override
+    public int controlPing(final Class<? extends JVpp> clazz) throws VppInvocationException {
+        connection.checkActive();
+        final String name = clazz.getName();
+
+        final ControlPingCallback callback = (ControlPingCallback) pluginRegistry.get(clazz.getName());
+        assertPluginWasRegistered(name, callback);
+
+        int context = controlPing0();
+        if (context < 0) {
+            throw new VppInvocationException("controlPing", context);
+        }
+
+        pingCalls.put(context, callback);
+        return context;
+    }
+
+
+    @Override
+    public void onControlPingReply(final ControlPingReply reply) {
+        final ControlPingCallback callback = pingCalls.get(reply.context);
+        if (callback == null) {
+            LOG.log(Level.WARNING, "No callback was registered for reply id={0} ", reply.context);
+            return;
+        }
+        // pass the reply to the callback registered by the ping caller
+        callback.onControlPingReply(reply);
+    }
+
+    @Override
+    public void onError(final VppCallbackException ex) {
+        final int ctxId = ex.getCtxId();
+        final ControlPingCallback callback = pingCalls.get(ctxId);
+        if (callback == null) {
+            LOG.log(Level.WARNING, "No callback was registered for reply id={0} ", ctxId);
+            return;
+        }
+        // pass the error to the callback registered by the ping caller
+        callback.onError(ex);
+    }
+
+    private static void assertPluginWasRegistered(final String name, final JVppCallback value) {
+        if (value == null) {
+            throw new IllegalArgumentException(String.format("Callback for plugin %s is not registered", name));
+        }
+    }
+
+    @Override
+    public void close() throws Exception {
+        connection.close();
+    }
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/NativeLibraryLoader.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/NativeLibraryLoader.java
new file mode 100644
index 00000000000..d00c41d59b4
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/NativeLibraryLoader.java
@@ -0,0 +1,73 @@
+/*
+ * 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.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * Utility class for loading JNI libraries.
+ */
+public final class NativeLibraryLoader {
+
+    private static final Logger LOG = Logger.getLogger(NativeLibraryLoader.class.getName());
+
+    private NativeLibraryLoader() {
+        throw new UnsupportedOperationException("This utility class cannot be instantiated.");
+    }
+
+    /**
+     * Loads JNI library using class loader of the given class.
+     *
+     * @param libName name of the library to be loaded
+     */
+    public static void loadLibrary(final String libName, final Class clazz) throws IOException {
+        java.util.Objects.requireNonNull(libName, "libName should not be null");
+        java.util.Objects.requireNonNull(clazz, "clazz should not be null");
+        try (final InputStream is = clazz.getResourceAsStream('/' + libName)) {
+            if (is == null) {
+                throw new IOException("Failed to open library resource " + libName);
+            }
+            loadStream(libName, is);
+        }
+    }
+
+    private static void loadStream(final String libName, 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);
+            Runtime.getRuntime().load(p.toString());
+        } catch (Exception e) {
+            throw new IOException("Failed to load library " + p, e);
+        } finally {
+            try {
+                Files.deleteIfExists(p);
+            } catch (IOException e) {
+                LOG.log(Level.WARNING, String.format("Failed to delete temporary file %s.", p), e);
+            }
+        }
+    }
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppBaseCallException.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppBaseCallException.java
new file mode 100644
index 00000000000..792af2c69ec
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppBaseCallException.java
@@ -0,0 +1,60 @@
+/*
+ * 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;
+
+/**
+ * Base exception representing failed operation of JVpp request call
+ */
+public abstract class VppBaseCallException extends Exception {
+    private final String methodName;
+    private final int errorCode;
+
+    /**
+     * Constructs an VppCallbackException with the specified api method name and error code.
+     *
+     * @param methodName name of a method, which invocation or execution failed
+     * @param errorCode  negative error code value associated with this failure
+     * @throws NullPointerException     if apiMethodName is null
+     */
+    public VppBaseCallException(final String methodName, final int errorCode) {
+        super(String.format("vppApi.%s failed with error code: %d", methodName, errorCode));
+        this.methodName = java.util.Objects.requireNonNull(methodName, "apiMethodName is null!");
+        this.errorCode = errorCode;
+        if(errorCode >= 0) {
+            throw new IllegalArgumentException("Error code must be < 0. Was " + errorCode +
+                    " for " + methodName );
+        }
+    }
+
+    /**
+     * Returns  name of a method, which invocation failed.
+     *
+     * @return method name
+     */
+    public String getMethodName() {
+        return methodName;
+    }
+
+    /**
+     * Returns the error code associated with this failure.
+     *
+     * @return a negative integer error code
+     */
+    public int getErrorCode() {
+        return errorCode;
+    }
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppCallbackException.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppCallbackException.java
new file mode 100644
index 00000000000..3d2a1cb2013
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppCallbackException.java
@@ -0,0 +1,47 @@
+/*
+ * 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 Exception representing failed operation of JVpp request call
+ */
+public class VppCallbackException extends VppBaseCallException {
+    private final int ctxId;
+
+    /**
+     * Constructs an VppCallbackException with the specified api method name and error code.
+     *
+     * @param methodName  name of a method, which invocation failed.
+     * @param ctxId      api request context identifier
+     * @param errorCode  negative error code value associated with this failure
+     * @throws NullPointerException     if apiMethodName is null
+     */
+    public VppCallbackException(final String methodName, final int ctxId, final int errorCode ){
+        super(methodName, errorCode);
+        this.ctxId = ctxId;
+    }
+
+    /**
+     * Returns api request context identifier.
+     *
+     * @return value of context identifier
+     */
+    public int getCtxId() {
+        return ctxId;
+    }
+
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppConnection.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppConnection.java
new file mode 100644
index 00000000000..e7055f9042f
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppConnection.java
@@ -0,0 +1,45 @@
+/*
+ * 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;
+
+/**
+ * Representation of a management connection to VPP.
+ */
+public interface VppConnection extends AutoCloseable {
+
+    /**
+     * Opens VppConnection for communication with VPP.
+     *
+     * @throws IOException if connection is not established
+     */
+    void connect() throws IOException;
+
+    /**
+     * Checks 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-registry/org/openvpp/jvpp/VppInvocationException.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppInvocationException.java
new file mode 100644
index 00000000000..298bcd0ae55
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppInvocationException.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;
+
+/**
+ * Exception thrown when Vpp jAPI method invocation failed.
+ */
+public class VppInvocationException extends VppBaseCallException {
+    /**
+     * Constructs an VppApiInvocationFailedException with the specified api method name and error code.
+     *
+     * @param methodName  name of a method, which invocation failed.
+     * @param errorCode  negative error code value associated with this failure
+     * @throws NullPointerException     if apiMethodName is null
+     */
+    public VppInvocationException(final String methodName, final int errorCode) {
+        super(methodName, errorCode);
+    }
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppJNIConnection.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppJNIConnection.java
new file mode 100644
index 00000000000..f35298741b6
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/VppJNIConnection.java
@@ -0,0 +1,137 @@
+/*
+ * 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 static org.openvpp.jvpp.NativeLibraryLoader.loadLibrary;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * JNI based representation of a management connection to VPP.
+ */
+public final class VppJNIConnection implements VppConnection {
+    private static final Logger LOG = Logger.getLogger(VppJNIConnection.class.getName());
+
+    static {
+        final String libName = "libjvpp_registry.so.0.0.0";
+        try {
+            loadLibrary(libName, VppJNIConnection.class);
+        } catch (IOException e) {
+            LOG.log(Level.SEVERE, String.format("Can't find vpp jni library: %s", libName), e);
+            throw new ExceptionInInitializerError(e);
+        }
+    }
+
+    private ConnectionInfo connectionInfo;
+
+    private final String clientName;
+    private volatile boolean disconnected = false;
+
+    /**
+     * Create VPPJNIConnection instance for client connecting to VPP.
+     *
+     * @param clientName client name instance to be used for communication. Single connection per clientName is
+     *                   allowed.
+     */
+    public VppJNIConnection(final String clientName) {
+        this.clientName = Objects.requireNonNull(clientName, "Null clientName");
+    }
+
+    /**
+     * Guarded by VppJNIConnection.class
+     */
+    private static final Map<String, VppJNIConnection> connections = new HashMap<>();
+
+    /**
+     * Initiate VPP connection for current instance
+     *
+     * 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.
+     *
+     * @throws IOException in case the connection could not be established
+     */
+
+    @Override
+    public void connect() throws IOException {
+        _connect();
+    }
+
+    private void _connect() throws IOException {
+        synchronized (VppJNIConnection.class) {
+            if (connections.containsKey(clientName)) {
+                throw new IOException("Client " + clientName + " already connected");
+            }
+
+            connectionInfo = clientConnect(clientName);
+            if (connectionInfo.status != 0) {
+                throw new IOException("Connection returned error " + connectionInfo.status);
+            }
+            connections.put(clientName, this);
+        }
+    }
+
+    @Override
+    public final void checkActive() {
+        if (disconnected) {
+            throw new IllegalStateException("Disconnected client " + clientName);
+        }
+    }
+
+    @Override
+    public final synchronized void close() {
+        if (!disconnected) {
+            disconnected = true;
+            try {
+                clientDisconnect();
+            } finally {
+                synchronized (VppJNIConnection.class) {
+                    connections.remove(clientName);
+                }
+            }
+        }
+    }
+
+    public ConnectionInfo getConnectionInfo() {
+        return connectionInfo;
+    }
+
+    /**
+     * VPP connection information used by plugins to reuse the connection.
+     */
+    public static final class ConnectionInfo {
+        public final long queueAddress;
+        public final int clientIndex;
+        public final int status; // FIXME throw exception instead
+
+        public ConnectionInfo(long queueAddress, int clientIndex, int status) {
+            this.queueAddress = queueAddress;
+            this.clientIndex = clientIndex;
+            this.status = status;
+        }
+    }
+
+    private static native ConnectionInfo clientConnect(String clientName);
+
+    private static native void clientDisconnect();
+
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/callback/ControlPingCallback.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/callback/ControlPingCallback.java
new file mode 100644
index 00000000000..529ea220b0a
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/callback/ControlPingCallback.java
@@ -0,0 +1,29 @@
+/*
+ * 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;
+
+import org.openvpp.jvpp.dto.ControlPingReply;
+
+/**
+ * Represents callback for control_ping message.
+ */
+public interface ControlPingCallback extends JVppCallback {
+
+    void onControlPingReply(ControlPingReply reply);
+
+}
+
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/callback/JVppCallback.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/callback/JVppCallback.java
new file mode 100644
index 00000000000..f681e379bfd
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/callback/JVppCallback.java
@@ -0,0 +1,29 @@
+/*
+ * 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;
+import org.openvpp.jvpp.VppCallbackException;
+
+/**
+ * Base JVppCallback interface
+ */
+public interface JVppCallback {
+    /**
+     * onError callback handler used to report failing operation
+     * @param ex VppCallbackException object containing details about failing operation
+     */
+    void onError(VppCallbackException ex);
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/callback/JVppNotificationCallback.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/callback/JVppNotificationCallback.java
new file mode 100644
index 00000000000..72a75c83942
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/callback/JVppNotificationCallback.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.callback;
+
+/**
+* Notification callback
+*/
+public interface JVppNotificationCallback {
+
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/ControlPing.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/ControlPing.java
new file mode 100644
index 00000000000..cc59836dfa9
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/ControlPing.java
@@ -0,0 +1,34 @@
+/*
+ * 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;
+import org.openvpp.jvpp.VppInvocationException;
+
+/**
+ * Represents request DTO for control_ping message.
+ */
+public final class ControlPing implements JVppRequest {
+
+    @Override
+    public int send(final JVpp jvpp) throws VppInvocationException {
+        return jvpp.controlPing(this);
+    }
+
+}
+
+
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/ControlPingReply.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/ControlPingReply.java
new file mode 100644
index 00000000000..e7efd8595d6
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/ControlPingReply.java
@@ -0,0 +1,30 @@
+/*
+ * 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;
+
+/**
+ * Represents reply DTO for control_ping message.
+ */
+public final class ControlPingReply implements JVppReply<ControlPing> {
+
+    public int context;
+    public int clientIndex;
+    public int vpePid;
+
+
+}
+
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/JVppDump.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/JVppDump.java
new file mode 100644
index 00000000000..295bbba8525
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/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-registry/org/openvpp/jvpp/dto/JVppNotification.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/JVppNotification.java
new file mode 100644
index 00000000000..7d0fecb7d78
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/JVppNotification.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.dto;
+
+/**
+* Base interface for all notification DTOs
+*/
+public interface JVppNotification {
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/JVppReply.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/JVppReply.java
new file mode 100644
index 00000000000..2f4964c4de0
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/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-registry/org/openvpp/jvpp/dto/JVppReplyDump.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/JVppReplyDump.java
new file mode 100644
index 00000000000..4aecedc19d4
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/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-registry/org/openvpp/jvpp/dto/JVppRequest.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/JVppRequest.java
new file mode 100644
index 00000000000..1216edf8e31
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/dto/JVppRequest.java
@@ -0,0 +1,34 @@
+/*
+ * 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;
+import org.openvpp.jvpp.VppInvocationException;
+
+/**
+* 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 incoming response
+     */
+    int send(JVpp jvpp) throws VppInvocationException;
+
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/future/AbstractFutureJVppInvoker.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/future/AbstractFutureJVppInvoker.java
new file mode 100644
index 00000000000..d8b105f359e
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/future/AbstractFutureJVppInvoker.java
@@ -0,0 +1,120 @@
+/*
+ * 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.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import org.openvpp.jvpp.JVpp;
+import org.openvpp.jvpp.JVppRegistry;
+import org.openvpp.jvpp.VppInvocationException;
+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 abstract class AbstractFutureJVppInvoker implements FutureJVppInvoker {
+
+    private final JVpp jvpp;
+    private final JVppRegistry registry;
+
+    /**
+     * Guarded by self
+     */
+    private final Map<Integer, CompletableFuture<? extends JVppReply<?>>> requests;
+
+    protected AbstractFutureJVppInvoker(final JVpp jvpp, final JVppRegistry registry,
+                                     final Map<Integer, CompletableFuture<? extends JVppReply<?>>> requestMap) {
+        this.jvpp =  Objects.requireNonNull(jvpp, "jvpp should not be null");
+        this.registry =  Objects.requireNonNull(registry, "registry should not be null");
+        // Request map represents the shared state between this facade and it's callback
+        // where facade puts futures in and callback completes + removes them
+        this.requests = Objects.requireNonNull(requestMap, "Null requestMap");
+    }
+
+    protected final Map<Integer, CompletableFuture<? extends JVppReply<?>>> getRequests() {
+        return this.requests;
+    }
+
+    // TODO use Optional in Future, java8
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public <REQ extends JVppRequest, REPLY extends JVppReply<REQ>> CompletionStage<REPLY> send(REQ req) {
+        synchronized(requests) {
+            try {
+                final CompletableFuture<REPLY> replyCompletableFuture;
+                final int contextId = jvpp.send(req);
+
+                if(req instanceof JVppDump) {
+                    replyCompletableFuture = (CompletableFuture<REPLY>) new CompletableDumpFuture<>(contextId);
+                } else {
+                    replyCompletableFuture = new CompletableFuture<>();
+                }
+
+                requests.put(contextId, replyCompletableFuture);
+                if(req instanceof JVppDump) {
+                    requests.put(registry.controlPing(jvpp.getClass()), replyCompletableFuture);
+                }
+
+                // TODO in case of timeouts/missing replies, requests from the map are not removed
+                // consider adding cancel method, that would remove requests from the map and cancel
+                // associated replyCompletableFuture
+
+                return replyCompletableFuture;
+            } catch (VppInvocationException ex) {
+                final CompletableFuture<REPLY> replyCompletableFuture = new CompletableFuture<>();
+                replyCompletableFuture.completeExceptionally(ex);
+                return replyCompletableFuture;
+            }
+        }
+    }
+
+    public static final class CompletableDumpFuture<T extends JVppReplyDump<?, ?>> extends CompletableFuture<T> {
+        // 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 handled in the callback.
+        private T replyDump;
+        private final long contextId;
+
+        public CompletableDumpFuture(final long contextId) {
+            this.contextId = contextId;
+        }
+
+        public long getContextId() {
+            return contextId;
+        }
+
+        public T getReplyDump() {
+            return replyDump;
+        }
+
+        public void setReplyDump(final T replyDump) {
+            this.replyDump = replyDump;
+        }
+    }
+
+    @Override
+    public void close() throws Exception {
+        jvpp.close();
+    }
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/future/FutureJVppInvoker.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/future/FutureJVppInvoker.java
new file mode 100644
index 00000000000..1683bd75139
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/future/FutureJVppInvoker.java
@@ -0,0 +1,39 @@
+/*
+ * 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 org.openvpp.jvpp.dto.JVppReply;
+import org.openvpp.jvpp.dto.JVppRequest;
+
+import java.util.concurrent.CompletionStage;
+import org.openvpp.jvpp.notification.NotificationRegistryProvider;
+
+/**
+* Future facade on top of JVpp
+*/
+public interface FutureJVppInvoker extends NotificationRegistryProvider, AutoCloseable {
+
+    /**
+     * Invoke asynchronous operation on VPP
+     *
+     * @return CompletionStage with future result of an async VPP call
+     * @throws org.openvpp.jvpp.VppInvocationException when send request failed with details
+     */
+    <REQ extends JVppRequest, REPLY extends JVppReply<REQ>> CompletionStage<REPLY> send(REQ req);
+
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/notification/NotificationRegistry.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/notification/NotificationRegistry.java
new file mode 100644
index 00000000000..27349f2850a
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/notification/NotificationRegistry.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.notification;
+
+/**
+ * Base registry for notification callbacks.
+ */
+public interface NotificationRegistry extends AutoCloseable {
+
+    void close();
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/notification/NotificationRegistryProvider.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/notification/NotificationRegistryProvider.java
new file mode 100644
index 00000000000..46c534a0b31
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/notification/NotificationRegistryProvider.java
@@ -0,0 +1,28 @@
+/*
+ * 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.notification;
+
+/**
+ * Provides notification registry
+ */
+public interface NotificationRegistryProvider {
+
+    /**
+     * Get current notification registry instance
+     */
+    NotificationRegistry getNotificationRegistry();
+}
diff --git a/vpp-api/java/jvpp-registry/org/openvpp/jvpp/test/ConnectionTest.java b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/test/ConnectionTest.java
new file mode 100644
index 00000000000..d134a1c132a
--- /dev/null
+++ b/vpp-api/java/jvpp-registry/org/openvpp/jvpp/test/ConnectionTest.java
@@ -0,0 +1,43 @@
+/*
+ * 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.JVppRegistry;
+import org.openvpp.jvpp.JVppRegistryImpl;
+
+/**
+ * Run using:
+ * sudo java -cp build-vpp-native/vpp-api/java/jvpp-registry-16.09.jar org.openvpp.jvpp.test.ConnectionTest
+ */
+public class ConnectionTest {
+
+    private static void testConnect() throws Exception {
+        System.out.println("Testing JNI connection with JVppRegistry");
+        JVppRegistry registry = new JVppRegistryImpl("ConnectionTest");
+        System.out.println("Successfully connected to vpp");
+
+        Thread.sleep(5000);
+
+        System.out.println("Disconnecting...");
+        registry.close();
+        Thread.sleep(1000);
+    }
+
+    public static void main(String[] args) throws Exception {
+        testConnect();
+    }
+}