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#!/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 $plugin_package;
/**
* <p>Java representation of plugin's api file.
* <br>It was generated by jvpp_impl_gen.py based on $inputfile
* <br>(python representation of api file generated by vppapigen).
*/
public interface JVpp${plugin_name} extends $base_package.JVpp {
/**
* Generic dispatch method for sending requests to VPP
*
* @throws io.fd.vpp.jvpp.VppInvocationException if send request had failed
*/
int send($base_package.$dto_package.JVppRequest request) throws io.fd.vpp.jvpp.VppInvocationException;
$methods
}
""")
jvpp_impl_template = Template("""
package $plugin_package;
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.Logger;
import $base_package.callback.JVppCallback;
import $base_package.VppConnection;
import $base_package.JVppRegistry;
/**
* <p>Default implementation of JVpp interface.
* <br>It was generated by jvpp_impl_gen.py based on $inputfile
* <br>(python representation of api file generated by vppapigen).
*/
public final class JVpp${plugin_name}Impl implements $plugin_package.JVpp${plugin_name} {
private final static Logger LOG = Logger.getLogger(JVpp${plugin_name}Impl.class.getName());
private static final String LIBNAME = "libjvpp_${plugin_name_underscore}.so";
// FIXME using NativeLibraryLoader makes load fail could not find (WantInterfaceEventsReply).
static {
try {
loadLibrary();
} catch (Exception e) {
LOG.severe("Can't find jvpp 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 = JVpp${plugin_name}Impl.class.getResourceAsStream('/' + LIBNAME)) {
if (is == null) {
throw new IOException("Failed to open library resource " + LIBNAME);
}
loadStream(is);
}
}
private VppConnection connection;
private JVppRegistry registry;
private static native void init0(final JVppCallback callback, final long queueAddress, final int clientIndex);
@Override
public void init(final JVppRegistry registry, final JVppCallback callback, final long queueAddress, final int clientIndex) {
this.registry = java.util.Objects.requireNonNull(registry, "registry should not be null");
this.connection = java.util.Objects.requireNonNull(registry.getConnection(), "connection should not be null");
connection.checkActive();
init0(callback, queueAddress, clientIndex);
}
private static native void close0();
@Override
public void close() {
close0();
}
@Override
public int send($base_package.$dto_package.JVppRequest request) throws io.fd.vpp.jvpp.VppInvocationException {
return request.send(this);
}
@Override
public final int controlPing(final io.fd.vpp.jvpp.dto.ControlPing controlPing) throws io.fd.vpp.jvpp.VppInvocationException {
return registry.controlPing(JVpp${plugin_name}Impl.class);
}
$methods
}
""")
method_template = Template(""" int $name($plugin_package.$dto_package.$request request) throws io.fd.vpp.jvpp.VppInvocationException;""")
method_native_template = Template(
""" private static native int ${name}0($plugin_package.$dto_package.$request request);""")
method_impl_template = Template(""" public final int $name($plugin_package.$dto_package.$request request) throws io.fd.vpp.jvpp.VppInvocationException {
java.util.Objects.requireNonNull(request,"Null request object");
connection.checkActive();
int result=${name}0(request);
if(result<0){
throw new io.fd.vpp.jvpp.VppInvocationException("${name}",result);
}
return result;
}
""")
no_arg_method_template = Template(""" int $name() throws io.fd.vpp.jvpp.VppInvocationException;""")
no_arg_method_native_template = Template(""" private static native int ${name}0() throws io.fd.vpp.jvpp.VppInvocationException;""")
no_arg_method_impl_template = Template(""" public final int $name() throws io.fd.vpp.jvpp.VppInvocationException {
connection.checkActive();
int result=${name}0();
if(result<0){
throw new io.fd.vpp.jvpp.VppInvocationException("${name}",result);
}
return result;
}
""")
def generate_jvpp(func_list, base_package, plugin_package, plugin_name_underscore, dto_package, inputfile):
""" Generates JVpp interface and JNI implementation """
print "Generating JVpp"
plugin_name = util.underscore_to_camelcase_upper(plugin_name_underscore)
methods = []
methods_impl = []
for func in func_list:
# Skip structures that are used only as notifications
if util.is_just_notification(func['name']) or util.is_ignored(func['name']):
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))
methods_impl.append(no_arg_method_native_template.substitute(name=camel_case_name))
methods_impl.append(no_arg_method_impl_template.substitute(name=camel_case_name))
else:
methods.append(method_template.substitute(name=camel_case_name,
request=camel_case_name_upper,
plugin_package=plugin_package,
dto_package=dto_package))
methods_impl.append(method_native_template.substitute(name=camel_case_name,
request=camel_case_name_upper,
plugin_package=plugin_package,
dto_package=dto_package))
methods_impl.append(method_impl_template.substitute(name=camel_case_name,
request=camel_case_name_upper,
plugin_package=plugin_package,
dto_package=dto_package))
jvpp_file = open("JVpp%s.java" % plugin_name, 'w')
jvpp_file.write(
jvpp_ifc_template.substitute(inputfile=inputfile,
methods="\n".join(methods),
base_package=base_package,
plugin_package=plugin_package,
plugin_name=plugin_name,
dto_package=dto_package))
jvpp_file.flush()
jvpp_file.close()
jvpp_file = open("JVpp%sImpl.java" % plugin_name, 'w')
jvpp_file.write(jvpp_impl_template.substitute(inputfile=inputfile,
methods="\n".join(methods_impl),
base_package=base_package,
plugin_package=plugin_package,
plugin_name=plugin_name,
plugin_name_underscore=plugin_name_underscore,
dto_package=dto_package))
jvpp_file.flush()
jvpp_file.close()
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