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#!/usr/bin/env python2
#
# Copyright (c) 2016,2018 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.
#
from string import Template
from jvpp_model import is_request, is_dump, is_event
def generate_java_impl(work_dir, model, logger):
logger.debug("Generating JVpp implementation for %s" % model.json_api_files)
messages = filter(_jvpp_impl_filter, model.messages)
plugin_package = model.plugin_package
methods = []
for msg in messages:
if msg.has_fields:
methods.append(_JVPP_IMPL_METHOD_TEMPLATE.substitute(
name=msg.java_name_lower,
plugin_package=plugin_package,
type=msg.java_name_upper))
else:
methods.append(_JVPP_IMPL_NO_ARG_METHOD_TEMPLATE.substitute(
name=msg.java_name_lower,
type=msg.java_name_upper))
plugin_name = model.plugin_java_name
jvpp_impl = _JVPP_IMPL_TEMPLATE.substitute(
plugin_package=plugin_package,
json_filename=model.json_api_files,
plugin_name=model.plugin_java_name,
plugin_name_underscore=model.plugin_name,
methods="\n".join(methods))
with open("%s/JVpp%sImpl.java" % (work_dir, plugin_name), "w") as f:
f.write(jvpp_impl)
def _jvpp_impl_filter(msg):
return is_request(msg) or is_dump(msg) or is_event(msg)
_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 java.util.logging.Level;
import io.fd.vpp.jvpp.callback.JVppCallback;
import io.fd.vpp.jvpp.VppConnection;
import io.fd.vpp.jvpp.JVppRegistry;
/**
* <p>Default implementation of JVpp interface.
* <br>It was generated by jvpp_impl_gen.py based on $json_filename.
* <br>(python representation of api file generated by vppapigen)
*/
public final class JVpp${plugin_name}Impl implements $plugin_package.JVpp${plugin_name} {
private final static Logger LOG = Logger.getLogger(JVpp${plugin_name}Impl.class.getName());
private static final java.lang.String LIBNAME = "libjvpp_${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${plugin_name}Impl.class.getResourceAsStream('/' + LIBNAME)) {
if (is == null) {
throw new IOException("Failed to open library resource " + LIBNAME);
}
loadStream(is);
}
}
private VppConnection connection;
private JVppRegistry registry;
private static native void init0(final JVppCallback callback, final long queueAddress, final int clientIndex);
@Override
public void init(final JVppRegistry registry, final JVppCallback callback, final long queueAddress, final int clientIndex) {
this.registry = java.util.Objects.requireNonNull(registry, "registry should not be null");
this.connection = java.util.Objects.requireNonNull(registry.getConnection(), "connection should not be null");
connection.checkActive();
init0(callback, queueAddress, clientIndex);
}
private static native void close0();
@Override
public void close() {
close0();
}
@Override
public int send(io.fd.vpp.jvpp.dto.JVppRequest request) throws io.fd.vpp.jvpp.VppInvocationException {
return request.send(this);
}
@Override
public final int controlPing(final io.fd.vpp.jvpp.dto.ControlPing controlPing) throws io.fd.vpp.jvpp.VppInvocationException {
return registry.controlPing(JVpp${plugin_name}Impl.class);
}
$methods
}
""")
_JVPP_IMPL_METHOD_TEMPLATE = Template("""
private static native int ${name}0($plugin_package.dto.$type request);
public final int $name($plugin_package.dto.$type request) throws io.fd.vpp.jvpp.VppInvocationException {
java.util.Objects.requireNonNull(request, "Null request object");
connection.checkActive();
if (LOG.isLoggable(Level.FINE)) {
LOG.fine(java.lang.String.format("Sending $type event message: %s", request));
}
int result=${name}0(request);
if (result<0){
throw new io.fd.vpp.jvpp.VppInvocationException("${name}", result);
}
return result;
}""")
_JVPP_IMPL_NO_ARG_METHOD_TEMPLATE = Template("""
private static native int ${name}0() throws io.fd.vpp.jvpp.VppInvocationException;
public final int $name() throws io.fd.vpp.jvpp.VppInvocationException {
connection.checkActive();
LOG.fine("Sending $type event message");
int result=${name}0();
if(result<0){
throw new io.fd.vpp.jvpp.VppInvocationException("${name}", result);
}
return result;
}""")
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