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/*
* 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 io.fd.vpp.jvpp;
import static java.util.Objects.requireNonNull;
import io.fd.vpp.jvpp.callback.ControlPingCallback;
import io.fd.vpp.jvpp.callback.JVppCallback;
import io.fd.vpp.jvpp.dto.ControlPingReply;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* 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 Map<String, JVppCallback> pluginRegistry;
private final ConcurrentMap<Integer, ControlPingCallback> pingCalls;
public JVppRegistryImpl(final String clientName) throws IOException {
connection = new VppJNIConnection(clientName);
connection.connect();
pluginRegistry = new HashMap<>();
pingCalls = new ConcurrentHashMap<>();
}
@Override
public VppConnection getConnection() {
return connection;
}
@Override
public synchronized 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.containsKey(name)) {
throw new IllegalArgumentException(
String.format("Callback for plugin %s was already registered", name));
}
jvpp.init(this, callback, connection.getConnectionInfo().queueAddress,
connection.getConnectionInfo().clientIndex);
pluginRegistry.put(name, callback);
}
@Override
public synchronized void unregister(final String name) {
requireNonNull(name, "Plugin name should not be null");
final JVppCallback previous = pluginRegistry.remove(name);
assertPluginWasRegistered(name, previous);
}
@Override
public synchronized 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 synchronized 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();
}
}
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