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/*
* Copyright (c) 2019 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.jvpp.stats;
import io.fd.jvpp.JVpp;
import io.fd.jvpp.JVppRegistry;
import io.fd.jvpp.VppInvocationException;
import io.fd.jvpp.callback.JVppCallback;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import static java.util.Objects.requireNonNull;
/**
* Stats implementation of JVppRegistry.
*/
public final class JVppStatsRegistryImpl implements JVppRegistry {
private final VppStatsJNIConnection connection;
// Unguarded concurrent map, no race conditions expected on top of that
private final Map<String, JVppCallback> pluginRegistry;
public JVppStatsRegistryImpl(final String clientName) throws IOException {
connection = new VppStatsJNIConnection(clientName);
connection.connect();
pluginRegistry = new ConcurrentHashMap<>();
}
@Override
public VppStatsJNIConnection 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.containsKey(name)) {
throw new IllegalArgumentException(
String.format("Callback for plugin %s was already registered", name));
}
jvpp.init(this, callback, connection.getStatsConnectionInfo().queueAddress,
connection.getStatsConnectionInfo().clientIndex);
pluginRegistry.put(name, callback);
}
@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(Class<? extends JVpp> clazz) throws VppInvocationException {
return controlPing0();
}
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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