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/*
* Copyright (c) 2019 PANTHEON.tech.
*
* 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 static io.fd.jvpp.NativeLibraryLoader.loadLibrary;
import static java.lang.String.format;
import io.fd.jvpp.stats.dto.InterfaceStatistics;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.LinkedList;
import java.util.logging.Level;
import java.util.logging.Logger;
public class JVppClientStatsImpl implements AutoCloseable {
private boolean connected;
private static final Logger LOG = Logger.getLogger(JVppClientStatsImpl.class.getName());
static {
final String libName = "libjvpp_stats.so";
try {
loadLibrary(libName, JVppClientStatsImpl.class);
} catch (IOException e) {
LOG.log(Level.SEVERE, format("Can't find vpp jni library: %s", libName), e);
throw new ExceptionInInitializerError(e);
}
}
private static native InterfaceStatistics[] interfaceStatisticsDump();
private static native int statSegmentConnect();
private static native void statSegmentDisconnect();
public synchronized List<InterfaceStatistics> getInterfaceStatistics() {
if (!this.connected) {
LOG.severe("Unable to dump statistics. Client isn't connected. Try reconnecting.");
return null;
}
InterfaceStatistics[] statDump = interfaceStatisticsDump();
List<InterfaceStatistics> statistics = new LinkedList();
if (statDump != null) {
statistics = Arrays.asList(statDump);
}
return statistics;
}
public JVppClientStatsImpl() {
connectClient();
}
public boolean reconnect() {
connectClient();
return this.connected;
}
private void connectClient() {
if (!this.connected) {
if (statSegmentConnect() == 0) {
this.connected = true;
}
}
}
public boolean isConnected() {
return connected;
}
public void close() {
if (this.connected) {
statSegmentDisconnect();
this.connected = false;
}
}
}
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