org.glowroot.container.impl.SocketHeartbeat Maven / Gradle / Ivy
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/*
* Copyright 2012-2014 the original author or authors.
*
* 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 org.glowroot.container.impl;
import java.io.IOException;
import java.io.ObjectOutputStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class SocketHeartbeat implements Runnable {
public static final String PING_COMMAND = "PING";
private static final Logger logger = LoggerFactory.getLogger(SocketHeartbeat.class);
private final ObjectOutputStream objectOut;
SocketHeartbeat(ObjectOutputStream objectOut) {
this.objectOut = objectOut;
}
@Override
public void run() {
while (true) {
// sychronizing with SocketCommandProcessor
synchronized (objectOut) {
try {
objectOut.writeObject(PING_COMMAND);
} catch (IOException e) {
// the test jvm has been terminated
System.exit(0);
}
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
logger.error(e.getMessage(), e);
return;
}
}
}
}