// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 com.cloud.agent.manager;
import org.apache.log4j.Logger;
import com.cloud.agent.Listener;
import com.cloud.agent.api.AgentControlAnswer;
import com.cloud.agent.api.AgentControlCommand;
import com.cloud.agent.api.Answer;
import com.cloud.agent.api.Command;
import com.cloud.agent.api.StartupCommand;
import com.cloud.host.HostVO;
import com.cloud.host.Status;
import com.cloud.utils.Profiler;
public class SynchronousListener implements Listener {
private static final Logger s_logger = Logger.getLogger(SynchronousListener.class);
protected Answer[] _answers;
protected boolean _disconnected;
protected String _peer;
public SynchronousListener(Listener listener) {
_answers = null;
_peer = null;
}
public void setPeer(String peer) {
_peer = peer;
}
public String getPeer() {
return _peer;
}
public Answer[] getAnswers() {
return _answers;
}
@Override
public boolean isRecurring() {
return false;
}
public boolean isDisconnected() {
return _disconnected;
}
@Override
public synchronized boolean processAnswers(long agentId, long seq, Answer[] resp) {
_answers = resp;
notifyAll();
return true;
}
@Override
public synchronized boolean processDisconnect(long agentId, Status state) {
if(s_logger.isTraceEnabled())
s_logger.trace("Agent disconnected, agent id: " + agentId + ", state: " + state + ". Will notify waiters");
_disconnected = true;
notifyAll();
return true;
}
@Override
public void processConnect(HostVO agent, StartupCommand cmd, boolean forRebalance) {
}
@Override
public boolean processCommands(long agentId, long seq, Command[] req) {
return false;
}
@Override
public AgentControlAnswer processControlCommand(long agentId, AgentControlCommand cmd) {
return null;
}
public Answer[] waitFor() throws InterruptedException {
return waitFor(-1);
}
public synchronized Answer[] waitFor(int s) throws InterruptedException {
if (_disconnected) {
return null;
}
if (_answers != null) {
return _answers;
}
Profiler profiler = new Profiler();
profiler.start();
if (s <= 0) {
wait();
} else {
int ms = s * 1000;
wait(ms);
}
profiler.stop();
if(s_logger.isTraceEnabled()) {
s_logger.trace("Synchronized command - sending completed, time: " + profiler.getDuration() + ", answer: " +
(_answers != null ? _answers[0].toString() : "null"));
}
return _answers;
}
@Override
public boolean processTimeout(long agentId, long seq) {
return true;
}
@Override
public int getTimeout() {
return -1;
}
}