/* 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 org.apache.zookeeper.test;
import java.nio.ByteBuffer;
import org.apache.zookeeper.server.quorum.QuorumPeer;
import org.apache.zookeeper.server.quorum.Vote;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.junit.Assert;
import org.apache.zookeeper.server.quorum.QuorumPeer.ServerState;
public class FLETestUtils {
protected static final Logger LOG = LoggerFactory.getLogger(FLETestUtils.class);
/*
* Thread to run an instance of leader election for
* a given quorum peer.
*/
static class LEThread extends Thread {
private int i;
private QuorumPeer peer;
LEThread(QuorumPeer peer, int i) {
this.i = i;
this.peer = peer;
LOG.info("Constructor: " + getName());
}
public void run(){
try{
Vote v = null;
peer.setPeerState(ServerState.LOOKING);
LOG.info("Going to call leader election: " + i);
v = peer.getElectionAlg().lookForLeader();
if (v == null){
Assert.fail("Thread " + i + " got a null vote");
}
/*
* A real zookeeper would take care of setting the current vote. Here
* we do it manually.
*/
peer.setCurrentVote(v);
LOG.info("Finished election: " + i + ", " + v.getId());
Assert.assertTrue("State is not leading.", peer.getPeerState() == ServerState.LEADING);
} catch (Exception e) {
e.printStackTrace();
}
LOG.info("Joining");
}
}
/*
* Creates a leader election notification message.
*/
static ByteBuffer createMsg(int state, long leader, long zxid, long epoch){
byte requestBytes[] = new byte[28];
ByteBuffer requestBuffer = ByteBuffer.wrap(requestBytes);
/*
* Building notification packet to send
*/
requestBuffer.clear();
requestBuffer.putInt(state);
requestBuffer.putLong(leader);
requestBuffer.putLong(zxid);
requestBuffer.putLong(epoch);
return requestBuffer;
}
}