/**
* 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.io.ByteArrayInputStream;
import java.io.File;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Properties;
import java.util.Random;
import junit.framework.TestCase;
import org.apache.log4j.Logger;
import org.apache.zookeeper.server.quorum.FastLeaderElection;
import org.apache.zookeeper.server.quorum.QuorumPeer;
import org.apache.zookeeper.server.quorum.Vote;
import org.apache.zookeeper.server.quorum.QuorumPeer.QuorumServer;
import org.apache.zookeeper.server.quorum.QuorumPeer.ServerState;
import org.apache.zookeeper.server.quorum.flexible.QuorumHierarchical;
import org.junit.Before;
import org.junit.Test;
public class FLEZeroWeightTest extends TestCase {
private static final Logger LOG = Logger.getLogger(HierarchicalQuorumTest.class);
Properties qp;
int count;
HashMap<Long,QuorumServer> peers;
ArrayList<LEThread> threads;
File tmpdir[];
int port[];
int baseport, baseLEport;
Object finalObj;
volatile Vote votes[];
volatile boolean leaderDies;
volatile long leader = -1;
Random rand = new Random();
@Before
@Override
protected void setUp() throws Exception {
this.baseport = 10111;
this.baseLEport = 20111;
count = 9;
peers = new HashMap<Long,QuorumServer>(count);
threads = new ArrayList<LEThread>(count);
votes = new Vote[count];
tmpdir = new File[count];
port = new int[count];
finalObj = new Object();
String config = "group.1=0:1:2\n" +
"group.2=3:4:5\n" +
"group.3=6:7:8\n" +
"weight.0=1\n" +
"weight.1=1\n" +
"weight.2=1\n" +
"weight.3=0\n" +
"weight.4=0\n" +
"weight.5=0\n" +
"weight.6=0\n" +
"weight.7=0\n" +
"weight.8=0";
ByteArrayInputStream is = new ByteArrayInputStream(config.getBytes());
this.qp = new Properties();
qp.load(is);
LOG.info("SetUp " + getName());
}
protected void tearDown() throws Exception {
for(int i = 0; i < threads.size(); i++) {
LEThread leThread = threads.get(i);
((FastLeaderElection) leThread.peer.getElectionAlg()).shutdown();
// shutdown() has to be explicitly called for every thread to
// make sure that resources are freed properly and all fixed network ports
// are available for other test cases
leThread.peer.shutdown();
}
LOG.info("FINISHED " + getName());
}
class LEThread extends Thread {
int i;
QuorumPeer peer;
boolean fail;
LEThread(QuorumPeer peer, int i) {
this.i = i;
this.peer = peer;
LOG.info("Constructor: " + getName());
}
public void run() {
try {
Vote v = null;
fail = false;
while(true){
//while(true) {
peer.setPeerState(ServerState.LOOKING);
LOG.info("Going to call leader election.");
v = peer.getElectionAlg().lookForLeader();
if(v == null){
LOG.info("Thread " + i + " got a null vote");
return;
}
/*
* 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.id);
votes[i] = v;
if((peer.getPeerState() == ServerState.LEADING) &&
(peer.getId() > 2)) fail = true;
if((peer.getPeerState() == ServerState.FOLLOWING) ||
(peer.getPeerState() == ServerState.LEADING)) break;
}
LOG.debug("Thread " + i + " votes " + v);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
@Test
public void testZeroWeightQuorum() throws Exception {
FastLeaderElection le[] = new FastLeaderElection[count];
LOG.info("TestZeroWeightQuorum: " + getName()+ ", " + count);
for(int i = 0; i < count; i++) {
peers.put(Long.valueOf(i),
new QuorumServer(i,
new InetSocketAddress(baseport +i ),
new InetSocketAddress(baseLEport + i)));
tmpdir[i] = ClientBase.createTmpDir();
port[i] = baseport + i;
}
for(int i = 0; i < le.length; i++) {
QuorumHierarchical hq = new QuorumHierarchical(qp);
QuorumPeer peer = new QuorumPeer(peers, tmpdir[i], tmpdir[i], port[i], 3, i, 2, 2, 2, hq);
peer.startLeaderElection();
LEThread thread = new LEThread(peer, i);
thread.start();
threads.add(thread);
}
LOG.info("Started threads " + getName());
for(int i = 0; i < threads.size(); i++) {
threads.get(i).join(15000);
if (threads.get(i).isAlive()) {
fail("Threads didn't join");
} else {
if(threads.get(i).fail)
fail("Elected zero-weight server");
}
}
}
}