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/*
* 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 static org.junit.Assert.fail;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.zookeeper.KeeperException.SessionExpiredException;
import org.apache.zookeeper.ZKTestCase;
import org.apache.zookeeper.server.SessionTracker.Session;
import org.apache.zookeeper.server.SessionTracker.SessionExpirer;
import org.apache.zookeeper.server.ZooKeeperServerListener;
import org.apache.zookeeper.server.quorum.LeaderSessionTracker;
import org.apache.zookeeper.server.quorum.LearnerSessionTracker;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Validate various type of sessions against leader session tracker and learner
* session tracker
*/
public class SessionTrackerCheckTest extends ZKTestCase {
protected static final Logger LOG = LoggerFactory.getLogger(SessionTrackerCheckTest.class);
public static final int TICK_TIME = 1000;
public static final int CONNECTION_TIMEOUT = TICK_TIME * 10;
private ConcurrentHashMap<Long, Integer> sessionsWithTimeouts = new ConcurrentHashMap<Long, Integer>();
private class Expirer implements SessionExpirer {
long sid;
public Expirer(long sid) {
this.sid = sid;
}
public void expire(Session session) {
}
public long getServerId() {
return sid;
}
}
@Before
public void setUp() throws Exception {
sessionsWithTimeouts.clear();
}
@After
public void tearDown() throws Exception {
}
@Test
public void testLearnerSessionTracker() throws Exception {
Expirer expirer = new Expirer(1);
// With local session on
LearnerSessionTracker tracker = new LearnerSessionTracker(expirer, sessionsWithTimeouts, TICK_TIME, expirer.sid, true, testZKSListener());
// Unknown session
long sessionId = 0xb100ded;
try {
tracker.checkSession(sessionId, null);
fail("Unknown session should have failed");
} catch (SessionExpiredException e) {
// Get expected exception
}
// Global session
sessionsWithTimeouts.put(sessionId, CONNECTION_TIMEOUT);
try {
tracker.checkSession(sessionId, null);
} catch (Exception e) {
fail("Global session should not fail");
}
// Local session
sessionId = tracker.createSession(CONNECTION_TIMEOUT);
try {
tracker.checkSession(sessionId, null);
} catch (Exception e) {
fail("Local session should not fail");
}
// During session upgrade
sessionsWithTimeouts.put(sessionId, CONNECTION_TIMEOUT);
try {
tracker.checkSession(sessionId, null);
} catch (Exception e) {
fail("Session during upgrade should not fail");
}
// With local session off
tracker = new LearnerSessionTracker(expirer, sessionsWithTimeouts, TICK_TIME, expirer.sid, false, testZKSListener());
// Should be noop
sessionId = 0xdeadbeef;
try {
tracker.checkSession(sessionId, null);
} catch (Exception e) {
fail("Should not get any exception");
}
}
@Test
public void testLeaderSessionTracker() throws Exception {
Expirer expirer = new Expirer(2);
// With local session on
LeaderSessionTracker tracker = new LeaderSessionTracker(expirer, sessionsWithTimeouts, TICK_TIME, expirer.sid, true, testZKSListener());
// Local session from other server
long sessionId = ((expirer.sid + 1) << 56) + 1;
try {
tracker.checkSession(sessionId, null);
} catch (Exception e) {
fail("local session from other server should not fail");
}
// Track global session
tracker.trackSession(sessionId, CONNECTION_TIMEOUT);
try {
tracker.checkSession(sessionId, null);
} catch (Exception e) {
fail("Global session should not fail");
}
try {
tracker.checkGlobalSession(sessionId, null);
} catch (Exception e) {
fail("Global session should not fail " + e);
}
// Local session from the leader
sessionId = tracker.createSession(CONNECTION_TIMEOUT);
try {
tracker.checkSession(sessionId, null);
} catch (Exception e) {
fail("Local session on the leader should not fail");
}
// During session upgrade
tracker.trackSession(sessionId, CONNECTION_TIMEOUT);
try {
tracker.checkSession(sessionId, null);
} catch (Exception e) {
fail("Session during upgrade should not fail");
}
try {
tracker.checkGlobalSession(sessionId, null);
} catch (Exception e) {
fail("Global session should not fail " + e);
}
// With local session off
tracker = new LeaderSessionTracker(expirer, sessionsWithTimeouts, TICK_TIME, expirer.sid, false, testZKSListener());
// Global session
sessionId = 0xdeadbeef;
tracker.trackSession(sessionId, CONNECTION_TIMEOUT);
try {
tracker.checkSession(sessionId, null);
} catch (Exception e) {
fail("Global session should not fail");
}
try {
tracker.checkGlobalSession(sessionId, null);
} catch (Exception e) {
fail("Global session should not fail");
}
// Local session from other server
sessionId = ((expirer.sid + 1) << 56) + 2;
try {
tracker.checkSession(sessionId, null);
fail("local session from other server should fail");
} catch (SessionExpiredException e) {
// Got expected exception
}
// Local session from the leader
sessionId = ((expirer.sid) << 56) + 2;
try {
tracker.checkSession(sessionId, null);
fail("local session from the leader should fail");
} catch (SessionExpiredException e) {
// Got expected exception
}
}
ZooKeeperServerListener testZKSListener() {
return new ZooKeeperServerListener() {
@Override
public void notifyStopping(String errMsg, int exitCode) {
}
};
}
}
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