001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.zookeeper;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertTrue;
022
023import java.security.Permission;
024import org.apache.hadoop.conf.Configuration;
025import org.apache.hadoop.hbase.HBaseClassTestRule;
026import org.apache.hadoop.hbase.HBaseConfiguration;
027import org.apache.hadoop.hbase.HBaseZKTestingUtility;
028import org.apache.hadoop.hbase.HConstants;
029import org.apache.hadoop.hbase.testclassification.SmallTests;
030import org.apache.hadoop.hbase.testclassification.ZKTests;
031import org.junit.ClassRule;
032import org.junit.Test;
033import org.junit.experimental.categories.Category;
034
035@Category({ ZKTests.class, SmallTests.class })
036public class TestZKMainServer {
037
038  @ClassRule
039  public static final HBaseClassTestRule CLASS_RULE =
040      HBaseClassTestRule.forClass(TestZKMainServer.class);
041
042  // ZKMS calls System.exit.  Catch the call and prevent exit using trick described up in
043  // http://stackoverflow.com/questions/309396/java-how-to-test-methods-that-call-system-exit
044  protected static class ExitException extends SecurityException {
045    private static final long serialVersionUID = 1L;
046    private final int status;
047    public ExitException(int status) {
048      super("There is no escape!");
049      this.status = status;
050    }
051  }
052
053  private static class NoExitSecurityManager extends SecurityManager {
054    @Override
055    public void checkPermission(Permission perm) {
056      // allow anything.
057    }
058
059    @Override
060    public void checkPermission(Permission perm, Object context) {
061      // allow anything.
062    }
063
064    @Override
065    public void checkExit(int status) {
066      super.checkExit(status);
067      throw new ExitException(status);
068    }
069  }
070
071  /**
072   * We need delete of a znode to work at least.
073   */
074  @Test
075  public void testCommandLineWorks() throws Exception {
076    System.setSecurityManager(new NoExitSecurityManager());
077    HBaseZKTestingUtility htu = new HBaseZKTestingUtility();
078    // Make it long so for sure succeeds.
079    htu.getConfiguration().setInt(HConstants.ZK_SESSION_TIMEOUT, 30000);
080    htu.startMiniZKCluster();
081    try {
082      ZKWatcher zkw = htu.getZooKeeperWatcher();
083      String znode = "/testCommandLineWorks";
084      ZKUtil.createWithParents(zkw, znode, HConstants.EMPTY_BYTE_ARRAY);
085      ZKUtil.checkExists(zkw, znode);
086      boolean exception = false;
087      try {
088        ZKMainServer.main(new String [] {"-server",
089          "localhost:" + htu.getZkCluster().getClientPort(), "delete", znode});
090      } catch (ExitException ee) {
091        // ZKMS calls System.exit which should trigger this exception.
092        exception = true;
093      }
094      assertTrue(exception);
095      assertEquals(-1, ZKUtil.checkExists(zkw, znode));
096    } finally {
097      htu.shutdownMiniZKCluster();
098      System.setSecurityManager(null); // or save and restore original
099    }
100  }
101
102  @Test
103  public void testHostPortParse() {
104    ZKMainServer parser = new ZKMainServer();
105    Configuration c = HBaseConfiguration.create();
106    assertEquals("localhost:" + c.get(HConstants.ZOOKEEPER_CLIENT_PORT), parser.parse(c));
107    final String port = "1234";
108    c.set(HConstants.ZOOKEEPER_CLIENT_PORT, port);
109    c.set("hbase.zookeeper.quorum", "example.com");
110    assertEquals("example.com:" + port, parser.parse(c));
111    c.set("hbase.zookeeper.quorum", "example1.com,example2.com,example3.com");
112    String ensemble = parser.parse(c);
113    assertTrue(port, ensemble.matches("(example[1-3]\\.com:1234,){2}example[1-3]\\.com:" + port));
114
115    // multiple servers with its own port
116    c.set("hbase.zookeeper.quorum", "example1.com:5678,example2.com:9012,example3.com:3456");
117    ensemble = parser.parse(c);
118    assertEquals(ensemble, "example1.com:5678,example2.com:9012,example3.com:3456");
119
120    // some servers without its own port, which will be assigned the default client port
121    c.set("hbase.zookeeper.quorum", "example1.com:5678,example2.com:9012,example3.com");
122    ensemble = parser.parse(c);
123    assertEquals(ensemble, "example1.com:5678,example2.com:9012,example3.com:" + port);
124  }
125}