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.HBaseZKTestingUtil;
028import org.apache.hadoop.hbase.HConstants;
029import org.apache.hadoop.hbase.testclassification.SmallTests;
030import org.apache.hadoop.hbase.testclassification.ZKTests;
031import org.junit.Assert;
032import org.junit.ClassRule;
033import org.junit.Test;
034import org.junit.experimental.categories.Category;
035
036@Category({ ZKTests.class, SmallTests.class })
037public class TestZKMainServer {
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
047    ExitException() {
048      super("There is no escape!");
049    }
050  }
051
052  private static class NoExitSecurityManager extends SecurityManager {
053    @Override
054    public void checkPermission(Permission perm) {
055      // allow anything.
056    }
057
058    @Override
059    public void checkPermission(Permission perm, Object context) {
060      // allow anything.
061    }
062
063    @Override
064    public void checkExit(int status) {
065      super.checkExit(status);
066      throw new ExitException();
067    }
068  }
069
070  /**
071   * We need delete of a znode to work at least.
072   */
073  @Test
074  public void testCommandLineWorks() throws Exception {
075    System.setSecurityManager(new NoExitSecurityManager());
076    HBaseZKTestingUtil htu = new HBaseZKTestingUtil();
077    // Make it long so for sure succeeds.
078    htu.getConfiguration().setInt(HConstants.ZK_SESSION_TIMEOUT, 30000);
079    htu.startMiniZKCluster();
080    try {
081      ZKWatcher zkw = htu.getZooKeeperWatcher();
082      String znode = "/testCommandLineWorks";
083      ZKUtil.createWithParents(zkw, znode, HConstants.EMPTY_BYTE_ARRAY);
084      ZKUtil.checkExists(zkw, znode);
085      boolean exception = false;
086      try {
087        ZKMainServer.main(
088          new String[] { "-server", htu.getZkCluster().getAddress().toString(), "delete", znode });
089      } catch (ExitException ee) {
090        // ZKMS calls System.exit which should trigger this exception.
091        exception = true;
092      }
093      assertTrue(exception);
094      assertEquals(-1, ZKUtil.checkExists(zkw, znode));
095    } finally {
096      htu.shutdownMiniZKCluster();
097      System.setSecurityManager(null); // or save and restore original
098    }
099  }
100
101  @Test
102  public void testHostPortParse() {
103    ZKMainServer parser = new ZKMainServer();
104    Configuration c = HBaseConfiguration.create();
105    assertEquals("127.0.0.1:" + c.get(HConstants.ZOOKEEPER_CLIENT_PORT), parser.parse(c));
106    final String port = "1234";
107    c.set(HConstants.ZOOKEEPER_CLIENT_PORT, port);
108    c.set("hbase.zookeeper.quorum", "example.com");
109    assertEquals("example.com:" + port, parser.parse(c));
110    c.set("hbase.zookeeper.quorum", "example1.com,example2.com,example3.com");
111    String ensemble = parser.parse(c);
112    assertTrue(port, ensemble.matches("(example[1-3]\\.com:1234,){2}example[1-3]\\.com:" + port));
113
114    // multiple servers with its own port
115    c.set("hbase.zookeeper.quorum", "example1.com:5678,example2.com:9012,example3.com:3456");
116    ensemble = parser.parse(c);
117    assertEquals("example1.com:5678,example2.com:9012,example3.com:3456", ensemble);
118
119    // some servers without its own port, which will be assigned the default client port
120    c.set("hbase.zookeeper.quorum", "example1.com:5678,example2.com:9012,example3.com");
121    ensemble = parser.parse(c);
122    assertEquals(ensemble, "example1.com:5678,example2.com:9012,example3.com:" + port);
123
124    // multiple servers(IPv6) with its own port
125    c.set("hbase.zookeeper.quorum",
126      "[2001:db8:1::242:ac11:2]:2181," + "[2001:db8:1::242:ac11:3]:5678");
127    ensemble = parser.parse(c);
128    assertEquals("[2001:db8:1::242:ac11:2]:2181," + "[2001:db8:1::242:ac11:3]:5678", ensemble);
129
130    // some servers(IPv6) without its own port, which will be assigned the default client port
131    c.set("hbase.zookeeper.quorum",
132      "[1001:db8:1::242:ac11:8], [2001:db8:1::242:df23:2]:9876," + "[2001:db8:1::242:ac11:3]:5678");
133    ensemble = parser.parse(c);
134    assertEquals("[1001:db8:1::242:ac11:8]:1234, [2001:db8:1::242:df23:2]:9876,"
135      + "[2001:db8:1::242:ac11:3]:5678", ensemble);
136
137    // a bad case
138    try {
139      // some servers(IPv6) with an invaild Ipv6 address in it
140      c.set("hbase.zookeeper.quorum", "[1001:db8:1::242:ac11:8], [2001:db8:1::242:df23:2]:9876,"
141        + "[1001:db8:1::242:ac11:8:89:67]:5678");
142      parser.parse(c);
143      Assert.fail("IPv6 address should be 8 groups.");
144    } catch (IllegalArgumentException e) {
145      // expected
146    }
147  }
148}