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.master.procedure;
019
020import static org.junit.Assert.assertEquals;
021
022import java.io.IOException;
023import org.apache.hadoop.conf.Configuration;
024import org.apache.hadoop.fs.Path;
025import org.apache.hadoop.hbase.HBaseClassTestRule;
026import org.apache.hadoop.hbase.HBaseTestingUtil;
027import org.apache.hadoop.hbase.TableName;
028import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
029import org.apache.hadoop.hbase.client.RegionInfo;
030import org.apache.hadoop.hbase.client.RegionInfoBuilder;
031import org.apache.hadoop.hbase.client.TableDescriptor;
032import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
033import org.apache.hadoop.hbase.master.HMaster;
034import org.apache.hadoop.hbase.procedure2.Procedure;
035import org.apache.hadoop.hbase.procedure2.ProcedureEvent;
036import org.apache.hadoop.hbase.procedure2.ProcedureExecutor;
037import org.apache.hadoop.hbase.procedure2.ProcedureTestingUtility;
038import org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore;
039import org.apache.hadoop.hbase.testclassification.MasterTests;
040import org.apache.hadoop.hbase.testclassification.MediumTests;
041import org.apache.hadoop.hbase.util.CommonFSUtils;
042import org.junit.After;
043import org.junit.AfterClass;
044import org.junit.BeforeClass;
045import org.junit.ClassRule;
046import org.junit.Rule;
047import org.junit.Test;
048import org.junit.experimental.categories.Category;
049import org.junit.rules.TestName;
050import org.slf4j.Logger;
051import org.slf4j.LoggerFactory;
052
053@Category({ MasterTests.class, MediumTests.class })
054public class TestMasterProcedureEvents {
055
056  @ClassRule
057  public static final HBaseClassTestRule CLASS_RULE =
058    HBaseClassTestRule.forClass(TestMasterProcedureEvents.class);
059
060  private static final Logger LOG = LoggerFactory.getLogger(TestCreateTableProcedure.class);
061
062  protected static final HBaseTestingUtil UTIL = new HBaseTestingUtil();
063
064  @Rule
065  public TestName name = new TestName();
066
067  private static void setupConf(Configuration conf) throws IOException {
068    conf.setInt(MasterProcedureConstants.MASTER_PROCEDURE_THREADS, 1);
069    conf.setBoolean(WALProcedureStore.USE_HSYNC_CONF_KEY, false);
070  }
071
072  @BeforeClass
073  public static void setupCluster() throws Exception {
074    Configuration conf = UTIL.getConfiguration();
075    setupConf(UTIL.getConfiguration());
076    UTIL.startMiniDFSCluster(3);
077    CommonFSUtils.setWALRootDir(conf, new Path(conf.get("fs.defaultFS"), "/tmp/wal"));
078    UTIL.startMiniCluster(2);
079    UTIL.waitUntilNoRegionsInTransition();
080  }
081
082  @AfterClass
083  public static void cleanupTest() throws Exception {
084    try {
085      UTIL.shutdownMiniCluster();
086    } catch (Exception e) {
087      LOG.warn("failure shutting down cluster", e);
088    }
089  }
090
091  @After
092  public void tearDown() throws Exception {
093    for (TableDescriptor htd : UTIL.getAdmin().listTableDescriptors()) {
094      LOG.info("Tear down, remove table=" + htd.getTableName());
095      UTIL.deleteTable(htd.getTableName());
096    }
097  }
098
099  @Test
100  public void testMasterInitializedEvent() throws Exception {
101    final TableName tableName = TableName.valueOf(name.getMethodName());
102    HMaster master = UTIL.getMiniHBaseCluster().getMaster();
103    ProcedureExecutor<MasterProcedureEnv> procExec = master.getMasterProcedureExecutor();
104
105    RegionInfo hri = RegionInfoBuilder.newBuilder(tableName).build();
106    TableDescriptor htd = TableDescriptorBuilder.newBuilder(tableName)
107      .setColumnFamily(ColumnFamilyDescriptorBuilder.of("f")).build();
108
109    while (!master.isInitialized()) {
110      Thread.sleep(250);
111    }
112    master.setInitialized(false); // fake it, set back later
113
114    // check event wait/wake
115    testProcedureEventWaitWake(master, master.getInitializedEvent(),
116      new CreateTableProcedure(procExec.getEnvironment(), htd, new RegionInfo[] { hri }));
117  }
118
119  private void testProcedureEventWaitWake(final HMaster master, final ProcedureEvent<?> event,
120    final Procedure<MasterProcedureEnv> proc) throws Exception {
121    final ProcedureExecutor<MasterProcedureEnv> procExec = master.getMasterProcedureExecutor();
122    final MasterProcedureScheduler procSched = procExec.getEnvironment().getProcedureScheduler();
123
124    final long startPollCalls = procSched.getPollCalls();
125    final long startNullPollCalls = procSched.getNullPollCalls();
126
127    // check that nothing is in the event queue
128    LOG.debug("checking " + event);
129    assertEquals(false, event.isReady());
130    assertEquals(0, event.getSuspendedProcedures().size());
131
132    // submit the procedure
133    LOG.debug("submit " + proc);
134    long procId = procExec.submitProcedure(proc);
135
136    // wait until the event is in the queue (proc executed and got into suspended state)
137    LOG.debug("wait procedure suspended on " + event);
138    while (event.getSuspendedProcedures().size() < 1)
139      Thread.sleep(25);
140
141    // check that the proc is in the event queue
142    LOG.debug("checking " + event + " size=" + event.getSuspendedProcedures().size());
143    assertEquals(false, event.isReady());
144    assertEquals(1, event.getSuspendedProcedures().size());
145
146    // wake the event
147    LOG.debug("wake " + event);
148    event.wake(procSched);
149    assertEquals(true, event.isReady());
150
151    // wait until proc completes
152    LOG.debug("waiting " + proc);
153    ProcedureTestingUtility.waitProcedure(procExec, procId);
154
155    // check that nothing is in the event queue and the event is not suspended
156    assertEquals(true, event.isReady());
157    assertEquals(0, event.getSuspendedProcedures().size());
158    LOG.debug(
159      "completed execution of " + proc + " pollCalls=" + (procSched.getPollCalls() - startPollCalls)
160        + " nullPollCalls=" + (procSched.getNullPollCalls() - startNullPollCalls));
161  }
162}