org.apache.hadoop.hbase.client.TestZKAsyncRegistry.java Source code

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Here is the source code for org.apache.hadoop.hbase.client.TestZKAsyncRegistry.java

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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.hadoop.hbase.client;

import static org.apache.hadoop.hbase.HConstants.META_REPLICAS_NUM;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.stream.IntStream;

import org.apache.commons.io.IOUtils;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.Waiter.ExplainingPredicate;
import org.apache.hadoop.hbase.testclassification.ClientTests;
import org.apache.hadoop.hbase.testclassification.MediumTests;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;

@Category({ MediumTests.class, ClientTests.class })
public class TestZKAsyncRegistry {

    private static final HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();

    private static ZKAsyncRegistry REGISTRY;

    // waits for all replicas to have region location
    static void waitUntilAllReplicasHavingRegionLocation(TableName tbl) throws IOException {
        TEST_UTIL.waitFor(TEST_UTIL.getConfiguration().getLong("hbase.client.sync.wait.timeout.msec", 60000), 200,
                true, new ExplainingPredicate<IOException>() {
                    @Override
                    public String explainFailure() throws IOException {
                        return TEST_UTIL.explainTableAvailability(tbl);
                    }

                    @Override
                    public boolean evaluate() throws IOException {
                        AtomicBoolean ready = new AtomicBoolean(true);
                        try {
                            RegionLocations locs = REGISTRY.getMetaRegionLocation().get();
                            assertEquals(3, locs.getRegionLocations().length);
                            IntStream.range(0, 3).forEach(i -> {
                                HRegionLocation loc = locs.getRegionLocation(i);
                                if (loc == null) {
                                    ready.set(false);
                                }
                            });
                        } catch (Exception e) {
                            ready.set(false);
                        }
                        return ready.get();
                    }
                });
    }

    @BeforeClass
    public static void setUp() throws Exception {
        TEST_UTIL.getConfiguration().setInt(META_REPLICAS_NUM, 3);
        TEST_UTIL.startMiniCluster(3);
        REGISTRY = new ZKAsyncRegistry(TEST_UTIL.getConfiguration());
    }

    @AfterClass
    public static void tearDown() throws Exception {
        IOUtils.closeQuietly(REGISTRY);
        TEST_UTIL.shutdownMiniCluster();
    }

    @Test
    public void test() throws InterruptedException, ExecutionException, IOException {
        assertEquals(TEST_UTIL.getHBaseCluster().getClusterStatus().getClusterId(), REGISTRY.getClusterId().get());
        assertEquals(TEST_UTIL.getHBaseCluster().getClusterStatus().getServersSize(),
                REGISTRY.getCurrentNrHRS().get().intValue());
        assertEquals(TEST_UTIL.getHBaseCluster().getMaster().getServerName(), REGISTRY.getMasterAddress().get());
        assertEquals(-1, REGISTRY.getMasterInfoPort().get().intValue());
        waitUntilAllReplicasHavingRegionLocation(TableName.META_TABLE_NAME);
        RegionLocations locs = REGISTRY.getMetaRegionLocation().get();
        assertEquals(3, locs.getRegionLocations().length);
        IntStream.range(0, 3).forEach(i -> {
            HRegionLocation loc = locs.getRegionLocation(i);
            assertNotNull("Replica " + i + " doesn't have location", loc);
            assertTrue(loc.getRegionInfo().getTable().equals(TableName.META_TABLE_NAME));
            assertEquals(i, loc.getRegionInfo().getReplicaId());
        });
    }
}