server/manager/src/test/java/org/apache/accumulo/manager/replication/ManagerReplicationCoordinatorTest.java

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 * 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
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 * Unless required by applicable law or agreed to in writing,
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package org.apache.accumulo.manager.replication;

import static org.junit.Assert.assertEquals;

import java.util.Collections;
import java.util.TreeSet;

import org.apache.accumulo.core.conf.AccumuloConfiguration;
import org.apache.accumulo.core.conf.DefaultConfiguration;
import org.apache.accumulo.core.metadata.TServerInstance;
import org.apache.accumulo.core.util.HostAndPort;
import org.apache.accumulo.fate.zookeeper.ZooReader;
import org.apache.accumulo.manager.Manager;
import org.apache.accumulo.server.ServerContext;
import org.easymock.EasyMock;
import org.junit.Test;

public class ManagerReplicationCoordinatorTest {

  static AccumuloConfiguration config = DefaultConfiguration.getInstance();

  @Test
  public void randomServer() {
    Manager manager = EasyMock.createMock(Manager.class);
    ZooReader reader = EasyMock.createMock(ZooReader.class);
    ServerContext context = EasyMock.createMock(ServerContext.class);
    EasyMock.expect(context.getConfiguration()).andReturn(config).anyTimes();
    EasyMock.expect(manager.getContext()).andReturn(context);
    EasyMock.expect(manager.getInstanceID()).andReturn("1234");
    EasyMock.replay(manager, reader);

    ManagerReplicationCoordinator coordinator = new ManagerReplicationCoordinator(manager, reader);
    TServerInstance inst1 = new TServerInstance(HostAndPort.fromParts("host1", 1234), "session");

    assertEquals(inst1, coordinator.getRandomTServer(Collections.singleton(inst1), 0));
  }

  @Test(expected = IllegalArgumentException.class)
  public void invalidOffset() {
    Manager manager = EasyMock.createMock(Manager.class);
    ServerContext context = EasyMock.createMock(ServerContext.class);
    EasyMock.expect(context.getConfiguration()).andReturn(config).anyTimes();
    ZooReader reader = EasyMock.createMock(ZooReader.class);
    EasyMock.expect(manager.getContext()).andReturn(context);
    EasyMock.expect(manager.getInstanceID()).andReturn("1234");
    EasyMock.replay(manager, reader);

    ManagerReplicationCoordinator coordinator = new ManagerReplicationCoordinator(manager, reader);
    TServerInstance inst1 = new TServerInstance(HostAndPort.fromParts("host1", 1234), "session");

    assertEquals(inst1, coordinator.getRandomTServer(Collections.singleton(inst1), 1));
  }

  @Test
  public void randomServerFromMany() {
    Manager manager = EasyMock.createMock(Manager.class);
    ZooReader reader = EasyMock.createMock(ZooReader.class);
    ServerContext context = EasyMock.createMock(ServerContext.class);
    EasyMock.expect(context.getConfiguration()).andReturn(config).anyTimes();
    EasyMock.expect(context.getInstanceID()).andReturn("1234").anyTimes();
    EasyMock.expect(context.getZooReaderWriter()).andReturn(null).anyTimes();
    EasyMock.expect(manager.getInstanceID()).andReturn("1234").anyTimes();
    EasyMock.expect(manager.getContext()).andReturn(context).anyTimes();
    EasyMock.replay(manager, context, reader);

    ManagerReplicationCoordinator coordinator = new ManagerReplicationCoordinator(manager, reader);

    EasyMock.verify(manager, reader);

    TreeSet<TServerInstance> instances = new TreeSet<>();
    TServerInstance inst1 = new TServerInstance(HostAndPort.fromParts("host1", 1234), "session");
    instances.add(inst1);
    TServerInstance inst2 = new TServerInstance(HostAndPort.fromParts("host2", 1234), "session");
    instances.add(inst2);

    assertEquals(inst1, coordinator.getRandomTServer(instances, 0));
    assertEquals(inst2, coordinator.getRandomTServer(instances, 1));
  }
}