import org.apache.hadoop.hbase.util.MockRegionServerServices; //导入依赖的package包/类
@Test
public void testFailedOpenRegion() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = new MockRegionServerServices();

  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());
  ZKAssign.transitionNodeOpening(server.getZooKeeper(), TEST_HRI, server.getServerName());

  // Create the handler
  OpenRegionHandler handler =
    new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD) {
      @Override
      HRegion openRegion() {
        // Fake failure of opening a region due to an IOE, which is caught
        return null;
      }
  };
  handler.process();

  // Handler should have transitioned it to FAILED_OPEN
  RegionTransitionData data =
    ZKAssign.getData(server.getZooKeeper(), TEST_HRI.getEncodedName());
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, data.getEventType());
}
 

import org.apache.hadoop.hbase.util.MockRegionServerServices; //导入依赖的package包/类
@Test
public void testFailedUpdateMeta() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = new MockRegionServerServices();

  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());
  ZKAssign.transitionNodeOpening(server.getZooKeeper(), TEST_HRI, server.getServerName());
  // Create the handler
  OpenRegionHandler handler =
    new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD) {
      @Override
      boolean updateMeta(final HRegion r) {
        // Fake failure of updating META
        return false;
      }
  };
  handler.process();

  // Handler should have transitioned it to FAILED_OPEN
  RegionTransitionData data =
    ZKAssign.getData(server.getZooKeeper(), TEST_HRI.getEncodedName());
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, data.getEventType());
}
 

import org.apache.hadoop.hbase.util.MockRegionServerServices; //导入依赖的package包/类
@Test
public void testFailedOpenRegion() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = new MockRegionServerServices();

  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());

  // Create the handler
  OpenRegionHandler handler =
    new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD) {
      @Override
      HRegion openRegion() {
        // Fake failure of opening a region due to an IOE, which is caught
        return null;
      }
  };
  rsServices.getRegionsInTransitionInRS().put(
    TEST_HRI.getEncodedNameAsBytes(), Boolean.TRUE);
  handler.process();

  // Handler should have transitioned it to FAILED_OPEN
  RegionTransition rt = RegionTransition.parseFrom(
    ZKAssign.getData(server.getZooKeeper(), TEST_HRI.getEncodedName()));
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, rt.getEventType());
}
 

import org.apache.hadoop.hbase.util.MockRegionServerServices; //导入依赖的package包/类
@Test
public void testFailedUpdateMeta() throws Exception {
  Server server = new MockServer(HTU);
  RegionServerServices rsServices = new MockRegionServerServices();

  // Create it OFFLINE, which is what it expects
  ZKAssign.createNodeOffline(server.getZooKeeper(), TEST_HRI, server.getServerName());

  // Create the handler
  OpenRegionHandler handler =
    new OpenRegionHandler(server, rsServices, TEST_HRI, TEST_HTD) {
      @Override
      boolean updateMeta(final HRegion r) {
        // Fake failure of updating META
        return false;
      }
  };
  rsServices.getRegionsInTransitionInRS().put(
    TEST_HRI.getEncodedNameAsBytes(), Boolean.TRUE);
  handler.process();

  // Handler should have transitioned it to FAILED_OPEN
  RegionTransition rt = RegionTransition.parseFrom(
    ZKAssign.getData(server.getZooKeeper(), TEST_HRI.getEncodedName()));
  assertEquals(EventType.RS_ZK_REGION_FAILED_OPEN, rt.getEventType());
}
 

import org.apache.hadoop.hbase.util.MockRegionServerServices; //导入依赖的package包/类
/**
 * Test that if we fail a flush, abort gets set on close.
 * @see <a href="https://issues.apache.org/jira/browse/HBASE-4270">HBASE-4270</a>
 * @throws IOException
 * @throws NodeExistsException
 * @throws KeeperException
 */
@Test public void testFailedFlushAborts()
throws IOException, NodeExistsException, KeeperException {
  final Server server = new MockServer(HTU, false);
  final RegionServerServices rss = new MockRegionServerServices();
  HTableDescriptor htd = TEST_HTD;
  final HRegionInfo hri =
    new HRegionInfo(htd.getName(), HConstants.EMPTY_END_ROW,
      HConstants.EMPTY_END_ROW);
  HRegion region =
    HRegion.createHRegion(hri, HTU.getDataTestDir(),
      HTU.getConfiguration(), htd);
  try {
    assertNotNull(region);
    // Spy on the region so can throw exception when close is called.
    HRegion spy = Mockito.spy(region);
    final boolean abort = false;
    Mockito.when(spy.close(abort)).
    thenThrow(new RuntimeException("Mocked failed close!"));
    // The CloseRegionHandler will try to get an HRegion that corresponds
    // to the passed hri -- so insert the region into the online region Set.
    rss.addToOnlineRegions(spy);
    // Assert the Server is NOT stopped before we call close region.
    assertFalse(server.isStopped());
    CloseRegionHandler handler =
        new CloseRegionHandler(server, rss, hri, false, false, -1);
    boolean throwable = false;
    try {
      handler.process();
    } catch (Throwable t) {
      throwable = true;
    } finally {
      assertTrue(throwable);
      // Abort calls stop so stopped flag should be set.
      assertTrue(server.isStopped());
    }
  } finally {
    HRegion.closeHRegion(region);
  }
}
 

import org.apache.hadoop.hbase.util.MockRegionServerServices; //导入依赖的package包/类
/**
 * Test if close region can handle ZK closing node version mismatch
 * @throws IOException
 * @throws NodeExistsException
 * @throws KeeperException
 */
@Test public void testZKClosingNodeVersionMismatch()
throws IOException, NodeExistsException, KeeperException {
  final Server server = new MockServer(HTU);
  final MockRegionServerServices rss = new MockRegionServerServices();
  rss.setFileSystem(HTU.getTestFileSystem());
   
  HTableDescriptor htd = TEST_HTD;
  final HRegionInfo hri = TEST_HRI;
   
  // open a region first so that it can be closed later
  OpenRegion(server, rss, htd, hri);
   
  // close the region
  // Create it CLOSING, which is what Master set before sending CLOSE RPC
  int versionOfClosingNode = ZKAssign.createNodeClosing(server.getZooKeeper(),
    hri, server.getServerName());
   
  // The CloseRegionHandler will validate the expected version
  // Given it is set to invalid versionOfClosingNode+1,
  // CloseRegionHandler should be M_ZK_REGION_CLOSING
  CloseRegionHandler handler =
    new CloseRegionHandler(server, rss, hri, false, true,
    versionOfClosingNode+1);
  handler.process();
   
  // Handler should remain in M_ZK_REGION_CLOSING
  RegionTransitionData data =
    ZKAssign.getData(server.getZooKeeper(), hri.getEncodedName());
  assertTrue(EventType.M_ZK_REGION_CLOSING == data.getEventType());
}
 

import org.apache.hadoop.hbase.util.MockRegionServerServices; //导入依赖的package包/类
/**
 * Test if the region can be closed properly
 * @throws IOException
 * @throws NodeExistsException
 * @throws KeeperException
 */
@Test public void testCloseRegion()
throws IOException, NodeExistsException, KeeperException {
  final Server server = new MockServer(HTU);
  final MockRegionServerServices rss = new MockRegionServerServices();
  rss.setFileSystem(HTU.getTestFileSystem());
   
  HTableDescriptor htd = TEST_HTD;
  HRegionInfo hri = TEST_HRI;
   
  // open a region first so that it can be closed later
  OpenRegion(server, rss, htd, hri);
   
  // close the region
  // Create it CLOSING, which is what Master set before sending CLOSE RPC
  int versionOfClosingNode = ZKAssign.createNodeClosing(server.getZooKeeper(),
    hri, server.getServerName());
   
  // The CloseRegionHandler will validate the expected version
  // Given it is set to correct versionOfClosingNode,
  // CloseRegionHandlerit should be RS_ZK_REGION_CLOSED
  CloseRegionHandler handler =
    new CloseRegionHandler(server, rss, hri, false, true,
    versionOfClosingNode);
  handler.process();
  // Handler should have transitioned it to RS_ZK_REGION_CLOSED
  RegionTransitionData data =
    ZKAssign.getData(server.getZooKeeper(), hri.getEncodedName());
  assertTrue(EventType.RS_ZK_REGION_CLOSED == data.getEventType());
}
 

import org.apache.hadoop.hbase.util.MockRegionServerServices; //导入依赖的package包/类
/**
 * Test if close region can handle ZK closing node version mismatch
 * @throws IOException
 * @throws NodeExistsException
 * @throws KeeperException
* @throws DeserializationException 
 */
@Test public void testZKClosingNodeVersionMismatch()
throws IOException, NodeExistsException, KeeperException, DeserializationException {
  final Server server = new MockServer(HTU);
  final MockRegionServerServices rss = new MockRegionServerServices();
  rss.setFileSystem(HTU.getTestFileSystem());
   
  HTableDescriptor htd = TEST_HTD;
  final HRegionInfo hri = TEST_HRI;
   
  // open a region first so that it can be closed later
  OpenRegion(server, rss, htd, hri);
   
  // close the region
  // Create it CLOSING, which is what Master set before sending CLOSE RPC
  int versionOfClosingNode = ZKAssign.createNodeClosing(server.getZooKeeper(),
    hri, server.getServerName());
   
  // The CloseRegionHandler will validate the expected version
  // Given it is set to invalid versionOfClosingNode+1,
  // CloseRegionHandler should be M_ZK_REGION_CLOSING
  CloseRegionHandler handler =
    new CloseRegionHandler(server, rss, hri, false, true,
    versionOfClosingNode+1);
  handler.process();
   
  // Handler should remain in M_ZK_REGION_CLOSING
  RegionTransition rt =
    RegionTransition.parseFrom(ZKAssign.getData(server.getZooKeeper(), hri.getEncodedName()));
  assertTrue(rt.getEventType().equals(EventType.M_ZK_REGION_CLOSING ));
}
 

import org.apache.hadoop.hbase.util.MockRegionServerServices; //导入依赖的package包/类
/**
 * Test if the region can be closed properly
 * @throws IOException
 * @throws NodeExistsException
 * @throws KeeperException
* @throws DeserializationException 
 */
@Test public void testCloseRegion()
throws IOException, NodeExistsException, KeeperException, DeserializationException {
  final Server server = new MockServer(HTU);
  final MockRegionServerServices rss = new MockRegionServerServices();
  rss.setFileSystem(HTU.getTestFileSystem());
   
  HTableDescriptor htd = TEST_HTD;
  HRegionInfo hri = TEST_HRI;
   
  // open a region first so that it can be closed later
  OpenRegion(server, rss, htd, hri);
   
  // close the region
  // Create it CLOSING, which is what Master set before sending CLOSE RPC
  int versionOfClosingNode = ZKAssign.createNodeClosing(server.getZooKeeper(),
    hri, server.getServerName());
   
  // The CloseRegionHandler will validate the expected version
  // Given it is set to correct versionOfClosingNode,
  // CloseRegionHandlerit should be RS_ZK_REGION_CLOSED
  CloseRegionHandler handler =
    new CloseRegionHandler(server, rss, hri, false, true,
    versionOfClosingNode);
  handler.process();
  // Handler should have transitioned it to RS_ZK_REGION_CLOSED
  RegionTransition rt = RegionTransition.parseFrom(
    ZKAssign.getData(server.getZooKeeper(), hri.getEncodedName()));
  assertTrue(rt.getEventType().equals(EventType.RS_ZK_REGION_CLOSED));
}
 

import org.apache.hadoop.hbase.util.MockRegionServerServices; //导入依赖的package包/类
private void initialize() throws IOException {
  // ZK configuration must _not_ have hbase.security.authentication or it will require SASL auth
  Configuration zkConf = new Configuration(conf);
  zkConf.set(User.HBASE_SECURITY_CONF_KEY, "simple");
  this.zookeeper = new ZooKeeperWatcher(zkConf, TokenServer.class.getSimpleName(),
      this, true);
  this.rpcServer.start();

  // mock RegionServerServices to provide to coprocessor environment
  final RegionServerServices mockServices = new MockRegionServerServices() {
    @Override
    public RpcServer getRpcServer() { return rpcServer; }
  };

  // mock up coprocessor environment
  super.start(new RegionCoprocessorEnvironment() {
    @Override
    public HRegion getRegion() { return null; }

    @Override
    public RegionServerServices getRegionServerServices() {
      return mockServices;
    }

    @Override
    public ConcurrentMap<String, Object> getSharedData() { return null; }

    @Override
    public int getVersion() { return 0; }

    @Override
    public String getHBaseVersion() { return null; }

    @Override
    public Coprocessor getInstance() { return null; }

    @Override
    public int getPriority() { return 0; }

    @Override
    public int getLoadSequence() { return 0; }

    @Override
    public Configuration getConfiguration() { return conf; }

    @Override
    public HTableInterface getTable(byte[] tableName) throws IOException { return null; }
  });

  started = true;
}