Examples of org.apache.hadoop.hbase.Abortable

org.apache.hadoop.hbase.Abortable
Interface to support the aborting of a given server or client.
This is used primarily for ZooKeeper usage when we could get an unexpected and fatal exception, requiring an abort.
Implemented by the Master, RegionServer, and TableServers (client).

    MiniHBaseCluster cluster = TEST_UTIL.getHBaseCluster();
    log("Cluster started");


    // Create a ZKW to use in the test
    ZooKeeperWatcher zkw = new ZooKeeperWatcher(TEST_UTIL.getConfiguration(),
        "unittest", new Abortable() {


          @Override
          public void abort(String why, Throwable e) {
            LOG.error("Fatal ZK Error: " + why, e);
            org.junit.Assert.assertFalse("Fatal ZK error", true);

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     Configuration newConfig = new Configuration(TEST_UTIL.getConfiguration());
     newConfig.set(HConstants.HBASE_CLIENT_INSTANCE_ID, "12345");


     // First with a simple ZKW
     ZooKeeperWatcher z0 = new ZooKeeperWatcher(
       newConfig, "hconnection", new Abortable() {
       @Override public void abort(String why, Throwable e) {}
       @Override public boolean isAborted() {return false;}
     });
     z0.getRecoverableZooKeeper().getZooKeeper().exists("/oldZooKeeperWatcher", false);
     z0.close();

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  @AfterClass public static void afterClass() throws IOException {
    UTIL.getZkCluster().shutdown();
  }


  @Before public void before() throws IOException {
    this.abortable = new Abortable() {
      @Override
      public void abort(String why, Throwable e) {
        LOG.info(why, e);
      }

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    }
  }


  private ZooKeeperWatcher createZooKeeperWatcher() throws IOException {
    return new ZooKeeperWatcher(connection.getConfiguration(),
      "Replication Admin", new Abortable() {
      @Override
      public void abort(String why, Throwable e) {
        LOG.error(why, e);
        System.exit(1);
      }

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  @After
  public void tearDown()
  throws KeeperException, ZooKeeperConnectionException, IOException {
    // Make sure zk is clean before we run the next test.
    ZooKeeperWatcher zkw = new ZooKeeperWatcher(TESTUTIL.getConfiguration(),
        "@Before", new Abortable() {
      @Override
      public void abort(String why, Throwable e) {
        throw new RuntimeException(why, e);
      }

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    this.connection = connection;
    if (abortable == null) {
      // A connection is abortable.
      this.abortable = this.connection;
    }
    Abortable throwableAborter = new Abortable() {


      @Override
      public void abort(String why, Throwable e) {
        throw new RuntimeException(why, e);
      }

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    // Master should *NOT* die:
    // we are testing that the default setting of hbase.coprocessor.abortonerror
    // =false
    // is respected.
    ZooKeeperWatcher zkw = new ZooKeeperWatcher(UTIL.getConfiguration(),
      "unittest", new Abortable() {
      @Override
      public void abort(String why, Throwable e) {
        throw new RuntimeException("Fatal ZK error: " + why, e);
      }
      @Override
      public boolean isAborted() {
        return false;
      }
    });


    MasterTracker masterTracker = new MasterTracker(zkw,"/hbase/master",
        new Abortable() {
          @Override
          public void abort(String why, Throwable e) {
            throw new RuntimeException("Fatal Zookeeper tracker error, why=", e);
          }
          @Override

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    assertFalse("No table created yet", cp.wasCreateTableCalled());


    // set a watch on the zookeeper /hbase/master node. If the master dies,
    // the node will be deleted.
    ZooKeeperWatcher zkw = new ZooKeeperWatcher(UTIL.getConfiguration(),
      "unittest", new Abortable() {
      @Override
      public void abort(String why, Throwable e) {
        throw new RuntimeException("Fatal ZK error: " + why, e);
      }
      @Override
      public boolean isAborted() {
        return false;
      }
    });


    MasterTracker masterTracker = new MasterTracker(zkw,"/hbase/master",
        new Abortable() {
          @Override
          public void abort(String why, Throwable e) {
            throw new RuntimeException("Fatal ZK master tracker error, why=", e);
          }
          @Override

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    }
    return true;
  }


  private ZooKeeperWatcher createZooKeeperWatcher() throws IOException {
    return new ZooKeeperWatcher(getConf(), "hbase Fsck", new Abortable() {
      @Override
      public void abort(String why, Throwable e) {
        LOG.error(why, e);
        System.exit(1);
      }

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     Configuration newConfig = new Configuration(TEST_UTIL.getConfiguration());
     newConfig.set(HConstants.HBASE_CLIENT_INSTANCE_ID, "12345");


     // First with a simple ZKW
     ZooKeeperWatcher z0 = new ZooKeeperWatcher(
       newConfig, "hconnection", new Abortable() {
       @Override public void abort(String why, Throwable e) {}
       @Override public boolean isAborted() {return false;}
     });
     z0.getRecoverableZooKeeper().getZooKeeper().exists("/oldZooKeeperWatcher", false);
     z0.close();

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