Examples of com.ngdata.hbaseindexer.util.zookeeper.StateWatchingZooKeeper

Package com.ngdata.hbaseindexer.util.zookeeper

Examples of com.ngdata.hbaseindexer.util.zookeeper.StateWatchingZooKeeper

com.ngdata.hbaseindexer.util.zookeeper.StateWatchingZooKeeper
This implementation of {@link ZooKeeperItf} is meant for use as a global ZooKeeper handlewithin a ZK-dependent application.
It will:
- on startup (= constructor) wait for the ZK connection to come up, if it does not come up within the session timeout an exception will be thrown. This avoids the remainder of the application starting up in the absence of a valid ZK connection.
- when the session expires or the ZK connection is lost for longer than the session timeout, it will shut down the application.
So this is a good solution for applications which can not function in absence of ZooKeeper.


            if (hbaseIndexerName == null) {
                throw new IllegalStateException("--hbase-indexer-name must be supplied if --hbase-indexer-zk is specified");
            }


            StateWatchingZooKeeper zk = null;
            try {
                zk = new StateWatchingZooKeeper(hbaseIndexerZkHost, 30000);
                IndexerModelImpl indexerModel = new IndexerModelImpl(zk, conf.get(ConfKeys.ZK_ROOT_NODE, "/ngdata/hbaseindexer"));
                IndexerDefinition indexerDefinition = indexerModel.getIndexer(hbaseIndexerName);
                hbaseIndexerComponentFactory = indexerDefinition.getIndexerComponentFactory();
                configuration = indexerDefinition.getConfiguration();
                if (indexerDefinition.getConnectionParams() != null) {

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        log.debug("Using hostname " + hostname);


        String zkConnectString = conf.get(ConfKeys.ZK_CONNECT_STRING);
        int zkSessionTimeout = conf.getInt(ConfKeys.ZK_SESSION_TIMEOUT, 30000);
        zk = new StateWatchingZooKeeper(zkConnectString, zkSessionTimeout);


        tablePool = new HTablePool(conf, 10 /* TODO configurable */);


        String zkRoot = conf.get(ConfKeys.ZK_ROOT_NODE);

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        Closer.close(zk);
        super.cleanup();
    }


    private void connectWithZooKeeper() throws IOException, KeeperException, InterruptedException {
        zk = new StateWatchingZooKeeper(zkConnectionString, 30000);


        final String zkRoot = conf.get("hbaseindexer.zookeeper.znode.parent");


        boolean indexerNodeExists = zk.retryOperation(new ZooKeeperOperation<Boolean>() {
            @Override

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Related Classes of com.ngdata.hbaseindexer.util.zookeeper.StateWatchingZooKeeper

com.ngdata.hbaseindexer.cli.BaseIndexCli

com.ngdata.hbaseindexer.Main

com.ngdata.hbaseindexer.mr.HBaseIndexingOptions

org.apache.zookeeper.ZooKeeper

java.io.IOException

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