Example usage for org.apache.hadoop.hdfs DFSConfigKeys DFS_DATA_ENCRYPTION_ALGORITHM_KEY

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs DFSConfigKeys DFS_DATA_ENCRYPTION_ALGORITHM_KEY.

Prototype

String DFS_DATA_ENCRYPTION_ALGORITHM_KEY

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Usage

From source file:mzb.NameNodeConnector.java

License:Apache License

NameNodeConnector(URI nameNodeUri, Configuration conf) throws IOException {
    this.nameNodeUri = nameNodeUri;

    this.namenode = NameNodeProxies.createProxy(conf, nameNodeUri, NamenodeProtocol.class).getProxy();
    this.client = NameNodeProxies.createProxy(conf, nameNodeUri, ClientProtocol.class).getProxy();
    this.fs = FileSystem.get(nameNodeUri, conf);

    final NamespaceInfo namespaceinfo = namenode.versionRequest();
    this.blockpoolID = namespaceinfo.getBlockPoolID();

    final ExportedBlockKeys keys = namenode.getBlockKeys();
    this.isBlockTokenEnabled = keys.isBlockTokenEnabled();
    if (isBlockTokenEnabled) {
        long blockKeyUpdateInterval = keys.getKeyUpdateInterval();
        long blockTokenLifetime = keys.getTokenLifetime();
        LOG.info(/*from  ww w  .  j  a  v  a2s .  c om*/
                "Block token params received from NN: keyUpdateInterval=" + blockKeyUpdateInterval / (60 * 1000)
                        + " min(s), tokenLifetime=" + blockTokenLifetime / (60 * 1000) + " min(s)");
        String encryptionAlgorithm = conf.get(DFSConfigKeys.DFS_DATA_ENCRYPTION_ALGORITHM_KEY);
        this.blockTokenSecretManager = new BlockTokenSecretManager(blockKeyUpdateInterval, blockTokenLifetime,
                blockpoolID, encryptionAlgorithm);
        this.blockTokenSecretManager.addKeys(keys);
        /*
         * Balancer should sync its block keys with NN more frequently than NN
         * updates its block keys
         */
        this.keyUpdaterInterval = blockKeyUpdateInterval / 4;
        LOG.info(
                "Balancer will update its block keys every " + keyUpdaterInterval / (60 * 1000) + " minute(s)");
        this.keyupdaterthread = new Daemon(new BlockKeyUpdater());
        this.shouldRun = true;
        this.keyupdaterthread.start();
    }
    this.encryptDataTransfer = fs.getServerDefaults(new Path("/")).getEncryptDataTransfer();
    // Check if there is another balancer running.
    // Exit if there is another one running.
    out = checkAndMarkRunningBalancer();
    if (out == null) {
        throw new IOException("Another balancer is running");
    }
}

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