Example usage for org.apache.hadoop.fs FsShell FsShell

Introduction

In this page you can find the example usage for org.apache.hadoop.fs FsShell FsShell.

Prototype

public FsShell() 

Source Link

Document

Default ctor with no configuration.

Usage

From source file:com.blackberry.logdriver.LockedFsShell.java

License:Apache License

public static void main(String[] args) {
    // The required args are zkConnectString, dcNumber, service, date, hour,
    // component and an arbitrary number of commands.
    if (args.length < 7) {
        printUsage();//from  ww  w.java  2  s.c om
        System.exit(1);
    }

    String zkConnectString = args[0];
    String dcNumber = args[1];
    String service = args[2];
    String date = args[3];
    String hour = args[4];
    String component = args[5];

    // Set the configuration correctly, so we can reach zookeeper
    Configuration conf = new Configuration();
    conf.set("zk.connect.string", zkConnectString);

    try {
        LockUtil lockUtil = new LockUtil(conf);

        PathInfo pathInfo = new PathInfo();
        pathInfo.setDcNumber(dcNumber);
        pathInfo.setService(service);
        pathInfo.setDate(date);
        pathInfo.setHour(hour);
        pathInfo.setComponent(component);

        String lockPath = lockUtil.getLockPath(pathInfo);

        // Get the write lock
        while (true) {
            try {
                lockUtil.acquireWriteLock(lockPath);
                break;
            } catch (KeeperException.ConnectionLossException e) {
                LOG.warn("Lost connection to ZooKeeper.  Retrying.", e);
            }
        }

        // Run the commands
        int res = 0;

        for (int i = 6; i < args.length; i++) {
            String[] fsShellArgs = args[i].split("\\s+");
            LOG.info("Calling FsShell with args {}", args[i]);
            FsShell shell = new FsShell();
            try {
                res = ToolRunner.run(shell, fsShellArgs);
            } finally {
                shell.close();
            }

            if (res != 0) {
                break;
            }
        }

        // Release the write lock
        while (true) {
            try {
                lockUtil.releaseWriteLock(lockPath);
                break;
            } catch (KeeperException.ConnectionLossException e) {
                LOG.warn("Lost connection to ZooKeeper.  Retrying.", e);
            }
        }

        if (res != 0) {
            LOG.error("Bad return value ({}) from FsShell", res);
            System.exit(res);
        }

    } catch (Exception e) {
        e.printStackTrace();
        System.exit(1);
    }
}

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