org.apache.ambari.servicemonitor.clients.LsDir.java Source code

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Here is the source code for org.apache.ambari.servicemonitor.clients.LsDir.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ambari.servicemonitor.clients;

import org.apache.ambari.servicemonitor.utils.Exit;
import org.apache.ambari.servicemonitor.utils.OnDemandFS;
import org.apache.ambari.servicemonitor.utils.ToolRunnerPlus;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;

import java.io.IOException;
import java.util.Date;

public class LsDir extends BaseClient {
    private static final Log LOG = LogFactory.getLog(LsDir.class);

    public String dirName = "/";
    private Path dir;
    protected OnDemandFS cachedFS;

    @Override
    protected Options createChildOptions(Options options) {
        Option option = new Option("d", "dir", true, "directory");
        option.setRequired(true);
        options.addOption(option);
        return options;
    }

    @Override
    protected void init(CommandLine commandLine) throws IOException {
        super.init(commandLine);
        dirName = commandLine.getOptionValue("dir");
        info("Working with " + FileSystem.getDefaultUri(getConf()) + " directory: " + dirName);
    }

    @Override
    protected void setup() throws IOException {
        super.setup();
        dir = new Path(dirName);
        cachedFS = new OnDemandFS(getConf());
    }

    @Override
    protected void teardown() throws IOException {
        cachedFS.close();
        super.teardown();
    }

    @Override
    protected Operation executeOneOperation() throws IOException {
        Operation operation = new Operation("ls " + dir);

        started(operation);
        try {
            FileSystem result;
            result = cachedFS.getOrCreate();
            FileSystem fs = result;
            FileStatus dirStatus = fs.getFileStatus(dir);
            StringBuilder builder = new StringBuilder();
            builder.append("File ").append(dirStatus.getPath());
            builder.append(" type: ");
            builder.append(dirStatus.isDir() ? "directory" : "file");
            builder.append(" ");
            builder.append("Last Modified ").append(new Date(dirStatus.getModificationTime()));
            operation.success(builder.toString());
        } catch (ExitClientRunException e) {
            //propagate this up
            throw e;
        } catch (IOException e) {
            //all other outcomes are failures
            operation.failure(e);
        }
        return operation;
    }

    @Override
    public String getDescription() {
        return "ls " + dir;
    }

    public static void main(String[] args) {
        try {
            int res = ToolRunnerPlus.run(new Configuration(), new LsDir(), args);
            Exit.exitProcess(true);
        } catch (Exception e) {
            Exit.exitOnException(e);
        }
    }
}