com.aliyun.openservices.odps.console.pub.StopInstanceCommand.java Source code

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Here is the source code for com.aliyun.openservices.odps.console.pub.StopInstanceCommand.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 com.aliyun.openservices.odps.console.pub;

import java.io.PrintStream;
import java.util.Map;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;

import com.aliyun.odps.Instance;
import com.aliyun.odps.Odps;
import com.aliyun.odps.OdpsException;
import com.aliyun.openservices.odps.console.ExecutionContext;
import com.aliyun.openservices.odps.console.ODPSConsoleException;
import com.aliyun.openservices.odps.console.commands.AbstractCommand;
import com.aliyun.openservices.odps.console.constants.ODPSConsoleConstants;

import jline.console.UserInterruptException;

public class StopInstanceCommand extends AbstractCommand {

    public static final String[] HELP_TAGS = new String[] { "kill", "stop", "instance" };

    public static void printUsage(PrintStream stream) {
        stream.println("Usage: kill [instanceID]");
    }

    String instanceId;

    boolean synchronizeFlag;//true=>synchronized

    public String getInstanceId() {
        return instanceId;
    }

    public StopInstanceCommand(String commandText, ExecutionContext context, String instanceId,
            boolean synchronizeFlag) {
        super(commandText, context);
        this.instanceId = instanceId;
        this.synchronizeFlag = synchronizeFlag;
    }

    static Options initOptions() {
        Options opts = new Options();
        Option synchronizeFlag = new Option("sync", true, "synchronizeFlag");
        synchronizeFlag.setRequired(false);

        opts.addOption(synchronizeFlag);

        return opts;
    }

    static CommandLine getCommandLine(String[] commandText) throws ODPSConsoleException {
        Options opts = initOptions();
        CommandLineParser clp = new GnuParser();
        CommandLine cl;
        try {
            cl = clp.parse(opts, commandText, false);
        } catch (Exception e) {
            throw new ODPSConsoleException("Unknown exception from client - " + e.getMessage(), e);
        }

        return cl;
    }

    public void run() throws OdpsException, ODPSConsoleException {

        Odps odps = getCurrentOdps();
        Instance instance = odps.instances().get(instanceId);
        instance.stop();

        if (synchronizeFlag) {
            while (!instance.isTerminated()) {
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException e) {
                    throw new UserInterruptException(e.getMessage());
                }
            }

            synchronizeFlag = false;
            writeStatus(instance.getStatus().toString());

            return;
        }

        writeStatus(null);

    }

    private void writeStatus(String status) {
        getWriter().writeError("OK");

        if (status == null) {
            getWriter().writeError("please check instance status. [status " + instanceId + ";]");
        } else {
            getWriter().writeError("instance " + instanceId + " has been " + status + " ;");
        }
    }

    public static StopInstanceCommand parse(String commandString, ExecutionContext sessionContext)
            throws ODPSConsoleException {
        if (commandString.toUpperCase().startsWith("KILL")) {

            String temp[] = commandString.trim().replaceAll("\\s+", " ").split(" ");

            CommandLine cl = getCommandLine(temp);

            if (2 == cl.getArgs().length) {
                return new StopInstanceCommand(commandString, sessionContext, temp[1], false);
            }

            if (1 != cl.getArgs().length) {
                throw new ODPSConsoleException(ODPSConsoleConstants.BAD_COMMAND + "[invalid parameters]");
            }

            if (cl.hasOption("sync")) {
                return new StopInstanceCommand(commandString, sessionContext, cl.getOptionValue("sync"), true);
            }
        }

        return null;
    }
}