org.apache.hms.agent.dispatcher.ShellRunner.java Source code

Introduction

Here is the source code for org.apache.hms.agent.dispatcher.ShellRunner.java

Source

/*
 * 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.hms.agent.dispatcher;

import java.io.DataInputStream;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hms.agent.Agent;
import org.apache.hms.common.entity.ScriptCommand;
import org.apache.hms.common.rest.Response;
import org.apache.hms.common.util.ExceptionUtil;

public class ShellRunner {
    private static Log log = LogFactory.getLog(ShellRunner.class);

    public Response run(ScriptCommand cmd) {
        Response r = new Response();
        StringBuilder stdout = new StringBuilder();
        StringBuilder errorBuffer = new StringBuilder();
        Process proc;
        try {
            String[] parameters = cmd.getParms();
            int size = 0;
            if (parameters != null) {
                size = parameters.length;
            }
            String[] cmdArray = new String[size + 1];
            cmdArray[0] = cmd.getScript();
            for (int i = 0; i < size; i++) {
                cmdArray[i + 1] = parameters[i];
            }
            proc = Runtime.getRuntime().exec(cmdArray);
            DataInputStream in = new DataInputStream(proc.getInputStream());
            DataInputStream err = new DataInputStream(proc.getErrorStream());
            String str;
            while ((str = in.readLine()) != null) {
                stdout.append(str);
                stdout.append("\n");
            }
            while ((str = err.readLine()) != null) {
                errorBuffer.append(str);
                errorBuffer.append("\n");
            }
            int exitCode = proc.waitFor();
            r.setCode(exitCode);
            r.setError(errorBuffer.toString());
            r.setOutput(stdout.toString());
        } catch (Exception e) {
            r.setCode(1);
            r.setError(ExceptionUtil.getStackTrace(e));
            log.error(ExceptionUtil.getStackTrace(e));
        }
        log.info(cmd);
        log.info(r);
        return r;
    }

}