com.creactiviti.piper.core.taskhandler.script.Bash.java Source code

Introduction

Here is the source code for com.creactiviti.piper.core.taskhandler.script.Bash.java

Source

/*
 * Copyright 2016-2018 the original author or authors.
 *
 * Licensed 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.creactiviti.piper.core.taskhandler.script;

import java.io.File;
import java.io.PrintStream;

import org.apache.commons.exec.CommandLine;
import org.apache.commons.exec.DefaultExecutor;
import org.apache.commons.exec.ExecuteException;
import org.apache.commons.exec.PumpStreamHandler;
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import com.creactiviti.piper.core.task.Task;
import com.creactiviti.piper.core.task.TaskHandler;

/**
 * a {@link TaskHandler} implementaion which lets one 
 * run arbitrary Bash scripts.
 * 
 * @author Arik Cohen
 * @since Apr 14, 2017
 */
@Component
public class Bash implements TaskHandler<String> {

    private Logger logger = LoggerFactory.getLogger(getClass());

    @Override
    public String handle(Task aTask) throws Exception {
        File scriptFile = File.createTempFile("_script", ".sh");
        File logFile = File.createTempFile("log", null);
        FileUtils.writeStringToFile(scriptFile, aTask.getRequiredString("script"));
        try (PrintStream stream = new PrintStream(logFile);) {
            Process chmod = Runtime.getRuntime().exec(String.format("chmod u+x %s", scriptFile.getAbsolutePath()));
            int chmodRetCode = chmod.waitFor();
            if (chmodRetCode != 0) {
                throw new ExecuteException("Failed to chmod", chmodRetCode);
            }
            CommandLine cmd = new CommandLine(scriptFile.getAbsolutePath());
            logger.debug("{}", cmd);
            DefaultExecutor exec = new DefaultExecutor();
            exec.setStreamHandler(new PumpStreamHandler(stream));
            exec.execute(cmd);
            return FileUtils.readFileToString(logFile);
        } catch (ExecuteException e) {
            throw new ExecuteException(e.getMessage(), e.getExitValue(),
                    new RuntimeException(FileUtils.readFileToString(logFile)));
        } finally {
            FileUtils.deleteQuietly(logFile);
            FileUtils.deleteQuietly(scriptFile);
        }
    }

}