actors.ConfigUtil.java Source code

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Here is the source code for actors.ConfigUtil.java

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/**
 * Copyright 2015 LinkedIn Corp. All rights reserved.
 *
 * 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.
 */
package actors;

import com.google.common.collect.ImmutableList;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Arrays;
import java.util.Properties;
import wherehows.common.Constant;
import wherehows.common.jobs.Launcher;

import static org.apache.commons.lang3.StringUtils.*;

/**
 * Utility class for generate cmd, write and delete config files.
 */
class ConfigUtil {

    private static final String WH_APPLICATION_DEFAULT_DIRECTORY = "/var/tmp/wherehows";

    /**
     * Generate the config file in the 'wherehows.app_folder' folder
     * The file name is {whEtlExecId}.config
     *
     * @param whEtlExecId
     * @param props
     * @return void
     */
    static void generateProperties(long whEtlExecId, Properties props, String outDir) throws IOException {
        File dir = new File(outDir);
        if (!dir.exists()) {
            dir.mkdirs();
        }

        File configFile = new File(dir, whEtlExecId + ".properties");
        FileWriter writer = new FileWriter(configFile);
        props.store(writer, "exec id : " + whEtlExecId + " job configurations");
        writer.close();
    }

    static void deletePropertiesFile(long whEtlExecId, String outDir) {
        File configFile = new File(outDir, whEtlExecId + ".properties");
        if (configFile.exists()) {
            configFile.delete();
        }
    }

    static ProcessBuilder buildProcess(String javaCmd, String etlJobName, long whEtlExecId, String cmdParam,
            Properties etlJobProperties) {
        String classPath = System.getProperty("java.class.path");
        String outDir = etlJobProperties.getProperty(Constant.WH_APP_FOLDER_KEY, WH_APPLICATION_DEFAULT_DIRECTORY);
        String configFile = outDir + "/" + whEtlExecId + ".properties";

        String[] cmdParams = isNotBlank(cmdParam) ? cmdParam.trim().split(" ") : new String[0];

        ProcessBuilder pb = new ProcessBuilder(new ImmutableList.Builder<String>().add(javaCmd)
                .addAll(Arrays.asList(cmdParams)).add("-cp").add(classPath).add("-Dconfig=" + configFile)
                .add("-DCONTEXT=" + etlJobName).add("-Dlogback.configurationFile=etl_logback.xml")
                .add("-DLOG_DIR=" + outDir).add(Launcher.class.getCanonicalName()).build());
        pb.redirectOutput(ProcessBuilder.Redirect.to(new File(outDir + "/stdout")));
        pb.redirectError(ProcessBuilder.Redirect.to(new File(outDir + "/stderr")));
        return pb;
    }
}