/*
* The MIT License
*
* Copyright (c) 2014, Mahmoud Ben Hassine (md.benhassine@gmail.com)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.easybatch.tutorials.parallel;
import org.easybatch.core.api.EasyBatchReport;
import org.easybatch.core.filter.RecordNumberGreaterThanRecordFilter;
import org.easybatch.core.filter.RecordNumberLowerThanRecordFilter;
import org.easybatch.core.impl.EasyBatchEngine;
import org.easybatch.core.impl.EasyBatchEngineBuilder;
import org.easybatch.flatfile.FlatFileRecordReader;
import java.io.File;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
/**
* Main class to run the crypto tutorial with a single input file in parallel.
*
* @author Mahmoud Ben Hassine (md.benhassine@gmail.com)
*/
public class SingleFileLauncher {
public static final String COMMENT_SEPARATOR = "####################################";
public static void main(String[] args) throws Exception {
System.out.println(COMMENT_SEPARATOR);
System.out.println("Running a single Easy Batch instance");
System.out.println(COMMENT_SEPARATOR);
long singleInstanceStartTime = System.nanoTime();
EasyBatchEngine easyBatchEngine = new EasyBatchEngineBuilder()
.registerRecordReader(new FlatFileRecordReader(new File(args[0]))) //read data from secret-messages.txt
.registerRecordProcessor(new MessageEncrypter())
.build();
EasyBatchReport easyBatchReport = easyBatchEngine.call();
System.out.println(easyBatchReport);
long singleInstanceEndTime = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - singleInstanceStartTime);
System.out.println(COMMENT_SEPARATOR);
System.out.println("Running two Easy Batch instances in parallel");
System.out.println(COMMENT_SEPARATOR);
long parallelInstancesStartTime = System.nanoTime();
// To avoid any thread-safety issues,
// we will create 2 engines with separate instances of record readers and processors
// Build an easy batch engine1
EasyBatchEngine easyBatchEngine1 = new EasyBatchEngineBuilder()
.registerRecordReader(new FlatFileRecordReader(new File(args[0]))) //read data from secret-messages.txt
.registerRecordFilter(new RecordNumberGreaterThanRecordFilter(5)) // filter records 6-10
.registerRecordProcessor(new MessageEncrypter())
.build();
// Build an easy batch engine2
EasyBatchEngine easyBatchEngine2 = new EasyBatchEngineBuilder()
.registerRecordReader(new FlatFileRecordReader(new File(args[0]))) //read data from secret-messages.txt
.registerRecordFilter(new RecordNumberLowerThanRecordFilter(6)) // filter records 1-5
.registerRecordProcessor(new MessageEncrypter())
.build();
//create a 2 threads pool to call Easy Batch engines in parallel
ExecutorService executorService = Executors.newFixedThreadPool(2);
Future<EasyBatchReport> easyBatchReport1 = executorService.submit(easyBatchEngine1);
Future<EasyBatchReport> easyBatchReport2 = executorService.submit(easyBatchEngine2);
System.out.println("Easy Batch Report 1 = " + easyBatchReport1.get());
System.out.println("Easy Batch Report 2 = " + easyBatchReport2.get());
executorService.shutdown();
long parallelInstancesEndTime = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - parallelInstancesStartTime);
System.out.println(COMMENT_SEPARATOR);
System.out.println("Processing the input file with two Easy Batch instances in parallel took " + parallelInstancesEndTime + "ms");
System.out.println("Processing the input file with a single Easy Batch instance took " + singleInstanceEndTime + "ms");
System.out.println(COMMENT_SEPARATOR);
}
}