com.ibm.jbatch.tckspecialized.MyLongRunningBatchletImpl Maven / Gradle / Ivy

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/*
 * Copyright 2012 International Business Machines Corp.
 * 
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership. 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.ibm.jbatch.tck.artifacts.specialized;

import java.util.Random;
import java.util.logging.Logger;

import javax.batch.api.AbstractBatchlet;
import javax.batch.api.BatchProperty;
import javax.batch.runtime.context.JobContext;
import javax.batch.runtime.context.StepContext;
import javax.inject.Inject;

import com.ibm.jbatch.tck.artifacts.reusable.StopOnBulletinBoardTestData;

// NOTE:  We do NOT use the default @Named value in this special case, like we usually do.
// Be careful generating the batch.xml !!  
@javax.inject.Named("myLongRunningBatchlet")
public class MyLongRunningBatchletImpl extends AbstractBatchlet {

	@Inject
	JobContext jobCtx;

	@Inject    
	@BatchProperty(name="run.indefinitely")
	private String runIndefinitelyString = null;
	private boolean runIndefinitely = false;

	@Inject    
	@BatchProperty(name="throw.exc.on.number.3")
	private String throwExcOnThreeString = null;
	private boolean throwExcOnThree = false;

	@Inject 
	private StepContext stepCtx = null; 

	private final static String sourceClass = MyLongRunningBatchletImpl.class.getName();
	private final static Logger logger = Logger.getLogger(sourceClass);

	// I think we need this to be volatile so the value doesn't get cached on the Thread.
	// Not 100% sure.
	private volatile boolean stopped = false;

	private void begin() throws Exception {
		logger.fine("MyLongRunningBatchletImpl.begin()");

		StopOnBulletinBoardTestData testData = (StopOnBulletinBoardTestData) stepCtx.getPersistentUserData();
		if (testData == null) {
			testData = new StopOnBulletinBoardTestData();
			stepCtx.setPersistentUserData(testData);
		}
		
		// Currently we don't use this in the validation logic, it's only a 
		// debugging tool.  It's OK to reuse a thread for multiple partitions
		// so we wouldn't want to simply blow up if we found we were reusing a thread.
		long currentThreadId = Thread.currentThread().getId();
		testData.addThreadIdToList(currentThreadId);
		logger.fine("Running on thread: " + currentThreadId);
		logger.finer("Complete list of threads for this partition:");
		for (long l : testData.getThreadIdArrayList()) {
			logger.finer("Next thread = " + l);
		}
		

		if ("true".equalsIgnoreCase(runIndefinitelyString)) {
			runIndefinitely = true;
		}

		if ("true".equalsIgnoreCase(throwExcOnThreeString)) {
			throwExcOnThree = true;
		}

	}

	@Override
	public String process() throws Exception {
		logger.fine("MyLongRunningBatchLetImpl.process(); current ExitStatus = " + jobCtx.getExitStatus());

		this.begin();

		int i = 0;
		int numTimesToRun = 500;
		boolean maxTimesReached = false;

		while (!stopped) {
			if (i % 100000 == 0) {
				logger.fine("i=" + i++);
			} else {
				logger.finest("i=" + i++);
			}
			if (i==3 && throwExcOnThree) {
				logger.fine("Throwing exception to confirm fail+restart handling on unchecked exceptions.");
				throw new RuntimeException("Throwing exception to confirm fail+restart handling on unchecked exceptions.");
			}

			for (int k = 0; k < 100; k++) {
				Random r = new Random(k); 
				r.nextInt();
			}
			if ((!runIndefinitely) && (i >= numTimesToRun)) {
				maxTimesReached = true;
				break;
			}
		}               

		if (maxTimesReached)   {
			
			
			String currentExitStatus = jobCtx.getExitStatus();  
			if (currentExitStatus != null) {
				jobCtx.setExitStatus("GOOD.STEP." + currentExitStatus);
			} else {
				// Throw this in there in case anyone could somehow think  the first setExitStatus wins.
				// This makes it crystal clear this isn't the case.
				jobCtx.setExitStatus("NOT.FINAL.ONE.SHOULD.HAVE.NO.EFFECT");
				jobCtx.setExitStatus("GOOD.STEP");
			}
			return "BATCHLET RAN TO COMPLETION";
		} else {
			jobCtx.setExitStatus("BATCHLET CANCELED BEFORE COMPLETION");
			return "BATCHLET CANCELED BEFORE COMPLETION";
		}
	}

	@Override
	public void stop() throws Exception {
		logger.fine("MyLongRunningBatchLetImpl.cancel()");
		this.stopped = true; 
	}

	private class MyTransient {
		int data = 0;
		MyTransient(int x) {
			data = x;
		}   
	}

}