InfiniteLoopIncrementer.java

/*
 * Copyright 2006-2007 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 org.springframework.batch.sample.common;

import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.JobParametersBuilder;
import org.springframework.batch.core.JobParametersIncrementer;

/**
 * @author Dave Syer
 *
 */
public class InfiniteLoopIncrementer implements JobParametersIncrementer {

	/**
	 * Increment the run.id parameter.
	 */
	public JobParameters getNext(JobParameters parameters) {
		if (parameters==null || parameters.isEmpty()) {
			return new JobParametersBuilder().addLong("run.id", 1L).toJobParameters();
		}
		long id = parameters.getLong("run.id",1L) + 1;
		return new JobParametersBuilder().addLong("run.id", id).toJobParameters();
	}

}