org.springframework.batch.core.launch.JobLauncher.java Source code

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Here is the source code for org.springframework.batch.core.launch.JobLauncher.java

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/*
 * 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
 *
 *      https://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.core.launch;

import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.JobParametersInvalidException;
import org.springframework.batch.core.repository.JobExecutionAlreadyRunningException;
import org.springframework.batch.core.repository.JobInstanceAlreadyCompleteException;
import org.springframework.batch.core.repository.JobRestartException;

/**
 * Simple interface for controlling jobs, including possible ad-hoc executions,
 * based on different runtime identifiers. It is extremely important to note
 * that this interface makes absolutely no guarantees about whether or not calls
 * to it are executed synchronously or asynchronously. The javadocs for specific
 * implementations should be checked to ensure callers fully understand how the
 * job will be run.
 * 
 * @author Lucas Ward
 * @author Dave Syer
 */

public interface JobLauncher {

    /**
     * Start a job execution for the given {@link Job} and {@link JobParameters}
     * . If a {@link JobExecution} was able to be created successfully, it will
     * always be returned by this method, regardless of whether or not the
     * execution was successful. If there is a past {@link JobExecution} which
     * has paused, the same {@link JobExecution} is returned instead of a new
     * one created. A exception will only be thrown if there is a failure to
     * start the job. If the job encounters some error while processing, the
     * JobExecution will be returned, and the status will need to be inspected.
     *
     * @param job the job to be executed.
     * @param jobParameters the parameters passed to this execution of the job.
     * @return the {@link JobExecution} if it returns synchronously. If the
     * implementation is asynchronous, the status might well be unknown.
     * 
     * @throws JobExecutionAlreadyRunningException if the JobInstance identified
     * by the properties already has an execution running.
     * @throws IllegalArgumentException if the job or jobInstanceProperties are
     * null.
     * @throws JobRestartException if the job has been run before and
     * circumstances that preclude a re-start.
     * @throws JobInstanceAlreadyCompleteException if the job has been run
     * before with the same parameters and completed successfully
     * @throws JobParametersInvalidException if the parameters are not valid for
     * this job
     */
    public JobExecution run(Job job, JobParameters jobParameters) throws JobExecutionAlreadyRunningException,
            JobRestartException, JobInstanceAlreadyCompleteException, JobParametersInvalidException;

}