spring-batch Job 源码
spring-batch Job 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/Job.java
/*
* Copyright 2006-2022 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;
import org.springframework.batch.core.job.DefaultJobParametersValidator;
import org.springframework.lang.Nullable;
/**
* Batch domain object representing a job. {@code Job} is an explicit abstraction
* representing the configuration of a job specified by a developer. Note that the restart
* policy is applied to the job as a whole and not to a step.
*
* @author Dave Syer
* @author Mahmoud Ben Hassine
*/
public interface Job {
String getName();
/**
* Flag to indicate if this job can be restarted, at least in principle.
* @return true if this job can be restarted after a failure. Defaults to
* {@code true}.
*/
default boolean isRestartable() {
return true;
}
/**
* Run the {@link JobExecution} and update the meta information, such as status and
* statistics, as necessary. This method should not throw any exceptions for failed
* execution. Clients should be careful to inspect the {@link JobExecution} status to
* determine success or failure.
* @param execution a {@link JobExecution}
*/
void execute(JobExecution execution);
/**
* If clients need to generate new parameters for the next execution in a sequence,
* they can use this incrementer. The return value may be {@code null}, when this job
* does not have a natural sequence.
* @return an incrementer to be used for creating new parameters. Defaults to
* {@code null}.
*/
@Nullable
default JobParametersIncrementer getJobParametersIncrementer() {
return null;
}
/**
* A validator for the job parameters of a {@link JobExecution}. Clients of a
* {@code Job} may need to validate the parameters for a launch or before or during
* the execution.
* @return a validator that can be used to check parameter values (never
* {@code null}). Defaults to {@link DefaultJobParametersValidator}.
*/
default JobParametersValidator getJobParametersValidator() {
return new DefaultJobParametersValidator();
}
}
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