spring-batch FlowStepBuilder 源码
spring-batch FlowStepBuilder 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/step/builder/FlowStepBuilder.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.step.builder;
import org.springframework.batch.core.Step;
import org.springframework.batch.core.job.flow.Flow;
import org.springframework.batch.core.job.flow.FlowStep;
/**
* A step builder for {@link FlowStep} instances. A flow step delegates processing to a
* nested flow composed of other steps.
*
* @author Dave Syer
* @since 2.2
*/
public class FlowStepBuilder extends StepBuilderHelper<FlowStepBuilder> {
private Flow flow;
/**
* Create a new builder initialized with any properties in the parent. The parent is
* copied, so it can be re-used.
* @param parent a parent helper containing common step properties
*/
public FlowStepBuilder(StepBuilderHelper<?> parent) {
super(parent);
}
/**
* Provide a flow to execute during the step.
* @param flow the flow to execute
* @return this for fluent chaining
*/
public FlowStepBuilder flow(Flow flow) {
this.flow = flow;
return this;
}
/**
* Build a step that executes the flow provided, normally composed of other steps. The
* flow is not executed in a transaction because the individual steps are supposed to
* manage their own transaction state.
* @return a flow step
*/
public Step build() {
FlowStep step = new FlowStep();
step.setName(getName());
step.setFlow(flow);
super.enhance(step);
try {
step.afterPropertiesSet();
}
catch (Exception e) {
throw new StepBuilderException(e);
}
return step;
}
@Override
protected FlowStepBuilder self() {
return this;
}
}
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