View Javadoc

1   /*
2    * Copyright 2006-2013 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.springframework.batch.core.job.flow.support.state;
18  
19  import org.springframework.batch.core.Step;
20  import org.springframework.batch.core.job.flow.FlowExecutionStatus;
21  import org.springframework.batch.core.job.flow.FlowExecutor;
22  import org.springframework.batch.core.job.flow.State;
23  import org.springframework.batch.core.step.StepHolder;
24  
25  /**
26   * {@link State} implementation that delegates to a {@link FlowExecutor} to
27   * execute the specified {@link Step}.
28   *
29   * @author Dave Syer
30   * @since 2.0
31   */
32  public class StepState extends AbstractState implements StepHolder {
33  
34  	private final Step step;
35  
36  	/**
37  	 * @param step the step that will be executed
38  	 */
39  	public StepState(Step step) {
40  		super(step.getName());
41  		this.step = step;
42  	}
43  
44  	/**
45  	 * @param name for the step that will be executed
46  	 * @param step the step that will be executed
47  	 */
48  	public StepState(String name, Step step) {
49  		super(name);
50  		this.step = step;
51  	}
52  
53  	@Override
54  	public FlowExecutionStatus handle(FlowExecutor executor) throws Exception {
55  		/*
56  		 * On starting a new step, possibly upgrade the last execution to make
57  		 * sure it is abandoned on restart if it failed.
58  		 */
59  		executor.abandonStepExecution();
60  		return new FlowExecutionStatus(executor.executeStep(step));
61  	}
62  
63  	/**
64  	 * @return the step
65  	 */
66  	@Override
67  	public Step getStep() {
68  		return step;
69  	}
70  
71  	/* (non-Javadoc)
72  	 * @see org.springframework.batch.core.job.flow.State#isEndState()
73  	 */
74  	@Override
75  	public boolean isEndState() {
76  		return false;
77  	}
78  
79  }