spring-batch DefaultStepExecutionAggregator 源码
spring-batch DefaultStepExecutionAggregator 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/partition/support/DefaultStepExecutionAggregator.java
/*
* Copyright 2006-2013 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.partition.support;
import org.springframework.batch.core.BatchStatus;
import org.springframework.batch.core.ExitStatus;
import org.springframework.batch.core.StepExecution;
import org.springframework.util.Assert;
import java.util.Collection;
/**
* Convenience class for aggregating a set of {@link StepExecution} instances into a
* single result.
*
* @author Dave Syer
* @since 2.1
*/
public class DefaultStepExecutionAggregator implements StepExecutionAggregator {
/**
* Aggregates the input executions into the result {@link StepExecution}. The
* aggregated fields are
* <ul>
* <li>status - choosing the highest value using
* {@link BatchStatus#max(BatchStatus, BatchStatus)}</li>
* <li>exitStatus - using {@link ExitStatus#and(ExitStatus)}</li>
* <li>commitCount, rollbackCount, etc. - by arithmetic sum</li>
* </ul>
* @see StepExecutionAggregator #aggregate(StepExecution, Collection)
*/
@Override
public void aggregate(StepExecution result, Collection<StepExecution> executions) {
Assert.notNull(result, "To aggregate into a result it must be non-null.");
if (executions == null) {
return;
}
for (StepExecution stepExecution : executions) {
BatchStatus status = stepExecution.getStatus();
result.setStatus(BatchStatus.max(result.getStatus(), status));
result.setExitStatus(result.getExitStatus().and(stepExecution.getExitStatus()));
result.setFilterCount(result.getFilterCount() + stepExecution.getFilterCount());
result.setProcessSkipCount(result.getProcessSkipCount() + stepExecution.getProcessSkipCount());
result.setCommitCount(result.getCommitCount() + stepExecution.getCommitCount());
result.setRollbackCount(result.getRollbackCount() + stepExecution.getRollbackCount());
result.setReadCount(result.getReadCount() + stepExecution.getReadCount());
result.setReadSkipCount(result.getReadSkipCount() + stepExecution.getReadSkipCount());
result.setWriteCount(result.getWriteCount() + stepExecution.getWriteCount());
result.setWriteSkipCount(result.getWriteSkipCount() + stepExecution.getWriteSkipCount());
}
}
}
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