001/* 002 * Copyright 2006-2013 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.batch.core.partition.support; 018 019import org.springframework.batch.core.BatchStatus; 020import org.springframework.batch.core.ExitStatus; 021import org.springframework.batch.core.StepExecution; 022import org.springframework.util.Assert; 023 024import java.util.Collection; 025 026/** 027 * Convenience class for aggregating a set of {@link StepExecution} instances 028 * into a single result. 029 * 030 * @author Dave Syer 031 * @since 2.1 032 */ 033public class DefaultStepExecutionAggregator implements StepExecutionAggregator { 034 035 /** 036 * Aggregates the input executions into the result {@link StepExecution}. 037 * The aggregated fields are 038 * <ul> 039 * <li>status - choosing the highest value using 040 * {@link BatchStatus#max(BatchStatus, BatchStatus)}</li> 041 * <li>exitStatus - using {@link ExitStatus#and(ExitStatus)}</li> 042 * <li>commitCount, rollbackCount, etc. - by arithmetic sum</li> 043 * </ul> 044 * @see StepExecutionAggregator #aggregate(StepExecution, Collection) 045 */ 046 @Override 047 public void aggregate(StepExecution result, Collection<StepExecution> executions) { 048 Assert.notNull(result, "To aggregate into a result it must be non-null."); 049 if (executions == null) { 050 return; 051 } 052 for (StepExecution stepExecution : executions) { 053 BatchStatus status = stepExecution.getStatus(); 054 result.setStatus(BatchStatus.max(result.getStatus(), status)); 055 result.setExitStatus(result.getExitStatus().and(stepExecution.getExitStatus())); 056 result.setFilterCount(result.getFilterCount() + stepExecution.getFilterCount()); 057 result.setProcessSkipCount(result.getProcessSkipCount() + stepExecution.getProcessSkipCount()); 058 result.setCommitCount(result.getCommitCount() + stepExecution.getCommitCount()); 059 result.setRollbackCount(result.getRollbackCount() + stepExecution.getRollbackCount()); 060 result.setReadCount(result.getReadCount() + stepExecution.getReadCount()); 061 result.setReadSkipCount(result.getReadSkipCount() + stepExecution.getReadSkipCount()); 062 result.setWriteCount(result.getWriteCount() + stepExecution.getWriteCount()); 063 result.setWriteSkipCount(result.getWriteSkipCount() + stepExecution.getWriteSkipCount()); 064 } 065 } 066 067}