org.springframework.xd.dirt.plugins.job.support.listener.SimpleXdChunkListener.java Source code

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Here is the source code for org.springframework.xd.dirt.plugins.job.support.listener.SimpleXdChunkListener.java

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/*
 * Copyright 2002-2013 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
 *
 *      http://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.xd.dirt.plugins.job.support.listener;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.batch.core.ChunkListener;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.messaging.SubscribableChannel;

/**
 * @author Gunnar Hillert
 * @author Ilayaperumal Gopinathan
 * @since 1.0
 */
public class SimpleXdChunkListener extends BatchJobListener<ChunkContextInfo> implements ChunkListener {

    private static final Log logger = LogFactory.getLog(SimpleXdChunkListener.class);

    public SimpleXdChunkListener(SubscribableChannel chunkEventsChannel,
            SubscribableChannel aggregatedEventsChannel) {
        super(chunkEventsChannel, aggregatedEventsChannel);
    }

    @Override
    public void afterChunk(ChunkContext context) {
        if (logger.isDebugEnabled()) {
            logger.debug("Executing afterChunk: " + context);
        }
        publish(convertChunkContext(context));
    }

    @Override
    public void beforeChunk(ChunkContext context) {
        if (logger.isDebugEnabled()) {
            logger.debug("Executing beforeChunk: " + context);
        }
        publish(convertChunkContext(context));
    }

    @Override
    public void afterChunkError(ChunkContext context) {
        if (logger.isDebugEnabled()) {
            logger.debug("Executing afterChunkError: " + context);
        }
        publish(convertChunkContext(context));
    }

    private ChunkContextInfo convertChunkContext(ChunkContext context) {

        final ChunkContextInfo chunkContextInfo = new ChunkContextInfo();
        chunkContextInfo.setComplete(context.isComplete());
        chunkContextInfo.setStepExecution(context.getStepContext().getStepExecution());

        final String[] attributeNames = context.attributeNames();

        for (String attributeName : attributeNames) {
            final Object attribute = context.getAttribute(attributeName);
            chunkContextInfo.getAttributes().put(attributeName, attribute);
        }

        return chunkContextInfo;
    }
}