org.duracloud.snapshot.service.impl.SpaceItemReader Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of snapshot-service-impl Show documentation

The newest version!

/*
 * The contents of this file are subject to the license and copyright
 * detailed in the LICENSE and NOTICE files at the root of the source
 * tree and available online at
 *
 *     http://duracloud.org/license/
 */
package org.duracloud.snapshot.service.impl;

import org.duracloud.common.model.ContentItem;
import org.duracloud.retrieval.source.RetrievalSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.batch.item.ItemReader;
import org.springframework.batch.item.NonTransientResourceException;
import org.springframework.batch.item.ParseException;
import org.springframework.batch.item.UnexpectedInputException;

/**
 * @author Erik Paulsson
 * Date: 1/31/14
 */
public class SpaceItemReader implements ItemReader {

    private static final Logger LOGGER =
        LoggerFactory.getLogger(SpaceItemReader.class);

    private RetrievalSource retrievalSource;

    public SpaceItemReader(RetrievalSource retrievalSource) {
        this.retrievalSource = retrievalSource;
    }

    @Override
    public synchronized ContentItem read()
        throws Exception, UnexpectedInputException, ParseException, NonTransientResourceException {

        try {
            ContentItem contentItem = retrievalSource.getNextContentItem();
            if (contentItem != null) {
                LOGGER.debug("contentItem: {}", contentItem.getContentId());
            } else {
                LOGGER.debug("contentItem is null");
            }
            return contentItem;

        } catch (Exception ex) {
            LOGGER.error("item read failed:  " + ex.getMessage(), ex);
            throw ex;
        }
    }
}