org.obiba.onyx.core.batch.OnyxJobDetailDelegate.java Source code

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Here is the source code for org.obiba.onyx.core.batch.OnyxJobDetailDelegate.java

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/*******************************************************************************
 * Copyright 2008(c) The OBiBa Consortium. All rights reserved.
 * 
 * This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package org.obiba.onyx.core.batch;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.obiba.core.util.StringUtil;
import org.quartz.JobExecutionContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobParameter;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.JobParametersBuilder;
import org.springframework.batch.core.configuration.JobLocator;
import org.springframework.batch.core.launch.JobOperator;
import org.springframework.scheduling.quartz.QuartzJobBean;

/**
 * Used to execute a Spring Batch defined job with the Quartz scheduler.
 */
public class OnyxJobDetailDelegate extends QuartzJobBean {

    /**
     * Special key in job data map for the name of a job to run.
     */
    static final String JOB_NAME = "jobName";

    private static Logger log = LoggerFactory.getLogger(OnyxJobDetailDelegate.class);

    private JobLocator jobLocator;

    private JobOperator jobOperator;

    /**
     * Public setter for the {@link JobLocator}.
     * @param jobLocator the {@link JobLocator} to set
     */
    public void setJobLocator(JobLocator jobLocator) {
        this.jobLocator = jobLocator;
    }

    /**
     * Public setter for the {@link JobOperator}.
     * @param jobOperator the {@link JobOperator} to set
     */
    public void setJobOperator(JobOperator jobOperator) {
        this.jobOperator = jobOperator;
    }

    @SuppressWarnings("unchecked")
    protected void executeInternal(JobExecutionContext context) {
        Map<String, Object> jobDataMap = context.getMergedJobDataMap();
        String jobName = (String) jobDataMap.get(JOB_NAME);
        log.info("Quartz trigger firing with Spring Batch jobName=" + jobName);

        try {
            Job job = jobLocator.getJob(jobName);
            if (job.getJobParametersIncrementer() != null) {
                jobOperator.startNextInstance(jobName);
            } else {
                JobParameters jobParameters = getJobParametersFromJobMap(jobDataMap);
                jobOperator.start(jobName, toKeyValueCommaDelimitedString(jobParameters));
            }
        } catch (Exception e) {
            log.error("Could not execute job.", e);
        }
    }

    /*
     * Copy parameters that are of the correct type over to {@link JobParameters}, ignoring jobName.
     * 
     * @return a {@link JobParameters} instance
     */
    private JobParameters getJobParametersFromJobMap(Map<String, Object> jobDataMap) {

        JobParametersBuilder builder = new JobParametersBuilder();

        for (Entry<String, Object> entry : jobDataMap.entrySet()) {
            String key = entry.getKey();
            Object value = entry.getValue();
            if (value instanceof String && !key.equals(JOB_NAME)) {
                builder.addString(key, (String) value);
            } else if (value instanceof Float || value instanceof Double) {
                builder.addDouble(key, ((Number) value).doubleValue());
            } else if (value instanceof Integer || value instanceof Long) {
                builder.addLong(key, ((Number) value).longValue());
            } else if (value instanceof Date) {
                builder.addDate(key, (Date) value);
            } else {
                log.debug("JobDataMap contains values which are not job parameters (ignoring).");
            }
        }

        return builder.toJobParameters();

    }

    private String toKeyValueCommaDelimitedString(JobParameters jobParameters) {
        if (jobParameters.getParameters().size() != 0) {
            List<String> keyValuePairs = new ArrayList<String>();
            for (Map.Entry<String, JobParameter> entry : jobParameters.getParameters().entrySet()) {
                keyValuePairs.add(entry.getKey() + '=' + entry.getValue());
            }
            return StringUtil.collectionToString(keyValuePairs);
        }
        return null;
    }
}