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package eu.dnetlib.data.hadoop.action;
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import java.io.IOException;
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import java.io.StringWriter;
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import java.util.Map;
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import java.util.Map.Entry;
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import eu.dnetlib.data.hadoop.HadoopJob;
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import eu.dnetlib.data.hadoop.config.ClusterName;
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import eu.dnetlib.data.hadoop.mapred.MapreduceJobMonitor;
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import eu.dnetlib.data.hadoop.rmi.HadoopServiceException;
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import eu.dnetlib.data.hadoop.utils.JobProfile;
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import eu.dnetlib.data.hadoop.utils.ScanFactory;
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import eu.dnetlib.data.hadoop.utils.ScanProperties;
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import eu.dnetlib.enabling.tools.blackboard.BlackboardJob;
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import eu.dnetlib.miscutils.functional.xml.IndentXmlString;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.mapred.JobClient;
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import org.apache.hadoop.mapred.JobConf;
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import org.apache.hadoop.mapred.RunningJob;
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public class SubmitMapreduceJobAction extends AbstractSubmitAction {
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/**
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* logger.
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*/
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private static final Log log = LogFactory.getLog(SubmitMapreduceJobAction.class); // NOPMD by marko on 11/24/08 5:02 PM
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@Override
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public void submit(final JobCompletion callback, final BlackboardJob bbJob, final String jobName, final JobProfile jobProfile)
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throws HadoopServiceException {
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final ClusterName clusterName = ClusterName.valueOf(bbJob.getParameters().get("cluster"));
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try {
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final JobConf jobConf = prepareJob(getConf(clusterName), jobName, jobProfile, bbJob.getParameters());
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logJobDetails(jobConf);
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final JobClient jtClient = hadoopClientMap.getJtClient(clusterName);
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final RunningJob runningJob = jtClient.submitJob(jobConf);
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final String jobId = newJobId(clusterName, runningJob.getID().getId());
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jobRegistry.registerJob(
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HadoopJob.newInstance(jobId, clusterName, jobProfile, new MapreduceJobMonitor(jtClient, runningJob, callback)));
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} catch (final IOException e) {
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throw new HadoopServiceException("error executing hadoop job: " + jobName, e);
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}
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}
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protected JobConf prepareJob(final Configuration configuration, final String jobName, final JobProfile jobProfile, final Map<String, String> parameters)
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throws IOException, HadoopServiceException {
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log.info("creating job: " + jobName);
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final JobConf jobConf = new JobConf(configuration);
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jobConf.setJobName(jobName);
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jobConf.set("dnet.mapred.job.description", jobProfile.getDescription());
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final String jobLib = getJobLib(configuration, jobProfile);
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jobConf.setJar(new Path(jobLib).toString());
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set(jobConf, jobProfile.getJobDefinition());
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set(jobConf, parameters);
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// if we're reading from hbase table then we need also to set a scanner.
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final ScanProperties scanProperties = jobProfile.getScanProperties();
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if (jobProfile.getRequiredParams().contains("hbase.mapreduce.inputtable") && (scanProperties != null)) {
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jobConf.set("hbase.mapreduce.scan", ScanFactory.getScan(scanProperties));
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}
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return jobConf;
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}
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protected String getJobLib(final Configuration configuration, final JobProfile jobProfile) throws HadoopServiceException {
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String jobLib = getDefaultLibPath(configuration.get("fs.defaultFS"));
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if (jobProfile.getJobDefinition().containsKey("job.lib")) {
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jobLib = jobProfile.getJobDefinition().get("job.lib");
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}
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if ((jobLib == null) || jobLib.isEmpty()) throw new HadoopServiceException("job.lib must refer to an absolute or relative HDFS path");
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if (!jobLib.startsWith("hdfs://")) {
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jobLib = configuration.get("fs.defaultFS") + jobLib;
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}
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log.info("using job.lib: " + jobLib);
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return jobLib;
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}
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protected void set(final JobConf jobConf, final Map<String, String> properties) {
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for (final Entry<String, String> e : properties.entrySet()) {
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if (checkHdfsProperty(e)) {
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final String v = jobConf.get("fs.defaultFS") + e.getValue();
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e.setValue(v);
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}
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jobConf.set(e.getKey(), e.getValue());
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}
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}
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protected void logJobDetails(final JobConf jobConf) {
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final StringWriter sw = new StringWriter();
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try {
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jobConf.writeXml(sw);
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if (log.isDebugEnabled()) {
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log.debug("\n" + IndentXmlString.apply(sw.toString()));
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}
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} catch (final IOException e) {
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log.warn("unable to log job details: " + jobConf.getJobName());
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}
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}
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}
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