SLURMEmailParser.java

/**
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.airavata.gfac.monitor.email.parser;

import org.apache.airavata.common.exception.AiravataException;
import org.apache.airavata.gfac.core.monitor.EmailParser;
import org.apache.airavata.gfac.core.monitor.JobStatusResult;
import org.apache.airavata.model.status.JobState;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.mail.Message;
import javax.mail.MessagingException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class SLURMEmailParser implements EmailParser {

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

    private static final String REGEX = "[A-Z]*\\s[a-zA-Z]*_[a-z]*=(?<" + JOBID + ">\\d*)[ ]*[a-zA-Z]*=(?<"+
            JOBNAME + ">[a-zA-Z0-9-]*)[ ]*(?<" + STATUS + ">[]a-zA-Z ]*),.*";

    public static final String BEGAN = "Began";
    public static final String STAGE_OUT = "Staged Out";
    public static final String ENDED = "Ended";
    public static final String FAILED = "Failed";
    private static final Pattern cancelledStatePattern = Pattern.compile("CANCELLED");
    private static final Pattern pattern = Pattern.compile(REGEX);

    @Override
    public JobStatusResult parseEmail(Message message) throws MessagingException, AiravataException{
        JobStatusResult jobStatusResult = new JobStatusResult();
        parseSubject(message.getSubject(), jobStatusResult);
        return jobStatusResult;
    }

    private void parseSubject(String subject, JobStatusResult jobStatusResult) throws MessagingException {
        Matcher matcher = pattern.matcher(subject);
        if (matcher.find()) {
            jobStatusResult.setJobId(matcher.group(JOBID));
            jobStatusResult.setJobName(matcher.group(JOBNAME));
            jobStatusResult.setState(getJobState(matcher.group(STATUS), subject));
        } else {
            log.error("[EJM]: No matched found for subject -> " + subject);
        }
    }

    private JobState getJobState(String state, String subject) {
        switch (state.trim()) {
            case BEGAN: case STAGE_OUT:
                return JobState.ACTIVE;
            case ENDED:
                Matcher matcher = cancelledStatePattern.matcher(subject);
                if (matcher.find()) {
                   return JobState.CANCELED;
                }
                return JobState.COMPLETE;
            case FAILED:
                return JobState.FAILED;
            default:
                log.error("[EJM]: Job State " + state + " isn't handle by SLURM parser");
                return JobState.UNKNOWN;

        }
    }

}