com.continuuity.loom.scheduler.task.JobId.java Source code

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Here is the source code for com.continuuity.loom.scheduler.task.JobId.java

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/*
 * Copyright 2012-2014, Continuuity, Inc.
 *
 * 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 com.continuuity.loom.scheduler.task;

import com.google.common.base.Preconditions;

/**
 * Job ids are of the form clusterid-jobid, where ids are numeric.
 */
public class JobId {
    private final String clusterId;
    private final long jobNum;
    private final String id;

    /**
     * Convert a string representation of a job id into an object while validating that the string is correctly
     * formatted. Throws an IllegalArgumentException if the string is invalid.
     *
     * @param jobIdStr String representation of a job id.
     * @return converted JobId based on the input string.
     */
    public static JobId fromString(String jobIdStr) {
        int index = jobIdStr.indexOf("-");
        Preconditions.checkArgument(index > 0, "invalid job id string " + jobIdStr);
        String clusterId = jobIdStr.substring(0, index);

        Preconditions.checkArgument(jobIdStr.indexOf("-", index + 1) < 0, "invalid job id string " + jobIdStr);
        long jobNum = Long.valueOf(jobIdStr.substring(index + 1));

        return new JobId(clusterId, jobNum);
    }

    public JobId(String clusterId, long jobNum) {
        this.clusterId = clusterId;
        this.jobNum = jobNum;
        this.id = String.format("%s-%03d", clusterId, jobNum);
    }

    /**
     * Get the id of the cluster the job is for.
     *
     * @return Id of the cluster the job is for.
     */
    public String getClusterId() {
        return clusterId;
    }

    /**
     * Get the job number part of the id.
     *
     * @return Job number part of the id.
     */
    public long getJobNum() {
        return jobNum;
    }

    /**
     * Get the id as a string. Format is clusterid-jobid.
     *
     * @return Id as a string.
     */
    public String getId() {
        return id;
    }

    @Override
    public String toString() {
        return id;
    }
}