azkaban.metric.GangliaMetricEmitter.java Source code

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Here is the source code for azkaban.metric.GangliaMetricEmitter.java

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/*
 * Copyright 2012 LinkedIn Corp.
 *
 * 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 azkaban.metric;

import org.apache.commons.collections.bag.SynchronizedBag;

import azkaban.utils.Props;

/**
 * MetricEmitter implementation to report metric to a ganglia gmetric process
 */
public class GangliaMetricEmitter implements IMetricEmitter {
    private static final String GANGLIA_METRIC_REPORTER_PATH = "azkaban.metric.ganglia.path";
    private String gmetricPath;

    /**
     * @param azkProps Azkaban Properties
     */
    public GangliaMetricEmitter(Props azkProps) {
        gmetricPath = azkProps.get(GANGLIA_METRIC_REPORTER_PATH);
    }

    private String buildCommand(IMetric<?> metric) {
        String cmd = null;

        synchronized (metric) {
            cmd = String.format("%s -t %s -n %s -v %s", gmetricPath, metric.getValueType(), metric.getName(),
                    metric.getValue().toString());
        }

        return cmd;
    }

    /**
     * Report metric by executing command line interface of gmetrics
     * {@inheritDoc}
     * @see azkaban.metric.IMetricEmitter#reportMetric(azkaban.metric.IMetric)
     */
    @Override
    public void reportMetric(final IMetric<?> metric) throws MetricException {
        String gangliaCommand = buildCommand(metric);

        if (gangliaCommand != null) {
            // executes shell command to report metric to ganglia dashboard
            try {
                Process emission = Runtime.getRuntime().exec(gangliaCommand);
                int exitCode;
                exitCode = emission.waitFor();
                if (exitCode != 0) {
                    throw new MetricException("Failed to report metric using gmetric");
                }
            } catch (Exception e) {
                throw new MetricException("Failed to report metric using gmetric");
            }
        } else {
            throw new MetricException("Failed to build ganglia Command");
        }
    }

    @Override
    public void purgeAllData() throws MetricException {

    }
}