co.cask.cdap.operations.yarn.AbstractYarnStats.java Source code

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Here is the source code for co.cask.cdap.operations.yarn.AbstractYarnStats.java

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/*
 * Copyright  2016 Cask Data, 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 co.cask.cdap.operations.yarn;

import co.cask.cdap.operations.AbstractOperationalStats;
import com.google.common.annotations.VisibleForTesting;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.client.api.YarnClient;
import org.apache.hadoop.yarn.conf.YarnConfiguration;

/**
 * Base class for capturing stats from YARN.
 */
public abstract class AbstractYarnStats extends AbstractOperationalStats {
    @VisibleForTesting
    static final String SERVICE_NAME = "Yarn";

    protected final YarnConfiguration conf;

    protected AbstractYarnStats(Configuration conf) {
        this.conf = new YarnConfiguration(conf);
    }

    protected YarnClient createYARNClient() {
        YarnClient yarnClient = YarnClient.createYarnClient();
        yarnClient.init(conf);
        yarnClient.start();
        return yarnClient;
    }

    @Override
    public String getServiceName() {
        return SERVICE_NAME;
    }
}