com.cloudera.llama.nm.LlamaNMAuxiliaryService.java Source code

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Here is the source code for com.cloudera.llama.nm.LlamaNMAuxiliaryService.java

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/**
 * 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 com.cloudera.llama.nm;

import com.cloudera.llama.server.AbstractMain;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.server.api.ApplicationInitializationContext;
import org.apache.hadoop.yarn.server.api.ApplicationTerminationContext;
import org.apache.hadoop.yarn.server.api.AuxiliaryService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.nio.ByteBuffer;

public class LlamaNMAuxiliaryService extends AuxiliaryService {
    private static final Logger LOG = LoggerFactory.getLogger(LlamaNMServer.class);

    private LlamaNMServer nmServer;

    protected LlamaNMAuxiliaryService() {
        super("llama_nm_plugin");
    }

    @Override
    protected void setConfig(Configuration conf) {
        super.setConfig(conf);
    }

    @Override
    protected synchronized void serviceStart() throws Exception {
        AbstractMain.logServerInfo();

        Configuration llamaConf = new Configuration(getConfig());
        llamaConf.addResource("llama-site.xml");
        LOG.info("Server: {}", LlamaNMServer.class.getName());
        LOG.info("-----------------------------------------------------------------");
        nmServer = new LlamaNMServer();
        nmServer.setConf(llamaConf);
        nmServer.start();
    }

    synchronized LlamaNMServer getNMServer() {
        return nmServer;
    }

    @Override
    public synchronized void serviceStop() {
        if (nmServer != null) {
            nmServer.stop();
            nmServer = null;
        }
        super.stop();
    }

    @Override
    public void initializeApplication(ApplicationInitializationContext applicationInitializationContext) {
    }

    @Override
    public void stopApplication(ApplicationTerminationContext applicationTerminationContext) {
    }

    @Override
    public ByteBuffer getMetaData() {
        return null;
    }
}