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

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Here is the source code for com.cloudera.llama.nm.LlamaNMServer.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.ClientNotificationService;
import com.cloudera.llama.server.ServerConfiguration;
import com.cloudera.llama.server.ThriftServer;
import com.cloudera.llama.thrift.LlamaNMService;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.thrift.TProcessor;

import java.io.File;
import java.net.URL;

public class LlamaNMServer extends ThriftServer<LlamaNMService.Processor, TProcessor> {
    private Configuration conf;
    private ClientNotificationService clientNotificationService;
    private Resource totalCapacity;

    protected LlamaNMServer() {
        super("llama.nm", NMServerConfiguration.class);
    }

    @Override
    public void setConf(Configuration conf) {
        this.conf = new Configuration(conf);
        URL url = Thread.currentThread().getContextClassLoader().getResource("yarn-site.xml");
        if (url == null) {
            throw new RuntimeException("'yarn-site.xml' file not found in classpath");
        }
        if (!url.getProtocol().equals("file")) {
            throw new RuntimeException("File 'yarn-site.xml' is in a JAR, it should" + " be in a directory");
        }
        String confDir = new File(url.getPath()).getParent();
        conf.set(ServerConfiguration.CONFIG_DIR_KEY, confDir);
        super.setConf(conf);
    }

    @Override
    protected void startService() {
        int memoryMb = conf.getInt(YarnConfiguration.NM_PMEM_MB, YarnConfiguration.DEFAULT_NM_PMEM_MB);
        int virtualCores = conf.getInt(YarnConfiguration.NM_VCORES, YarnConfiguration.DEFAULT_NM_VCORES);
        totalCapacity = Resource.newInstance(memoryMb, virtualCores);

        try {
            clientNotificationService = new ClientNotificationService(getServerConf(), null, getMetricRegistry());
            clientNotificationService.start();
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }
    }

    @Override
    protected void stopService() {
        clientNotificationService.stop();
    }

    @Override
    protected LlamaNMService.Processor createServiceProcessor() {
        LlamaNMService.Iface handler = new LlamaNMServiceImpl(clientNotificationService);
        return new LlamaNMService.Processor<LlamaNMService.Iface>(handler);
    }

}