io.hops.experiments.benchmarks.blockreporting.nn.HadoopNameNodeSelector.java Source code

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Here is the source code for io.hops.experiments.benchmarks.blockreporting.nn.HadoopNameNodeSelector.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 io.hops.experiments.benchmarks.blockreporting.nn;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.NameNodeProxies;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolClientSideTranslatorPB;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.URI;
import java.util.List;
import java.util.Map;

class HadoopNameNodeSelector implements BlockReportingNameNodeSelector {

    private final ClientProtocol clientProto;
    private final DatanodeProtocol datanodeProto;

    private BlockReportingNameNodeHandle nameNodeHandle = new BlockReportingNameNodeHandle() {
        @Override
        public ClientProtocol getRPCHandle() {
            return clientProto;
        }

        @Override
        public DatanodeProtocol getDataNodeRPC() {
            return datanodeProto;
        }

        @Override
        public String getHostName() {
            return host;
        }
    };

    private final List<BlockReportingNameNodeHandle> namenodes = Lists.newArrayList(nameNodeHandle);

    private int stats;
    private String host;

    HadoopNameNodeSelector(Configuration configuration, URI defaultUri) throws IOException {
        datanodeProto = new DatanodeProtocolClientSideTranslatorPB(NameNode.getAddress(configuration),
                configuration);
        NameNodeProxies.ProxyAndInfo<ClientProtocol> proxyInfo = NameNodeProxies.createProxy(configuration,
                defaultUri, ClientProtocol.class);
        clientProto = proxyInfo.getProxy();
        host = defaultUri.getHost();
    }

    @Override
    public BlockReportingNameNodeHandle getNextNameNodeRPCS() throws IOException {
        return nameNodeHandle;
    }

    @Override
    public BlockReportingNameNodeHandle getLeader() throws IOException {
        return nameNodeHandle;
    }

    @Override
    public DatanodeProtocol getNameNodeToReportTo(long blocksCount) throws IOException {
        stats++;
        return datanodeProto;
    }

    @Override
    public List<BlockReportingNameNodeHandle> getNameNodes() throws IOException {
        return namenodes;
    }

    @Override
    public Map<String, Integer> getReportsStats() {
        Map<String, Integer> statsMap = Maps.newHashMap();
        statsMap.put(host, stats);
        return statsMap;
    }
}