io.hops.util.impl.pb.client.GroupMembershipPBClientImpl.java Source code

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Here is the source code for io.hops.util.impl.pb.client.GroupMembershipPBClientImpl.java

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/*
 * Copyright (C) 2015 hops.io.
 *
 * 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 io.hops.util.impl.pb.client;

import com.google.protobuf.ServiceException;
import io.hops.util.GroupMembership;
import io.hops.util.GroupMembershipPB;
import io.hops.util.LiveRMsResponse;
import io.hops.util.impl.pb.LiveRMsResponsePBImpl;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.ProtobufRpcEngine;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.yarn.ipc.RPCUtil;
import org.apache.hadoop.yarn.proto.GroupMembership.ActiveRMListRequestProto;

import java.io.Closeable;
import java.io.IOException;
import java.net.InetSocketAddress;

public class GroupMembershipPBClientImpl implements GroupMembership, Closeable {
    private GroupMembershipPB proxy;

    public GroupMembershipPBClientImpl(long clientVersion, InetSocketAddress addr, Configuration conf)
            throws IOException {
        RPC.setProtocolEngine(conf, GroupMembershipPB.class, ProtobufRpcEngine.class);
        proxy = (GroupMembershipPB) RPC.getProxy(GroupMembershipPB.class, clientVersion, addr, conf);
    }

    @Override
    public void close() {
        if (this.proxy != null) {
            RPC.stopProxy(this.proxy);
        }
    }

    @Override
    public LiveRMsResponse getLiveRMList() throws IOException, YarnException {
        ActiveRMListRequestProto requestProto = ActiveRMListRequestProto.getDefaultInstance();
        try {
            return new LiveRMsResponsePBImpl(proxy.getLiveRMList(null, requestProto));
        } catch (ServiceException e) {
            RPCUtil.unwrapAndThrowException(e);
            return null;
        }
    }
}