io.hops.util.impl.pb.LiveRMsResponsePBImpl.java Source code

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Here is the source code for io.hops.util.impl.pb.LiveRMsResponsePBImpl.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;

import io.hops.util.ActiveRM;
import io.hops.util.LiveRMsResponse;
import io.hops.util.SortedActiveRMList;
import org.apache.hadoop.yarn.api.records.impl.pb.ProtoBase;
import org.apache.hadoop.yarn.proto.GroupMembership.ActiveRMListResponseProto;
import org.apache.hadoop.yarn.proto.GroupMembership.ActiveRMListRequestProto;
import org.apache.hadoop.yarn.proto.GroupMembership.ActiveRMListResponseProtoOrBuilder;

//TODO change it to avoid going through the proto when it is not needed
public class LiveRMsResponsePBImpl extends ProtoBase<ActiveRMListResponseProto> implements LiveRMsResponse {
    ActiveRMListResponseProto proto = ActiveRMListResponseProto.getDefaultInstance();
    ActiveRMListResponseProto.Builder builder = null;
    boolean viaProto = false;

    public LiveRMsResponsePBImpl() {
        builder = ActiveRMListResponseProto.newBuilder();
    }

    public LiveRMsResponsePBImpl(ActiveRMListResponseProto proto) {
        this.proto = proto;
        viaProto = true;
    }

    public ActiveRMListResponseProto getProto() {
        mergeLocalToProto();
        proto = viaProto ? proto : builder.build();
        viaProto = true;
        return proto;
    }

    private void mergeLocalToProto() {
        if (viaProto) {
            maybeInitBuilder();
        }
        proto = builder.build();
        viaProto = true;
    }

    private void maybeInitBuilder() {
        if (viaProto || builder == null) {
            builder = ActiveRMListResponseProto.newBuilder(proto);
        }
        viaProto = false;
    }

    @Override
    public SortedActiveRMList getLiveRMsList() {
        ActiveRMListResponseProtoOrBuilder p = viaProto ? proto : builder;

        return new SortedActiveRMList(p.getActiveRmsList());
    }

    @Override
    public ActiveRM getLeader() {
        return (ActiveRM) getLiveRMsList().getLeader();
    }

    @Override
    public void setLiveRMsList(SortedActiveRMList list) {
        maybeInitBuilder();

        builder.setActiveRmsList(((SortedActiveRMList) list).getProto());
    }

}