tajo.impl.pb.QueryIdPBImpl.java Source code

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Here is the source code for tajo.impl.pb.QueryIdPBImpl.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 tajo.impl.pb;

import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationIdPBImpl;
import org.apache.hadoop.yarn.proto.YarnProtos;
import tajo.QueryId;
import tajo.common.ProtoObject;
import tajo.engine.TCommonProtos.QueryIdProto;
import tajo.engine.TCommonProtos.QueryIdProtoOrBuilder;

import java.text.NumberFormat;

/**
 * The protocol implementation of QueryId
 */
public class QueryIdPBImpl extends QueryId implements ProtoObject<QueryIdProto> {
    public static final String PREFIX = "query";
    public static final String SEPARATOR = "_";

    static final ThreadLocal<NumberFormat> queryIdFormat = new ThreadLocal<NumberFormat>() {
        @Override
        public NumberFormat initialValue() {
            NumberFormat fmt = NumberFormat.getInstance();
            fmt.setGroupingUsed(false);
            fmt.setMinimumIntegerDigits(4);
            return fmt;
        }
    };

    private QueryIdProto proto = QueryIdProto.getDefaultInstance();
    private QueryIdProto.Builder builder = null;
    private boolean viaProto = false;

    private ApplicationId appId;

    public QueryIdPBImpl() {
        builder = QueryIdProto.newBuilder();
    }

    public QueryIdPBImpl(QueryIdProto proto) {
        this.proto = proto;
        viaProto = true;
    }

    @Override
    public synchronized ApplicationId getAppId() {
        QueryIdProtoOrBuilder p = viaProto ? proto : builder;
        if (appId != null) {
            return appId;
        } // Else via proto
        if (!p.hasAppId()) {
            return null;
        }
        appId = convertFromProtoFormat(p.getAppId());
        return appId;
    }

    @Override
    public synchronized void setAppId(ApplicationId appId) {
        maybeInitBuilder();
        if (appId == null) {
            builder.clearAppId();
        }
        this.appId = appId;
    }

    @Override
    public synchronized int getId() {
        QueryIdProtoOrBuilder p = viaProto ? proto : builder;
        return (p.getId());
    }

    @Override
    public synchronized void setId(int id) {
        maybeInitBuilder();
        builder.setId((id));
    }

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

    private synchronized void mergeLocalToBuilder() {
        if (this.appId != null && !((ApplicationIdPBImpl) this.appId).getProto().equals(builder.getAppId())) {
            builder.setAppId(convertToProtoFormat(this.appId));
        }
    }

    @Override
    public QueryIdProto getProto() {
        if (!viaProto) {
            mergeLocalToBuilder();
            proto = builder.build();
            viaProto = true;
        }
        return proto;
    }

    private void mergeProtoToLocal() {
        QueryIdProtoOrBuilder p = viaProto ? proto : builder;
        if (appId == null) {
            appId = convertFromProtoFormat(p.getAppId());
        }
    }

    @Override
    public void initFromProto() {
        mergeProtoToLocal();
    }

    private ApplicationIdPBImpl convertFromProtoFormat(YarnProtos.ApplicationIdProto p) {
        return new ApplicationIdPBImpl(p);
    }

    private YarnProtos.ApplicationIdProto convertToProtoFormat(ApplicationId t) {
        return ((ApplicationIdPBImpl) t).getProto();
    }
}