org.apache.tajo.worker.TajoWorkerClientService.java Source code

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Here is the source code for org.apache.tajo.worker.TajoWorkerClientService.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 org.apache.tajo.worker;

import com.google.protobuf.RpcController;
import com.google.protobuf.ServiceException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.service.AbstractService;
import org.apache.tajo.QueryId;
import org.apache.tajo.conf.TajoConf;
import org.apache.tajo.exception.ReturnStateUtil;
import org.apache.tajo.ipc.ClientProtos.GetQueryHistoryResponse;
import org.apache.tajo.ipc.ClientProtos.QueryIdRequest;
import org.apache.tajo.ipc.QueryMasterClientProtocol;
import org.apache.tajo.rpc.BlockingRpcServer;
import org.apache.tajo.util.NetUtils;
import org.apache.tajo.util.TUtil;
import org.apache.tajo.util.history.QueryHistory;

import java.net.InetSocketAddress;

@Deprecated
public class TajoWorkerClientService extends AbstractService {
    private static final Log LOG = LogFactory.getLog(TajoWorkerClientService.class);

    private BlockingRpcServer rpcServer;
    private InetSocketAddress bindAddr;

    private TajoWorker.WorkerContext workerContext;
    private TajoWorkerClientProtocolServiceHandler serviceHandler;

    public TajoWorkerClientService(TajoWorker.WorkerContext workerContext) {
        super(TajoWorkerClientService.class.getName());

        this.workerContext = workerContext;
    }

    @Override
    public void serviceInit(Configuration conf) throws Exception {
        TajoConf tajoConf = TUtil.checkTypeAndGet(conf, TajoConf.class);

        this.serviceHandler = new TajoWorkerClientProtocolServiceHandler();

        // init RPC Server in constructor cause Heartbeat Thread use bindAddr
        try {
            InetSocketAddress initIsa = tajoConf.getSocketAddrVar(TajoConf.ConfVars.WORKER_CLIENT_RPC_ADDRESS);
            if (initIsa.getAddress() == null) {
                throw new IllegalArgumentException("Failed resolve of " + initIsa);
            }

            int workerNum = tajoConf.getIntVar(TajoConf.ConfVars.WORKER_SERVICE_RPC_SERVER_WORKER_THREAD_NUM);
            this.rpcServer = new BlockingRpcServer(QueryMasterClientProtocol.class, serviceHandler, initIsa,
                    workerNum);
            this.rpcServer.start();

            this.bindAddr = NetUtils.getConnectAddress(rpcServer.getListenAddress());
        } catch (Exception e) {
            LOG.error(e.getMessage(), e);
        }
        // Get the master address
        LOG.info(TajoWorkerClientService.class.getSimpleName() + " is bind to " + bindAddr);
        tajoConf.setVar(TajoConf.ConfVars.WORKER_CLIENT_RPC_ADDRESS, NetUtils.getHostPortString(bindAddr));
        super.serviceInit(tajoConf);
    }

    @Override
    public void serviceStop() throws Exception {
        LOG.info("TajoWorkerClientService stopping");
        if (rpcServer != null) {
            rpcServer.shutdown();
        }
        LOG.info("TajoWorkerClientService stopped");
        super.serviceStop();
    }

    public InetSocketAddress getBindAddr() {
        return bindAddr;
    }

    public class TajoWorkerClientProtocolServiceHandler
            implements QueryMasterClientProtocol.QueryMasterClientProtocolService.BlockingInterface {

        @Override
        public GetQueryHistoryResponse getQueryHistory(RpcController controller, QueryIdRequest request)
                throws ServiceException {
            GetQueryHistoryResponse.Builder builder = GetQueryHistoryResponse.newBuilder();

            try {
                QueryId queryId = new QueryId(request.getQueryId());
                QueryHistory queryHistory = workerContext.getQueryMaster().getQueryHistory(queryId);

                if (queryHistory != null) {
                    builder.setQueryHistory(queryHistory.getProto());
                }
                builder.setState(ReturnStateUtil.OK);
            } catch (Throwable t) {
                LOG.error(t.getMessage(), t);
                builder.setState(ReturnStateUtil.returnError(t));
            }

            return builder.build();
        }
    }
}