org.apache.hadoop.hive.service.JDBCExecuteThread.java Source code

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Here is the source code for org.apache.hadoop.hive.service.JDBCExecuteThread.java

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/**
* Tencent is pleased to support the open source community by making TDW available.
* Copyright (C) 2014 THL A29 Limited, a Tencent company. All rights reserved.
* 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 org.apache.hadoop.hive.service;

import java.io.ByteArrayOutputStream;

import java.io.PrintStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.Driver;
import org.apache.hadoop.hive.ql.session.SessionState;

public class JDBCExecuteThread implements Runnable {
    private Driver driver;
    private String user;
    private String cmd;
    private String dbName;
    public static final Log LOG = LogFactory.getLog(JDBCExecuteThread.class.getName());

    public void setUser(String username) {
        user = username;
    }

    public void setDriver(Driver dr) {
        driver = dr;
    }

    public void setCmd(String command) {
        cmd = command;
    }

    public void setDBName(String name) {
        dbName = name;
    }

    public void run() {
        SessionState session = new SessionState(new HiveConf(SessionState.class));
        SessionState.start(session);
        session.in = null;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ByteArrayOutputStream err = new ByteArrayOutputStream();
        session.out = new PrintStream(out);
        session.err = new PrintStream(err);

        SessionState ss = SessionState.get();
        if (ss == null || driver == null)
            return;

        ss.setiscli(true);
        ss.setUserName(user);
        ss.setDbName(dbName);

        driver.setProcessState(Driver.SQLProcessState.PROCESSING);
        int exeRet = driver.run(cmd);
        if (exeRet == 0)
            driver.setProcessState(Driver.SQLProcessState.COMPLETE);
        else
            driver.setProcessState(Driver.SQLProcessState.ERROR);

        String errorMessage = null;
        if (ss != null) {
            ss.get().out.flush();
            ss.get().err.flush();
        }
        if (exeRet != 0) {
            errorMessage = err.toString();
        }
        out.reset();
        err.reset();

        if (exeRet != 0) {
            driver.setErrorMsg("Query w/ errno: " + exeRet + " " + errorMessage);
        }
        if (exeRet == 0)
            driver.setProcessState(Driver.SQLProcessState.COMPLETE);
        else
            driver.setProcessState(Driver.SQLProcessState.ERROR);

        LOG.error("SQL execute end");
    }
}