org.apache.beam.sdk.io.hcatalog.EmbeddedMetastoreService.java Source code

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Here is the source code for org.apache.beam.sdk.io.hcatalog.EmbeddedMetastoreService.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.beam.sdk.io.hcatalog;

import static org.apache.hive.hcatalog.common.HCatUtil.makePathASafeFileName;

import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.apache.hadoop.hive.cli.CliSessionState;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.CommandNeedRetryException;
import org.apache.hadoop.hive.ql.Driver;
import org.apache.hadoop.hive.ql.session.SessionState;

/**
 * Implementation of a light-weight embedded metastore. This class is a trimmed-down version of <a
 * href="https://github.com/apache/hive/blob/master
 * /hcatalog/core/src/test/java/org/apache/hive/hcatalog/mapreduce/HCatBaseTest.java">
 * https://github.com/apache/hive/blob/master/hcatalog/core/src/test/java/org/apache/hive/hcatalog/mapreduce
 * /HCatBaseTest.java </a>
 */
final class EmbeddedMetastoreService implements AutoCloseable {
    private final Driver driver;
    private final HiveConf hiveConf;
    private final SessionState sessionState;

    EmbeddedMetastoreService(String baseDirPath) throws IOException {
        FileUtils.forceDeleteOnExit(new File(baseDirPath));

        String hiveDirPath = makePathASafeFileName(baseDirPath + "/hive");
        String testDataDirPath = makePathASafeFileName(hiveDirPath + "/data/"
                + EmbeddedMetastoreService.class.getCanonicalName() + System.currentTimeMillis());
        String testWarehouseDirPath = makePathASafeFileName(testDataDirPath + "/warehouse");

        hiveConf = new HiveConf(getClass());
        hiveConf.setVar(HiveConf.ConfVars.PREEXECHOOKS, "");
        hiveConf.setVar(HiveConf.ConfVars.POSTEXECHOOKS, "");
        hiveConf.setBoolVar(HiveConf.ConfVars.HIVE_SUPPORT_CONCURRENCY, false);
        hiveConf.setVar(HiveConf.ConfVars.METASTOREWAREHOUSE, testWarehouseDirPath);
        hiveConf.setBoolVar(HiveConf.ConfVars.HIVEOPTIMIZEMETADATAQUERIES, true);
        hiveConf.setVar(HiveConf.ConfVars.HIVE_AUTHORIZATION_MANAGER,
                "org.apache.hadoop.hive.ql.security.authorization.plugin.sqlstd." + "SQLStdHiveAuthorizerFactory");
        hiveConf.set("test.tmp.dir", hiveDirPath);

        System.setProperty("derby.stream.error.file", "/dev/null");
        driver = new Driver(hiveConf);
        sessionState = SessionState.start(new CliSessionState(hiveConf));
    }

    /** Executes the passed query on the embedded metastore service. */
    void executeQuery(String query) throws CommandNeedRetryException {
        driver.run(query);
    }

    /** Returns the HiveConf object for the embedded metastore. */
    HiveConf getHiveConf() {
        return hiveConf;
    }

    @Override
    public void close() throws Exception {
        driver.close();
        sessionState.close();
    }
}