org.apache.tajo.LocalTajoTestingUtility.java Source code

Introduction

Here is the source code for org.apache.tajo.LocalTajoTestingUtility.java

Source

/**
 * 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;

import com.google.common.base.Preconditions;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.tajo.benchmark.TPCH;
import org.apache.tajo.catalog.CatalogUtil;
import org.apache.tajo.catalog.Schema;
import org.apache.tajo.catalog.TableDesc;
import org.apache.tajo.catalog.TableMeta;
import org.apache.tajo.catalog.statistics.TableStats;
import org.apache.tajo.client.TajoClient;
import org.apache.tajo.conf.TajoConf;
import org.apache.tajo.engine.planner.global.MasterPlan;
import org.apache.tajo.engine.query.QueryContext;
import org.apache.tajo.exception.TajoException;
import org.apache.tajo.schema.IdentifierUtil;
import org.apache.tajo.session.Session;
import org.apache.tajo.util.CommonTestingUtil;
import org.apache.tajo.util.FileUtil;
import org.apache.tajo.util.TajoIdUtils;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.sql.ResultSet;
import java.util.UUID;

public class LocalTajoTestingUtility {
    private static final Log LOG = LogFactory.getLog(LocalTajoTestingUtility.class);

    private TajoTestingCluster util;
    private TajoConf conf;
    private TajoClient client;

    private static UserGroupInformation dummyUserInfo;

    static {
        try {
            dummyUserInfo = UserGroupInformation.getCurrentUser();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int taskAttemptId;

    public static TaskAttemptId newTaskAttemptId() {
        return QueryIdFactory.newTaskAttemptId(
                QueryIdFactory.newTaskId(new MasterPlan(newQueryId(), null, null).newExecutionBlockId()),
                taskAttemptId++);
    }

    public static TaskAttemptId newTaskAttemptId(MasterPlan plan) {
        return QueryIdFactory.newTaskAttemptId(QueryIdFactory.newTaskId(plan.newExecutionBlockId()), 0);
    }

    public static Session createDummySession() {
        return new Session(UUID.randomUUID().toString(), dummyUserInfo.getUserName(),
                TajoConstants.DEFAULT_DATABASE_NAME);
    }

    public static QueryContext createDummyContext(TajoConf conf) {
        QueryContext context = new QueryContext(conf, createDummySession());
        context.putAll(CommonTestingUtil.getSessionVarsForTest().getAllKeyValus());
        return context;
    }

    /**
     * for test
     * @return The generated QueryId
     */
    public synchronized static QueryId newQueryId() {
        return QueryIdFactory.newQueryId(TajoIdUtils.MASTER_ID_FORMAT.format(0));
    }

    public void setup(String[] names, String[] tablepaths, Schema[] schemas) throws Exception {
        LOG.info("===================================================");
        LOG.info("Starting Test Cluster.");
        LOG.info("===================================================");

        util = new TajoTestingCluster();
        util.startMiniCluster(1);
        conf = util.getConfiguration();
        client = util.newTajoClient();

        FileSystem fs = util.getDefaultFileSystem();
        Path rootDir = TajoConf.getWarehouseDir(conf);
        fs.mkdirs(rootDir);
        for (int i = 0; i < tablepaths.length; i++) {
            Path localPath = new Path(tablepaths[i]);
            Path tablePath = new Path(rootDir, names[i]);
            fs.mkdirs(tablePath);
            Path dfsPath = new Path(tablePath, localPath.getName());
            fs.copyFromLocalFile(localPath, dfsPath);
            TableMeta meta = CatalogUtil.newTableMeta(BuiltinStorages.TEXT, conf);

            // Add fake table statistic data to tables.
            // It gives more various situations to unit tests.
            TableStats stats = new TableStats();
            stats.setNumBytes(TPCH.tableVolumes.get(names[i]));
            TableDesc tableDesc = new TableDesc(
                    IdentifierUtil.buildFQName(TajoConstants.DEFAULT_DATABASE_NAME, names[i]), schemas[i], meta,
                    tablePath.toUri());
            tableDesc.setStats(stats);
            util.getMaster().getCatalog().createTable(tableDesc);
        }

        LOG.info("===================================================");
        LOG.info("Test Cluster ready and test table created.");
        LOG.info("===================================================");

    }

    public TajoTestingCluster getTestingCluster() {
        return util;
    }

    public ResultSet execute(String query) throws TajoException {
        return client.executeQueryAndGetResult(query);
    }

    public void shutdown() throws IOException {
        if (client != null) {
            client.close();
        }
        if (util != null) {
            util.shutdownMiniCluster();
        }
    }

    public static Path getResourcePath(String path, String suffix) {
        URL resultBaseURL = ClassLoader.getSystemResource(path);
        return new Path(resultBaseURL.toString(), suffix);
    }

    public static Path getResultPath(Class clazz, String fileName) {
        return new Path(getResourcePath("results", clazz.getSimpleName()), fileName);
    }

    public static String getResultText(Class clazz, String fileName) throws IOException {
        FileSystem localFS = FileSystem.getLocal(new Configuration());
        Path path = getResultPath(clazz, fileName);
        Preconditions.checkState(localFS.exists(path) && localFS.isFile(path));
        return FileUtil.readTextFile(new File(path.toUri()));
    }
}