org.apache.drill.exec.store.dfs.TestDrillFileSystem.java Source code

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Here is the source code for org.apache.drill.exec.store.dfs.TestDrillFileSystem.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.drill.exec.store.dfs;

import org.apache.drill.exec.ops.OpProfileDef;
import org.apache.drill.exec.ops.OperatorStats;
import org.apache.drill.exec.proto.UserBitShared.OperatorProfile;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

import java.io.File;
import java.io.InputStream;
import java.io.PrintWriter;

import static org.junit.Assert.assertTrue;

public class TestDrillFileSystem {

    private static String tempFilePath;

    @BeforeClass
    public static void createTempFile() throws Exception {

        File tempFile;
        while (true) {
            tempFile = File.createTempFile("drillFSTest", ".txt");
            if (tempFile.exists()) {
                boolean success = tempFile.delete();
                if (success) {
                    break;
                }
            }
        }

        // Write some data
        PrintWriter printWriter = new PrintWriter(tempFile);
        for (int i = 1; i <= 200000; i++) {
            printWriter.println(String.format("%d, key_%d", i, i));
        }
        printWriter.close();

        tempFilePath = tempFile.getPath();
    }

    @Test
    public void testIOStats() throws Exception {
        DrillFileSystem dfs = null;
        InputStream is = null;
        Configuration conf = new Configuration();
        conf.set(FileSystem.FS_DEFAULT_NAME_KEY, "file:///");
        OpProfileDef profileDef = new OpProfileDef(0 /*operatorId*/, 0 /*operatorType*/, 0 /*inputCount*/);
        OperatorStats stats = new OperatorStats(profileDef, null /*allocator*/);

        // start wait time method in OperatorStats expects the OperatorStats state to be in "processing"
        stats.startProcessing();

        try {
            dfs = new DrillFileSystem(conf, stats);
            is = dfs.open(new Path(tempFilePath));

            byte[] buf = new byte[8000];
            while (is.read(buf, 0, buf.length) != -1) {
            }
        } finally {
            stats.stopProcessing();

            if (is != null) {
                is.close();
            }

            if (dfs != null) {
                dfs.close();
            }
        }

        OperatorProfile operatorProfile = stats.getProfile();
        assertTrue("Expected wait time is non-zero, but got zero wait time", operatorProfile.getWaitNanos() > 0);
    }

    @AfterClass
    public static void deleteTempFile() throws Exception {
        new File(tempFilePath).delete();
    }

}