org.apache.tajo.storage.v2.FileScanRunner.java Source code

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Here is the source code for org.apache.tajo.storage.v2.FileScanRunner.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.storage.v2;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.util.concurrent.atomic.AtomicInteger;

public class FileScanRunner extends Thread {
    private static final Log LOG = LogFactory.getLog(FileScanRunner.class);

    StorageManagerV2.StorgaeManagerContext smContext;
    FileScannerV2 fileScanner;
    Object requestQueueMonitor;
    AtomicInteger numOfRunningScanners;
    DiskFileScanScheduler diskFileScanScheduler;

    int maxReadBytes;

    public FileScanRunner(DiskFileScanScheduler diskFileScanScheduler,
            StorageManagerV2.StorgaeManagerContext smContext, FileScannerV2 fileScanner, Object requestQueueMonitor,
            AtomicInteger numOfRunningScanners) {
        super("FileScanRunner:" + fileScanner.getId());
        this.diskFileScanScheduler = diskFileScanScheduler;
        this.fileScanner = fileScanner;
        this.smContext = smContext;
        this.requestQueueMonitor = requestQueueMonitor;
        this.numOfRunningScanners = numOfRunningScanners;

        this.maxReadBytes = smContext.getMaxReadBytesPerScheduleSlot();
    }

    public void run() {
        try {
            //      long startTime = System.currentTimeMillis();
            //      boolean fetching = fileScanner.isFetchProcessing();
            fileScanner.scan(maxReadBytes);
            //      if(diskFileScanScheduler.getDiskId() == 1) {
            //        LOG.info("========>" + diskFileScanScheduler.getDiskId() + "," + fileScanner.getId() +
            //            ",fetching=" + fetching +
            //            ", scanTime:" + (System.currentTimeMillis() - startTime) + " ms");
            //      }
        } catch (Exception e) {
            LOG.error(e.getMessage(), e);
        } finally {
            synchronized (requestQueueMonitor) {
                numOfRunningScanners.decrementAndGet();
                requestQueueMonitor.notifyAll();
            }
        }
    }
}