org.apache.nutch.admin.management.CrawldbThread.java Source code

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Here is the source code for org.apache.nutch.admin.management.CrawldbThread.java

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/**
 * Copyright 2005 The Apache Software Foundation
 *
 * 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.nutch.admin.management;

import org.apache.hadoop.fs.Path;
import java.io.IOException;
import java.util.logging.Logger;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.nutch.admin.TaskThread;
import org.apache.nutch.crawl.CrawlDb;

/**
 * Runs a crawlDB task
 * 
 */
public class CrawldbThread extends TaskThread {

    private CrawlDb fCrawldb;

    private Path fSegment;

    private Path fCrawldbFile;

    private static final Logger LOG = Logger.getLogger(CrawldbThread.class.getName());

    public CrawldbThread(Configuration configuration, Path crawldb, Path segment) {
        super(configuration);
        this.fCrawldb = new CrawlDb(configuration);
        this.fCrawldbFile = crawldb;
        this.fSegment = segment;
    }

    public void run() {

        Path runningSegment = null;
        Path runningDB = null;
        FileSystem fileSystem = null;
        try {
            this.fMessage = "crawldb.running";
            fileSystem = FileSystem.get(this.fConfiguration);
            runningSegment = new Path(this.fSegment, "crawldb.running");
            runningDB = new Path(this.fCrawldbFile, "crawldb.running");
            fileSystem.createNewFile(runningSegment);
            fileSystem.createNewFile(runningDB);
            // this.fCrawldb.update(this.fCrawldbFile, this.fSegment, true, true);
            Path[] segs = new Path[1];
            segs[0] = this.fSegment;
            this.fCrawldb.update(this.fCrawldbFile, segs, true, true);

        } catch (IOException e) {
            LOG.warning(e.toString());
            this.fMessage = e.toString();
        } finally {
            try {
                if (fileSystem != null) {
                    fileSystem.delete(runningSegment);
                    fileSystem.delete(runningDB);
                }
            } catch (IOException e) {
                LOG.warning(e.toString());
            }
        }
    }
}