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

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Here is the source code for org.apache.nutch.admin.management.GenerateThread.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.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.Path;
import java.io.IOException;

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

public class GenerateThread extends TaskThread {

    private static final Log LOG = LogFactory.getLog(GenerateThread.class);

    private Generator fGenerator;

    private Path fCrawldb;

    private Path fSegmentFolder;

    private long fTopN;

    private long fDays;

    private int fFetcher;

    private boolean fError;

    public GenerateThread(Configuration configuration, Path crawldb, Path segmentFolder, String topN,
            String fetcher, String days) {

        super(configuration);

        this.fGenerator = new Generator(configuration);
        this.fCrawldb = crawldb;
        this.fSegmentFolder = segmentFolder;
        try {
            this.fTopN = Long.parseLong(topN);
            this.fDays = Long.parseLong(days);
            this.fFetcher = Integer.parseInt(fetcher);
        } catch (NumberFormatException e) {
            this.fMessage = "number.invalid";
            this.fError = true;
        }
    }

    public void run() {
        if (!this.fError) {
            FileSystem fileSystem = null;
            Path runningSegment = null;
            Path runningDB = null;
            try {
                this.fMessage = "generate.running";
                fileSystem = FileSystem.get(this.fConfiguration);
                runningSegment = new Path(this.fSegmentFolder, "generate.running");
                runningDB = new Path(this.fCrawldb, "generate.running");
                fileSystem.createNewFile(runningSegment);
                fileSystem.createNewFile(runningDB);
                long curTime = System.currentTimeMillis() + this.fDays * 1000L * 60 * 60 * 24;

                this.fGenerator.generate(this.fCrawldb, this.fSegmentFolder, this.fFetcher, this.fTopN, curTime,
                        true, true);

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