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

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Here is the source code for org.apache.nutch.admin.management.IndexThread.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.indexer.Indexer;

import java.util.List;
import java.util.Arrays;

public class IndexThread extends TaskThread {

    private Indexer fIndexer;

    private Path fCrawldb;

    private Path fLinkdb;

    private Path[] fSegments;

    private Path fIndexFolder;

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

    public IndexThread(Configuration configuration, Path indexFolder, Path crawldb, Path linkdb, Path[] segments) {
        super(configuration);
        this.fIndexer = new Indexer(configuration);
        this.fIndexFolder = indexFolder;
        this.fCrawldb = crawldb;
        this.fLinkdb = linkdb;
        this.fSegments = segments;

    }

    public void run() {
        FileSystem fileSystem = null;
        try {
            this.fMessage = "index.running";
            fileSystem = FileSystem.get(this.fConfiguration);

            // create lock files in segments
            for (int i = 0; i < this.fSegments.length; i++) {
                Path file = this.fSegments[i];
                fileSystem.createNewFile(new Path(file, "index.running"));
            }

            // create lock files in linkdb
            fileSystem.createNewFile(new Path(this.fLinkdb, "index.running"));
            // create lock files in crawldb
            fileSystem.createNewFile(new Path(this.fCrawldb, "index.running"));

            // this.fIndexer.index(
            //     this.fIndexFolder, 
            //     this.fCrawldb, 
            //     this.fLinkdb,
            //     this.fSegments
            //     );
            List<Path> seglist = Arrays.asList(this.fSegments);
            this.fIndexer.index(this.fIndexFolder, this.fCrawldb, this.fLinkdb, seglist);

        } catch (IOException e) {
            LOG.warn(e.toString());
            this.fMessage = e.toString();
        } finally {
            try {
                if (fileSystem != null) {
                    // delete lock files from segments
                    for (int i = 0; i < this.fSegments.length; i++) {
                        Path file = this.fSegments[i];
                        fileSystem.delete(new Path(file, "index.running"));
                    }
                    // delete lock files from linkdb
                    fileSystem.delete(new Path(this.fLinkdb, "index.running"));
                    // delete lock files from crawldb
                    fileSystem.delete(new Path(this.fCrawldb, "index.running"));
                }
            } catch (IOException e) {
                LOG.warn(e.toString());
            }
        }
    }
}