org.apache.nutch.util.CrawlTestUtil.java Source code

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Here is the source code for org.apache.nutch.util.CrawlTestUtil.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.nutch.util;

import org.apache.gora.query.Query;
import org.apache.gora.query.Result;
import org.apache.gora.store.DataStore;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.nutch.crawl.URLWebPage;
import org.apache.nutch.storage.Mark;
import org.apache.nutch.storage.WebPage;
import org.mortbay.jetty.Handler;
import org.mortbay.jetty.Server;
import org.mortbay.jetty.handler.DefaultHandler;
import org.mortbay.jetty.handler.HandlerList;
import org.mortbay.jetty.handler.ResourceHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class CrawlTestUtil {

    private static final Logger LOG = LoggerFactory.getLogger(CrawlTestUtil.class);

    /**
     * For now we need to manually construct our Configuration, because we need to
     * override the default one and it is currently not possible to use
     * dynamically set values.
     * 
     * @return
     * @deprecated Use {@link #createConfiguration()} instead
     */
    @Deprecated
    public static Configuration create() {
        return createConfiguration();
    }

    /**
     * For now we need to manually construct our Configuration, because we need to
     * override the default one and it is currently not possible to use
     * dynamically set values.
     * 
     * @return
     */
    public static Configuration createConfiguration() {
        Configuration conf = new Configuration();
        conf.addResource("nutch-default.xml");
        conf.addResource("nutch-site.xml");
        conf.addResource("crawl-tests.xml");
        return conf;
    }

    /**
     * Generate seedlist
     * 
     * @see TestInjector
     * @throws IOException
     */
    public static void generateSeedList(FileSystem fs, Path urlPath, List<String> contents) throws IOException {
        FSDataOutputStream out;
        Path file = new Path(urlPath, "urls.txt");
        fs.mkdirs(urlPath);
        out = fs.create(file);
        Iterator<String> iterator = contents.iterator();
        while (iterator.hasNext()) {
            String url = iterator.next();
            out.writeBytes(url);
            out.writeBytes("\n");
        }
        out.flush();
        out.close();
    }

    /**
     * Read entries from a data store
     * 
     * @return list of matching {@link URLWebPage} objects
     * @throws Exception
     */
    public static ArrayList<URLWebPage> readContents(DataStore<String, WebPage> store, Mark requiredMark,
            String... fields) throws Exception {
        ArrayList<URLWebPage> l = new ArrayList<URLWebPage>();

        Query<String, WebPage> query = store.newQuery();
        if (fields != null) {
            query.setFields(fields);
        }

        Result<String, WebPage> results = store.execute(query);
        while (results.next()) {
            try {
                WebPage page = results.get();
                String url = results.getKey();

                if (page == null)
                    continue;

                if (requiredMark != null && requiredMark.checkMark(page) == null)
                    continue;

                l.add(new URLWebPage(TableUtil.unreverseUrl(url), WebPage.newBuilder(page).build()));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return l;
    }

    /**
     * Creates a new JettyServer with one static root context
     * 
     * @param port
     *          port to listen to
     * @param staticContent
     *          folder where static content lives
     * @throws UnknownHostException
     */
    public static Server getServer(int port, String staticContent) throws UnknownHostException {
        Server webServer = new org.mortbay.jetty.Server(port);
        ResourceHandler handler = new ResourceHandler();
        handler.setResourceBase(staticContent);
        HandlerList handlers = new HandlerList();
        handlers.setHandlers(new Handler[] { handler, new DefaultHandler() });
        webServer.setHandler(handlers);
        return webServer;
    }
}