org.sbs.goodcrawler.urlmanager.PendingUrls.java Source code

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Here is the source code for org.sbs.goodcrawler.urlmanager.PendingUrls.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.sbs.goodcrawler.urlmanager;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.sbs.goodcrawler.conf.GlobalConstants;
import org.sbs.goodcrawler.conf.PropertyConfigurationHelper;
import org.sbs.goodcrawler.exception.QueueException;

/**
 * @author shenbaise(shenbaise@outlook.com)
 * @date 2013-6-29
 * @desc ?Urls
 */
public class PendingUrls implements Serializable {

    private static final long serialVersionUID = 2260258894389085989L;
    private Log log = LogFactory.getLog(this.getClass());
    private BlockingQueue<WebURL> Queue = null;
    private static PendingUrls instance = null;
    /**
     * URL?+1
     */
    private AtomicLong urlCount = new AtomicLong(0L);
    /**
     * ???URL
     */
    private AtomicLong success = new AtomicLong(0L);
    /**
     * ?URL
     */
    private AtomicInteger failure = new AtomicInteger(0);
    /**
     * ??job?
     */
    private AtomicLong ignored = new AtomicLong(0);

    /**
     * 
     */
    private PendingUrls() {
        init();
    }

    /**
     * @return
     * @desc 
     */
    public static PendingUrls getInstance() {
        if (null == instance) {
            instance = new PendingUrls();
        }
        return instance;
    }

    /**
     * @desc ?
     */
    private void init() {
        File file = new File(PropertyConfigurationHelper.getInstance().getString("status.save.path", "status")
                + File.separator + "urls.good");
        if (file.exists()) {
            try {
                FileInputStream fisUrl = new FileInputStream(file);
                ObjectInputStream oisUrl = new ObjectInputStream(fisUrl);
                instance = (PendingUrls) oisUrl.readObject();
                oisUrl.close();
                fisUrl.close();
                Queue = instance.Queue;
                failure = instance.failure;
                success = instance.success;
                urlCount = instance.urlCount;
                ignored = instance.ignored;
                System.out.println("recovery url queue..." + Queue.size());
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
        }
        if (null == Queue)
            Queue = new ArrayBlockingQueue<>(PropertyConfigurationHelper.getInstance()
                    .getInt(GlobalConstants.pendingUrlsQueueSize, 1000000));
    }

    /**
     * @param url
     * @desc ?URLUrl+1
     */
    public void addUrl(WebURL url) throws QueueException {
        try {
            if (null != url) {
                Queue.put(url);
                urlCount.getAndIncrement();
            }
        } catch (InterruptedException e) {
            log.error(e.getMessage());
            throw new QueueException("??");
        }
    }

    /**
     * ?URLUrl+1Url
     * @param url
     * @param timeout (MILLISECONDS)
     * @return
     * @throws QueueException
     */
    public boolean addUrl(WebURL url, int timeout) throws QueueException {
        if (url != null) {
            try {
                boolean b = Queue.offer(url, timeout, TimeUnit.MILLISECONDS);
                if (b) {
                    urlCount.getAndIncrement();
                }
                return b;
            } catch (InterruptedException e) {
                throw new QueueException("???");
            }
        }
        return false;
    }

    /**
     * @return
     * @desc ??URL
     */
    public WebURL getUrl() throws QueueException {
        try {
            return Queue.take();
        } catch (InterruptedException e) {
            log.error(e.getMessage());
            throw new QueueException("???");
        }
    }

    public boolean isEmpty() {
        return Queue.isEmpty();
    }

    /**
     * @param c
     * @return
     * @desc ??+c
     */
    public long processedSuccess(long c) {
        return success.addAndGet(c);
    }

    /**
     * @return
     * @desc ??+1
     */
    public long processedSuccess() {
        return success.incrementAndGet();
    }

    /**
     * @param c
     * @return
     * @desc ?+c
     */
    public int processedFailure(int c) {
        return failure.addAndGet(c);
    }

    /**
     * @return
     * @desc ?+1
     */
    public int processedFailure() {
        return failure.incrementAndGet();
    }

    /**
     * @return
     * @desc 
     */
    public long urlCount() {
        return urlCount.get();
    }

    /**
     * @return
     * @desc ??
     */
    public long success() {
        return success.get();
    }

    /**
     * @return
     * @desc ?
     */
    public int failure() {
        return failure.get();
    }

    /**
     * @param c
     * @return
     * @desc +c
     */
    public long processedIgnored(long c) {
        return ignored.addAndGet(c);
    }

    /**
     * @return
     * @desc +1
     */
    public long processedIgnored() {
        return ignored.incrementAndGet();
    }

    /**
     * @return
     * @desc 
     */
    public long ignored() {
        return ignored.get();
    }

    public String pendingStatus() {
        StringBuilder sb = new StringBuilder(32);
        sb.append("?URL").append(Queue.size()).append("")
                .append("?").append(urlCount).append("??")
                .append(success.get()).append("").append(failure.get()).append("")
                .append(ignored()).append("");
        return sb.toString();
    }
}