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      1 /*
      2  * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/conn/params/ConnPerRouteBean.java $
      3  * $Revision: 652947 $
      4  * $Date: 2008-05-02 16:15:40 -0700 (Fri, 02 May 2008) $
      5  *
      6  * ====================================================================
      7  *
      8  *  Licensed to the Apache Software Foundation (ASF) under one or more
      9  *  contributor license agreements.  See the NOTICE file distributed with
     10  *  this work for additional information regarding copyright ownership.
     11  *  The ASF licenses this file to You under the Apache License, Version 2.0
     12  *  (the "License"); you may not use this file except in compliance with
     13  *  the License.  You may obtain a copy of the License at
     14  *
     15  *      http://www.apache.org/licenses/LICENSE-2.0
     16  *
     17  *  Unless required by applicable law or agreed to in writing, software
     18  *  distributed under the License is distributed on an "AS IS" BASIS,
     19  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     20  *  See the License for the specific language governing permissions and
     21  *  limitations under the License.
     22  * ====================================================================
     23  *
     24  * This software consists of voluntary contributions made by many
     25  * individuals on behalf of the Apache Software Foundation.  For more
     26  * information on the Apache Software Foundation, please see
     27  * <http://www.apache.org/>.
     28  *
     29  */
     30 
     31 package org.apache.http.conn.params;
     32 
     33 import java.util.HashMap;
     34 import java.util.Map;
     35 
     36 import org.apache.http.conn.routing.HttpRoute;
     37 
     38 /**
     39  * This class maintains a map of HTTP routes to maximum number of connections allowed
     40  * for those routes. This class can be used by pooling
     41  * {@link org.apache.http.conn.ClientConnectionManager connection managers} for
     42  * a fine-grained control of connections on a per route basis.
     43  *
     44  * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
     45  *
     46  * @version $Revision: 652947 $
     47  *
     48  * @since 4.0
     49  */
     50 public final class ConnPerRouteBean implements ConnPerRoute {
     51 
     52     /** The default maximum number of connections allowed per host */
     53     public static final int DEFAULT_MAX_CONNECTIONS_PER_ROUTE = 2;   // Per RFC 2616 sec 8.1.4
     54 
     55     private final Map<HttpRoute, Integer> maxPerHostMap;
     56 
     57     private int defaultMax;
     58 
     59     public ConnPerRouteBean(int defaultMax) {
     60         super();
     61         this.maxPerHostMap = new HashMap<HttpRoute, Integer>();
     62         setDefaultMaxPerRoute(defaultMax);
     63     }
     64 
     65     public ConnPerRouteBean() {
     66         this(DEFAULT_MAX_CONNECTIONS_PER_ROUTE);
     67     }
     68 
     69     public int getDefaultMax() {
     70         return this.defaultMax;
     71     }
     72 
     73     public void setDefaultMaxPerRoute(int max) {
     74         if (max < 1) {
     75             throw new IllegalArgumentException
     76                 ("The maximum must be greater than 0.");
     77         }
     78         this.defaultMax = max;
     79     }
     80 
     81     public void setMaxForRoute(final HttpRoute route, int max) {
     82         if (route == null) {
     83             throw new IllegalArgumentException
     84                 ("HTTP route may not be null.");
     85         }
     86         if (max < 1) {
     87             throw new IllegalArgumentException
     88                 ("The maximum must be greater than 0.");
     89         }
     90         this.maxPerHostMap.put(route, Integer.valueOf(max));
     91     }
     92 
     93     public int getMaxForRoute(final HttpRoute route) {
     94         if (route == null) {
     95             throw new IllegalArgumentException
     96                 ("HTTP route may not be null.");
     97         }
     98         Integer max = this.maxPerHostMap.get(route);
     99         if (max != null) {
    100             return max.intValue();
    101         } else {
    102             return this.defaultMax;
    103         }
    104     }
    105 
    106     public void setMaxForRoutes(final Map<HttpRoute, Integer> map) {
    107         if (map == null) {
    108             return;
    109         }
    110         this.maxPerHostMap.clear();
    111         this.maxPerHostMap.putAll(map);
    112     }
    113 
    114 }
    115