1 /*
   2  * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.xml.internal.messaging.saaj.util;
  27 
  28 
  29 import org.xml.sax.SAXException;
  30 import java.util.concurrent.ArrayBlockingQueue;
  31 import java.util.concurrent.BlockingQueue;
  32 import javax.xml.parsers.ParserConfigurationException;
  33 import javax.xml.parsers.SAXParser;
  34 import javax.xml.parsers.SAXParserFactory;
  35 import org.xml.sax.SAXNotRecognizedException;
  36 import org.xml.sax.SAXNotSupportedException;
  37 
  38 
  39 /**
  40  * Pool of SAXParser objects
  41  */
  42 public class ParserPool {
  43     private final BlockingQueue<SAXParser> queue;
  44     private SAXParserFactory factory;
  45 
  46     public ParserPool(int capacity) {
  47         queue = new ArrayBlockingQueue<SAXParser>(capacity);
  48         factory = SAXParserFactory.newInstance("com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl", SAAJUtil.getSystemClassLoader());
  49         factory.setNamespaceAware(true);
  50         for (int i = 0; i < capacity; i++) {
  51            try {
  52                 queue.put(factory.newSAXParser());
  53             } catch (InterruptedException ex) {
  54                 Thread.currentThread().interrupt();
  55                 throw new RuntimeException(ex);
  56             } catch (ParserConfigurationException ex) {
  57                 throw new RuntimeException(ex);
  58             } catch (SAXException ex) {
  59                 throw new RuntimeException(ex);
  60             }
  61         }
  62     }
  63 
  64     public SAXParser get() throws ParserConfigurationException,
  65                 SAXException {
  66 
  67         try {
  68             return (SAXParser) queue.take();
  69         } catch (InterruptedException ex) {
  70             throw new SAXException(ex);
  71         }
  72 
  73     }
  74 
  75     public boolean put(SAXParser parser) {
  76         return queue.offer(parser);
  77     }
  78 
  79     public void returnParser(SAXParser saxParser) {
  80         saxParser.reset();
  81         put(saxParser);
  82     }
  83 
  84 }