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         try {
  50             factory.setFeature("jdk.xml.resetSymbolTable", true);
  51         } catch(SAXException | ParserConfigurationException e) {
  52         }
  53         factory.setNamespaceAware(true);
  54         for (int i = 0; i < capacity; i++) {
  55            try {
  56                 queue.put(factory.newSAXParser());
  57             } catch (InterruptedException ex) {
  58                 Thread.currentThread().interrupt();
  59                 throw new RuntimeException(ex);
  60             } catch (ParserConfigurationException ex) {
  61                 throw new RuntimeException(ex);
  62             } catch (SAXException ex) {
  63                 throw new RuntimeException(ex);
  64             }
  65         }
  66     }
  67 
  68     public SAXParser get() throws ParserConfigurationException,
  69                 SAXException {
  70 
  71         try {
  72             return (SAXParser) queue.take();
  73         } catch (InterruptedException ex) {
  74             throw new SAXException(ex);
  75         }
  76 
  77     }
  78 
  79     public boolean put(SAXParser parser) {
  80         return queue.offer(parser);
  81     }
  82 
  83     public void returnParser(SAXParser saxParser) {
  84         saxParser.reset();
  85         put(saxParser);
  86     }
  87 
  88 }