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1 /* 2 * The Apache Software License, Version 1.1 3 * 4 * Copyright (c) 1999 The Apache Software Foundation. All rights 5 * reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 19 * 3. The end-user documentation included with the redistribution, if 20 * any, must include the following acknowlegement: 21 * "This product includes software developed by the 22 * Apache Software Foundation (http://www.apache.org/)." 23 * Alternately, this acknowlegement may appear in the software itself, 24 * if and wherever such third-party acknowlegements normally appear. 25 * 26 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software 27 * Foundation" must not be used to endorse or promote products derived 28 * from this software without prior written permission. For written 29 * permission, please contact apache@apache.org. 30 * 31 * 5. Products derived from this software may not be called "Apache" 32 * nor may "Apache" appear in their names without prior written 33 * permission of the Apache Group. 34 * 35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 46 * SUCH DAMAGE. 47 * ==================================================================== 48 * 49 * This software consists of voluntary contributions made by many 50 * individuals on behalf of the Apache Software Foundation. For more 51 * information on the Apache Software Foundation, please see 52 * <http://www.apache.org/>;. 53 * 54 */ 55 package org.apache.commons.jelly.tags.ojb; 56 57 import ojb.broker.PersistenceBroker; 58 import ojb.broker.PersistenceBrokerException; 59 import ojb.broker.PersistenceBrokerFactory; 60 61 import org.apache.commons.jelly.JellyContext; 62 import org.apache.commons.jelly.JellyException; 63 import org.apache.commons.jelly.TagSupport; 64 import org.apache.commons.jelly.XMLOutput; 65 66 /*** 67 * <p>Tag handler for <Driver> in JSTL, used to create 68 * a simple DataSource for prototyping.</p> 69 * 70 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 71 * @version $Revision: 1.4 $ 72 */ 73 public class BrokerTag extends TagSupport { 74 75 /*** The variable name to export. */ 76 private String var; 77 78 /*** The persistence broker instance */ 79 private PersistenceBroker broker; 80 81 public BrokerTag() { 82 } 83 84 85 // Tag interface 86 //------------------------------------------------------------------------- 87 public void doTag(XMLOutput output) throws Exception { 88 if ( var == null ) { 89 var = "org.apache.commons.jelly.ojb.Broker"; 90 } 91 if ( broker != null ) { 92 context.setVariable(var, broker); 93 invokeBody(output); 94 } 95 else { 96 broker = PersistenceBrokerFactory.createPersistenceBroker(); 97 context.setVariable(var, broker); 98 99 try { 100 invokeBody(output); 101 } 102 finally { 103 broker.clearCache(); 104 PersistenceBrokerFactory.releaseInstance(broker); 105 broker = null; 106 context.removeVariable(var); 107 } 108 } 109 } 110 111 // Properties 112 //------------------------------------------------------------------------- 113 /*** Sets the variable name to define for this expression 114 */ 115 public void setVar(String var) { 116 this.var = var; 117 } 118 119 /*** @return the persistence broker instance */ 120 public PersistenceBroker getBroker() { 121 return broker; 122 } 123 124 /*** Sets the persistence broker instance */ 125 public void setBroker(PersistenceBroker broker) { 126 this.broker = broker; 127 } 128 }

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