Source Code Cross Referenced for MethodMapTransactionAttributeSource.java in  » J2EE » spring-framework-2.0.6 » org » springframework » transaction » interceptor » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » J2EE » spring framework 2.0.6 » org.springframework.transaction.interceptor 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 2002-2006 the original author or authors.
003:         *
004:         * Licensed under the Apache License, Version 2.0 (the "License");
005:         * you may not use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *      http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.
015:         */
016:
017:        package org.springframework.transaction.interceptor;
018:
019:        import java.lang.reflect.Method;
020:        import java.util.ArrayList;
021:        import java.util.HashMap;
022:        import java.util.Iterator;
023:        import java.util.List;
024:        import java.util.Map;
025:
026:        import org.apache.commons.logging.Log;
027:        import org.apache.commons.logging.LogFactory;
028:
029:        import org.springframework.beans.factory.BeanClassLoaderAware;
030:        import org.springframework.beans.factory.InitializingBean;
031:        import org.springframework.util.Assert;
032:        import org.springframework.util.ClassUtils;
033:        import org.springframework.util.ObjectUtils;
034:        import org.springframework.util.PatternMatchUtils;
035:
036:        /**
037:         * Simple {@link TransactionAttributeSource} implementation that
038:         * allows attributes to be stored per method in a {@link Map}.
039:         * 
040:         * @author Rod Johnson
041:         * @author Juergen Hoeller
042:         * @since 24.04.2003
043:         * @see #isMatch
044:         * @see NameMatchTransactionAttributeSource
045:         */
046:        public class MethodMapTransactionAttributeSource implements 
047:                TransactionAttributeSource, BeanClassLoaderAware,
048:                InitializingBean {
049:
050:            /** Logger available to subclasses */
051:            protected final Log logger = LogFactory.getLog(getClass());
052:
053:            /** Map from method name to attribute value */
054:            private Map methodMap;
055:
056:            private ClassLoader beanClassLoader = ClassUtils
057:                    .getDefaultClassLoader();
058:
059:            private boolean eagerlyInitialized = false;
060:
061:            private boolean initialized = false;
062:
063:            /** Map from Method to TransactionAttribute */
064:            private final Map transactionAttributeMap = new HashMap();
065:
066:            /** Map from Method to name pattern used for registration */
067:            private final Map methodNameMap = new HashMap();
068:
069:            /**
070:             * Set a name/attribute map, consisting of "FQCN.method" method names
071:             * (e.g. "com.mycompany.mycode.MyClass.myMethod") and
072:             * {@link TransactionAttribute} instances (or Strings to be converted
073:             * to <code>TransactionAttribute</code> instances).
074:             * <p>Intended for configuration via setter injection, typically within
075:             * a Spring bean factory. Relies on {@link #afterPropertiesSet()}
076:             * being called afterwards.
077:             * @param methodMap said {@link Map} from method name to attribute value
078:             * @see TransactionAttribute
079:             * @see TransactionAttributeEditor
080:             */
081:            public void setMethodMap(Map methodMap) {
082:                this .methodMap = methodMap;
083:            }
084:
085:            public void setBeanClassLoader(ClassLoader beanClassLoader) {
086:                this .beanClassLoader = beanClassLoader;
087:            }
088:
089:            /**
090:             * Eagerly initializes the specified
091:             * {@link #setMethodMap(java.util.Map) "methodMap"}, if any.
092:             * @see #initMethodMap(java.util.Map)
093:             */
094:            public void afterPropertiesSet() {
095:                initMethodMap(this .methodMap);
096:                this .eagerlyInitialized = true;
097:                this .initialized = true;
098:            }
099:
100:            /**
101:             * Initialize the specified {@link #setMethodMap(java.util.Map) "methodMap"}, if any.
102:             * @param methodMap Map from method names to <code>TransactionAttribute</code> instances
103:             * (or Strings to be converted to <code>TransactionAttribute</code> instances)
104:             * @see #setMethodMap
105:             */
106:            protected void initMethodMap(Map methodMap) {
107:                if (methodMap != null) {
108:                    Iterator it = methodMap.entrySet().iterator();
109:                    while (it.hasNext()) {
110:                        Map.Entry entry = (Map.Entry) it.next();
111:                        Object key = entry.getKey();
112:                        if (!(key instanceof  String)) {
113:                            throw new IllegalArgumentException(
114:                                    "Invalid method map key [" + key
115:                                            + "]: only Strings allowed");
116:                        }
117:                        Object value = entry.getValue();
118:                        // Check whether we need to convert from String to TransactionAttribute.
119:                        TransactionAttribute attr = null;
120:                        if (value instanceof  TransactionAttribute) {
121:                            attr = (TransactionAttribute) value;
122:                        } else if (value instanceof  String) {
123:                            TransactionAttributeEditor editor = new TransactionAttributeEditor();
124:                            editor.setAsText((String) value);
125:                            attr = (TransactionAttribute) editor.getValue();
126:                        } else {
127:                            throw new IllegalArgumentException("Value ["
128:                                    + value + "] is neither of type ["
129:                                    + TransactionAttribute.class.getName()
130:                                    + "] nor a String");
131:                        }
132:                        addTransactionalMethod((String) key, attr);
133:                    }
134:                }
135:            }
136:
137:            /**
138:             * Add an attribute for a transactional method.
139:             * <p>Method names can end or start with "*" for matching multiple methods.
140:             * @param name class and method name, separated by a dot
141:             * @param attr attribute associated with the method
142:             * @throws IllegalArgumentException in case of an invalid name
143:             */
144:            public void addTransactionalMethod(String name,
145:                    TransactionAttribute attr) {
146:                Assert.notNull(name, "Name must not be null");
147:                int lastDotIndex = name.lastIndexOf(".");
148:                if (lastDotIndex == -1) {
149:                    throw new IllegalArgumentException(
150:                            "'"
151:                                    + name
152:                                    + "' is not a valid method name: format is FQN.methodName");
153:                }
154:                String className = name.substring(0, lastDotIndex);
155:                String methodName = name.substring(lastDotIndex + 1);
156:                Class clazz = ClassUtils.resolveClassName(className,
157:                        this .beanClassLoader);
158:                addTransactionalMethod(clazz, methodName, attr);
159:            }
160:
161:            /**
162:             * Add an attribute for a transactional method.
163:             * Method names can end or start with "*" for matching multiple methods.
164:             * @param clazz target interface or class
165:             * @param mappedName mapped method name
166:             * @param attr attribute associated with the method
167:             */
168:            public void addTransactionalMethod(Class clazz, String mappedName,
169:                    TransactionAttribute attr) {
170:                Assert.notNull(clazz, "Class must not be null");
171:                Assert.notNull(mappedName, "Mapped name must not be null");
172:                String name = clazz.getName() + '.' + mappedName;
173:
174:                // TODO address method overloading? At present this will
175:                // simply match all methods that have the given name.
176:                // Consider EJB syntax (int, String) etc.?
177:                Method[] methods = clazz.getDeclaredMethods();
178:                List matchingMethods = new ArrayList();
179:                for (int i = 0; i < methods.length; i++) {
180:                    if (isMatch(methods[i].getName(), mappedName)) {
181:                        matchingMethods.add(methods[i]);
182:                    }
183:                }
184:                if (matchingMethods.isEmpty()) {
185:                    throw new IllegalArgumentException("Couldn't find method '"
186:                            + mappedName + "' on class [" + clazz.getName()
187:                            + "]");
188:                }
189:
190:                // register all matching methods
191:                for (Iterator it = matchingMethods.iterator(); it.hasNext();) {
192:                    Method method = (Method) it.next();
193:                    String regMethodName = (String) this .methodNameMap
194:                            .get(method);
195:                    if (regMethodName == null
196:                            || (!regMethodName.equals(name) && regMethodName
197:                                    .length() <= name.length())) {
198:                        // No already registered method name, or more specific
199:                        // method name specification now -> (re-)register method.
200:                        if (logger.isDebugEnabled() && regMethodName != null) {
201:                            logger
202:                                    .debug("Replacing attribute for transactional method ["
203:                                            + method
204:                                            + "]: current name '"
205:                                            + name
206:                                            + "' is more specific than '"
207:                                            + regMethodName + "'");
208:                        }
209:                        this .methodNameMap.put(method, name);
210:                        addTransactionalMethod(method, attr);
211:                    } else {
212:                        if (logger.isDebugEnabled() && regMethodName != null) {
213:                            logger
214:                                    .debug("Keeping attribute for transactional method ["
215:                                            + method
216:                                            + "]: current name '"
217:                                            + name
218:                                            + "' is not more specific than '"
219:                                            + regMethodName + "'");
220:                        }
221:                    }
222:                }
223:            }
224:
225:            /**
226:             * Add an attribute for a transactional method.
227:             * @param method the method
228:             * @param attr attribute associated with the method
229:             */
230:            public void addTransactionalMethod(Method method,
231:                    TransactionAttribute attr) {
232:                Assert.notNull(method, "Method must not be null");
233:                Assert.notNull(attr, "TransactionAttribute must not be null");
234:                if (logger.isDebugEnabled()) {
235:                    logger.debug("Adding transactional method [" + method
236:                            + "] with attribute [" + attr + "]");
237:                }
238:                this .transactionAttributeMap.put(method, attr);
239:            }
240:
241:            /**
242:             * Return if the given method name matches the mapped name.
243:             * <p>The default implementation checks for "xxx*", "*xxx" and "*xxx*"
244:             * matches, as well as direct equality.
245:             * @param methodName the method name of the class
246:             * @param mappedName the name in the descriptor
247:             * @return if the names match
248:             * @see org.springframework.util.PatternMatchUtils#simpleMatch(String, String)
249:             */
250:            protected boolean isMatch(String methodName, String mappedName) {
251:                return PatternMatchUtils.simpleMatch(mappedName, methodName);
252:            }
253:
254:            public TransactionAttribute getTransactionAttribute(Method method,
255:                    Class targetClass) {
256:                if (this .eagerlyInitialized) {
257:                    return (TransactionAttribute) this .transactionAttributeMap
258:                            .get(method);
259:                } else {
260:                    synchronized (this .transactionAttributeMap) {
261:                        if (!this .initialized) {
262:                            initMethodMap(this .methodMap);
263:                            this .initialized = true;
264:                        }
265:                        return (TransactionAttribute) this .transactionAttributeMap
266:                                .get(method);
267:                    }
268:                }
269:            }
270:
271:            public boolean equals(Object other) {
272:                if (this  == other) {
273:                    return true;
274:                }
275:                if (!(other instanceof  MethodMapTransactionAttributeSource)) {
276:                    return false;
277:                }
278:                MethodMapTransactionAttributeSource otherTas = (MethodMapTransactionAttributeSource) other;
279:                return ObjectUtils.nullSafeEquals(this .methodMap,
280:                        otherTas.methodMap);
281:            }
282:
283:            public int hashCode() {
284:                return MethodMapTransactionAttributeSource.class.hashCode();
285:            }
286:
287:            public String toString() {
288:                return getClass().getName() + ": " + this.methodMap;
289:            }
290:
291:        }
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