DATACMNS-318 - Refined persistence exception translation infrastructure.

Extracted the activation of persistence exception translation into a separate RepositoryProxyPostProcessor. Adapted TransactionalRepositoryFactoryBeanSupport to also register the newly introduced PersistenceExceptionTranslationRepositoryProxyPostProcessor.

src/main/java/org/springframework/data/repository/core/support/PersistenceExceptionTranslationRepositoryProxyPostProcessor.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.repository.core.support;
+
+import org.springframework.aop.framework.ProxyFactory;
+import org.springframework.beans.factory.ListableBeanFactory;
+import org.springframework.dao.support.PersistenceExceptionTranslationInterceptor;
+import org.springframework.util.Assert;
+
+/**
+ * {@link RepositoryProxyPostProcessor} to register a {@link PersistenceExceptionTranslationInterceptor} on the
+ * repository proxy.
+ * 
+ * @author Oliver Gierke
+ */
+public class PersistenceExceptionTranslationRepositoryProxyPostProcessor implements RepositoryProxyPostProcessor {
+
+	private final PersistenceExceptionTranslationInterceptor interceptor;
+
+	/**
+	 * Creates a new {@link PersistenceExceptionTranslationRepositoryProxyPostProcessor} using the given
+	 * {@link ListableBeanFactory}.
+	 * 
+	 * @param beanFactory must not be {@literal null}.
+	 */
+	public PersistenceExceptionTranslationRepositoryProxyPostProcessor(ListableBeanFactory beanFactory) {
+
+		Assert.notNull(beanFactory, "BeanFactory must not be null!");
+
+		this.interceptor = new PersistenceExceptionTranslationInterceptor();
+		this.interceptor.setBeanFactory(beanFactory);
+		this.interceptor.afterPropertiesSet();
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.repository.core.support.RepositoryProxyPostProcessor#postProcess(org.springframework.aop.framework.ProxyFactory)
+	 */
+	public void postProcess(ProxyFactory factory) {
+		factory.addAdvice(interceptor);
+	}
+}

src/main/java/org/springframework/data/repository/core/support/TransactionalRepositoryFactoryBeanSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2008-2010 the original author or authors.
+ * Copyright 2008-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,6 +37,7 @@ public abstract class TransactionalRepositoryFactoryBeanSupport<T extends Reposi
 
 	private String transactionManagerName = TxUtils.DEFAULT_TRANSACTION_MANAGER;
 	private RepositoryProxyPostProcessor txPostProcessor;
+	private RepositoryProxyPostProcessor exceptionPostProcessor;
 
 	/**
 	 * Setter to configure which transaction manager to be used. We have to use the bean name explicitly as otherwise the
@@ -46,7 +47,6 @@ public abstract class TransactionalRepositoryFactoryBeanSupport<T extends Reposi
 	 * @param transactionManager
 	 */
 	public void setTransactionManager(String transactionManager) {
-
 		this.transactionManagerName = transactionManager == null ? TxUtils.DEFAULT_TRANSACTION_MANAGER : transactionManager;
 	}
 
@@ -60,6 +60,7 @@ public abstract class TransactionalRepositoryFactoryBeanSupport<T extends Reposi
 	protected final RepositoryFactorySupport createRepositoryFactory() {
 
 		RepositoryFactorySupport factory = doCreateRepositoryFactory();
+		factory.addRepositoryProxyPostProcessor(exceptionPostProcessor);
 		factory.addRepositoryProxyPostProcessor(txPostProcessor);
 		return factory;
 	}
@@ -72,17 +73,15 @@ public abstract class TransactionalRepositoryFactoryBeanSupport<T extends Reposi
 	protected abstract RepositoryFactorySupport doCreateRepositoryFactory();
 
 	/*
-			 * (non-Javadoc)
-			 *
-			 * @see
-			 * org.springframework.beans.factory.BeanFactoryAware#setBeanFactory(org
-			 * .springframework.beans.factory.BeanFactory)
-			 */
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.BeanFactoryAware#setBeanFactory(org.springframework.beans.factory.BeanFactory)
+	 */
 	public void setBeanFactory(BeanFactory beanFactory) {
 
 		Assert.isInstanceOf(ListableBeanFactory.class, beanFactory);
 
-		this.txPostProcessor = new TransactionalRepositoryProxyPostProcessor((ListableBeanFactory) beanFactory,
-				transactionManagerName);
+		ListableBeanFactory listableBeanFactory = (ListableBeanFactory) beanFactory;
+		this.txPostProcessor = new TransactionalRepositoryProxyPostProcessor(listableBeanFactory, transactionManagerName);
+		this.exceptionPostProcessor = new PersistenceExceptionTranslationRepositoryProxyPostProcessor(listableBeanFactory);
 	}
 }

src/main/java/org/springframework/data/repository/core/support/TransactionalRepositoryProxyPostProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2008-2010 the original author or authors.
+ * Copyright 2008-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -53,20 +53,19 @@ import org.springframework.util.ObjectUtils;
 class TransactionalRepositoryProxyPostProcessor implements RepositoryProxyPostProcessor {
 
 	private final TransactionInterceptor transactionInterceptor;
-	private final PersistenceExceptionTranslationInterceptor petInterceptor;
 
 	/**
-	 * Creates a new {@link TransactionalRepositoryProxyPostProcessor}.
+	 * Creates a new {@link TransactionalRepositoryProxyPostProcessor} using the given {@link ListableBeanFactory} and
+	 * transaction manager bean name.
+	 * 
+	 * @param beanFactory must not be {@literal null}.
+	 * @param transactionManagerName must not be {@literal null} or empty.
 	 */
 	public TransactionalRepositoryProxyPostProcessor(ListableBeanFactory beanFactory, String transactionManagerName) {
 
 		Assert.notNull(beanFactory);
 		Assert.notNull(transactionManagerName);
 
-		this.petInterceptor = new PersistenceExceptionTranslationInterceptor();
-		this.petInterceptor.setBeanFactory(beanFactory);
-		this.petInterceptor.afterPropertiesSet();
-
 		this.transactionInterceptor = new TransactionInterceptor(null, new CustomAnnotationTransactionAttributeSource());
 		this.transactionInterceptor.setTransactionManagerBeanName(transactionManagerName);
 		this.transactionInterceptor.setBeanFactory(beanFactory);
@@ -74,15 +73,10 @@ class TransactionalRepositoryProxyPostProcessor implements RepositoryProxyPostPr
 	}
 
 	/*
-			 * (non-Javadoc)
-			 *
-			 * @see
-			 * org.springframework.data.repository.support.RepositoryProxyPostProcessor
-			 * #postProcess(org.springframework.aop.framework.ProxyFactory)
-			 */
+	 * (non-Javadoc)
+	 * @see org.springframework.data.repository.core.support.RepositoryProxyPostProcessor#postProcess(org.springframework.aop.framework.ProxyFactory)
+	 */
 	public void postProcess(ProxyFactory factory) {
-
-		factory.addAdvice(petInterceptor);
 		factory.addAdvice(transactionInterceptor);
 	}