Spring Framework

org.springframework.transaction.interceptor
Class AbstractFallbackTransactionAttributeSource

java.lang.Object
  extended by org.springframework.transaction.interceptor.AbstractFallbackTransactionAttributeSource
All Implemented Interfaces:
TransactionAttributeSource
Direct Known Subclasses:
AnnotationTransactionAttributeSource

public abstract class AbstractFallbackTransactionAttributeSource
extends java.lang.Object
implements TransactionAttributeSource

Abstract implementation of TransactionAttributeSource that caches attributes for methods and implements a fallback policy: 1. specific target method; 2. target class; 3. declaring method; 4. declaring class/interface.

Defaults to using the target class's transaction attribute if none is associated with the target method. Any transaction attribute associated with the target method completely overrides a class transaction attribute. If none found on the target class, the interface that the invoked method has been called through (in case of a JDK proxy) will be checked.

This implementation caches attributes by method after they are first used. If it is ever desirable to allow dynamic changing of transaction attributes (which is very unlikely), caching could be made configurable. Caching is desirable because of the cost of evaluating rollback rules.

Since:
1.1
Author:
Rod Johnson, Juergen Hoeller

Field Summary
protected  org.apache.commons.logging.Log logger
          Logger available to subclasses.
 
Constructor Summary
AbstractFallbackTransactionAttributeSource()
           
 
Method Summary
protected  boolean allowPublicMethodsOnly()
          Should only public methods be allowed to have transactional semantics?
protected abstract  TransactionAttribute findTransactionAttribute(java.lang.Class<?> clazz)
          Subclasses need to implement this to return the transaction attribute for the given class, if any.
protected abstract  TransactionAttribute findTransactionAttribute(java.lang.reflect.Method method)
          Subclasses need to implement this to return the transaction attribute for the given method, if any.
protected  java.lang.Object getCacheKey(java.lang.reflect.Method method, java.lang.Class<?> targetClass)
          Determine a cache key for the given method and target class.
 TransactionAttribute getTransactionAttribute(java.lang.reflect.Method method, java.lang.Class<?> targetClass)
          Determine the transaction attribute for this method invocation.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

logger

protected final org.apache.commons.logging.Log logger
Logger available to subclasses.

As this base class is not marked Serializable, the logger will be recreated after serialization - provided that the concrete subclass is Serializable.

Constructor Detail

AbstractFallbackTransactionAttributeSource

public AbstractFallbackTransactionAttributeSource()
Method Detail

getTransactionAttribute

public TransactionAttribute getTransactionAttribute(java.lang.reflect.Method method,
                                                    java.lang.Class<?> targetClass)
Determine the transaction attribute for this method invocation.

Defaults to the class's transaction attribute if no method attribute is found.

Specified by:
getTransactionAttribute in interface TransactionAttributeSource
Parameters:
method - the method for the current invocation (never null)
targetClass - the target class for this invocation (may be null)
Returns:
TransactionAttribute for this method, or null if the method is not transactional

getCacheKey

protected java.lang.Object getCacheKey(java.lang.reflect.Method method,
                                       java.lang.Class<?> targetClass)
Determine a cache key for the given method and target class.

Must not produce same key for overloaded methods. Must produce same key for different instances of the same method.

Parameters:
method - the method (never null)
targetClass - the target class (may be null)
Returns:
the cache key (never null)

findTransactionAttribute

protected abstract TransactionAttribute findTransactionAttribute(java.lang.reflect.Method method)
Subclasses need to implement this to return the transaction attribute for the given method, if any.

Parameters:
method - the method to retrieve the attribute for
Returns:
all transaction attribute associated with this method (or null if none)

findTransactionAttribute

protected abstract TransactionAttribute findTransactionAttribute(java.lang.Class<?> clazz)
Subclasses need to implement this to return the transaction attribute for the given class, if any.

Parameters:
clazz - the class to retrieve the attribute for
Returns:
all transaction attribute associated with this class (or null if none)

allowPublicMethodsOnly

protected boolean allowPublicMethodsOnly()
Should only public methods be allowed to have transactional semantics?

The default implementation returns false.


Spring Framework