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Transaction-level Policies. Modify AuditableAspect and ContentHits example to make use of transaction policies so they only trigger once.

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git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2651 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
David Caruana
2006-04-12 16:15:20 +00:00
parent 776314da72
commit 0330f2cdb7
14 changed files with 1102 additions and 71 deletions
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64
source/java/org/alfresco/repo/policy/PolicyFactory.java
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@@ -25,6 +25,8 @@ import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.alfresco.repo.policy.Behaviour.NotificationFrequency;
/**
* A Policy Factory is responsible for creating Policy implementations.
@@ -41,6 +43,12 @@ import java.util.List;
// The policy interface class
private Class<P> policyClass;
// NOOP Invocation Handler
private static InvocationHandler NOOPHandler = new NOOPHandler();
// Transaction Invocation Handler Factory
private static TransactionInvocationHandlerFactory transactionHandlerFactory = null;
/**
@@ -55,6 +63,17 @@ import java.util.List;
this.index = index;
}
/**
* Sets the Transaction Invocation Handler
*
* @param handlerFactory
*/
protected static void setTransactionInvocationHandlerFactory(TransactionInvocationHandlerFactory factory)
{
transactionHandlerFactory = factory;
}
/**
* Gets the Policy class created by this factory
@@ -95,6 +114,16 @@ import java.util.List;
{
Behaviour behaviour = behaviourDef.getBehaviour();
P policyIF = behaviour.getInterface(policyClass);
if (!(behaviour.getNotificationFrequency().equals(NotificationFrequency.EVERY_EVENT)))
{
// wrap behaviour in transaction proxy which deals with delaying invocation until necessary
if (transactionHandlerFactory == null)
{
throw new PolicyException("Transaction-level policies not supported as transaction support for the Policy Component has not been initialised.");
}
InvocationHandler trxHandler = transactionHandlerFactory.createHandler(behaviour, behaviourDef.getPolicyDefinition(), policyIF);
policyIF = (P)Proxy.newProxyInstance(policyClass.getClassLoader(), new Class[]{policyClass}, trxHandler);
}
policyInterfaces.add(policyIF);
}
@@ -119,7 +148,7 @@ import java.util.List;
else if (policyList.size() == 0)
{
return (P)Proxy.newProxyInstance(policyClass.getClassLoader(),
new Class[]{policyClass}, new NOOPHandler());
new Class[]{policyClass}, NOOPHandler);
}
else
{
@@ -157,7 +186,7 @@ import java.util.List;
return null;
}
}
/**
* Multi-policy Invocation Handler.
@@ -166,8 +195,7 @@ import java.util.List;
*
* @param <P> policy interface
*/
@SuppressWarnings("hiding")
private static class MultiHandler<P> implements InvocationHandler, PolicyList
private static class MultiHandler<P extends Policy> implements InvocationHandler, PolicyList
{
private Collection<P> policyInterfaces;
@@ -186,13 +214,13 @@ import java.util.List;
*/
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
{
// Handle PolicyList level methods
if (method.getDeclaringClass().equals(PolicyList.class))
{
return method.invoke(this, args);
}
// Handle Object level methods
// Handle PolicyList level methods
if (method.getDeclaringClass().equals(PolicyList.class))
{
return method.invoke(this, args);
}
// Handle Object level methods
if (method.getName().equals("toString"))
{
return toString() + ": wrapped " + policyInterfaces.size() + " policies";
@@ -222,13 +250,13 @@ import java.util.List;
}
}
/* (non-Javadoc)
* @see org.alfresco.repo.policy.PolicyList#getPolicies()
*/
public Collection getPolicies()
{
return policyInterfaces;
}
/* (non-Javadoc)
* @see org.alfresco.repo.policy.PolicyList#getPolicies()
*/
public Collection getPolicies()
{
return policyInterfaces;
}
}
}