Spring/spring-webflow
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Added new exposeException() hook method to TransitionExecutingStateExceptionHandler.

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This commit is contained in:
Erwin Vervaet
2007-04-05 09:07:33 +00:00
parent 2fbc0869f8
commit 8088880867
2 changed files with 24 additions and 10 deletions
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1
spring-webflow/changelog.txt
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@@ -46,6 +46,7 @@ Package org.springframework.webflow.engine
* Added BeanFactoryFlowVariable(String, BeanFactory, ScopeType) convenience constructor to the
BeanFactoryFlowVariable.
* Added settableExpression() method to AbstractFlowBuilder.
* Added new exposeException() hook method to TransitionExecutingStateExceptionHandler.
Package org.springframework.webflow.execution
* Added FlowExecutionListener.sessionCreated(RequestContext, FlowSession) callback, useful for

33
spring-webflow/src/main/java/org/springframework/webflow/engine/support/TransitionExecutingStateExceptionHandler.java
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@@ -30,6 +30,7 @@ import org.springframework.webflow.engine.RequestControlContext;
import org.springframework.webflow.engine.TargetStateResolver;
import org.springframework.webflow.engine.Transition;
import org.springframework.webflow.execution.FlowExecutionException;
import org.springframework.webflow.execution.RequestContext;
import org.springframework.webflow.execution.ViewSelection;
/**
@@ -43,6 +44,8 @@ import org.springframework.webflow.execution.ViewSelection;
* @author Keith Donald
*/
public class TransitionExecutingStateExceptionHandler implements FlowExecutionExceptionHandler {
// this class should really have been called TransitionExecutingFlowExceptionHandler
private static final Log logger = LogFactory.getLog(TransitionExecutingStateExceptionHandler.class);
@@ -108,25 +111,35 @@ public class TransitionExecutingStateExceptionHandler implements FlowExecutionEx
return getTargetStateResolver(e) != null;
}
public ViewSelection handle(FlowExecutionException e, RequestControlContext context) {
public ViewSelection handle(FlowExecutionException exception, RequestControlContext context) {
if (logger.isDebugEnabled()) {
logger.debug("Handling state exception " + e, e);
logger.debug("Handling state exception " + exception, exception);
}
// expose state exception in flash scope so it's available for response rendering
context.getFlashScope().put(STATE_EXCEPTION_ATTRIBUTE, e);
Throwable rootCause = findRootCause(e);
exposeException(context, exception, findRootCause(exception));
actionList.execute(context);
return context.execute(new Transition(getTargetStateResolver(exception)));
}
// helpers
/**
* Exposes the given flow exception and root cause in flash scope to make
* them available for response rendering. Subclasses can override this
* if they way to expose the exceptions in a different way or do special
* processing before the exceptions are exposed.
* @param context the request control context
* @param exception the exception being handled
* @param rootCause root cause of the exception being handled (could be null)
*/
protected void exposeException(RequestContext context, FlowExecutionException exception, Throwable rootCause) {
context.getFlashScope().put(STATE_EXCEPTION_ATTRIBUTE, exception);
if (logger.isDebugEnabled()) {
logger.debug("Exposing state exception root cause " + rootCause + " under attribute '"
+ ROOT_CAUSE_EXCEPTION_ATTRIBUTE + "'");
}
// expose root cause in flash scope so it's available for response rendering
context.getFlashScope().put(ROOT_CAUSE_EXCEPTION_ATTRIBUTE, rootCause);
actionList.execute(context);
return context.execute(new Transition(getTargetStateResolver(e)));
}
// helpers
/**
* Find the mapped target state resolver for given exception. Returns
* <code>null</code> if no mapping can be found for given exception. Will