Examples of org.apache.isis.applib.RecoverableException

org.apache.isis.applib.RecoverableException
Indicates that an exceptional condition/problem has occurred within the application's domain logic.
Throwing this exception is equivalent to calling {@link DomainObjectContainer#raiseError(String)}. The framework will trap the error and display the exception message as a warning.
This exception should only be thrown for "recoverable" exceptions, that is, those which could be anticipated by the application. It should not be thrown for fatal, unanticipated exceptions.
The framework attempts to apply some heuristics; if the underlying Isis transaction has been aborted (for example as the result of a problem persisting some data) but then the application attempts to throw this exception, the exception will be promoted to a fatal exception.
Note that this exception has identical semantics to {@link ApplicationException} (of which it is the immediatesuperclass), and can be considered a synonym. @see ApplicationException @see NonRecoverableException @see FatalException

                    getMessageBroker().addWarning(ex.getMessage());
                    return;


                } catch(final RuntimeException ex) {
                    
                    final RecoverableException appEx = ActionModel.getApplicationExceptionIfAny(ex);
                    if (appEx != null) {


                        recover();
                        
                        getMessageBroker().setApplicationError(appEx.getMessage());
                        
                        // there's no need to abort the transaction, it will have already been done
                        // (in IsisTransactionManager#executeWithinTransaction(...)). 
                        return;
                    }

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                    getMessageBroker().addWarning(ex.getMessage());
                    return;


                } catch(final RuntimeException ex) {
                    
                    final RecoverableException appEx = ActionModel.getApplicationExceptionIfAny(ex);
                    if (appEx != null) {


                        recover();
                        
                        getMessageBroker().setApplicationError(appEx.getMessage());
                        
                        // there's no need to abort the transaction, it will have already been done
                        // (in IsisTransactionManager#executeWithinTransaction(...)). 
                        return;
                    }

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            // TODO: some duplication between this code and ActionPanel


            // see if is an application-defined exception
            // if so, is converted to an application error,
            // equivalent to calling DomainObjectContainer#raiseError(...)
            final RecoverableException appEx = ActionModel.getApplicationExceptionIfAny(ex);
            if (appEx != null) {
                IsisContext.getMessageBroker().setApplicationError(appEx.getMessage());
                return null;
            } 


            // not handled, so propagate
            throw ex;

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            // TODO: some duplication between this code and ActionLinkFactoryAbstract
            
            // see if is an application-defined exception
            // if so, is converted to an application error,
            // equivalent to calling DomainObjectContainer#raiseError(...)
            final RecoverableException appEx = ActionModel.getApplicationExceptionIfAny(ex);
            if (appEx != null) {
                getMessageBroker().setApplicationError(appEx.getMessage());


                // there's no need to abort the transaction, it will have already been done
                // (in IsisTransactionManager#executeWithinTransaction(...)). 
                return null;
            }

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    public void demoException(final @Named("Type") DemoExceptionType type) {
        switch(type) {
        case NonRecoverableException:
            throw new NonRecoverableException("Demo throwing " + type.name());
        case RecoverableException:
            throw new RecoverableException("Demo throwing " + type.name());
        case RecoverableExceptionAutoEscalated:
            try {
                // this will trigger an exception (because category cannot be null), causing the xactn to be aborted
                setCategory(null);
                container.flush();
            } catch(Exception e) {
                // it's a programming mistake to throw only a recoverable exception here, because of the xactn's state.
                // the framework should instead auto-escalate this to a non-recoverable exception
                throw new RecoverableException("Demo throwing " + type.name(), e);
            }
        }
    }

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    public Behaviour getSubscriberBehaviour() {
        return behaviour;
    }
    private void onExecutedVetoIfRequired() {
        if(behaviour == Behaviour.AnyExecuteVetoWithRecoverableException) {
            throw new RecoverableException("Rejecting event (recoverable exception thrown)");
        }
        if(behaviour == Behaviour.AnyExecuteVetoWithNonRecoverableException) {
            throw new NonRecoverableException("Rejecting event (recoverable exception thrown)");
        }
        if(behaviour == Behaviour.AnyExecuteVetoWithOtherException) {

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                onExecutedVetoIfRequired();


                if(ev.getIdentifier().getMemberName().contains("description")) {
                    String newValue = (String) ev.getNewValue();
                    if(newValue.matches(".*demo veto.*")) {
                        throw new RecoverableException("oh no you don't! " + ev.getNewValue());
                    }
                }
                break;
        }
    }

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