Examples of org.apache.isis.applib.NonRecoverableException

org.apache.isis.applib.NonRecoverableException
Indicates that an unexpected, non-recoverable (fatal) exception has occurred within the application logic.
Throwing this exception will (dependent on the viewer) result in some sort of an error page being displayed to the user.
Note that this exception has identical semantics to {@link FatalException} (of which it is the immediatesuperclass) and can be considered a synonym. @see RecoverableException @see ApplicationException @see FatalException

                if (!runtimeContext.getTransactionState().canCommit()) {
                    // something severe has happened to the underlying transaction;
                    // so escalate this exception to be non-recoverable
                    final Throwable targetExceptionCause = targetException.getCause();
                    Throwable nonRecoverableCause = targetExceptionCause != null? targetExceptionCause: targetException;
                    throw new NonRecoverableException(nonRecoverableCause);
                }
            }


            ThrowableExtensions.throwWithinIsisException(e, "Exception executing " + method);

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                if (!runtimeContext.getTransactionState().canCommit()) {
                    // something severe has happened to the underlying transaction;
                    // so escalate this exception to be non-recoverable
                    final Throwable targetExceptionCause = targetException.getCause();
                    Throwable nonRecoverableCause = targetExceptionCause != null? targetExceptionCause: targetException;
                    throw new NonRecoverableException(nonRecoverableCause);
                }
            }


            ThrowableExtensions.throwWithinIsisException(e, "Exception executing " + method);
            return null;

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                if (!runtimeContext.getTransactionState().canCommit()) {
                    // something severe has happened to the underlying transaction;
                    // so escalate this exception to be non-recoverable
                    final Throwable targetExceptionCause = targetException.getCause();
                    Throwable nonRecoverableCause = targetExceptionCause != null? targetExceptionCause: targetException;
                    throw new NonRecoverableException(nonRecoverableCause);
                }
            }


            ThrowableExtensions.throwWithinIsisException(e, "Exception executing " + method);

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                final byte[] utf8Bytes = IoUtils.readBytes(zis);
                return new String(utf8Bytes, Charset.forName("UTF-8"));
            }
            return null;
        } catch(IOException ex) {
            throw new NonRecoverableException(ex);
        } finally {
            IoUtils.closeSafely(zis);
        }
    }

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    @Prototype
    @ActionSemantics(Of.SAFE)
    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

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    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) {
            throw new RuntimeException("Throwing some other exception");
        }
    }

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    @Prototype
    @ActionSemantics(Of.SAFE)
    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

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    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) {
            throw new RuntimeException("Throwing some other exception");
        }
    }

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    @Prototype
    @ActionSemantics(Of.SAFE)
    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 subcategory cannot be null), causing the xactn to be aborted

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    @Prototype
    @ActionSemantics(Of.SAFE)
    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

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