Handling exceptions using html-bridge

Hello

We begin to create plugin views using the html bridge.  Everything worked well, until we started to work on the management of exceptions.

The dataservice, an error occurred when retrieving data - so a RuntimeException is thrown.   But in our htmlview - in the

. Fail (function (jyXHR, status, error) - the error value is always "not found".

I thought I was doing something wrong, so I tried the same thing in the global services-html plugin - but the results are the same.

Here, I just throw a RuntimeException false registration settings.

> throw new RuntimeException ("abcd");

It gets stuck in the Service controller - in the handleDataAccessException() - which returns

> return Collections.singletonMap ("message", ex.getMessage ());

Here we can see the message

'Error in parameter in null\globalview/Settings.properties record'

But in the settingsView.js, the .fail is called, and the error is also 'not found '.

Could you please tell me what is the problem here?

Thank you

Cathy

Found what was wrong with our example code.  It turns out that the "not found" error comes from Tomcat that signals a 404 for saveSettings.jsp in the case of the Global Services sample...

Exception handling code must be changed in ServicesController.java

Of this:

@ExceptionHandler (Exception.class)

@ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)

public map handleDataAccessException (Exception ex) {}

Return Collections.singletonMap ("message", ex.getMessage ());

}

To do this:

@ExceptionHandler (Exception.class)

@ResponseBody

public map handleDataAccessException (System.Exception ex, HttpServletResponse response) {}

response.setStatus (HttpStatus.INTERNAL_SERVER_ERROR.value ());

Map errorMap = new HashMap ();

errorMap.put ("message", ex.getMessage ());

If (ex.getCause ()! = null) {}

errorMap.put ("cause", ex.getCause () .getMessage ());

}

StringWriter sw = new StringWriter();

PrintWriter pw = new PrintWriter (sw);

ex.printStackTrace (pw);

errorMap.put ("stackTrace", sw.toString ());

Return errorMap;

}

It does not get confused about view missing .jsp Tomcat and the correct 500 error is returned to the Javascript code.  Note that in addition to the exception message, I add the message of "cause", if any, and the stack trace to the card.  So now the side javascript, you must change the JQuery code like this to extract the message and (in this example I do not display the stack trace)

{$("#settingsForm").submit (function ()}

var $form = $(this);

JSON = $form.serializeJson (),.

saveUrl = ns.webContextPath + "/ rest/services/saveSettings;

$.post (saveUrl, {json: json}, function() {})

$("#updateMsg").show ();

})

. Fail ({function (jqXHR, status, error)

var response = jqXHR.responseJSON;

Alert ("update failed:" + response.message + "")

("\nCause:" + response.cause);

$("#updateMsg").hide ();

});

return false is required to cancel the default submit event!

Returns false;

});

See the attached screenshot for the displayed error.

BTW, this error occurs in the Global Services sample because there is no such thing as the directory/var/lib/global services (on Mac) and properties of parameters can be saved.  Once you create this directory sample works :-)

Tags: VMware

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