Grails Events Push plugin not getting a response from server event

问题

I have been trying to get the grails events push plugin to work but cant seem to get response data from the server when the savedToDo event is called. I can see the logs in my console for the data coming to the server and executing the service code, but the client doesnt seem to be getting back a response. My code is as follows :

MyService.groovy

package eventspush

import grails.converters.JSON

import grails.events.*

class MyService {

   //will receive client events from 'saveTodo' topic
    @Listener(namespace='browser') 
    def saveTodo(Map data){
        log.info(data)
        data.moreData = "There we go...."
        event('savedTodo', data) // will trigger registered browsers on 'savedTodo' topic
    }
}

conf/MyEvents.groovy

events = {
    "savedTodo"  browser: true, browserFilter: { message, request ->    
     return true
  }
}

index.gsp

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
    <r:require modules="grailsEvents"/>
    <meta name='layout' content='main'/>
    <r:script>
    $(document).ready(function () {

      /*
       Register a grailsEvents handler for this window, constructor can take a root URL,
       a path to event-bus servlet and options. There are sensible defaults for each argument
       */
      window.grailsEvents = new grails.Events("${createLink(uri: '')}", {logLevel:"debug", transport:'websocket'});

        var data = new Object();

        data.name="some name"

        grailsEvents.send('saveTodo', data); //will send data to server topic 'saveTodo'
        grailsEvents.on('savedTodo', function (data) {
        console.log(data)
        }, {});


    });
    </r:script>
</head>

My problem is that I am not seeing any data being logged in the console. Does anybody have any idea what I am doing wrong?

Edit, I have worked out what was wrong and I have updated the MyEvents.groovy accordingly, the above code is now working

回答1:

It seems that you have added the 'savedTodo' mapping to the PushEvents.groovy file within the Plugin directory. This is wrong!

You should add your own *Events.groovy file within the conf folder of your own project and leave the PushEvents.groovy file of the plugin untouched!

~~The other code looks fine so far ;)~~

There's a typo within your JavaScript section in index.gsp:

it reads:

grailsEvents.send('saveTodo', data);

when it should be:

grailsEvents.send('savedTodo', data);

you omitted the "d" ... ;)

回答2:

So I found out what what was causing the data not being pushed to the client.

I edited the line in MyService.groovy from being

event('savedTodo', data)

event(topic:'savedTodo', data:data)

It is now working as expected

来源：https://stackoverflow.com/questions/14943049/grails-events-push-plugin-not-getting-a-response-from-server-event

标签

grails

push