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Wirecloud plugin providing PubSub support.

Project description

Installation

You can get wirecloud-pubsub from PyPI with…

# pip install wirecloud-pubsub

Since wirecloud_pubsub uses django.contrib.static functionalities, you should add it to your INSTALLED_APPS in settings.py:

INSTALLED_APPS = (
    ...
    'wirecloud_pubsub',
    ...
)

You also have to add it to your WIRECLOUD_PLUGINS:

WIRECLOUD_PLUGINS = (
    ...
    'wirecloud_pubsub.plugins.PubSubPlugin',
    ...
)

As last step, add a DEFAULT_SILBOPS_BROKER setting with the URL of the broker to use:

DEFAULT_SILBOPS_BROKER = 'http://pubsub.server.com:8080/silbops/CometAPI'

Don’t forget to run the collectstatic and compress commands on your Wirecloud installation:

$ ./manage.py collectstatic
$ ./manage.py compress

Usage

Once wirecloud-pubsub is installed and activated, widgets and operators can take advantage the PubSub functionallities through the MashupApplication.SilboPS object. Currently, the MashupApplication.SilboPS object only exports the PubEndPoint, SubEndPoint and Filter classes defined by the original javascript bindings provided by SilboPS. Full documentation of SilboPS is available at https://svn.forge.morfeo-project.org/4caast/trunk/WP6/pubsub/README.md.

Examples

Publishing

var endpoint;

function publish() {
    endpoint.publish({'value': 'Hello world!'});
}

function start_publishing() {
    endpoint.advertise({'value', ['str']});
    setInterval(publish, 2000);
}

endpoint = new MashupApplication.SilboPS.PubEndPoint({
    onopen: function(endpoint) {
        alert('Endpoint ready');
        start_publishing();
    },
    onclose: function(endpoint) {
        alert('Endpoint closed');
    }
});

Subscribing

var endpoint, filter;

filter = new MashupApplication.SilboPS.Filter();
filter.constrain('fqn').startsWith('es.upm.fi.')
        .constrain('eventType').eq('monitoring');

endpoint = new MashupApplication.SilboPS.SubEndPoint({
    onopen: function (endpoint) {
        endpoint.subscribe(filter);
        alert('Endpoint ready');
    },
    onclose: function (endpoint) {
        alert('Endpoint closed');
    },
    onnotify: function (endpoint, data) {
        var notification = data.notification;
        alert(notification.fqn);
    }
});

Project details


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