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pubsub: Auto-ack messages optionally #31

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merged 2 commits into from
Jul 23, 2014
Merged

pubsub: Auto-ack messages optionally #31

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6f96cb5
Adding missing jsdocs.
rakyll Jul 23, 2014
38bed99
Automatically acknowledging messages if autoAck is set.
rakyll Jul 23, 2014
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44 changes: 31 additions & 13 deletions lib/pubsub/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -17,11 +17,19 @@
var conn = require('../common/connection.js'),
util = require('../common/util.js');

var PUBSUB_BASE_URL = 'https://www.googleapis.com/pubsub/v1beta1',
SCOPES = [
'https://www.googleapis.com/auth/pubsub',
'https://www.googleapis.com/auth/cloud-platform'
];
/**
* Base URL for Pub/Sub API.
* @type {String}
*/
var PUBSUB_BASE_URL = 'https://www.googleapis.com/pubsub/v1beta1';
/**
* Required scopes for Pub/Sub API.
* @type {Array}
*/
var SCOPES = [
'https://www.googleapis.com/auth/pubsub',
'https://www.googleapis.com/auth/cloud-platform'
];

// TODO(jbd): Emit message and error events if in polled-mode.
// sub.on('meessage', console.log)
Expand All @@ -48,21 +56,31 @@ Subscription.prototype.ack = function(ids, callback) {

/**
* Pulls from the subscribed topic.
* @param {Boolean} returnImmediately If set, the system will respond immediately.
* Otherwise, wait until new messages are
* available. Returns if timeout is reached.
* @param {Boolean} autoAck Automatically acknowledges the
* backend after pulling. By default, true.
* @param {Function} callback Callback function.
* @param {Boolean} opts.returnImmediately If set, the system will respond immediately.
* Otherwise, wait until new messages are
* available. Returns if timeout is reached.
* @param {Boolean} opts.autoAck Automatically acknowledges the
* message once it's pulled.
* @param {Function} callback Callback function.
*/
Subscription.prototype.pull = function(opts, callback) {
// TODO(jbd): Make opts optional.
var that = this;
var autoAck = !!opts.autoAck;
var body = {
subscription: this.name,
returnImmediately: !!opts.returnImmediately
};
// TODO(jbd): Auto acknowledge.
this.conn.makeReq('POST', 'subscriptions/pull', null, body, callback);
this.conn.makeReq('POST', 'subscriptions/pull', null, body, function(err, message) {
if (err) { return callback(err); }
if (!autoAck) {
return callback(null, message);
}
that.ack(message.ackId, function(err) {
if (err) { return callback(err); }
callback(null, message);
});
});
};

/**
Expand Down