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simplified synchronous polling

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This commit is contained in:
Marek Kotewicz
2015-01-22 17:57:26 +01:00
parent 3073511e30
commit 81bbe8c93b
5 changed files with 34 additions and 50 deletions
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34
lib/providermanager.js
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@ -35,19 +35,26 @@ var web3 = require('./web3'); // jshint ignore:line
* and provider manager polling mechanism is not used
*/
var ProviderManager = function() {
this.queued = [];
this.polls = [];
this.ready = false;
this.provider = undefined;
this.id = 1;
var self = this;
var poll = function () {
if (self.provider && self.provider.poll) {
if (self.provider) {
self.polls.forEach(function (data) {
data.data._id = self.id;
self.id++;
self.provider.poll(data.data, data.id);
var result = self.provider.send(data.data);
result = JSON.parse(result);
// dont call the callback if result is an error, empty array or false
if (result.error || (result.result instanceof Array ? result.result.length === 0 : !result.result)) {
return;
}
data.callback(result);
});
}
setTimeout(poll, 12000);
@ -55,7 +62,7 @@ var ProviderManager = function() {
poll();
};
/// sends outgoing requests, if provider is not available, enqueue the request
/// sends outgoing requests
ProviderManager.prototype.send = function(data) {
data.args = data.args || [];
@ -74,26 +81,13 @@ ProviderManager.prototype.send = function(data) {
/// setups provider, which will be used for sending messages
ProviderManager.prototype.set = function(provider) {
if(this.provider !== undefined && this.provider.unload !== undefined) {
this.provider.unload();
}
this.provider = provider;
this.ready = true;
};
/// @returns true if the provider i properly set
ProviderManager.prototype.installed = function() {
return this.provider !== undefined;
};
/// this method is only used, when we do not have native qt bindings and have to do polling on our own
/// should be callled, on start watching for eth/shh changes
ProviderManager.prototype.startPolling = function (data, pollId) {
if (!this.provider || !this.provider.poll) {
return;
}
this.polls.push({data: data, id: pollId});
ProviderManager.prototype.startPolling = function (data, pollId, callback) {
this.polls.push({data: data, id: pollId, callback: callback});
};
/// should be called to stop polling for certain watch changes