You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
112 lines
2.9 KiB
112 lines
2.9 KiB
/*
|
|
This file is part of ethereum.js.
|
|
|
|
ethereum.js is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ethereum.js is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/** @file requestmanager.js
|
|
* @authors:
|
|
* Jeffrey Wilcke <jeff@ethdev.com>
|
|
* Marek Kotewicz <marek@ethdev.com>
|
|
* Marian Oancea <marian@ethdev.com>
|
|
* Gav Wood <g@ethdev.com>
|
|
* @date 2014
|
|
*/
|
|
|
|
var jsonrpc = require('./jsonrpc');
|
|
var c = require('./const');
|
|
|
|
/**
|
|
* It's responsible for passing messages to providers
|
|
* It's also responsible for polling the ethereum node for incoming messages
|
|
* Default poll timeout is 1 second
|
|
*/
|
|
var requestManager = function() {
|
|
var polls = [];
|
|
var timeout = null;
|
|
var provider;
|
|
|
|
var send = function (data) {
|
|
var payload = jsonrpc.toPayload(data.method, data.params);
|
|
|
|
if (!provider) {
|
|
console.error('provider is not set');
|
|
return null;
|
|
}
|
|
|
|
var result = provider.send(payload);
|
|
|
|
if (!jsonrpc.isValidResponse(result)) {
|
|
console.log(result);
|
|
return null;
|
|
}
|
|
|
|
return result.result;
|
|
};
|
|
|
|
var setProvider = function (p) {
|
|
provider = p;
|
|
};
|
|
|
|
/*jshint maxparams:4 */
|
|
var startPolling = function (data, pollId, callback, uninstall) {
|
|
polls.push({data: data, id: pollId, callback: callback, uninstall: uninstall});
|
|
};
|
|
/*jshint maxparams:3 */
|
|
|
|
var stopPolling = function (pollId) {
|
|
for (var i = polls.length; i--;) {
|
|
var poll = polls[i];
|
|
if (poll.id === pollId) {
|
|
polls.splice(i, 1);
|
|
}
|
|
}
|
|
};
|
|
|
|
var reset = function () {
|
|
polls.forEach(function (poll) {
|
|
poll.uninstall(poll.id);
|
|
});
|
|
polls = [];
|
|
|
|
if (timeout) {
|
|
clearTimeout(timeout);
|
|
timeout = null;
|
|
}
|
|
poll();
|
|
};
|
|
|
|
var poll = function () {
|
|
polls.forEach(function (data) {
|
|
var result = send(data.data);
|
|
if (!(result instanceof Array) || result.length === 0) {
|
|
return;
|
|
}
|
|
data.callback(result);
|
|
});
|
|
timeout = setTimeout(poll, c.ETH_POLLING_TIMEOUT);
|
|
};
|
|
|
|
poll();
|
|
|
|
return {
|
|
send: send,
|
|
setProvider: setProvider,
|
|
startPolling: startPolling,
|
|
stopPolling: stopPolling,
|
|
reset: reset
|
|
};
|
|
};
|
|
|
|
module.exports = requestManager;
|
|
|
|
|