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// The contents of this file are subject to the Mozilla Public License
// Version 1.1 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License
// at http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
// the License for the specific language governing rights and
// limitations under the License.
//
// The Original Code is RabbitMQ.
//
// The Initial Developer of the Original Code is VMware, Inc.
// Copyright (c) 2007-2012 VMware, Inc. All rights reserved.
//
function JsonRpc_ModuleFactory(Support) {
var requestId = 1;
function Transaction(serviceUrl, methodName, params, options) {
this.options = {
debug: false,
debugLogger: alert,
timeout: 0 /* milliseconds; zero means "do not specify" */
};
Support.extend(this.options, options || {});
this.serviceUrl = serviceUrl;
this.methodName = methodName;
this.params = params;
this.error = null;
this.reply = null;
this.replyReady = 0;
this.callbacks = [];
this.errorCallbacks = [];
this.sendRequest();
}
Support.extend(Transaction.prototype,
{
buildRequest: function() {
return { version: "1.1",
id: requestId++,
method: this.methodName,
params: this.params };
},
sendRequest: function() {
var that = this;
this.request = Support.ajaxPost(this.serviceUrl,
this.options.timeout
? {'X-JSON-RPC-Timeout': this.options.timeout}
: {},
JSON.stringify(this.buildRequest()),
function (ajaxRequest) {
that.receiveReply(ajaxRequest);
});
},
debugLog: function(x) {
if (this.options.debug) {
this.options.debugLogger(x);
}
},
receiveReply: function(ajaxRequest) {
var response;
try {
response = JSON.parse(ajaxRequest.responseText);
} catch (e) {
if (this.options.debug) {
this.debugLog("Error parsing JSON:" +
"\nService: " + JSON.stringify(this.serviceUrl) +
"\nResponse: " + ajaxRequest.responseText);
}
throw e;
}
if (response.error) {
if (this.options.debug) {
this.debugLog("JsonRPC error:" +
"\nService: " + JSON.stringify(this.serviceUrl) +
"\nMethod: " + JSON.stringify(this.methodName) +
"\nParams: " + JSON.stringify(this.params) +
"\nResponse: " + JSON.stringify(response).replace(/\\n/g, "\n"));
}
this.error = response.error;
Support.each(this.errorCallbacks,
function (cb) {
try { cb(response.error, true); }
catch (err) {}
});
} else {
var reply = response.result;
this.reply = reply;
this.replyReady = 1;
Support.each(this.callbacks,
function (cb) {
try { cb(reply, false); }
catch (err) {}
});
}
},
addReplyTransformer: function(xformer) {
var that = this;
var oldAddCallback = that.addCallback;
that.addCallback = function(cb) {
return oldAddCallback.apply(that,
[function(reply, is_error) {
cb(is_error ? reply : xformer(reply), is_error);
}]);
};
return that;
},
addCallback: function(cb) {
this.callbacks.push(cb);
if (this.replyReady) {
try { cb(this.reply, false); }
catch (err) {}
}
return this;
},
addErrorCallback: function(cb) {
this.errorCallbacks.push(cb);
if (this.error) {
try { cb(this.error, true); }
catch (err) {}
}
return this;
}
});
function Service(serviceUrl, onReady, options) {
this.options = {
transactionClass: Transaction,
timeout: 0, /* milliseconds; zero means "do not specify" */
debug: false,
debugLogger: alert
};
Support.extend(this.options, options || {});
this.serviceUrl = serviceUrl;
var svc = this;
var txn = new (this.options.transactionClass)(serviceUrl,
"system.describe",
[],
{debug: this.options.debug,
debugLogger: this.options.debugLogger});
txn.addCallback(receiveServiceDescription);
function receiveServiceDescription(sd) {
svc.serviceDescription = sd;
Support.each(svc.serviceDescription.procs,
function (desc) {
svc.installGenericProxy(desc);
});
onReady();
}
};
Support.extend(Service.prototype,
{
installGenericProxy: function(desc) {
if (this.options.debug) {
this.options.debugLogger({installGenericProxy: desc});
}
this[desc.name] = function () {
var actuals = [];
while (actuals.length < arguments.length) {
actuals.push(arguments[actuals.length]);
}
while (actuals.length < desc.params.length) {
actuals.push(null);
}
return new (this.options.transactionClass)(this.serviceUrl,
desc.name,
actuals,
{
debug: this.options.debug,
debugLogger:
this.options.debugLogger,
timeout: this.options.timeout
});
};
}
});
return {
Transaction: Transaction,
Service: Service
}
}
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