redis/node-redis
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Support new and imrpoved MULTI syntax.

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This commit is contained in:
Matt Ranney
2010-09-24 13:16:02 -07:00
parent 047d367f8c
commit d19e893f28
1 changed files with 45 additions and 18 deletions
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63
index.js
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@@ -681,42 +681,69 @@ exports.commands.forEach(function (command) {
}; };
}); });
function Multi(client) { function Multi(client, args) {
this.client = client; this.client = client;
this.queue = []; this.queue = [["MULTI"]];
this.queue.push(['MULTI']); if (Array.isArray(args)) {
this.queue = this.queue.concat(args);
}
} }
exports.commands.forEach(function (command) { exports.commands.forEach(function (command) {
Multi.prototype[command.toLowerCase()] = function () { Multi.prototype[command.toLowerCase()] = function () {
var args = to_array(arguments); var args = to_array(arguments);
args.unshift(command); // put command at the beginning args.unshift(command);
this.queue.push(args); this.queue.push(args);
return this; return this;
}; };
}); });
Multi.prototype.exec = function(fn){ Multi.prototype.exec = function(callback) {
var done; var done = false, self = this;
this.queue.push(['EXEC']);
this.queue.forEach(function(args){ // drain queue, callback will catch "QUEUED" or error
this.queue.forEach(function(args, index) {
var command = args.shift(); var command = args.shift();
this.client[command](args, function(err, reply){ if (typeof args[args.length - 1] === "function") {
if (done) return; args = args.slice(0, -1);
}
this.client[command](args, function (err, reply){
if (err) { if (err) {
done = true; var cur = self.queue[index];
fn(new Error(err)); if (typeof cur[cur.length -1] === "function") {
} else if ('EXEC' == command) { cur[cur.length - 1](err);
done = true; } else {
fn(null, reply); throw new Error(err);
}
self.queue.splice(index, 1);
} }
}); });
}, this); }, this);
this.client.EXEC(function (err, reply) {
if (err) {
if (callback) {
callback(new Error(err));
} else {
throw new Error(err);
}
}
self.queue.slice(1).forEach(function (args, index) {
if (typeof args[args.length - 1] === "function") {
args[args.length - 1](null, reply[index]);
}
});
if (callback) {
callback(null, reply);
}
});
}; };
RedisClient.prototype.__defineGetter__('multi', function(){ RedisClient.prototype.multi = function (args) {
return new Multi(this); return new Multi(this, args);
}); };
exports.createClient = function (port_arg, host_arg, options) { exports.createClient = function (port_arg, host_arg, options) {
var port = port_arg || default_port, var port = port_arg || default_port,