initial commit of poker game

game-server/app/services/stateService.js

@@ -0,0 +1,64 @@
+var logger = require('pomelo-logger').getLogger('game-log', __filename);
+var REDIS_CONFIG = require('../../config/redis.json');
+var redis = require('redis');
+
+/**
+ * Maintain a persistent store .
+ *
+ * StateService is created by stateComponent.
+ *
+ * @class
+ * @constructor
+ */
+module.exports = StateService = function(){
+    this.prefix = 'POKER:';
+};
+
+StateService.prototype.start = function(cb){
+    this.redis.createClient(REDIS_CONFIG.port, REDIS_CONFIG.host, REDIS_CONFIG.opts);
+    this.redis.on('error', function(e){
+        logger.error('redis error', e.stack);
+        cb('connection-error');
+    });
+    this.redis.once('ready', function(){
+        logger.info('redis initialized!');
+        cb();
+    });
+};
+
+StateService.prototype.stop = function(cb){
+    if(this.redis){
+        logger.info('redis stopped');
+        this.redis.end();
+        this.redis = null;
+    }
+    cb();
+};
+
+StateService.prototype.push = function(uid, sid ,cb){
+    this.redis.sadd(genKey(this, uid), sid, function(err){
+        invokeCallback(cb, err);
+    });
+};
+
+StateService.prototype.remove = function(uid, sid, cb){
+    this.redis.srem(genKey(this, uid), sid, function(err){
+        invokeCallback(cb, err);
+    });
+};
+
+StateService.prototype.getSidsByUid = function(uid, cb){
+    this.redis.smembers(genKey(this, uid), function(err, list){
+        invokeCallback(cb, err, list);
+    });
+};
+
+var genKey = function(me, uid){
+    return me.prefix + ':' + uid;
+};
+
+var invokeCallback = function(cb){
+    if(!!cb && typeof cb === 'function'){
+        cb.apply(null, Array.prototype.slice.call(arguments, 1));
+    }
+};