Added contributors, MRU cache cleanup, closes #46

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - 0.4
+  - 0.4.12
   - 0.6
 before_install:
   - git submodule init && git submodule --quiet update

lib/abstract-class.js

@@ -5,6 +5,7 @@ var Validatable = require('./validatable').Validatable;
 var Hookable = require('./hookable').Hookable;
 var util = require('util');
 var jutil = require('./jutil');
+var DEFAULT_CACHE_LIMIT = 1000;
 
 exports.AbstractClass = AbstractClass;
 
@@ -154,7 +155,7 @@ AbstractClass.create = function (data, callback) {
             this._adapter().create(modelName, data, function (err, id) {
                 if (id) {
                     defineReadonlyProp(obj, 'id', id);
-                    this.constructor.cache[id] = obj;
+                    addToCache(this.constructor, obj);
                 }
                 done.call(this, function () {
                     if (callback) {
@@ -178,14 +179,15 @@ AbstractClass.find = function find(id, cb) {
     this.schema.adapter.find(this.modelName, id, function (err, data) {
         var obj = null;
         if (data) {
-            if (this.cache[data.id]) {
-                obj = this.cache[data.id];
+            var cached = getCached(this, data.id);
+            if (cached) {
+                obj = cached;
                 substractDirtyAttributes(obj, data);
                 this.call(obj, data);
             } else {
                 data.id = id;
                 obj = new this(data);
-                this.cache[data.id] = obj;
+                addToCache(this, id);
             }
         }
         cb(err, obj);
@@ -209,14 +211,15 @@ AbstractClass.all = function all(params, cb) {
             collection = data.map(function (d) {
                 var obj = null;
                 // do not create different instances for the same object
-                if (d.id && constr.cache[d.id]) {
-                    obj = constr.cache[d.id];
+                var cached = getCached(constr, d.id);
+                if (cached) {
+                    obj = cached;
                     // keep dirty attributes untouthed (remove from dataset)
                     substractDirtyAttributes(obj, d);
                     constr.call(obj, d);
                 } else {
                     obj = new constr(d);
-                    if (d.id) constr.cache[d.id] = obj;
+                    if (obj.id) addToCache(constr, obj);
                 }
                 return obj;
             });
@@ -248,9 +251,7 @@ function substractDirtyAttributes(object, data) {
 AbstractClass.destroyAll = function destroyAll(cb) {
     this.schema.adapter.destroyAll(this.modelName, function (err) {
         if (!err) {
-            Object.keys(this.cache).forEach(function (id) {
-                delete this.cache[id];
-            }.bind(this));
+            clearCache(this);
         }
         cb(err);
     }.bind(this));
@@ -365,7 +366,7 @@ AbstractClass.prototype.toObject = function (onlySchema) {
 AbstractClass.prototype.destroy = function (cb) {
     this.trigger('destroy', function (destroyed) {
         this._adapter().destroy(this.constructor.modelName, this.id, function (err) {
-            delete this.constructor.cache[this.id];
+            removeFromCache(this.constructor, this.id);
             destroyed(function () {
                 cb && cb(err);
             });
@@ -442,7 +443,7 @@ AbstractClass.prototype.propertyChanged = function (attr) {
 };
 
 AbstractClass.prototype.reload = function (cb) {
-    var obj = this.constructor.cache[this.id];
+    var obj = getCached(this.constructor, this.id);
     if (obj) {
         obj.reset();
     }
@@ -633,6 +634,7 @@ function defineScope(cls, targetClass, name, params, methods) {
 
 // helper methods
 //
+
 function isdef(s) {
     var undef;
     return s !== undef;
@@ -657,3 +659,37 @@ function defineReadonlyProp(obj, key, value) {
     });
 }
 
+function addToCache(constr, obj) {
+    touchCache(constr, obj.id);
+    constr.cache[obj.id] = obj;
+}
+
+function touchCache(constr, id) {
+    var cacheLimit = constr.CACHE_LIMIT || DEFAULT_CACHE_LIMIT;
+
+    var ind = constr.mru.indexOf(id);
+    if (~ind) constr.mru.splice(ind, 1);
+    if (constr.mru.length >= cacheLimit * 2) {
+        for (var i = 0; i < cacheLimit;i += 1) {
+            delete constr.cache[constr.mru[i]];
+        }
+        constr.mru.splice(0, cacheLimit);
+    }
+}
+
+function getCached(constr, id) {
+    if (id) touchCache(constr, id);
+    return id && constr.cache[id];
+}
+
+function clearCache(constr) {
+    constr.cache = {};
+    constr.mru = [];
+}
+
+function removeFromCache(constr, id) {
+    var ind = constr.mru.indexOf(id);
+    if (!~ind) constr.mru.splice(ind, 1);
+    delete constr.cache[id];
+}
+

lib/schema.js

@@ -154,6 +154,7 @@ Schema.prototype.define = function defineClass(className, properties, settings)
     hiddenProperty(newClass, 'schema', schema);
     hiddenProperty(newClass, 'modelName', className);
     hiddenProperty(newClass, 'cache', {});
+    hiddenProperty(newClass, 'mru', []);
 
     // setup inheritance
     newClass.__proto__ = AbstractClass;

package.json

@@ -1,9 +1,20 @@
 {
   "name": "jugglingdb",
-  "author": "Anatoliy Chakkaev",
   "description": "ORM for every database: redis, mysql, neo4j, mongodb, postgres, sqlite",
-  "version": "0.1.3",
+  "version": "0.1.4",
+  "author": "Anatoliy Chakkaev <rpm1602@gmail.com>",
+  "contributors": [
+    { "name": "Anatoliy Chakkaev",     "email": "rpm1602@gmail.com" },
+    { "name": "Julien Guimont",        "email": "julien.guimont@gmail.com" },
+    { "name": "Henri Bergius",         "email": "henri.bergius@iki.fi" },
+    { "name": "redvulps",              "email": "fabopereira@gmail.com" },
+    { "name": "Amir M. Mahmoudi",      "email": "a@geeknux.com" },
+    { "name": "Justinas Stankevičius", "email": "justinas@justinas.me" },
+    { "name": "Felipe Sateler",        "email": "fsateler@gmail.com" },
+    { "name": "Rick O'Toole",          "email": "patrick.n.otoole@gmail.com" }
+  ],
   "repository": {
+    "type": "git",
     "url": "https://github.com/1602/jugglingdb"
   },
   "main": "index.js",
@@ -11,22 +22,22 @@
     "test": "nodeunit test/*_test*"
   },
   "engines": [
-    "node >= 0.4.0"
+    "node >= 0.4.12"
   ],
   "dependencies": {
-    "node-uuid": "*"
+    "node-uuid":     ">= 1.3.3"
   },
   "devDependencies": {
+    "coffee-script": ">= 1.2.0",
+    "nodeunit":      ">= 0.6.4",
     "redis":         ">= 0.6.7",
     "mongoose":      ">= 2.2.3",
     "mysql":         ">= 0.9.4",
-    "sequelize": "*",
-    "pg": "*",
-    "sqlite3": "*",
-    "nodeunit": ">= 0",
-    "coffee-script": ">= 0",
-    "riak-js": ">= 0",
-    "neo4j": ">= 0",
-    "mongodb": "*"
+    "pg":            ">= 0.6.9",
+    "sqlite3":       ">= 2.1.1",
+    "riak-js":       ">= 0.4.1",
+    "neo4j":         ">= 0.2.5",
+    "mongodb":       ">= 0.9.9",
+    "felix-couchdb": ">= 1.0.3"
   }
 }