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node-red/red/runtime/nodes/context/memory.js

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/**
* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var util = require("../../util");
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var when = require("when");
function Memory(config){
this.data = {};
}
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Memory.prototype.open = function(){
return when.resolve();
};
Memory.prototype.close = function(){
return when.resolve();
};
Memory.prototype.get = function(scope, key) {
if(!this.data[scope]){
return undefined;
}
return util.getMessageProperty(this.data[scope],key);
};
Memory.prototype.set =function(scope, key, value) {
if(!this.data[scope]){
this.data[scope] = {};
}
util.setMessageProperty(this.data[scope],key,value);
};
Memory.prototype.keys = function(scope){
if(!this.data[scope]){
return [];
}
if (scope !== "global") {
return Object.keys(this.data[scope]);
} else {
return Object.keys(this.data[scope]).filter(function (key) {
return key !== "set" && key !== "get" && key !== "keys" && key !== "setAsync" && key !== "getAsync" && key !== "keysAsync";
});
}
};
Memory.prototype.getAsync = function(scope, key) {
return when.resolve(this.get(scope, key));
};
Memory.prototype.setAsync =function(scope, key, value) {
return when.resolve(this.set(scope, key, value));
};
Memory.prototype.keysAsync = function(scope){
return when.resolve(this.keys(scope));
};
Memory.prototype.delete = function(scope){
delete this.data[scope];
return Promise.resolve();
};
Memory.prototype.clean = function(activeNodes){
for(var id in this.data){
if(this.data.hasOwnProperty(id) && id !== "global"){
var idParts = id.split(":");
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if(activeNodes.indexOf(idParts[0]) === -1){
delete this.data[id];
}
}
}
return Promise.resolve();
}
Memory.prototype.setGlobalContext= function(seed){
this.data["global"] = seed;
};
module.exports = function(config){
return new Memory(config);
};