[CCSDK-28] populated the seed code for dgbuilder

[ccsdk/distribution.git] / dgbuilder / red / nodes / index.js

diff --git a/dgbuilder/red/nodes/index.js b/dgbuilder/red/nodes/index.js
new file mode 100644 (file)
index 0000000..3d5ad71
--- /dev/null
+++ b/dgbuilder/red/nodes/index.js
@@ -0,0 +1,134 @@
+/**
+ * Copyright 2013, 2014 IBM Corp.
+ *
+ * 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 registry = require("./registry");
+var credentials = require("./credentials");
+var flows = require("./flows");
+var Node = require("./Node");
+
+/**
+ * Registers a node constructor
+ * @param type - the string type name
+ * @param constructor - the constructor function for this node type
+ * @param opts - optional additional options for the node
+ */
+function registerType(type,constructor,opts) {
+    if (opts && opts.credentials) {
+        credentials.register(type,opts.credentials);
+    }
+    registry.registerType(type,constructor);    
+}
+
+/**
+ * Called from a Node's constructor function, invokes the super-class
+ * constructor and attaches any credentials to the node.
+ * @param node the node object being created
+ * @param def the instance definition for the node 
+ */
+function createNode(node,def) {
+    Node.call(node,def);
+    var creds = credentials.get(node.id);
+    if (creds) {
+        node.credentials = creds;
+    }
+}
+
+function init(_settings,storage) {
+    credentials.init(storage);
+    flows.init(storage);
+    registry.init(_settings);
+}
+
+function checkTypeInUse(id) {
+    var nodeInfo = registry.getNodeInfo(id);
+    if (!nodeInfo) {
+        throw new Error("Unrecognised id: "+info);
+    }
+    var inUse = {};
+    flows.each(function(n) {
+        inUse[n.type] = (inUse[n.type]||0)+1;
+    });
+    var nodesInUse = [];
+    nodeInfo.types.forEach(function(t) {
+        if (inUse[t]) {
+            nodesInUse.push(t);
+        }
+    });
+    if (nodesInUse.length > 0) {
+        var msg = nodesInUse.join(", ");
+        throw new Error("Type in use: "+msg);
+    }
+}
+
+function removeNode(id) {
+    checkTypeInUse(id);
+    return registry.removeNode(id);
+}
+
+function removeModule(module) {
+    var info = registry.getNodeModuleInfo(module);
+    for (var i=0;i<info.nodes.length;i++) {
+        checkTypeInUse(info.nodes[i]);
+    }
+    return registry.removeModule(module);
+}
+
+
+function disableNode(id) {
+    checkTypeInUse(id);
+    return registry.disableNode(id);
+}
+
+module.exports = {
+    // Lifecycle
+    init: init,
+    load: registry.load,
+    
+    // Node registry
+    createNode: createNode,
+    getNode: flows.get,
+    
+    addNode: registry.addNode,
+    removeNode: removeNode,
+    
+    addModule: registry.addModule,
+    removeModule: removeModule,
+    
+    enableNode: registry.enableNode,
+    disableNode: disableNode,
+    
+    // Node type registry
+    registerType: registerType,
+    getType: registry.get,
+    getNodeInfo: registry.getNodeInfo,
+    getNodeModuleInfo: registry.getNodeModuleInfo,
+    getNodeList: registry.getNodeList,
+    getNodeConfigs: registry.getNodeConfigs,
+    getNodeConfig: registry.getNodeConfig,
+    clearRegistry: registry.clear,
+    cleanNodeList: registry.cleanNodeList,
+    
+    // Flow handling
+    loadFlows: flows.load,
+    stopFlows: flows.stopFlows,
+    setFlows: flows.setFlows,
+    getFlows: flows.getFlows,
+    
+    // Credentials
+    addCredentials: credentials.add,
+    getCredentials: credentials.get,
+    deleteCredentials: credentials.delete
+}
+