[CCSDK-28] populated the seed code for dgbuilder

[ccsdk/distribution.git] / dgbuilder / core_nodes / core / 89-delay.js

diff --git a/dgbuilder/core_nodes/core/89-delay.js b/dgbuilder/core_nodes/core/89-delay.js
new file mode 100644 (file)
index 0000000..3c4e1c0
--- /dev/null
+++ b/dgbuilder/core_nodes/core/89-delay.js
@@ -0,0 +1,171 @@
+/**
+ * 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.
+ **/
+
+//Simple node to introduce a pause into a flow
+module.exports = function(RED) {
+    "use strict";
+    
+    var MILLIS_TO_NANOS = 1000000;
+    var SECONDS_TO_NANOS = 1000000000;
+    
+    function random(n) {
+        var wait = n.randomFirst + (n.diff * Math.random());
+        if (n.buffer.length > 0) {
+            n.send(n.buffer.pop());
+            n.randomID = setTimeout(function() {random(n);},wait);
+        } else {
+            n.randomID = -1;
+        }
+    }
+
+    function DelayNode(n) {
+        RED.nodes.createNode(this,n);
+
+        this.pauseType = n.pauseType;
+        this.timeoutUnits = n.timeoutUnits;
+        this.randomUnits = n.randomUnits;
+        this.rateUnits = n.rateUnits;
+
+        if (n.timeoutUnits === "milliseconds") {
+            this.timeout = n.timeout;
+        } else if (n.timeoutUnits === "seconds") {
+            this.timeout = n.timeout * 1000;
+        } else if (n.timeoutUnits === "minutes") {
+            this.timeout = n.timeout * (60 * 1000);
+        } else if (n.timeoutUnits === "hours") {
+            this.timeout = n.timeout * (60 * 60 * 1000);
+        } else if (n.timeoutUnits === "days") {
+            this.timeout = n.timeout * (24 * 60 * 60 * 1000);
+        }
+
+        if (n.rateUnits === "second") {
+            this.rate = 1000/n.rate;
+        } else if (n.rateUnits === "minute") {
+            this.rate = (60 * 1000)/n.rate;
+        } else if (n.rateUnits === "hour") {
+            this.rate = (60 * 60 * 1000)/n.rate;
+        } else if (n.rateUnits === "day") {
+            this.rate = (24 * 60 * 60 * 1000)/n.rate;
+        }
+
+        if (n.randomUnits === "milliseconds") {
+            this.randomFirst = n.randomFirst;
+            this.randomLast = n.randomLast;
+        } else if (n.randomUnits === "seconds") {
+            this.randomFirst = n.randomFirst * 1000;
+            this.randomLast = n.randomLast * 1000;
+        } else if (n.randomUnits === "minutes") {
+            this.randomFirst = n.randomFirst * (60 * 1000);
+            this.randomLast = n.randomLast * (60 * 1000);
+        } else if (n.randomUnits === "hours") {
+            this.randomFirst = n.randomFirst * (60 * 60 * 1000);
+            this.randomLast = n.randomLast * (60 * 60 * 1000);
+        } else if (n.randomUnits === "days") {
+            this.randomFirst = n.randomFirst * (24 * 60 * 60 * 1000);
+            this.randomLast = n.randomLast * (24 * 60 * 60 * 1000);
+        }
+
+        this.diff = this.randomLast - this.randomFirst;
+        this.name = n.name;
+        this.idList = [];
+        this.buffer = [];
+        this.intervalID = -1;
+        this.randomID = -1;
+        this.lastSent;
+        this.drop = n.drop;
+        var node = this;
+
+        if (this.pauseType === "delay") {
+            this.on("input", function(msg) {
+                var id;
+                id = setTimeout(function(){
+                    node.idList.splice(node.idList.indexOf(id),1);
+                    node.send(msg);
+                }, node.timeout);
+                this.idList.push(id);
+            });
+
+            this.on("close", function() {
+                for (var i=0; i<this.idList.length; i++ ) {
+                    clearTimeout(this.idList[i]);
+                }
+                this.idList = [];
+            });
+
+        } else if (this.pauseType === "rate") {
+            this.on("input", function(msg) {
+                if (!node.drop) {
+                    if ( node.intervalID !== -1) {
+                        node.buffer.push(msg);
+                        if (node.buffer.length > 0) {
+                            node.status({text:node.buffer.length});
+                        }
+                        if (node.buffer.length > 1000) {
+                            node.warn(this.name + " buffer exceeded 1000 messages");
+                        }
+                    } else {
+                        node.send(msg);
+                        node.intervalID = setInterval(function() {
+                            if (node.buffer.length === 0) {
+                                clearInterval(node.intervalID);
+                                node.intervalID = -1;
+                                node.status({text:""});
+                            }
+
+                            if (node.buffer.length > 0) {
+                                node.send(node.buffer.shift());
+                                node.status({text:node.buffer.length});
+                            }
+                        },node.rate);
+                    }
+                } else {
+                    var timeSinceLast;
+                    if (node.lastSent) {
+                        timeSinceLast = process.hrtime(node.lastSent);
+                    }
+                    if (!node.lastSent) { // ensuring that we always send the first message 
+                        node.lastSent = process.hrtime();
+                        node.send(msg);
+                    } else if ( ( (timeSinceLast[0] * SECONDS_TO_NANOS) + timeSinceLast[1] ) > (node.rate * MILLIS_TO_NANOS) ) {
+                        node.lastSent = process.hrtime();
+                        node.send(msg);
+                    }
+                }
+            });
+
+            this.on("close", function() {
+                clearInterval(this.intervalID);
+                this.buffer = [];
+            });
+
+        } else if (this.pauseType === "random") {
+            this.on("input",function(msg){
+                node.buffer.push(msg);
+                if (node.randomID === -1) {
+                    var wait = node.randomFirst + (node.diff * Math.random());
+                    node.randomID = setTimeout(function() {random(node);},wait);
+                }
+            });
+
+            this.on("close", function (){
+                if (this.randomID !== -1) {
+                    clearTimeout(this.randomID);
+                }
+            });
+        }
+    }
+    RED.nodes.registerType("delay",DelayNode);
+}