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110 lines
3.0 KiB
JavaScript
110 lines
3.0 KiB
JavaScript
/**
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* Copyright 2013 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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// Simple node to introduce a pause into a flow
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// Require main module
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var RED = require("../../red/red");
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// main node definition
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function DelayNode(n) {
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RED.nodes.createNode(this,n);
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this.pauseType = n.pauseType;
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this.timeoutUnits = n.timeoutUnits;
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this.rateUnits = n.rateUnits;
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if (n.timeoutUnits == "milliseconds") {
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this.timeout = n.timout;
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} else if (n.timeoutUnits == "seconds") {
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this.timeout = n.timeout * 1000;
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} else if (n.timeoutUnits == "minutes") {
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this.timeout = n.timeout * (60 * 1000);
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} else if (n.timeoutUnits == "hours") {
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this.timeout = n.timeout * (60 * 60 * 1000);
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} else if (n.timeoutUnits == "days") {
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this.timeout = n.timeout * (24 * 60 * 60 * 1000);
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}
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if (n.rateUnits == "second") {
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this.rate = 1000/n.rate;
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} else if (n.rateUnits == "minute") {
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this.rate = (60 * 1000)/n.rate;
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} else if (n.rateUnits == "hour") {
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this.rate = (60 * 60 * 1000)/n.rate;
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} else if (n.rateUnits == "day") {
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this.rate = (24 * 60 * 60 * 1000)/n.rate;
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}
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this.name = n.name;
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this.idList = [];
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this.buffer = [];
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this.intervalID = -1;
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var node= this;
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if (this.pauseType == "delay") {
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this.on("input", function(msg) {
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var node= this;
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var id;
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id = setTimeout(function(){
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node.idList.splice(node.idList.indexOf(id),1);
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node.send(msg);
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}, node.timeout);
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this.idList.push(id);
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});
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} else if (this.pauseType == "rate") {
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this.on("input", function(msg) {
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if ( node.intervalID != -1) {
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node.buffer.push(msg);
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if (node.buffer.length > 1000) {
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node.warn(this.name + " buffer exceeded 1000 messages");
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}
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} else {
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node.send(msg);
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node.intervalID = setInterval(function() {
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if (node.buffer.length == 0) {
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clearInterval(node.intervalID);
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node.intervalID = -1;
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}
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if (node.buffer.length > 0) {
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node.send(node.buffer.shift());
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}
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},node.rate);
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}
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});
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}
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}
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// register node
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RED.nodes.registerType("delay",DelayNode);
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DelayNode.prototype.close = function() {
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if (this.pauseType == "delay") {
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for (var i=0; i<this.idList.length; i++ ) {
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clearTimeout(this.idList[i]);
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}
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this.idList = [];
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} else if (this.pauseType == "rate") {
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clearInterval(this.intervalID);
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this.buffer = [];
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}
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}
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