mirror of
https://github.com/node-red/node-red.git
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97 lines
3.2 KiB
JavaScript
97 lines
3.2 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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var RED = require(process.env.NODE_RED_HOME+"/red/red");
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var util = require("util");
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var redis = require("redis");
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var hashFieldRE = /^([^=]+)=(.*)$/;
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var redisConnectionPool = function() {
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var connections = {};
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var obj = {
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get: function(host,port) {
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var id = host+":"+port;
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if (!connections[id]) {
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connections[id] = redis.createClient(port,host);
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connections[id].on("error",function(err) {
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util.log("[redis] "+err);
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});
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connections[id].on("connect",function() {
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util.log("[redis] connected to "+host+":"+port);
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});
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connections[id]._id = id;
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connections[id]._nodeCount = 0;
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}
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connections[id]._nodeCount += 1;
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return connections[id];
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},
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close: function(connection) {
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connection._nodeCount -= 1;
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if (connection._nodeCount == 0) {
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if (connection) {
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clearTimeout(connection.retry_timer);
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connection.end();
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}
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delete connections[connection._id];
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}
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}
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};
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return obj;
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}();
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function RedisOutNode(n) {
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RED.nodes.createNode(this,n);
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this.port = n.port||"6379";
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this.hostname = n.hostname||"127.0.0.1";
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this.key = n.key;
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this.structtype = n.structtype;
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this.client = redisConnectionPool.get(this.hostname,this.port);
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this.on("input", function(msg) {
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if (msg != null) {
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var k = this.key || msg.topic;
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if (k) {
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if (this.structtype == "string") {
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this.client.set(k,msg.payload);
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} else if (this.structtype == "hash") {
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var r = hashFieldRE.exec(msg.payload);
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if (r) {
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this.client.hset(k,r[1],r[2]);
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} else {
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this.warn("Invalid payload for redis hash");
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}
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} else if (this.structtype == "set") {
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this.client.sadd(k,msg.payload);
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} else if (this.structtype == "list") {
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this.client.rpush(k,msg.payload);
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}
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} else {
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this.warn("No key or topic set");
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}
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}
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});
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}
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RED.nodes.registerType("redis out",RedisOutNode);
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RedisOutNode.prototype.close = function() {
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redisConnectionPool.close(this.client);
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}
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