100 lines
3.4 KiB
JavaScript
100 lines
3.4 KiB
JavaScript
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module.exports = function(RED) {
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"use strict";
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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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RED.log.error(err);
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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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if (this.client.connected) {
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this.status({fill:"green",shape:"dot",text:"node-red:common.status.connected"});
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}
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else {
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this.status({fill:"red",shape:"ring",text:"node-red:common.status.disconnected"},true);
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}
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var node = this;
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this.client.on("end", function() {
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node.status({fill:"red",shape:"ring",text:"node-red:common.status.disconnected"});
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});
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this.client.on("connect", function() {
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node.status({fill:"green",shape:"dot",text:"node-red:common.status.connected"});
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});
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this.on("input", function(msg) {
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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,RED.util.ensureString(msg.payload));
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}
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else if (this.structtype == "hash") {
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if (typeof msg.payload == "object") {
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this.client.hmset(k,msg.payload);
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}
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else {
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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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}
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else {
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this.warn(RED._("redisout.errors.invalidpayload"));
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}
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}
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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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}
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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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}
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else {
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this.warn(RED._("redisout.errors.nokey"));
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}
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});
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this.on("close", function() {
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redisConnectionPool.close(node.client);
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});
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}
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RED.nodes.registerType("redis out",RedisOutNode);
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}
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