[CCSDK-28] populated the seed code for dgbuilder

[ccsdk/distribution.git] / dgbuilder / core_nodes / storage / 65-redisout.js

diff --git a/dgbuilder/core_nodes/storage/65-redisout.js b/dgbuilder/core_nodes/storage/65-redisout.js
new file mode 100644 (file)
index 0000000..907e2a5
--- /dev/null
+++ b/dgbuilder/core_nodes/storage/65-redisout.js
@@ -0,0 +1,107 @@
+/**
+ * Copyright 2013 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.
+ **/
+
+module.exports = function(RED) {
+    "use strict";
+    var util = require("util");
+    var redis = require("redis");
+
+    var hashFieldRE = /^([^=]+)=(.*)$/;
+
+    var redisConnectionPool = function() {
+        var connections = {};
+        var obj = {
+            get: function(host,port) {
+                var id = host+":"+port;
+                if (!connections[id]) {
+                    connections[id] = redis.createClient(port,host);
+                    connections[id].on("error",function(err) {
+                            util.log("[redis] "+err);
+                    });
+                    connections[id].on("connect",function() {
+                            util.log("[redis] connected to "+host+":"+port);
+                    });
+                    connections[id]._id = id;
+                    connections[id]._nodeCount = 0;
+                }
+                connections[id]._nodeCount += 1;
+                return connections[id];
+            },
+            close: function(connection) {
+                connection._nodeCount -= 1;
+                if (connection._nodeCount === 0) {
+                    if (connection) {
+                        clearTimeout(connection.retry_timer);
+                        connection.end();
+                    }
+                    delete connections[connection._id];
+                }
+            }
+        };
+        return obj;
+    }();
+
+
+    function RedisOutNode(n) {
+        RED.nodes.createNode(this,n);
+        this.port = n.port||"6379";
+        this.hostname = n.hostname||"127.0.0.1";
+        this.key = n.key;
+        this.structtype = n.structtype;
+
+        this.client = redisConnectionPool.get(this.hostname,this.port);
+
+        if (this.client.connected) {
+            this.status({fill:"green",shape:"dot",text:"connected"});
+        } else {
+            this.status({fill:"red",shape:"ring",text:"disconnected"},true);
+        }
+
+        var node = this;
+        this.client.on("end", function() {
+            node.status({fill:"red",shape:"ring",text:"disconnected"});
+        });
+        this.client.on("connect", function() {
+            node.status({fill:"green",shape:"dot",text:"connected"});
+        });
+
+        this.on("input", function(msg) {
+            var k = this.key || msg.topic;
+            if (k) {
+                if (this.structtype == "string") {
+                    this.client.set(k,RED.util.ensureString(msg.payload));
+                } else if (this.structtype == "hash") {
+                    var r = hashFieldRE.exec(msg.payload);
+                    if (r) {
+                        this.client.hset(k,r[1],r[2]);
+                    } else {
+                        this.warn("Invalid payload for redis hash");
+                    }
+                } else if (this.structtype == "set") {
+                    this.client.sadd(k,msg.payload);
+                } else if (this.structtype == "list") {
+                    this.client.rpush(k,msg.payload);
+                }
+            } else {
+                this.warn("No key or topic set");
+            }
+        });
+        this.on("close", function() {
+            redisConnectionPool.close(node.client);
+        });
+    }
+    RED.nodes.registerType("redis out",RedisOutNode);
+}