add finish of node and python examples

module5_redis_python_node/node/Finish/cached_query.js

@@ -0,0 +1,63 @@
+var redis = require("redis");
+var client = redis.createClient();
+var MongoClient = require('mongodb').MongoClient
+var url = 'mongodb://127.0.0.1:27017/test';
+var assert = require('assert');
+MongoClient.connect(url, function(err, db) {
+
+  //ensure we've connected
+  assert.equal(null, err);
+
+  var crimes = db.collection('crimes');
+
+  //start timer
+  console.time('query_time');
+
+  client.get('longquery_result', function(err,count){
+
+    if(err){
+      return console.error(err);
+    }
+
+    if(!count){ //cache miss!
+      crimes.find({"Primary Type": "ROBBERY"}, function(err, data){
+
+        if(err){
+          return console.error(err);
+        }
+
+        data.count(function(err, count){
+          console.log('Total ROBBERY Crimes: ' + count);
+          console.timeEnd('query_time');
+
+          //cache into redis
+          client.set('longquery_result', count, function(err){
+
+            if(err){
+              return console.error(err);
+            }
+
+            //expire query in 20 seconds
+            client.expire('longquery_result', 20);
+
+            console.log('sucessfully cached query');
+            //close the database connection
+            return db.close();
+
+          });
+
+        });
+
+
+      });
+
+    }
+    else{ // cache hit!!
+      console.log('Total ROBBERY Crimes: ' + count);
+      console.timeEnd('query_time');
+    }
+  });
+
+
+
+});

module5_redis_python_node/node/Finish/count_server.js

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+var redis = require("redis");
+var client = redis.createClient(6379, "someredis.redis.cache.windows.net", {auth_pass: 'PCeGeDZVrSQupyhx0Ce+oni6AnnQnjLsskJ6Rlo6Chk=', return_buffers: true});
+var http = require('http');
+http.createServer(function (req, res) {
+  client.pfadd('clientips', req.connection.remoteAddress, function(err){
+  	if(err){
+  	  return res.writeHead(500, {'Content-Type': 'text/plain'});
+  	  res.end('Error talking to redis ' + err + '\n');
+  	}
+
+  	client.pfcount('clientips', function(err, count){
+  		res.writeHead(500, {'Content-Type': 'text/plain'});
+  		return res.end('Hello ' + req.connection.remoteAddress + '\n about ' + count + ' unique connections have visited this site!');
+  	});
+  });
+
+
+}).listen(process.env.PORT || 1337, '127.0.0.1');
+console.log('Server running at http://127.0.0.1:' + (process.env.PORT || 1337));

module5_redis_python_node/node/Finish/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "redis-node",
+  "version": "1.0.0",
+  "description": "simple redis example",
+  "main": "app.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node count_server.js"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "mongodb": "^1.4.33",
+    "redis": "^0.12.1"
+  }
+}

module5_redis_python_node/node/Finish/query.js

@@ -0,0 +1,25 @@
+var MongoClient = require('mongodb').MongoClient
+var url = 'mongodb://127.0.0.1:27017/test';
+var assert = require('assert');
+
+MongoClient.connect(url, function(err, db) {
+
+  //ensure we've connected
+  assert.equal(null, err);
+
+  var crimes = db.collection('crimes');
+  //start timer
+  console.time('query_time');
+
+    crimes.find({"Primary Type": "ROBBERY"}, function(err, data){
+
+        if(err){
+          return console.error(err);
+        }
+
+        data.count(function(err, count){
+          console.log('Total ROBBERY Crimes: ' + count);
+          return console.timeEnd('query_time');
+        });
+    });
+});

module5_redis_python_node/python/End/datastructures.py

@@ -0,0 +1,16 @@
+import redis
+r = redis.StrictRedis(host="localhost", port=6379, db=0)
+r.hset("person:0", "first_name", "Rami")
+r.hset("person:0", "last_name", "Edouard")
+# now print the hset
+print r.hgetall("person:0")
+r.hmset("person:1", {"first_name":"Rami", "last_name":"Edouard", "location":"CANADA"})
+print r.hgetall("person:1")
+
+# Sets
+print "Creating a set of countries in redis..."
+r.sadd("countries", "USA")
+r.sadd("countries", "Canada")
+r.sadd("countries", "Mexico")
+print "Getting contry set from redis..."
+print r.smembers("countries")