// Command redis is a basic app that connects to a managed Redis instance.packagemainimport("fmt""log""net/http""os""github.com/gomodule/redigo/redis")varredisPool*redis.PoolfuncincrementHandler(whttp.ResponseWriter,r*http.Request){conn:=redisPool.Get()deferconn.Close()counter,err:=redis.Int(conn.Do("INCR","visits"))iferr!=nil{http.Error(w,"Error incrementing visitor counter",http.StatusInternalServerError)return}fmt.Fprintf(w,"Visitor number: %d",counter)}funcmain(){redisHost:=os.Getenv("REDISHOST")redisPort:=os.Getenv("REDISPORT")redisAddr:=fmt.Sprintf("%s:%s",redisHost,redisPort)constmaxConnections=10redisPool=&redis.Pool{MaxIdle:maxConnections,Dial:func()(redis.Conn,error){returnredis.Dial("tcp",redisAddr)},}http.HandleFunc("/",incrementHandler)port:=os.Getenv("PORT")ifport==""{port="8080"}log.Printf("Listening on port %s",port)iferr:=http.ListenAndServe(":"+port,nil);err!=nil{log.Fatal(err)}}

<dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>5.1.0</version></dependency>

packagecom.example.redis;importjava.io.IOException;importjava.util.Properties;importjavax.servlet.ServletContextEvent;importjavax.servlet.ServletContextListener;importjavax.servlet.annotation.WebListener;importredis.clients.jedis.JedisPool;importredis.clients.jedis.JedisPoolConfig;@WebListenerpublicclassAppServletContextListenerimplementsServletContextListener{privatePropertiesconfig=newProperties();privateJedisPoolcreateJedisPool()throwsIOException{Stringhost;Integerport;config.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("application.properties"));host=config.getProperty("redis.host");port=Integer.valueOf(config.getProperty("redis.port","6379"));JedisPoolConfigpoolConfig=newJedisPoolConfig();// Default : 8, consider how many concurrent connections into Redis you will need under loadpoolConfig.setMaxTotal(128);returnnewJedisPool(poolConfig,host,port);}@OverridepublicvoidcontextDestroyed(ServletContextEventevent){JedisPooljedisPool=(JedisPool)event.getServletContext().getAttribute("jedisPool");if(jedisPool!=null){jedisPool.destroy();event.getServletContext().setAttribute("jedisPool",null);}}// Run this before web application is started@OverridepublicvoidcontextInitialized(ServletContextEventevent){JedisPooljedisPool=(JedisPool)event.getServletContext().getAttribute("jedisPool");if(jedisPool==null){try{jedisPool=createJedisPool();event.getServletContext().setAttribute("jedisPool",jedisPool);}catch(IOExceptione){// handle exception}}}}

packagecom.example.redis;importjava.io.IOException;importjava.net.SocketException;importjavax.servlet.annotation.WebServlet;importjavax.servlet.http.HttpServlet;importjavax.servlet.http.HttpServletRequest;importjavax.servlet.http.HttpServletResponse;importredis.clients.jedis.Jedis;importredis.clients.jedis.JedisPool;@WebServlet(name="Track visits",value="")publicclassVisitCounterServletextendsHttpServlet{@OverridepublicvoiddoGet(HttpServletRequestreq,HttpServletResponseresp)throwsIOException{try{JedisPooljedisPool=(JedisPool)req.getServletContext().getAttribute("jedisPool");if(jedisPool==null){thrownewSocketException("Error connecting to Jedis pool");}Longvisits;try(Jedisjedis=jedisPool.getResource()){visits=jedis.incr("visits");}resp.setStatus(HttpServletResponse.SC_OK);resp.getWriter().println("Visitor counter: "+String.valueOf(visits));}catch(Exceptione){resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,e.getMessage());}}}

{"name":"memorystore-redis","description":"An example of using Memorystore(Redis) with Node.js","version":"0.0.1","private":true,"license":"Apache Version 2.0","author":"Google Inc.","engines":{"node":">=16.0.0"},"dependencies":{"redis":"^4.0.0"}}

'use strict';consthttp=require('http');constredis=require('redis');constREDISHOST=process.env.REDISHOST||'localhost';constREDISPORT=process.env.REDISPORT||6379;constclient=redis.createClient({url:`redis://${REDISHOST}:${REDISPORT}`,});client.on('error',err=>console.error('ERR:REDIS:',err));client.connect().then(()=>{console.log('Connected to Redis');http.createServer(async(req,res)=>{try{constreply=awaitclient.incr('visits');res.writeHead(200,{'Content-Type':'text/plain'});res.end(`Visitor number:${reply}\n`);}catch(err){console.error(err);res.statusCode=500;res.end(err.message);}}).listen(8080,()=>{console.log('Server listening on port 8080');});}).catch(err=>{console.error('Failed to connect to Redis:',err);throwerr;});

Flask==3.0.3gunicorn==23.0.0redis==6.0.0Werkzeug==3.0.3

importloggingimportosfromflaskimportFlaskimportredisapp=Flask(__name__)redis_host=os.environ.get("REDISHOST","localhost")redis_port=int(os.environ.get("REDISPORT",6379))redis_client=redis.StrictRedis(host=redis_host,port=redis_port)@app.route("/")defindex():value=redis_client.incr("counter",1)returnf"Visitor number:{value}"@app.errorhandler(500)defserver_error(e):logging.exception("An error occurred during a request.")return("""    An internal error occurred: <pre>{}</pre>    See logs for full stacktrace.    """.format(e),500,)if__name__=="__main__":# This is used when running locally. Gunicorn is used to run the# application on Google App Engine and Cloud Run.# See entrypoint in app.yaml or Dockerfile.app.run(host="127.0.0.1",port=8080,debug=True)