memcached delete command is used to delete an existing key from the memcached server.

syntax

the basic syntax of memcached delete command is as shown below −

delete key

if the key is successfully deleted, then it returns deleted. if the key is not found, then it returns not_found, otherwise it returns error.

example

in this example, we use tutorialspoint as a key and store memcached in it with an expiration time of 900 seconds. after this, it deletes the stored key.

set tutorialspoint 0 900 9
memcached
stored
get tutorialspoint
value tutorialspoint 0 9
memcached
end
delete tutorialspoint
deleted
get tutorialspoint
end
delete tutorialspoint
not_found

delete data using java application

to delete data from a memcached server, you need to use the memcached delete method.

example

import net.spy.memcached.memcachedclient;
public class memcachedjava {
   public static void main(string[] args) {
      
      // connecting to memcached server on localhost
      memcachedclient mcc = new memcachedclient(new
      inetsocketaddress("127.0.0.1", 11211));
      system.out.println("connection to server successful");
      system.out.println("set status:"+mcc.set("tutorialspoint", 900, "memcached").done);
      
      // get value from cache
      system.out.println("get from cache:"+mcc.get("tutorialspoint"));
      
      // delete value from cache
      system.out.println("delete from cache:"+mcc.delete("tutorialspoint").isdone());
      
      // check whether value exists or not
      system.out.println("get from cache:"+mcc.get("tutorialspoint"));
   }
}

output

on compiling and executing the program, you get to see the following output −

connection to server successful
set status:true
get from cache:memcached
delete from cache:true
get from cache:null