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