Memcached flush_all command is used to delete all data (key-value pairs) from the Memcached server. It accepts an optional parameter called time that sets a time after which the Memcached data is to be cleared.
Syntax
The basic syntax of Memcached flush_all command is as shown below −
flush_all [time] [noreply]
The above command always returns OK.
Example
In the following example, we store some data into the Memcached server and then clear all the data.
set tutorialspoint 0 900 9 memcached STORED get tutorialspoint VALUE tutorialspoint 0 9 memcached END flush_all OK get tutorialspoint END
Clear Data Using Java Application
To clear data from a Memcached server, you need to use the Memcached flush 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 sucessfully");
System.out.println("set status:"+mcc.set("count", 900, "5").isDone());
// Get value from cache
System.out.println("Get from Cache:"+mcc.get("count"));
// now increase the stored value
System.out.println("Increment value:"+mcc.incr("count", 2));
// now decrease the stored value
System.out.println("Decrement value:"+mcc.decr("count", 1));
// now get the final stored value
System.out.println("Get from Cache:"+mcc.get("count"));
// now clear all this data
System.out.println("Clear data:"+mcc.flush().isDone());
}
}
Output
On compiling and executing the program, you get to see the following output −
Connection to server successfully set status:true Get from Cache:5 Increment value:7 Decrement value:6 Get from Cache:6 Clear data:true