Memcached的 flush_all 命令用于删除memcached服务器中的所有数据(键值对)。它接受一个叫做time可选参数,表示这个时间后的所有memcached数据会被清除。
memcached 的 flush_all 命令的基本语法如下所示:
flush_all [time] [noreply]
上面的命令总是返回OK
在下面给出的例子中,我们存储一些数据到 memcached 服务器,然后清除所有数据。
set yiibai 0 900 9 memcached STORED get yiibai VALUE yiibai 0 9 memcached END flush_all OK get yiibai END
要清除memcached服务器的数据,则需要使用memcached的flush 方法。
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()); } }
当上述程序编译和运行,它提供了以下的输出:
Connection to server successfully set status:true Get from Cache:5 Increment value:7 Decrement value:6 Get from Cache:6 Clear data:true