Memcached的delete命令用於刪除memcached伺服器現有的鍵。
memcached delete命令的基本語法如下所示:
delete key
如果鍵成功刪除,則返回DELETED,如果key沒有找到則返回NOT_FOUND,否則返回ERROR。
set yiibai 0 900 9 memcached STORED get yiibai VALUE yiibai 0 9 memcached END delete yiibai DELETED get yiibai END delete yiibai NOT_FOUND
在上面的例子中,我們已經使用yiibai作為鍵,並儲存在memcached其900秒後失效,之後刪除所儲存的鍵。
要從memcached伺服器中刪除資料,需要使用memcached的delete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("yiibai", 900, "memcached").done); //Get value from cache System.out.println("Get from Cache:"+mcc.get("yiibai")); //delete value from cache System.out.println("Delete from Cache:"+mcc.delete("yiibai").isDone()); //check whether value exists or not System.out.println("Get from Cache:"+mcc.get("yiibai")); } }
當上述程式編譯和執行,它提供了以下的輸出:
Connection to server successfully set status:true Get from Cache:memcached Delete from Cache:true Get from Cache:null