Memcached删除/Delete数据

Memcached的delete命令用于删除memcached服务器现有的键。

语法

memcached delete命令的基本语法如下所示:

delete key

如果键成功删除,则返回DELETED,如果key没有找到则返回NOT_FOUND,否则返回ERROR。

示例

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,我们已经使用yiibai作为键,并存储在memcached其900秒后失效,之后删除所存储的键。

使用Java应用程序删除数据

要从memcached服务器中删除数据,需要使用memcached的delete方法。

示例

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"));
   }
}

输出

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:memcached
Delete from Cache:true
Get from Cache:null

        原文作者:Memcached教程
        原文地址: https://www.yiibai.com/memcached/memcached_delete_key.html
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