O melhor tutorial Conexão Java serviço Memcached em 2024. Neste tutorial você pode aprender Conexão Java serviço Memcached

Conexão Java serviço Memcached

programa Java para conectar usando Memcached, você precisa adicionar pacote jar Memcached no seu classpath.

Alimentado pacote jar Download: Spymemcached-2.10.3.jar .

Google Code pacote jar Download: Spymemcached-2.10.3.jar

O procedimento a seguir assume que o host de serviço como 127.0.0.1, 11211 porta memcached.

exemplos de conexão

Java Memcached conexão

import net.spy.memcached.MemcachedClient;
import java.net.*;


public class MemcachedJava {
   public static void main(String[] args) {
      try{
         // 本地连接 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");
         
         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex){
         System.out.println( ex.getMessage() );
      }
   }
}

O programa que usamos InetSocketAddress endereço IP de conexão da porta 127.0.0.1 11211 do serviço memcached.

Implementação do código acima, se a conexão for saídas bem-sucedidas as seguintes informações:

Connection to server successful.

definir Passo a passo

Os seguintes dados são armazenados usando java.util.concurrent.Future

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
         // 连接本地的 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");
      
         // 存储数据
         Future fo = mcc.set("w3big", 900, "Free Education");
      
         // 查看存储状态
         System.out.println("set status:" + fo.get());
         
         // 输出值
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex){
         System.out.println( ex.getMessage() );
      }
   }
}

A execução do programa, a saída é:

Connection to server successful.
set status:true
w3big value in cache - Free Education

adicionar Passo a passo

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // 连接本地的 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // 添加数据
         Future fo = mcc.set("w3big", 900, "Free Education");

         // 打印状态
         System.out.println("set status:" + fo.get());

         // 输出
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 添加
         Future fo = mcc.add("w3big", 900, "memcached");

         // 打印状态
         System.out.println("add status:" + fo.get());

         // 添加新key
         fo = mcc.add("codingground", 900, "All Free Compilers");

         // 打印状态
         System.out.println("add status:" + fo.get());
         
         // 输出
         System.out.println("codingground value in cache - " + mcc.get("codingground"));

         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex){
         System.out.println(ex.getMessage());
      }
   }
}

substituir Passo a passo

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try {
         //连接本地的 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // 添加第一个 key=》value 对
         Future fo = mcc.set("w3big", 900, "Free Education");

         // 输出执行 add 方法后的状态
         System.out.println("add status:" + fo.get());

         // 获取键对应的值
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 添加新的 key
         fo = mcc.replace("w3big", 900, "Largest Tutorials' Library");

         // 输出执行 set 方法后的状态
         System.out.println("replace status:" + fo.get());

         // 获取键对应的值
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex){
         System.out.println( ex.getMessage() );
      }
   }
}

anexar exemplo de operação

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // 连接本地的 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // 添加数据
         Future fo = mcc.set("w3big", 900, "Free Education");

         // 输出执行 set 方法后的状态
         System.out.println("set status:" + fo.get());

         // 获取键对应的值
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 对存在的key进行数据添加操作
         Future fo = mcc.append("w3big", 900, " for All");

         // 输出执行 set 方法后的状态
         System.out.println("append status:" + fo.get());
         
         // 获取键对应的值
         System.out.println("w3big value in cache - " + mcc.get("codingground"));

         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex)
         System.out.println(ex.getMessage());
   }
}

preceder Passo a passo

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // 连接本地的 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // 添加数据
         Future fo = mcc.set("w3big", 900, "Education for All");

         // 输出执行 set 方法后的状态
         System.out.println("set status:" + fo.get());

         // 获取键对应的值
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 对存在的key进行数据添加操作
         Future fo = mcc.prepend("w3big", 900, "Free ");

         // 输出执行 set 方法后的状态
         System.out.println("prepend status:" + fo.get());
         
         // 获取键对应的值
         System.out.println("w3big value in cache - " + mcc.get("codingground"));

         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex)
         System.out.println(ex.getMessage());
   }
}

CAS Passo a passo

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.CASValue;
import net.spy.memcached.CASResponse;
import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // 连接本地的 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // 添加数据
         Future fo = mcc.set("w3big", 900, "Free Education");

         // 输出执行 set 方法后的状态
         System.out.println("set status:" + fo.get());
            
         // 使用 get 方法获取数据
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 通过 gets 方法获取 CAS token（令牌）
         CASValue casValue = mcc.gets("w3big");

         // 输出 CAS token（令牌） 值
         System.out.println("CAS token - " + casValue);

         // 尝试使用cas方法来更新数据
         CASResponse casresp = mcc.cas("w3big", casValue.getCas(), 900, "Largest Tutorials-Library");
         
         // 输出 CAS 响应信息
         System.out.println("CAS Response - " + casresp);

         // 输出值
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex)
         System.out.println(ex.getMessage());
   }
}

obter Passo a passo

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // 连接本地的 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // 添加数据
         Future fo = mcc.set("w3big", 900, "Free Education");

         // 输出执行 set 方法后的状态
         System.out.println("set status:" + fo.get());

         // 使用 get 方法获取数据
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex)
         System.out.println(ex.getMessage());
   }
}

recebe exemplo operacional, CAS

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.CASValue;
import net.spy.memcached.CASResponse;
import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // 连接本地的 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // 添加数据
         Future fo = mcc.set("w3big", 900, "Free Education");

         // 输出执行 set 方法后的状态
         System.out.println("set status:" + fo.get());
            
         // 从缓存中获取键为 w3big 的值
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 通过 gets 方法获取 CAS token（令牌）
         CASValue casValue = mcc.gets("w3big");

         // 输出 CAS token（令牌） 值
         System.out.println("CAS value in cache - " + casValue);

         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex)
         System.out.println(ex.getMessage());
   }
}

eliminar exemplo de operação

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // 连接本地的 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // 添加数据
         Future fo = mcc.set("w3big", 900, "World's largest online tutorials library");

         // 输出执行 set 方法后的状态
         System.out.println("set status:" + fo.get());

         // 获取键对应的值
         System.out.println("w3big value in cache - " + mcc.get("w3big"));

         // 对存在的key进行数据添加操作
         Future fo = mcc.delete("w3big");

         // 输出执行 delete 方法后的状态
         System.out.println("delete status:" + fo.get());

         // 获取键对应的值
         System.out.println("w3big value in cache - " + mcc.get("codingground"));

         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex)
         System.out.println(ex.getMessage());
   }
}

Incr / Decr Passo a passo

import java.net.InetSocketAddress;
import java.util.concurrent.Future;

import net.spy.memcached.MemcachedClient;

public class MemcachedJava {
   public static void main(String[] args) {
   
      try{
   
         // 连接本地的 Memcached 服务
         MemcachedClient mcc = new MemcachedClient(new InetSocketAddress("127.0.0.1", 11211));
         System.out.println("Connection to server sucessful.");

         // 添加数字值
         Future fo = mcc.set("number", 900, "1000");

         // 输出执行 set 方法后的状态
         System.out.println("set status:" + fo.get());

         // 获取键对应的值
         System.out.println("value in cache - " + mcc.get("number"));

         // 自增并输出
         System.out.println("value in cache after increment - " + mcc.incr("number", 111));

         // 自减并输出
         System.out.println("value in cache after decrement - " + mcc.decr("number", 112));

         // 关闭连接
         mcc.shutdown();
         
      }catch(Exception ex)
         System.out.println(ex.getMessage());
   }
}