java连接couchbase的memcache

没有参考代码的时候重新写还是有点累的，这是重温了，第一次写的时候参考了别的一些乱七八糟的代码，虽然不是和这个一样的，不过在不懂的情况下还是很快写出来了，反而是这次光是找需要哪些jar都搞了半天，最后发现extern的用一个jar就够了，addresses和auth之前也是糊里糊涂的，这次总算搞清楚了

maven引入

<dependency>
    <groupId>com.googlecode.xmemcached</groupId>
    <artifactId>xmemcached</artifactId>
    <version>1.4.3</version>
 </dependency>

先按照在前面的一篇《记一次couchbase（memcached）安装以及使用》的步骤安装好，类型选择couchbase就行了，
测试代码如下：

package Test.test;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import net.rubyeye.xmemcached.MemcachedClient;
import net.rubyeye.xmemcached.MemcachedClientBuilder;
import net.rubyeye.xmemcached.XMemcachedClientBuilder;
import net.rubyeye.xmemcached.auth.AuthInfo;
import net.rubyeye.xmemcached.command.BinaryCommandFactory;
import net.rubyeye.xmemcached.exception.MemcachedException;
import net.rubyeye.xmemcached.utils.AddrUtil;
public class App
{
    public static void main( String[] args )
    {
        try {
            MemcachedClientBuilder builder = new XMemcachedClientBuilder(AddrUtil.getAddresses("192.168.92.128:11211")) ;
            builder.addAuthInfo(AddrUtil.getOneAddress("192.168.92.128:11211"), AuthInfo.plain("azul", "xxxx"));
            builder.setCommandFactory(new BinaryCommandFactory());
            builder.setFailureMode(true);
            builder.setConnectionPoolSize(10);
            MemcachedClient client = builder.build();
            client.set("lwk", 0, "hello");
            String value = client.get("key");
            System.out.println(value);
            client.shutdown();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (TimeoutException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (MemcachedException e) {
            e.printStackTrace();
        }
        System.out.println( "end..." );
    }
}

执行结果：

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
hello
end...

管理界面上可以看到：

它是密文存储的

如果不用sasl验证的话先把服务器上的验证去掉然后这样写

package Test.test;

import net.spy.memcached.AddrUtil;
import net.spy.memcached.MemcachedClient;

public class App
{
    public static void main( String[] args )
    {
        try {
            MemcachedClient client = new MemcachedClient(AddrUtil.getAddresses("192.168.92.128:11211"));
            client.set("lwk", 0, "hello");
            Object value = client.get("lwk");
            System.out.println(value);
            client.shutdown();
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println( "end..." );
    }
}

结果：

2015-03-01 23:26:38.268 INFO net.spy.memcached.MemcachedConnection:  Added {QA sa=/192.168.92.128:11202, #Rops=0, #Wops=0, #iq=0, topRop=null, topWop=null, toWrite=0, interested=0} to connect queue
2015-03-01 23:26:38.271 INFO net.spy.memcached.MemcachedConnection:  Connection state changed for sun.nio.ch.SelectionKeyImpl@be7667
2015-03-01 23:26:38.276 WARN net.spy.memcached.MemcachedConnection:  Could not redistribute to another node, retrying primary node for lwk.
hello
end...
2015-03-01 23:26:38.284 INFO net.spy.memcached.MemcachedConnection:  Shut down memcached client

这里是通过java client访问，一会儿用命令行试一下。

服务器上起了一个memcached服务之后，

如果是auth-less的，可以用telnet客户端直接去连接

C:\Users\Administrator>telnet 192.168.92.128 11200

输入stats，得到一系列的服务器上的信息

stats
STAT delete_misses 0
STAT rejected_conns 0
STAT connection_structures 5000
STAT reclaimed 0
STAT limit_maxbytes 67108864
STAT decr_hits 0
STAT curr_conns_on_port_11209 12
STAT curr_conns_on_port_11210 5
STAT curr_connections 19
STAT rusage_system 17.695309
STAT cas_misses 0
STAT bytes 64
STAT get_misses 1
STAT bytes_read 380638
STAT get_hits 4
STAT decr_misses 0
STAT rusage_user 1093.362783
STAT bucket_conns 9
STAT cmd_flush 0
STAT tcp_nodelay enable
STAT uptime 25500
STAT max_conns_on_port_11209 1000
STAT total_items 2
STAT incr_hits 0
STAT max_conns_on_port_11210 9000
STAT time 1425174744
STAT daemon_connections 4
STAT pointer_size 64
STAT version 2.1.0r
STAT engine_maxbytes 104857600
STAT evictions 0
STAT total_connections 58
STAT curr_items 1
STAT delete_hits 0
STAT cas_hits 0
STAT auth_errors 0
STAT threads 4
STAT pid 1465
STAT auth_cmds 4
STAT cas_badval 0
STAT cmd_set 2
STAT bucket_active_conns 1
STAT cmd_get 5
STAT conn_yields 0
STAT listen_disabled_num 0
STAT bytes_written 8718605
STAT libevent 2.0.11-stable
STAT accepting_conns 1
STAT incr_misses 0
END

现在可以add、set、get