Posted on 2009-12-24 01:51
dennis 閱讀(4879)
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my open-source
昨天收到一個(gè)xmc的issue報(bào)告，大概的意思是將
Xmemcached與spring 2.5集成沒(méi)有任何問(wèn)題，但是將spring升級(jí)到3.0就會(huì)拋出一個(gè)異常，并且spring容器無(wú)法正常啟動(dòng)，異常信息類似“
Couldn't find a destroy method named 'shutdown' on bean XMemcachedClientFactoryBean”。更詳細(xì)的情況可以看這里，這是這位朋友分析的結(jié)果，簡(jiǎn)單來(lái)說(shuō)就是spring 3.0對(duì)于查找destroy method為空的情況處理不同了，過(guò)去是打個(gè)日志，現(xiàn)在是拋出一個(gè)異常。
問(wèn)題說(shuō)完，這里主要是介紹下這個(gè)問(wèn)題的解決方式，事實(shí)上Xmemcached有一個(gè)沒(méi)有被文檔化的Spring配置方式，沒(méi)有寫入文檔的主要考慮是以為wiki介紹的第一種方式已經(jīng)足夠，而builder的方式相對(duì)繁瑣一些。通過(guò)XmemcachedClientBuilder的這個(gè)factory bean的factory-method，也就是build方法來(lái)構(gòu)建MemcachedClient，這就可以繞開spring 3.0的這個(gè)問(wèn)題。一個(gè)示范配置如下：
<bean name="memcachedClientBuilder" class="net.rubyeye.xmemcached.XMemcachedClientBuilder">
<constructor-arg>
<list>
<bean class="java.net.InetSocketAddress">
<constructor-arg>
<value>localhost</value>
</constructor-arg>
<constructor-arg>
<value>12000</value>
</constructor-arg>
</bean>
</list>
</constructor-arg>
</bean>
<bean name="memcachedClient" factory-bean="memcachedClientBuilder"
factory-method="build" destroy-method="shutdown" />
memcachedClientBuilder作為一個(gè)factory-bean，接受一個(gè)InetSocketAddress列表作為構(gòu)造函數(shù)傳入，最后MemcachedClient就可以通過(guò)factory-method——也就是build方法創(chuàng)建了。
多個(gè)節(jié)點(diǎn)情況下，可能你想設(shè)置權(quán)重，那么傳入memcachedClientBuilder的第二個(gè)構(gòu)造函數(shù)
參數(shù)權(quán)重?cái)?shù)組即可：
<bean name="memcachedClientBuilder" class="net.rubyeye.xmemcached.XMemcachedClientBuilder">
<constructor-arg>
<list>
<bean class="java.net.InetSocketAddress">
<constructor-arg>
<value>localhost</value>
</constructor-arg>
<constructor-arg>
<value>12000</value>
</constructor-arg>
</bean>
<bean class="java.net.InetSocketAddress">
<constructor-arg>
<value>localhost</value>
</constructor-arg>
<constructor-arg>
<value>12001</value>
</constructor-arg>
</bean>
</list>
</constructor-arg>
<constructor-arg>
<list>
<value>1</value>
<value>2</value>
</list>
</constructor-arg>
</bean>
<bean name="memcachedClient" factory-bean="memcachedClientBuilder"
factory-method="build" destroy-method="shutdown" />
上面的例子將localhost:12000的權(quán)重設(shè)置為1，而localhost:12001的權(quán)重設(shè)置為2。除了這些配置外，XmemcachedClientBuilder還有其他選項(xiàng)，如配置一致性哈希算法、連接池等，完整的配置例子如下：
<bean name="memcachedClientBuilder" class="net.rubyeye.xmemcached.XMemcachedClientBuilder">
<!-- XMemcachedClientBuilder have two arguments.First is server list,and second is weights array. -->
<constructor-arg>
<list>
<bean class="java.net.InetSocketAddress">
<constructor-arg>
<value>localhost</value>
</constructor-arg>
<constructor-arg>
<value>12000</value>
</constructor-arg>
</bean>
<bean class="java.net.InetSocketAddress">
<constructor-arg>
<value>localhost</value>
</constructor-arg>
<constructor-arg>
<value>12001</value>
</constructor-arg>
</bean>
</list>
</constructor-arg>
<constructor-arg>
<list>
<value>1</value>
<value>2</value>
</list>
</constructor-arg>
<property name="connectionPoolSize" value="2"></property>
<property name="commandFactory">
<bean class="net.rubyeye.xmemcached.command.TextCommandFactory"></bean>
</property>
<property name="sessionLocator">
<bean class="net.rubyeye.xmemcached.impl.KetamaMemcachedSessionLocator"></bean>
</property>
<property name="transcoder">
<bean class="net.rubyeye.xmemcached.transcoders.SerializingTranscoder" />
</property>
</bean>
<!-- Use factory bean to build memcached client -->
<bean name="memcachedClient" factory-bean="memcachedClientBuilder"
factory-method="build" destroy-method="shutdown"/>