Posted on 2009-12-24 01:51
dennis 閱讀(4882)
評論(1) 編輯 收藏 所屬分類:
java 、
my open-source
昨天收到一個xmc的issue報告，大概的意思是將
Xmemcached與spring 2.5集成沒有任何問題，但是將spring升級到3.0就會拋出一個異常，并且spring容器無法正常啟動，異常信息類似“
Couldn't find a destroy method named 'shutdown' on bean XMemcachedClientFactoryBean”。更詳細的情況可以看這里，這是這位朋友分析的結果，簡單來說就是spring 3.0對于查找destroy method為空的情況處理不同了，過去是打個日志，現在是拋出一個異常。
問題說完，這里主要是介紹下這個問題的解決方式，事實上Xmemcached有一個沒有被文檔化的Spring配置方式，沒有寫入文檔的主要考慮是以為wiki介紹的第一種方式已經足夠，而builder的方式相對繁瑣一些。通過XmemcachedClientBuilder的這個factory bean的factory-method，也就是build方法來構建MemcachedClient，這就可以繞開spring 3.0的這個問題。一個示范配置如下：
<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factory-bean，接受一個InetSocketAddress列表作為構造函數傳入，最后MemcachedClient就可以通過factory-method——也就是build方法創建了。
多個節點情況下，可能你想設置權重，那么傳入memcachedClientBuilder的第二個構造函數
參數權重數組即可：
<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的權重設置為1，而localhost:12001的權重設置為2。除了這些配置外，XmemcachedClientBuilder還有其他選項，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"/>