java - Spring许多mamcached实现

Question

我需要在我的应用程序中使用一些 memcached 服务器。

到目前为止，我只使用一种配置:

<bean id="memcachedClient" class="net.spy.memcached.spring.MemcachedClientFactoryBean" scope="singleton">
    <property name="servers" value="${app.memcached.url}"/>
    <property name="protocol" value="BINARY"/>
    <property name="transcoder">
        <bean class="net.spy.memcached.transcoders.SerializingTranscoder">
            <property name="compressionThreshold" value="1024"/>
        </bean>
    </property>
    <property name="opTimeout" value="1000"/>
    <property name="timeoutExceptionThreshold" value="1998"/>
    <property name="locatorType" value="CONSISTENT"/>
    <property name="failureMode" value="Redistribute"/>
    <property name="useNagleAlgorithm" value="false"/>
</bean>

当我想使用两台服务器时，只需添加:

<bean id="memcachedClient" class="net.spy.memcached.spring.MemcachedClientFactoryBean" scope="singleton">
    <property name="servers" value="${app.memcached.url}"/>
    <property name="protocol" value="BINARY"/>
    <property name="transcoder">
        <bean class="net.spy.memcached.transcoders.SerializingTranscoder">
            <property name="compressionThreshold" value="1024"/>
        </bean>
    </property>
    <property name="opTimeout" value="1000"/>
    <property name="timeoutExceptionThreshold" value="1998"/>
    <property name="locatorType" value="CONSISTENT"/>
    <property name="failureMode" value="Redistribute"/>
    <property name="useNagleAlgorithm" value="false"/>
</bean>

<bean id="memcachedAs" class="net.spy.memcached.spring.MemcachedClientFactoryBean" scope="singleton">
    <property name="servers" value="${app.memcached.url.as}"/>
    <property name="protocol" value="BINARY"/>
    <property name="transcoder">
        <bean class="net.spy.memcached.transcoders.SerializingTranscoder">
            <property name="compressionThreshold" value="1024"/>
        </bean>
    </property>
    <property name="opTimeout" value="1000"/>
    <property name="timeoutExceptionThreshold" value="1998"/>
    <property name="locatorType" value="CONSISTENT"/>
    <property name="failureMode" value="Redistribute"/>
    <property name="useNagleAlgorithm" value="false"/>
</bean>

但后来我收到错误:

is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [net.spy.memcached.MemcachedClient] is defined: expected single matching bean but found 

你能帮我，如何实现许多配置吗？

Answer 1

我假设你有一个像这样的注入(inject)目标

@Autowired
private MemcachedClient client;

Spring 将尝试根据 bean 的类型来解析它。但是您的上下文中有两个该类型的 bean，因此 Spring 不知道选择哪一个。相反，您可以通过 ID 注入(inject) bean

@Resource(name="memcachedAs")
private MemcachedClient client;

甚至

@Autowired 
@Qualifier("memcachedAs")
private MemcachedClient client;