在grails项目中配置Hazelcast

Question

我有一个grails项目，我想在其中配置Hazelcast。但是我做不到。我已经下载了hazelcast并添加到lib文件夹。然后我尝试在资源文件

中初始化

hazelcastConfigurer(MethodInvokingFactoryBean){
        targetClass = "com.hazelcast.core.Hazelcast"
        targetMethod = "init"
        Config hazelcastConfig = new Config("hazelcast.xml")
        arguments = hazelcastConfig
}

它只是不编译并抛出错误

[2014-06-04 22:08:25,293] - context.GrailsContextLoader Error initializing the a
pplication: Error creating bean with name 'hazelcastConfigurer': Invocation of i
nit method failed; nested exception is java.lang.NoSuchMethodException: com.haze
lcast.core.Hazelcast.init(com.hazelcast.config.Config)
org.springframework.beans.factory.BeanCreationException: Error creating bean wit
h name 'hazelcastConfigurer': Invocation of init method failed; nested exception
 is java.lang.NoSuchMethodException: com.hazelcast.core.Hazelcast.init(com.hazel
cast.config.Config)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.
java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:615)
        at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NoSuchMethodException: com.hazelcast.core.Hazelcast.init(co
m.hazelcast.config.Config)
        at java.lang.Class.getMethod(Class.java:1624)
        ... 5 more

是否有任何博客或网站可以帮助我在grails项目中配置?

Answer 1

下面是我如何在Grails 2.1.2应用程序中配置Hazelcast 3.2以使用Spring缓存注释:

BuildConfig.groovy

dependencies {
    ...
    compile "com.hazelcast:hazelcast:3.2"
    compile "com.hazelcast:hazelcast-spring:3.2"
}

Hazelcast实例配置，src/java/spring/hazelcast.xml:

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:hz="http://www.hazelcast.com/schema/spring"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
                http://www.springframework.org/schema/context
                http://www.springframework.org/schema/context/spring-context-3.1.xsd
                http://www.hazelcast.com/schema/spring
                http://www.hazelcast.com/schema/spring/hazelcast-spring-3.2.xsd">
    <hz:hazelcast id="hazelcastInstance">
        <hz:config>
            <hz:map name="myCache"
                    backup-count="0"
                    in-memory-format="OBJECT"
                    >
            </hz:map>
        </hz:config>
    </hz:hazelcast>
</beans>

启用Spring缓存注释，src/java/spring/spring-cache.xml:

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:cache="http://www.springframework.org/schema/cache"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">
    <cache:annotation-driven/>
</beans>

将它们连接在一起- Spring缓存注释使用的缓存管理器bean配置为Hazelcast实例bean, grails-app/conf/spring/resources.groovy:

beans = {          
        importBeans('classpath:/spring/spring-cache.xml')              
        importBeans('classpath:/spring/hazelcast.xml')
        cacheManager(com.hazelcast.spring.cache.HazelcastCacheManager, ref('hazelcastInstance'))                       
}

现在您可以使用Spring缓存注释，如@Cacheable和@CacheEvict与Hazelcast缓存:

    @Cacheable(value = 'myCache')
    SomethingDto getSomethingDto(Long id) {
        SomethingDto dto = convertToSomethingDto(Something.get(id))
        return dto
    }

我通常将域对象转换为dto，因为如果将普通域对象存储到缓存中，如果惰性获取它的某些属性可能会导致问题。

一些笔记:

• 我把Spring XML文件放到src/java中，因为在grails-app/conf/spring中它们没有在生产中找到，参见从grails应用程序中的自定义groovy文件加载Spring bean
• 可以在resources.groovy中使用环境块实现每个环境的Hazelcast配置。我使用了它，但为了简单起见，我没有在这里发布。

Answer 2

如果您使用的是Hazelcast 3.0版本，它应该是targetMethod = "newHazelcastInstance"而不是targetMethod = "init"。