使用GrailsDSL的另一个bean的静态方法配置JavaSpringbean

Question

在Grails2.3.7上，服务公开了几种装饰器方法：

class CacheManager {
  static ReadOnlyCache getReadOnlyCache(name)
  static ReadWriteCache getReadWriteCache(name)
}

我想用这些装饰器方法配置服务，如下所示：

beans = {
  cacheManager(CacheManager){ ... }

  pdfProcessor(PDFProcessor){
    documentCache = ref('cacheManager').getReadOnlyCache('docscache')
  }
  isbnValidator(ISBNValidator){
    cache = ref('cacheManager').getReadWriteCache('simplecache')
  }

有没有办法做到这一点

更新

多亏了Ian的suggestion，我才使这个通用解决方案发挥了作用：

@Singleton
class CacheManager {
  static ReadOnlyCache getReadOnlyCache(name)
  static ReadWriteCache getReadWriteCache(name)
}

beans = {
  cacheManager(CacheManager){ bean ->
    bean.factoryMethod = 'getInstance'

  cacheDecorator(MethodInvokingFactoryBean) { bean ->
    bean.dependsOn = ['cacheManager']
    targetClass = CacheManager
    targetMethod = 'getInstance'      
  }

  pdfProcessor(PDFProcessor){
    documentCache = "#{cacheDecorator.getReadOnlyCache('docscache')}"
  }
  isbnValidator(ISBNValidator){
    cache = "#{cacheDecorator.getReadWriteCache('simplecache')}"
  }

将cacheDecorator配置为MethodInvokingFactoryBean，返回单例cacheManager，以安全地调用其方法

Answer 1

如果您只想在调用getter方法之前确保正确设置了cacheManager，那么您可以在配置级别使用以下方法来实现

cacheManager(CacheManager) { ... }

pdfDocumentCache(MethodInvokingFactoryBean) { bean ->
  bean.dependsOn = ['cacheManager']
  targetClass = CacheManager
  targetMethod = 'getROCache'
  arguments = ['somecache']
}

pdfProcessor(PDFProcessor) {
  documentCache = pdfDocumentCache
}

dependsOn应该确保在初始化cacheManagerbean之前不会调用静态getROCache方法