ComponentScan excludeFilters在Spring 4.0.6.RELEASE中不起作用 [英] ComponentScan excludeFilters Not Working In Spring 4.0.6.RELEASE

问题描述

我有一个类，我想在组件扫描时排除。我使用下面的代码来做到这一点，但似乎没有工作，虽然一切似乎都是正确的

I have a class which I want to exclude while component scanning. I am using the below code to do that but that doesn't seem to work although everything seems to be right

@ComponentScan(basePackages = { "common", "adapter", "admin"}, excludeFilters = { @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = ServiceImpl.class) })

其实我想拥有ServiceImpl类，它实现了Service接口，正在我的rest api逻辑中使用，同时进行api的集成测试我想排除这个implmentation并加载模拟的实现。但这似乎并没有发生，因为即使使用上面我得到以下错误

Actually I want have "ServiceImpl" class, which implements "Service" interface, is being used in my rest api logic and while doing the integration test of an api I want to exclude this implmentation and load the mocked implementation. But this doesn't seem to happen as even after using the above I am getting the below error

No qualifying bean of type [admin.Service] is defined: expected single matching bean but found 2: ServiceMockImpl,ServiceImpl

我也花了大部分时间都没有，但没有任何作用。

I spent too much of time on this but nothing works.

感谢任何帮助。

推荐答案

经过大量的工作和研究，我注意到Spring在组件扫描方面的行为并不奇怪。

After lot of work and research I noticed that Spring's behavior is little weird in term of component scanning.

工件是这样的：

ServiceImpl是实现服务接口的真正实现类。
ServiceMockImpl是实现服务界面的模拟植入类。

"ServiceImpl" is the real implementation class which implements "Service" interface. "ServiceMockImpl" is the mocked implantation class which implements "Service" interface.

我想调整组件扫描，以便它只加载ServiceMockImpl但不是ServiceImpl。

I wanted to tweak the component scanning so that it only loads the "ServiceMockImpl" but not "ServiceImpl".

我必须在@中添加@ ComponentScan.Filter（type = FilterType.ASSIGNABLE_TYPE，value = ServiceImpl.class） ComponentScan测试配置类，从组件扫描中排除该特定类。但是即使在完成上述更改并且测试失败之后，这两个类都被加载了。

I had to add the "@ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = ServiceImpl.class)", in the "@ComponentScan" of test configuration class, to exclude that particular class from component scanning. But both the classes were getting loaded even after doing the above changes and tests were failing.

经过大量的工作和研究，我发现ServiceImpl已经被加载了，因为另一个正在加载的类，并且在其中包含所有包的@ComponentScan。所以我添加了代码以从组件扫描中排除Application类，如下所示@ ComponentScan.Filter（type = FilterType.ASSIGNABLE_TYPE，value = Application.class）。

After lot of work and research I found that the "ServiceImpl" was getting loaded because of the other class which was getting loaded and has "@ComponentScan" for all packages on top of in it. So I added the code to exclude the "Application" class from the component scanning as follows "@ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = Application.class)".

之后它按预期工作。

下面的代码

@ComponentScan(excludeFilters = {
    @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = OAuthCacheServiceImpl.class),
    @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = Application.class) }, basePackages = {
    "common", "adapter", "admin"})

<我已经看到很多关于组件扫描的问题很长时间没有答案，因此我想添加这些细节，因为它可能会对未来的某些人有所帮助。

I have seen that lot of questions on component scanning are unanswered for long hence I thought to add these details as it may help somebody in the future.

HTH .. 。

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