lukaszlenart edited a comment on pull request #528:
URL: https://github.com/apache/struts/pull/528#issuecomment-1037946560
You can inject them via constructor if you want to or provide a factory
which will be injected into `OgnlUtil` and this factory will be used to create
a proper instance of cache:
```java
public OgnlUtil(
@Inject(StrutsConstants.STRUTS_EXPRESSION_CACHE_FACTORY, required =
false) ExpressionCacheFactory cacheFactory
) {
if (cacheFactory == null) {
// fallback to old mechanism
} else {
this.cache = cacheFactory.createCacheInstance();
}
}
```
and the factory:
```java
class ExpressionCacheFactory {
@Inject(value = StrutsConstants.STRUTS_OGNL_EXPRESSION_CACHE_MAXSIZE,
required = false)
protected void setExpressionsCacheMaxSize(String maxSize) {
expressionsCacheMaxSize.set(Integer.parseInt(maxSize));
expressionsCacheLRU.setEvictionLimit(expressionsCacheMaxSize.get());
}
@Inject(value = StrutsConstants.STRUTS_OGNL_BEANINFO_CACHE_MAXSIZE,
required = false)
protected void setBeanInfoCacheMaxSize(String maxSize) {
beanInfoCacheMaxSize.set(Integer.parseInt(maxSize));
beanInfoCacheLRU.setEvictionLimit(beanInfoCacheMaxSize.get());
}
@Inject(value = StrutsConstants.STRUTS_OGNL_EXPRESSION_CACHE_LRU_MODE,
required = false)
protected void setUseLRUExpressionCache(String useLRUMode) {
useLRUExpressionCache.set(BooleanUtils.toBoolean(useLRUMode));
}
@Inject(value = StrutsConstants.STRUTS_OGNL_BEANINFO_CACHE_LRU_MODE,
required = false)
protected void setUseLRUBeanInfoCache(String useLRUMode) {
useLRUBeanInfoCache.set(BooleanUtils.toBoolean(useLRUMode));
}
public CacheInstance createCacheInstance() {
....
}
}
```
Then you just need to define a bean in `struts-default.xml` and done :)
Take your time and if you need my help let me know. Or if you want to, I can
refactor your code once we merge this PR - working with DI in Struts can be
frustrating on the beginning ;-)
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