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Several enhancements with respect to CachingMetadataReaderFactory handling.

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Added "clearCache()" method to CachingMetadataReaderFactory, for clearing the metadata cache once not needed anymore - in particular when the MetadataReaderFactory instance is long-lived. Also added "setMetadataReaderFactory" method to ClassPathScanningCandidateComponentProvider, analogous to ConfigurationClassPostProcessor.
This commit is contained in:
Juergen Hoeller
2012-12-12 03:07:29 +01:00
committed by unknown
parent e298658ef0
commit 1cb6e3dbb6
4 changed files with 63 additions and 14 deletions
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19
spring-core/src/main/java/org/springframework/core/type/classreading/CachingMetadataReaderFactory.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2010 the original author or authors.
* Copyright 2002-2012 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -40,7 +40,7 @@ public class CachingMetadataReaderFactory extends SimpleMetadataReaderFactory {
private volatile int cacheLimit = DEFAULT_CACHE_LIMIT;
private final Map<Resource, MetadataReader> classReaderCache =
private final Map<Resource, MetadataReader> metadataReaderCache =
new LinkedHashMap<Resource, MetadataReader>(DEFAULT_CACHE_LIMIT, 0.75f, true) {
@Override
protected boolean removeEldestEntry(Map.Entry<Resource, MetadataReader> eldest) {
@@ -95,14 +95,23 @@ public class CachingMetadataReaderFactory extends SimpleMetadataReaderFactory {
if (getCacheLimit() <= 0) {
return super.getMetadataReader(resource);
}
synchronized (this.classReaderCache) {
MetadataReader metadataReader = this.classReaderCache.get(resource);
synchronized (this.metadataReaderCache) {
MetadataReader metadataReader = this.metadataReaderCache.get(resource);
if (metadataReader == null) {
metadataReader = super.getMetadataReader(resource);
this.classReaderCache.put(resource, metadataReader);
this.metadataReaderCache.put(resource, metadataReader);
}
return metadataReader;
}
}
/**
* Clear the entire MetadataReader cache, removing all cached class metadata.
*/
public void clearCache() {
synchronized (this.metadataReaderCache) {
this.metadataReaderCache.clear();
}
}
}