org.springframework.core.type.classreading

Class CachingMetadataReaderFactory

java.lang.Object

org.springframework.core.type.classreading.SimpleMetadataReaderFactory

org.springframework.core.type.classreading.CachingMetadataReaderFactory

All Implemented Interfaces:

MetadataReaderFactory

public class CachingMetadataReaderFactory
extends SimpleMetadataReaderFactory

Caching implementation of the MetadataReaderFactory interface, caching MetadataReader per Spring Resource handle (i.e. per ".class" file).

Since:

2.5

Author:

Juergen Hoeller, Costin Leau

Field Summary

Fields

Modifier and Type	Field and Description
private int	cacheLimit
static int	DEFAULT_CACHE_LIMIT Default maximum number of entries for the MetadataReader cache: 256
private java.util.Map<Resource,MetadataReader>	metadataReaderCache

Constructor Summary

Constructors

Constructor and Description
CachingMetadataReaderFactory() Create a new CachingMetadataReaderFactory for the default class loader.
CachingMetadataReaderFactory(java.lang.ClassLoader classLoader) Create a new CachingMetadataReaderFactory for the given class loader.
CachingMetadataReaderFactory(ResourceLoader resourceLoader) Create a new CachingMetadataReaderFactory for the given resource loader.

Method Summary

Modifier and Type	Method and Description
void	clearCache() Clear the entire MetadataReader cache, removing all cached class metadata.
int	getCacheLimit() Return the maximum number of entries for the MetadataReader cache.
MetadataReader	getMetadataReader(Resource resource) Obtain a MetadataReader for the given resource.
void	setCacheLimit(int cacheLimit) Specify the maximum number of entries for the MetadataReader cache.

Methods inherited from class org.springframework.core.type.classreading.SimpleMetadataReaderFactory

getMetadataReader, getResourceLoader

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_CACHE_LIMIT

public static final int DEFAULT_CACHE_LIMIT

Default maximum number of entries for the MetadataReader cache: 256

See Also:

Constant Field Values

cacheLimit

private volatile int cacheLimit

metadataReaderCache

private final java.util.Map<Resource,MetadataReader> metadataReaderCache

Constructor Detail

CachingMetadataReaderFactory

public CachingMetadataReaderFactory()

Create a new CachingMetadataReaderFactory for the default class loader.

CachingMetadataReaderFactory

public CachingMetadataReaderFactory(ResourceLoader resourceLoader)

Create a new CachingMetadataReaderFactory for the given resource loader.

Parameters:

resourceLoader - the Spring ResourceLoader to use (also determines the ClassLoader to use)

CachingMetadataReaderFactory

public CachingMetadataReaderFactory(java.lang.ClassLoader classLoader)

Create a new CachingMetadataReaderFactory for the given class loader.

Parameters:

classLoader - the ClassLoader to use

Method Detail

setCacheLimit

public void setCacheLimit(int cacheLimit)

Specify the maximum number of entries for the MetadataReader cache. Default is 256.

getCacheLimit

public int getCacheLimit()

Return the maximum number of entries for the MetadataReader cache.

getMetadataReader

public MetadataReader getMetadataReader(Resource resource)
                                 throws java.io.IOException

Description copied from interface: MetadataReaderFactory

Obtain a MetadataReader for the given resource.

Specified by:

getMetadataReader in interface MetadataReaderFactory

Overrides:

getMetadataReader in class SimpleMetadataReaderFactory

Parameters:

resource - the resource (pointing to a ".class" file)

Returns:

a holder for the ClassReader instance (never null)

Throws:

java.io.IOException - in case of I/O failure

clearCache

public void clearCache()

Clear the entire MetadataReader cache, removing all cached class metadata.