Class EnvironmentCache
- java.lang.Object
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- org.apache.commons.discovery.tools.EnvironmentCache
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public class EnvironmentCache extends java.lang.Object
Cache by a 'key' unique to the environment: - ClassLoader::groupContext::Object Cache Cache : HashMap Key : Thread Context Class Loader (ClassLoader
) Value : groupContext::SPI Cache (HashMap
) //- groupContext::Object Cache // Cache : HashMap // Key : groupContext (String
) // Value :Object
When we 'release', it is expected that the caller of the 'release' have the same thread context class loader... as that will be used to identify cached entries to be released.
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Field Summary
Fields Modifier and Type Field Description static int
smallHashSize
Initial hash size for SPI's, default just seem TO big today..
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Constructor Summary
Constructors Constructor Description EnvironmentCache()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static java.util.Map<java.lang.String,java.lang.Object>
get(java.lang.ClassLoader classLoader)
Get object keyed by classLoader.static void
put(java.lang.ClassLoader classLoader, java.util.Map<java.lang.String,java.lang.Object> spis)
Put service keyed by spi & classLoader.static void
release()
Release all internal references to previously created service instances associated with the current thread context class loader.static void
release(java.lang.ClassLoader classLoader)
Release any internal references to a previously created service instance associated with the current thread context class loader.
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Field Detail
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smallHashSize
public static final int smallHashSize
Initial hash size for SPI's, default just seem TO big today..- See Also:
- Constant Field Values
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Constructor Detail
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EnvironmentCache
public EnvironmentCache()
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Method Detail
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get
public static java.util.Map<java.lang.String,java.lang.Object> get(java.lang.ClassLoader classLoader)
Get object keyed by classLoader.- Parameters:
classLoader
- The class loader key- Returns:
- The SPI name/instance cache
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put
public static void put(java.lang.ClassLoader classLoader, java.util.Map<java.lang.String,java.lang.Object> spis)
Put service keyed by spi & classLoader.- Parameters:
classLoader
- The class loader keyspis
- The SPI name/instance cache
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release
public static void release()
Release all internal references to previously created service instances associated with the current thread context class loader. Therelease()
method is called for service instances that implement theService
interface. This is useful in environments like servlet containers, which implement application reloading by throwing away a ClassLoader. Dangling references to objects in that class loader would prevent garbage collection.
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release
public static void release(java.lang.ClassLoader classLoader)
Release any internal references to a previously created service instance associated with the current thread context class loader. If the SPI instance implementsService
, then callrelease()
.- Parameters:
classLoader
- The class loader key
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