java.lang.Object
- org.springframework.test.context.cache.DefaultContextCache

All Implemented Interfaces:
ContextCache
```
public class DefaultContextCache
extends Object
implements ContextCache
```
Default implementation of the ContextCache API.
Uses a synchronized Map configured with a maximum size and a least recently used (LRU) eviction policy to cache ApplicationContext instances.
The maximum size may be supplied as a constructor argument or set via a system property or Spring property named spring.test.context.cache.maxSize.
Since:
2.5
Author:
Sam Brannen, Juergen Hoeller
See Also:
ContextCacheUtils.retrieveMaxCacheSize()

Field Summary
- Fields inherited from interface org.springframework.test.context.cache.ContextCache
  CONTEXT_CACHE_LOGGING_CATEGORY, DEFAULT_MAX_CONTEXT_CACHE_SIZE, MAX_CONTEXT_CACHE_SIZE_PROPERTY_NAME

Constructor Summary

Constructors
Constructor	Description
`DefaultContextCache()`	Create a new `DefaultContextCache` using the maximum cache size obtained via `ContextCacheUtils.retrieveMaxCacheSize()`.
`DefaultContextCache(int maxSize)`	Create a new `DefaultContextCache` using the supplied maximum cache size.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`	Clear all contexts from the cache, clearing context hierarchy information as well.
`void`	`clearStatistics()`	Clear hit and miss count statistics for the cache (i.e., reset counters to zero).
`boolean`	`contains(MergedContextConfiguration key)`	Determine whether there is a cached context for the given key.
`ApplicationContext`	`get(MergedContextConfiguration key)`	Obtain a cached `ApplicationContext` for the given key.
`int`	`getHitCount()`	Get the overall hit count for this cache.
`int`	`getMaxSize()`	Get the maximum size of this cache.
`int`	`getMissCount()`	Get the overall miss count for this cache.
`int`	`getParentContextCount()`	Determine the number of parent contexts currently tracked within the cache.
`void`	`logStatistics()`	Log the statistics for this `ContextCache` at `DEBUG` level using the "org.springframework.test.context.cache" logging category.
`void`	`put(MergedContextConfiguration key, ApplicationContext context)`	Explicitly add an `ApplicationContext` instance to the cache under the given key, potentially honoring a custom eviction policy.
`void`	`remove(MergedContextConfiguration key, DirtiesContext.HierarchyMode hierarchyMode)`	Remove the context with the given key from the cache and explicitly close it if it is an instance of `ConfigurableApplicationContext`.
`void`	`reset()`	Reset all state maintained by this cache including statistics.
`int`	`size()`	Determine the number of contexts currently stored in the cache.
`String`	`toString()`	Generate a text string containing the implementation type of this cache and its statistics.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - DefaultContextCache
```
public DefaultContextCache()
```
    Create a new DefaultContextCache using the maximum cache size obtained via ContextCacheUtils.retrieveMaxCacheSize().
    Since:
    4.3
    See Also:
    DefaultContextCache(int), ContextCacheUtils.retrieveMaxCacheSize()
  - DefaultContextCache
```
public DefaultContextCache(int maxSize)
```
    Create a new DefaultContextCache using the supplied maximum cache size.
    Parameters:
    maxSize - the maximum cache size
    Throws:
    IllegalArgumentException - if the supplied maxSize value is not positive
    Since:
    4.3
    See Also:
    DefaultContextCache()
- Method Detail
  - contains
```
public boolean contains(MergedContextConfiguration key)
```
    Determine whether there is a cached context for the given key.
    Specified by:
    contains in interface ContextCache
    Parameters:
    key - the context key (never null)
    Returns:
    true if the cache contains a context with the given key
  - get
```
public ApplicationContext get(MergedContextConfiguration key)
```
    Obtain a cached ApplicationContext for the given key.
    The hit and miss counts must be updated accordingly.
    Specified by:
    get in interface ContextCache
    Parameters:
    key - the context key (never null)
    Returns:
    the corresponding ApplicationContext instance, or null if not found in the cache
    See Also:
    ContextCache.remove(org.springframework.test.context.MergedContextConfiguration, org.springframework.test.annotation.DirtiesContext.HierarchyMode)
  - put
```
public void put(MergedContextConfiguration key,
                ApplicationContext context)
```
    Explicitly add an ApplicationContext instance to the cache under the given key, potentially honoring a custom eviction policy.
    Specified by:
    put in interface ContextCache
    Parameters:
    key - the context key (never null)
    context - the ApplicationContext instance (never null)
  - remove
```
public void remove(MergedContextConfiguration key,
                   DirtiesContext.HierarchyMode hierarchyMode)
```
    Remove the context with the given key from the cache and explicitly close it if it is an instance of ConfigurableApplicationContext.
    Generally speaking, this method should be called to properly evict a context from the cache (e.g., due to a custom eviction policy) or if the state of a singleton bean has been modified, potentially affecting future interaction with the context.
    In addition, the semantics of the supplied HierarchyMode must be honored. See the Javadoc for DirtiesContext.HierarchyMode for details.
    Specified by:
    remove in interface ContextCache
    Parameters:
    key - the context key; never null
    hierarchyMode - the hierarchy mode; may be null if the context is not part of a hierarchy
  - size
```
public int size()
```
    Determine the number of contexts currently stored in the cache.
    If the cache contains more than Integer.MAX_VALUE elements, this method must return Integer.MAX_VALUE.
    Specified by:
    size in interface ContextCache
  - getMaxSize
```
public int getMaxSize()
```
    Get the maximum size of this cache.
  - getParentContextCount
```
public int getParentContextCount()
```
    Determine the number of parent contexts currently tracked within the cache.
    Specified by:
    getParentContextCount in interface ContextCache
  - getHitCount
```
public int getHitCount()
```
    Get the overall hit count for this cache.
    A hit is any access to the cache that returns a non-null context for the queried key.
    Specified by:
    getHitCount in interface ContextCache
  - getMissCount
```
public int getMissCount()
```
    Get the overall miss count for this cache.
    A miss is any access to the cache that returns a null context for the queried key.
    Specified by:
    getMissCount in interface ContextCache
  - reset
```
public void reset()
```
    Reset all state maintained by this cache including statistics.
    Specified by:
    reset in interface ContextCache
    See Also:
    ContextCache.clear(), ContextCache.clearStatistics()
  - clear
```
public void clear()
```
    Clear all contexts from the cache, clearing context hierarchy information as well.
    Specified by:
    clear in interface ContextCache
  - clearStatistics
```
public void clearStatistics()
```
    Clear hit and miss count statistics for the cache (i.e., reset counters to zero).
    Specified by:
    clearStatistics in interface ContextCache
  - logStatistics
```
public void logStatistics()
```
    Log the statistics for this ContextCache at DEBUG level using the "org.springframework.test.context.cache" logging category.
    The following information should be logged.
    name of the concrete ContextCache implementation
    ContextCache.size()
    parent context count
    hit count
    miss count
    any other information useful for monitoring the state of this cache
    Specified by:
    logStatistics in interface ContextCache
  - toString
```
public String toString()
```
    Generate a text string containing the implementation type of this cache and its statistics.
    The string returned by this method contains all information required for compliance with the contract for logStatistics().
    Overrides:
    toString in class Object
    Returns:
    a string representation of this cache, including statistics

Class DefaultContextCache

Field Summary

Fields inherited from interface org.springframework.test.context.cache.ContextCache

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

DefaultContextCache

DefaultContextCache

Method Detail

contains

get

put

remove

size

getMaxSize

getParentContextCount

getHitCount

getMissCount

reset

clear

clearStatistics

logStatistics

toString