Spring Context 6.1.4 · org.springframework.cache.concurrent.ConcurrentMapCacheManager

CacheManager implementation that lazily builds ConcurrentMapCache instances for each getCache request. Also supports a 'static' mode where the set of cache names is pre-defined through setCacheNames, with no dynamic creation of further cache regions at runtime.

Supports the asynchronous Cache#retrieve(Object) and Cache#retrieve(Object, Supplier) operations through basic CompletableFuture adaptation, with early-determined cache misses.

Note

This is by no means a sophisticated CacheManager; it comes with no cache configuration options. However, it may be useful for testing or simple caching scenarios. For advanced local caching needs, consider org.springframework.cache.caffeine.CaffeineCacheManager or org.springframework.cache.jcache.JCacheCacheManager.

Field Summary

Modifier and Type	Field and Description
private boolean	allowNullValues
private final ConcurrentMap<String, Cache>	cacheMap
private boolean	dynamic
private SerializationDelegate	serialization
private boolean	storeByValue

Constructor Summary

Access	Constructor and Description
public	ConcurrentMapCacheManager() Construct a dynamic ConcurrentMapCacheManager, lazily creating cache instances as they are being requested.
public	ConcurrentMapCacheManager(String... cacheNames) Construct a static ConcurrentMapCacheManager, managing caches for the specified cache names only.

Method Summary

Modifier and Type	Method and Description
protected Cache	Returns: the ConcurrentMapCache (or a decorator thereof) createConcurrentMapCache(String the name of the cache name) Create a new ConcurrentMapCache instance for the specified cache name.
public Cache	getCache(String the cache identifier (must not be `null`) name) Implements org.springframework.cache.CacheManager.getCache. Get the cache associated with the given name.
public Collection<String>	getCacheNames() Implements org.springframework.cache.CacheManager.getCacheNames. Get a collection of the cache names known by this manager.
public boolean	isAllowNullValues() Return whether this cache manager accepts and converts `null` values for all of its caches.
public boolean	isStoreByValue() Return whether this cache manager stores a copy of each entry or a reference for all its caches.
private void	recreateCaches()
public void	setAllowNullValues(boolean allowNullValues) Specify whether to accept and convert `null` values for all caches in this cache manager.
public void	setBeanClassLoader(ClassLoader the owning class loader classLoader) Implements org.springframework.beans.factory.BeanClassLoaderAware.setBeanClassLoader. Callback that supplies the bean `class loader` to a bean instance.
public void	setCacheNames(Collection<String> cacheNames) Specify the set of cache names for this CacheManager's 'static' mode.
public void	setStoreByValue(boolean storeByValue) Specify whether this cache manager stores a copy of each entry (`true` or the reference (`false` for all of its caches.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

allowNullValues	back to summary
private boolean allowNullValues

cacheMap	back to summary
private final ConcurrentMap<String, Cache> cacheMap

dynamic	back to summary
private boolean dynamic

serialization	back to summary
private SerializationDelegate serialization Annotations @Nullable

storeByValue	back to summary
private boolean storeByValue

Constructor Detail

ConcurrentMapCacheManager	back to summary
public ConcurrentMapCacheManager() Construct a dynamic ConcurrentMapCacheManager, lazily creating cache instances as they are being requested.

ConcurrentMapCacheManager	back to summary
public ConcurrentMapCacheManager(String... cacheNames) Construct a static ConcurrentMapCacheManager, managing caches for the specified cache names only.

Method Detail

createConcurrentMapCache	back to summary
protected Cache createConcurrentMapCache(String name) Create a new ConcurrentMapCache instance for the specified cache name. Parameters name:String the name of the cache Returns:Cache the ConcurrentMapCache (or a decorator thereof)

createConcurrentMapCache

back to summary

protected Cache createConcurrentMapCache(String name)

Create a new ConcurrentMapCache instance for the specified cache name.

Parameters

name:String: the name of the cache

Returns:Cache

the ConcurrentMapCache (or a decorator thereof)

getCache back to summary

getCache	back to summary
public Cache getCache(String name) Implements org.springframework.cache.CacheManager.getCache. Doc from org.springframework.cache.CacheManager.getCache. Get the cache associated with the given name. Note that the cache may be lazily created at runtime if the native provider supports it. Parameters name:String the cache identifier (must not be `null`) Returns:Cache the associated cache, or `null` if such a cache does not exist or could be not created Annotations @Override @Nullable

public Cache getCache(String name)

Implements org.springframework.cache.CacheManager.getCache.

Doc from org.springframework.cache.CacheManager.getCache.

Get the cache associated with the given name.

Note that the cache may be lazily created at runtime if the native provider supports it.

Parameters

name:String: the cache identifier (must not be null)

Returns:Cache

the associated cache, or null if such a cache does not exist or could be not created

Annotations

@Override
@Nullable

getCacheNames	back to summary
public Collection<String> getCacheNames() Implements org.springframework.cache.CacheManager.getCacheNames. Doc from org.springframework.cache.CacheManager.getCacheNames. Get a collection of the cache names known by this manager. Returns:Collection<String> the names of all caches known by the cache manager Annotations @Override

getCacheNames

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public Collection<String> getCacheNames()

Implements org.springframework.cache.CacheManager.getCacheNames.

Doc from org.springframework.cache.CacheManager.getCacheNames.

Get a collection of the cache names known by this manager.

Returns:Collection<String>

the names of all caches known by the cache manager

Annotations

@Override

isAllowNullValues	back to summary
public boolean isAllowNullValues() Return whether this cache manager accepts and converts `null` values for all of its caches.

isStoreByValue	back to summary
public boolean isStoreByValue() Return whether this cache manager stores a copy of each entry or a reference for all its caches. If store by value is enabled, any cache entry must be serializable. Since 4.3

isStoreByValue

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public boolean isStoreByValue()

Return whether this cache manager stores a copy of each entry or a reference for all its caches. If store by value is enabled, any cache entry must be serializable.

Since: 4.3

recreateCaches	back to summary
private void recreateCaches()

setAllowNullValues back to summary

setAllowNullValues	back to summary
public void setAllowNullValues(boolean allowNullValues) Specify whether to accept and convert `null` values for all caches in this cache manager. Default is "true", despite ConcurrentHashMap itself not supporting `null` values. An internal holder object will be used to store user-level `null`s. Note A change of the null-value setting will reset all existing caches, if any, to reconfigure them with the new null-value requirement.

public void setAllowNullValues(boolean allowNullValues)

Specify whether to accept and convert null values for all caches in this cache manager.

Default is "true", despite ConcurrentHashMap itself not supporting null values. An internal holder object will be used to store user-level nulls.

Note

A change of the null-value setting will reset all existing caches, if any, to reconfigure them with the new null-value requirement.

setBeanClassLoader back to summary

setBeanClassLoader	back to summary
public void setBeanClassLoader(ClassLoader classLoader) Implements org.springframework.beans.factory.BeanClassLoaderAware.setBeanClassLoader. Doc from org.springframework.beans.factory.BeanClassLoaderAware.setBeanClassLoader. Callback that supplies the bean `class loader` to a bean instance. Invoked after the population of normal bean properties but before an initialization callback such as `InitializingBean's` `InitializingBean#afterPropertiesSet()` method or a custom init-method. Parameters classLoader:ClassLoader the owning class loader Annotations @Override

public void setBeanClassLoader(ClassLoader classLoader)

Implements org.springframework.beans.factory.BeanClassLoaderAware.setBeanClassLoader.

Doc from org.springframework.beans.factory.BeanClassLoaderAware.setBeanClassLoader.

Callback that supplies the bean class loader to a bean instance.

Invoked after the population of normal bean properties but before an initialization callback such as InitializingBean's InitializingBean#afterPropertiesSet() method or a custom init-method.

Parameters

classLoader:ClassLoader: the owning class loader

Annotations

@Override

setCacheNames back to summary

setCacheNames	back to summary
public void setCacheNames(Collection<String> cacheNames) Specify the set of cache names for this CacheManager's 'static' mode. The number of caches and their names will be fixed after a call to this method, with no creation of further cache regions at runtime. Calling this with a `null` collection argument resets the mode to 'dynamic', allowing for further creation of caches again.

public void setCacheNames(Collection<String> cacheNames)

Specify the set of cache names for this CacheManager's 'static' mode.

The number of caches and their names will be fixed after a call to this method, with no creation of further cache regions at runtime.

Calling this with a null collection argument resets the mode to 'dynamic', allowing for further creation of caches again.

setStoreByValue back to summary

setStoreByValue	back to summary
public void setStoreByValue(boolean storeByValue) Specify whether this cache manager stores a copy of each entry (`true` or the reference (`false` for all of its caches. Default is "false" so that the value itself is stored and no serializable contract is required on cached values. Note A change of the store-by-value setting will reset all existing caches, if any, to reconfigure them with the new store-by-value requirement. Since 4.3

public void setStoreByValue(boolean storeByValue)

Specify whether this cache manager stores a copy of each entry (true or the reference (false for all of its caches.

Default is "false" so that the value itself is stored and no serializable contract is required on cached values.

Note

A change of the store-by-value setting will reset all existing caches, if any, to reconfigure them with the new store-by-value requirement.

Since: 4.3

public Class ConcurrentMapCacheManager

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail