javax.cache
Class SimpleConfiguration<K,V>

java.lang.Object
  javax.cache.SimpleConfiguration<K,V>

Type Parameters:

K - the type of keys maintained the cache

V - the type of cached values

All Implemented Interfaces:

Configuration<K,V>

public class SimpleConfiguration<K,V>
extends Object
implements Configuration<K,V>

A simple mutable implementation of a Configuration.

Since:

1.0

Author:

Brian Oliver

Nested Class Summary

Nested classes/interfaces inherited from interface javax.cache.Configuration

Configuration.Duration

Field Summary

protected ArrayList<CacheEntryListenerRegistration<? super K,? super V>>	cacheEntryListenerRegistrations The CacheEntryListenerRegistrations for the Configuration.
protected CacheLoader<K,? extends V>	cacheLoader The CacheLoader for the built Configuration.
protected CacheWriter<? super K,? super V>	cacheWriter The CacheWriter for the built Configuration.
protected ExpiryPolicy<? super K,? super V>	expiryPolicy The ExpiryPolicy for the Configuration.
protected boolean	isReadThrough A flag indicating if "read-through" mode is required.
protected boolean	isStatisticsEnabled A flag indicating if statistics gathering is enabled.
protected boolean	isStoreByValue A flag indicating if the cache will be store-by-value or store-by-reference.
protected boolean	isTransactionsEnabled A flag indicating if the cache will use transactions.
protected boolean	isWriteThrough A flag indicating if "write-through" mode is required.
protected IsolationLevel	txnIsolationLevel The transaction IsolationLevel.
protected Mode	txnMode The transaction Mode.

Constructor Summary

SimpleConfiguration()
Constructs an SimpleConfiguration with the standard default values.

SimpleConfiguration(Configuration<K,V> configuration)
A copy-constructor for a SimpleConfiguration.

SimpleConfiguration(Iterable<CacheEntryListenerRegistration<? super K,? super V>> cacheEntryListenerRegistrations, CacheLoader<K,? extends V> cacheLoader, CacheWriter<? super K,? super V> cacheWriter, ExpiryPolicy<? super K,? super V> expiryPolicy, boolean isReadThrough, boolean isWriteThrough, boolean isStatisticsEnabled, boolean isStoreByValue, boolean isTransactionsEnabled, IsolationLevel txnIsolationLevel, Mode txnMode)
Constructs a SimpleConfiguration based on a set of parameters.

Method Summary

boolean	equals(Object object)
Iterable<CacheEntryListenerRegistration<? super K,? super V>>	getCacheEntryListenerRegistrations() Obtains the CacheEntryListenerRegistrations for CacheEntryListeners to be configured on a Cache.
CacheLoader<K,? extends V>	getCacheLoader() Gets the registered CacheLoader, if any.
CacheWriter<? super K,? super V>	getCacheWriter() Gets the registered CacheWriter, if any.
ExpiryPolicy<? super K,? super V>	getExpiryPolicy() Gets the ExpiryPolicy to be used for caches.
IsolationLevel	getTransactionIsolationLevel() Gets the transaction isolation level.
Mode	getTransactionMode() Gets the transaction mode.
int	hashCode()
boolean	isReadThrough() Determines if a Cache should operate in "read-through" mode.
boolean	isStatisticsEnabled() Checks whether statistics collection is enabled in this cache.
boolean	isStoreByValue() Whether storeByValue (true) or storeByReference (false).
boolean	isTransactionsEnabled() Checks whether transactions are enabled for this cache.
boolean	isWriteThrough() Determines if a Cache should operate in "write-through" mode.
SimpleConfiguration<K,V>	registerCacheEntryListener(CacheEntryListener<? super K,? super V> cacheEntryListener, boolean requireOldValue, CacheEntryEventFilter<? super K,? super V> cacheEntryEventFilter, boolean synchronous) Add a CacheEntryListener.
SimpleConfiguration<K,V>	setCacheLoader(CacheLoader<K,? extends V> loader) Set the CacheLoader.
SimpleConfiguration<K,V>	setCacheWriter(CacheWriter<? super K,? super V> writer) Set the CacheWriter.
SimpleConfiguration<K,V>	setExpiryPolicy(ExpiryPolicy<? super K,? super V> policy) Set the ExpiryPolicy.
SimpleConfiguration<K,V>	setReadThrough(boolean isReadThrough) Set if read-through caching should be used.
void	setStatisticsEnabled(boolean isStatisticsEnabled) Sets whether statistics gathering is enabled on this cache.
SimpleConfiguration<K,V>	setStoreByValue(boolean isStoreByValue) Set if a configured cache should use "store-by-value" or "store-by-reference" semantics.
SimpleConfiguration<K,V>	setTransactionMode(Mode mode) Set the Transaction Mode.
SimpleConfiguration<K,V>	setTransactions(IsolationLevel level, Mode mode) Set the Transaction IsolationLevel and Mode.
SimpleConfiguration<K,V>	setTransactionsEnabled(boolean isTransactionsEnabled) Set if transactions should be enabled.
SimpleConfiguration<K,V>	setWriteThrough(boolean isWriteThrough) Set if write-through caching should be used.

Methods inherited from class java.lang.Object

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

Field Detail

cacheEntryListenerRegistrations

protected ArrayList<CacheEntryListenerRegistration<? super K,? super V>> cacheEntryListenerRegistrations

The CacheEntryListenerRegistrations for the Configuration.

cacheLoader

protected CacheLoader<K,? extends V> cacheLoader

The CacheLoader for the built Configuration.

cacheWriter

protected CacheWriter<? super K,? super V> cacheWriter

The CacheWriter for the built Configuration.

expiryPolicy

protected ExpiryPolicy<? super K,? super V> expiryPolicy

The ExpiryPolicy for the Configuration.

isReadThrough

protected boolean isReadThrough

A flag indicating if "read-through" mode is required.

isWriteThrough

protected boolean isWriteThrough

A flag indicating if "write-through" mode is required.

isStatisticsEnabled

protected boolean isStatisticsEnabled

A flag indicating if statistics gathering is enabled.

isStoreByValue

protected boolean isStoreByValue

A flag indicating if the cache will be store-by-value or store-by-reference.

isTransactionsEnabled

protected boolean isTransactionsEnabled

A flag indicating if the cache will use transactions.

txnIsolationLevel

protected IsolationLevel txnIsolationLevel

The transaction IsolationLevel.

txnMode

protected Mode txnMode

The transaction Mode.

Constructor Detail

SimpleConfiguration

public SimpleConfiguration()

Constructs an SimpleConfiguration with the standard default values.

SimpleConfiguration

public SimpleConfiguration(Iterable<CacheEntryListenerRegistration<? super K,? super V>> cacheEntryListenerRegistrations,
                           CacheLoader<K,? extends V> cacheLoader,
                           CacheWriter<? super K,? super V> cacheWriter,
                           ExpiryPolicy<? super K,? super V> expiryPolicy,
                           boolean isReadThrough,
                           boolean isWriteThrough,
                           boolean isStatisticsEnabled,
                           boolean isStoreByValue,
                           boolean isTransactionsEnabled,
                           IsolationLevel txnIsolationLevel,
                           Mode txnMode)

Constructs a SimpleConfiguration based on a set of parameters.

Parameters:

cacheEntryListenerRegistrations - the CacheEntryListenerRegistrations

cacheLoader - the CacheLoader

cacheWriter - the CacheWriter

expiryPolicy - the ExpiryPolicy

isReadThrough - is read-through caching supported

isWriteThrough - is write-through caching supported

isStatisticsEnabled - are statistics enabled

isStoreByValue - true if the "store-by-value" more or false for "store-by-reference"

isTransactionsEnabled - true if transactions are enabled

txnIsolationLevel - the IsolationLevel

txnMode - the Mode

SimpleConfiguration

public SimpleConfiguration(Configuration<K,V> configuration)

A copy-constructor for a SimpleConfiguration.

Parameters:

configuration - the Configuration from which to copy

Method Detail

getCacheEntryListenerRegistrations

public Iterable<CacheEntryListenerRegistration<? super K,? super V>> getCacheEntryListenerRegistrations()

Obtains the CacheEntryListenerRegistrations for CacheEntryListeners to be configured on a Cache.

Specified by:

getCacheEntryListenerRegistrations in interface Configuration<K,V>

Returns:

an Iterable over the CacheEntryListenerRegistrations

registerCacheEntryListener

public SimpleConfiguration<K,V> registerCacheEntryListener(CacheEntryListener<? super K,? super V> cacheEntryListener,
                                                           boolean requireOldValue,
                                                           CacheEntryEventFilter<? super K,? super V> cacheEntryEventFilter,
                                                           boolean synchronous)

Add a CacheEntryListener. If the specified CacheEntryListenerRegistration is already known, the request to add it is ignored.

Parameters:

cacheEntryListener - the CacheEntryListener

requireOldValue - whether the old value is supplied to CacheEntryEvent.

cacheEntryEventFilter - the CacheEntryEventFilter

synchronous - whether the caller is blocked until the listener invocation completes.

getCacheLoader

public CacheLoader<K,? extends V> getCacheLoader()

Gets the registered CacheLoader, if any.

A CacheLoader should be configured for "Read Through" caches to load values when a cache miss occurs using either the Cache.get(Object) and/or Cache#getAll(java.util.Set methods.

The default value is null.

Specified by:

getCacheLoader in interface Configuration<K,V>

Returns:

the CacheLoader or null if none has been set.

setCacheLoader

public SimpleConfiguration<K,V> setCacheLoader(CacheLoader<K,? extends V> loader)

Set the CacheLoader.

Parameters:

loader - the CacheLoader

Returns:

the SimpleConfiguration to permit fluent-style method calls

getCacheWriter

public CacheWriter<? super K,? super V> getCacheWriter()

Gets the registered CacheWriter, if any.

The default value is null.

Specified by:

getCacheWriter in interface Configuration<K,V>

Returns:

the CacheWriter or null if none has been set.

setCacheWriter

public SimpleConfiguration<K,V> setCacheWriter(CacheWriter<? super K,? super V> writer)

Set the CacheWriter.

Parameters:

writer - the CacheWriter

Returns:

the SimpleConfiguration to permit fluent-style method calls

getExpiryPolicy

public ExpiryPolicy<? super K,? super V> getExpiryPolicy()

Gets the ExpiryPolicy to be used for caches.

The default value is ExpiryPolicy#DEFAULT.

Specified by:

getExpiryPolicy in interface Configuration<K,V>

Returns:

the ExpiryPolicy (must not be null)

setExpiryPolicy

public SimpleConfiguration<K,V> setExpiryPolicy(ExpiryPolicy<? super K,? super V> policy)

Set the ExpiryPolicy. If null is specified the ExpiryPolicy Default is assumed.

Parameters:

policy - the ExpiryPolicy

Returns:

the SimpleConfiguration to permit fluent-style method calls

getTransactionIsolationLevel

public IsolationLevel getTransactionIsolationLevel()

Gets the transaction isolation level.

The default value is IsolationLevel.NONE.

Specified by:

getTransactionIsolationLevel in interface Configuration<K,V>

Returns:

the isolation level.

setTransactions

public SimpleConfiguration<K,V> setTransactions(IsolationLevel level,
                                                Mode mode)

Set the Transaction IsolationLevel and Mode.

Parameters:

level - the IsolationLevel

mode - the Mode

Returns:

the SimpleConfiguration to permit fluent-style method calls

getTransactionMode

public Mode getTransactionMode()

Gets the transaction mode.

The default value is Mode.NONE.

Specified by:

getTransactionMode in interface Configuration<K,V>

Returns:

the the mode of the cache.

setTransactionMode

public SimpleConfiguration<K,V> setTransactionMode(Mode mode)

Set the Transaction Mode.

Parameters:

mode - the Mode

Returns:

the SimpleConfiguration to permit fluent-style method calls

isReadThrough

public boolean isReadThrough()

Determines if a Cache should operate in "read-through" mode.

When in "read-through" mode, cache misses that occur due to cache entries not existing as a result of performing a "get" call via one of Cache.get(Object), Cache.getAll(java.util.Set), Cache.getAndRemove(Object) and/or Cache.getAndReplace(Object, Object) will appropriately cause the configured CacheLoader to be invoked.

The default value is false.

Specified by:

isReadThrough in interface Configuration<K,V>

Returns:

true when a Cache is in "read-through" mode.

See Also:

Configuration.getCacheLoader()

setReadThrough

public SimpleConfiguration<K,V> setReadThrough(boolean isReadThrough)

Set if read-through caching should be used.

Parameters:

isReadThrough - true if read-through is required

Returns:

the SimpleConfiguration to permit fluent-style method calls

isWriteThrough

public boolean isWriteThrough()

Determines if a Cache should operate in "write-through" mode.

When in "write-through" mode, cache updates that occur as a result of performing "put" operations called via one of Cache.put(Object, Object), Cache.getAndRemove(Object), Cache.removeAll(), Cache.getAndPut(Object, Object) Cache.getAndRemove(Object), Cache.getAndReplace(Object, Object), Cache.invokeEntryProcessor(Object, javax.cache.Cache.EntryProcessor) will appropriately cause the configured CacheWriter to be invoked.

The default value is false.

Specified by:

isWriteThrough in interface Configuration<K,V>

Returns:

true when a Cache is in "write-through" mode.

See Also:

Configuration.getCacheWriter()

setWriteThrough

public SimpleConfiguration<K,V> setWriteThrough(boolean isWriteThrough)

Set if write-through caching should be used.

Parameters:

isWriteThrough - true if write-through is required

Returns:

the SimpleConfiguration to permit fluent-style method calls

isStoreByValue

public boolean isStoreByValue()

Whether storeByValue (true) or storeByReference (false). When true, both keys and values are stored by value.

When false, both keys and values are stored by reference. Caches stored by reference are capable of mutation by any threads holding the reference. The effects are:

• if the key is mutated, then the key may not be retrievable or removable
• if the value is mutated, then all threads in the JVM can potentially observe those mutations, subject to the normal Java Memory Model rules.

Storage by reference only applies to the local heap. If an entry is moved off heap it will need to be transformed into a representation. Any mutations that occur after transformation may not be reflected in the cache.

When a cache is storeByValue, any mutation to the key or value does not affect the key of value stored in the cache.

The default value is true.

Specified by:

isStoreByValue in interface Configuration<K,V>

Returns:

true if the cache is store by value

setStoreByValue

public SimpleConfiguration<K,V> setStoreByValue(boolean isStoreByValue)

Set if a configured cache should use "store-by-value" or "store-by-reference" semantics.

Parameters:

isStoreByValue - true if "store-by-value" is required, false for "store-by-reference"

Returns:

the SimpleConfiguration to permit fluent-style method calls

isStatisticsEnabled

public boolean isStatisticsEnabled()

Checks whether statistics collection is enabled in this cache.

The default value is false.

Specified by:

isStatisticsEnabled in interface Configuration<K,V>

Returns:

true if statistics collection is enabled

setStatisticsEnabled

public void setStatisticsEnabled(boolean isStatisticsEnabled)

Sets whether statistics gathering is enabled on this cache. This may be changed at runtime.

Specified by:

setStatisticsEnabled in interface Configuration<K,V>

Parameters:

isStatisticsEnabled - true to enable statistics, false to disable.

isTransactionsEnabled

public boolean isTransactionsEnabled()

Checks whether transactions are enabled for this cache.

Note that in a transactional cache, entries being mutated within a transaction cannot be expired by the cache.

The default value is false.

Specified by:

isTransactionsEnabled in interface Configuration<K,V>

Returns:

true if transaction are enabled

setTransactionsEnabled

public SimpleConfiguration<K,V> setTransactionsEnabled(boolean isTransactionsEnabled)

Set if transactions should be enabled.

Parameters:

isTransactionsEnabled - true if transactions should be enabled

Returns:

the SimpleConfiguration to permit fluent-style method calls

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object object)

Overrides:

equals in class Object