com.hazelcast.cache

Interface ICache<K,V>

Type Parameters:

K - the type of key.

V - the type of value.

All Superinterfaces:

AutoCloseable, javax.cache.Cache<K,V>, Closeable, DistributedObject, Iterable<javax.cache.Cache.Entry<K,V>>, PrefixedDistributedObject

public interface ICache<K,V>
extends javax.cache.Cache<K,V>, PrefixedDistributedObject

This ICache interface is the Cache extension offered by Hazelcast JCache.
In addition to the standard set of JCache methods defined in the JSR 107 specification, Hazelcast provides additional operations to support a broader range of programing styles.

There are three different types of extensions methods provided:

• asynchronous version of typical blocking cache operations (due to remote calls),
• typical cache operations, providing a custom ExpiryPolicy parameter to apply a special expiration to that specific operation, and
• common collection-like operations (e.g. size()) or typical Hazelcast-list additions (e.g. destroy()).

To take advantage of the methods of this interface, the Cache instance needs to be unwrapped as defined in the JSR 107 standard (Cache.unwrap(Class)) by providing the ICache interface parameter.

   ICache<Key , Value> unwrappedCache =  cache.unwrap( ICache.class );
 

The unwrapped cache instance can now be used for both ICache and Cache operations.

Asynchronous operations:
For most of the typical operations, Hazelcast provides asynchronous versions to program in a more reactive styled way. All asynchronous operations follow the same naming pattern: the operation's name from JCache extended by the term Async; for example, the asynchronous version of Cache.get(Object) is getAsync(Object).
These methods return a CompletionStage that can be used to chain further computation stages. Alternatively, a CompletableFuture can be obtained via CompletionStage.toCompletableFuture() to wait for the operation to be completed in a blocking fashion with Future.get() or Future.get(long, java.util.concurrent.TimeUnit).

In a reactive way:

   CompletionStage<Value> stage = unwrappedCache.getAsync( "key-1" ) ;
   stage.thenAcceptAsync(value -> {
         System.out.println(value);
     });
 

Or in a blocking way:

   CompletionStage<Value> stage = unwrappedCache.getAsync( "key-1" ) ;
   Value value = stage.toCompletableFuture().get();
   System.out.println( value );
 

Execution properties of returned CompletionStages

Actions supplied for dependent completions of non-async methods and async methods without an explicit Executor argument are performed by the ForkJoinPool.commonPool() (unless it does not support a parallelism level of at least 2, in which case a new Thread is created per task).

Dependent actions can be registered on the returned CompletionStage. Their execution follows CompletableFuture execution conventions:

• dependent actions registered by non-async methods may be executed by the thread that completes the current CompletableFuture or by any other caller of a completion method.
• dependent actions registered by default async methods without an explicit Executor argument are executed by ForkJoinPool.commonPool() unless its parallelism level is less than 2, in which case a new Thread is created to run each action

Custom ExpiryPolicy:
For most of the typical operations, Hazelcast provides overloaded versions with an additional ExpiryPolicy parameter to configure a different expiration policy from the default one set in the CompleteConfiguration passed to the cache creation. Therefore the Cache.put(Object, Object) operation has an overload put(Object, Object, javax.cache.expiry.ExpiryPolicy) to pass in the special policy.

Important: The overloads use an instance of ExpiryPolicy, not a Factory instance as is used in the configuration.

   unwrappedCache.put( "key", "value", new AccessedExpiryPolicy( Duration.ONE_DAY ) );
 

Split-brain

Behaviour of ICache under split-brain scenarios should be taken into account when using this data structure. During a split, each partitioned cluster will either create a brand new ICache or it will continue to use the primary or back-up version.

As a defensive mechanism against such inconsistency, consider using the in-built split-brain protection for ICache. Using this functionality it is possible to restrict operations in smaller partitioned clusters. It should be noted that there is still an inconsistency window between the time of the split and the actual detection. Therefore using this reduces the window of inconsistency but can never completely eliminate it.

Since:

3.3.1

See Also:

Cache

Nested Class Summary

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

javax.cache.Cache.Entry<K,V>

Method Summary

Modifier and Type	Method and Description
UUID	addPartitionLostListener(com.hazelcast.cache.impl.event.CachePartitionLostListener listener) Adds a CachePartitionLostListener.
void	destroy() Closes the cache.
V	get(K key, javax.cache.expiry.ExpiryPolicy expiryPolicy) Retrieves the mapped value of the given key using a custom ExpiryPolicy.
Map<K,V>	getAll(Set<? extends K> keys, javax.cache.expiry.ExpiryPolicy expiryPolicy) Gets a collection of entries from the cache with custom expiry policy, returning them as Map of the values associated with the set of keys requested.
V	getAndPut(K key, V value, javax.cache.expiry.ExpiryPolicy expiryPolicy) Associates the specified value with the specified key in this cache using a custom ExpiryPolicy, returning an existing value if one existed.
CompletionStage<V>	getAndPutAsync(K key, V value) Asynchronously associates the specified value with the specified key in this cache, returning an existing value if one existed.
CompletionStage<V>	getAndPutAsync(K key, V value, javax.cache.expiry.ExpiryPolicy expiryPolicy) Asynchronously associates the specified value with the specified key in this cache, returning an existing value if one existed using a custom ExpiryPolicy.
CompletionStage<V>	getAndRemoveAsync(K key) Asynchronously removes the entry for a key and returns the previously assigned value or null if no value was assigned.
V	getAndReplace(K key, V value, javax.cache.expiry.ExpiryPolicy expiryPolicy) Atomically replaces the assigned value of the given key by the specified value using a custom ExpiryPolicy and returns the previously assigned value.
CompletionStage<V>	getAndReplaceAsync(K key, V value) Asynchronously replaces the assigned value of the given key by the specified value and returns the previously assigned value.
CompletionStage<V>	getAndReplaceAsync(K key, V value, javax.cache.expiry.ExpiryPolicy expiryPolicy) Asynchronously replaces the assigned value of the given key by the specified value using a custom ExpiryPolicy and returns the previously assigned value.
CompletionStage<V>	getAsync(K key) Asynchronously retrieves the mapped value of the given key using a custom ExpiryPolicy.
CompletionStage<V>	getAsync(K key, javax.cache.expiry.ExpiryPolicy expiryPolicy) Asynchronously gets an entry from cache using a custom ExpiryPolicy.
CacheStatistics	getLocalCacheStatistics() Directly access local Cache Statistics.
boolean	isDestroyed() Determines whether this Cache instance has been destroyed.
Iterator<javax.cache.Cache.Entry<K,V>>	iterator(int fetchSize) Creates and returns a cluster wide iterator to iterate on all entries owned by this cache.
void	put(K key, V value, javax.cache.expiry.ExpiryPolicy expiryPolicy) Associates the specified value with the specified key in the cache using a custom ExpiryPolicy.
void	putAll(Map<? extends K,? extends V> map, javax.cache.expiry.ExpiryPolicy expiryPolicy) Copies all of the entries from the given map to the cache using a custom ExpiryPolicy.
CompletionStage<Void>	putAsync(K key, V value) Asynchronously associates the specified value with the specified key in the cache.
CompletionStage<Void>	putAsync(K key, V value, javax.cache.expiry.ExpiryPolicy expiryPolicy) Asynchronously associates the specified value with the specified key in the cache using a custom ExpiryPolicy.
boolean	putIfAbsent(K key, V value, javax.cache.expiry.ExpiryPolicy expiryPolicy) Associates the specified key with the given value if and only if there is not yet a mapping defined for the specified key.
CompletionStage<Boolean>	putIfAbsentAsync(K key, V value) Asynchronously associates the specified key with the given value if and only if there is not yet a mapping defined for the specified key.
CompletionStage<Boolean>	putIfAbsentAsync(K key, V value, javax.cache.expiry.ExpiryPolicy expiryPolicy) Asynchronously associates the specified key with the given value if and only if there is not yet a mapping defined for the specified key.
CompletionStage<Boolean>	removeAsync(K key) Asynchronously removes the mapping for a key from this cache if it is present.
CompletionStage<Boolean>	removeAsync(K key, V oldValue) Asynchronously removes the mapping for the given key if and only if the currently mapped value equals to the value of oldValue.
boolean	removePartitionLostListener(UUID id) Removes the specified cache partition lost listener.
boolean	replace(K key, V value, javax.cache.expiry.ExpiryPolicy expiryPolicy) Atomically replaces the assigned value of the given key by the specified value using a custom ExpiryPolicy.
boolean	replace(K key, V oldValue, V newValue, javax.cache.expiry.ExpiryPolicy expiryPolicy) Atomically replaces the currently assigned value for the given key with the specified newValue if and only if the currently assigned value equals the value of oldValue using a custom ExpiryPolicy.
CompletionStage<Boolean>	replaceAsync(K key, V value) Asynchronously replaces the assigned value of the given key by the specified value.
CompletionStage<Boolean>	replaceAsync(K key, V value, javax.cache.expiry.ExpiryPolicy expiryPolicy) Asynchronously replaces the assigned value of the given key by the specified value using a custom ExpiryPolicy.
CompletionStage<Boolean>	replaceAsync(K key, V oldValue, V newValue) Asynchronously replaces the currently assigned value for the given key with the specified newValue if and only if the currently assigned value equals the value of oldValue.
CompletionStage<Boolean>	replaceAsync(K key, V oldValue, V newValue, javax.cache.expiry.ExpiryPolicy expiryPolicy) Asynchronously replaces the currently assigned value for the given key with the specified newValue if and only if the currently assigned value equals the value of oldValue using a custom ExpiryPolicy.
boolean	setExpiryPolicy(K key, javax.cache.expiry.ExpiryPolicy expiryPolicy) Associates the specified key with the given ExpiryPolicy.
void	setExpiryPolicy(Set<? extends K> keys, javax.cache.expiry.ExpiryPolicy expiryPolicy) Associates the specified key with the given ExpiryPolicy.
int	size() Total entry count.

Methods inherited from interface javax.cache.Cache

clear, close, containsKey, deregisterCacheEntryListener, get, getAll, getAndPut, getAndRemove, getAndReplace, getCacheManager, getConfiguration, getName, invoke, invokeAll, isClosed, iterator, loadAll, put, putAll, putIfAbsent, registerCacheEntryListener, remove, remove, removeAll, removeAll, replace, replace, unwrap

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface com.hazelcast.core.PrefixedDistributedObject

getPrefixedName

Methods inherited from interface com.hazelcast.core.DistributedObject

getDestroyContextForTenant, getName, getPartitionKey, getServiceName

Method Detail

setExpiryPolicy

boolean setExpiryPolicy(K key,
                        javax.cache.expiry.ExpiryPolicy expiryPolicy)

Associates the specified key with the given ExpiryPolicy. expiryPolicy takes precedence for this particular key against any cache wide expiry policy. If key does not exist or is already expired, this call makes no changes to entries stored in this cache. Note: New time-to-live duration is calculated using newly added entry policy's getExpiryForUpdate method immediately after this operation succeeds.

Parameters:

key - The key that is associated with the specified expiry policy.

expiryPolicy - custom expiry policy for this operation

Returns:

true if the entry exists and its expiry policy is changed, false otherwise

Throws:

NullPointerException - if keys or expiryPolicy is null.

Since:

3.11

setExpiryPolicy

void setExpiryPolicy(Set<? extends K> keys,
                     javax.cache.expiry.ExpiryPolicy expiryPolicy)

Associates the specified key with the given ExpiryPolicy. expiryPolicy takes precedence for these particular keys against any cache wide expiry policy. If some keys in keys do not exist or are already expired, this call has no effect for those. Note: New time-to-live duration is calculated using newly added entry policy's getExpiryForUpdate method immediately after this operation succeeds.

Parameters:

keys - The keys that are associated with the specified expiry policy.

expiryPolicy - custom expiry policy for this operation

Throws:

NullPointerException - if keys or expiryPolicy is null.

Since:

3.11

getAsync

CompletionStage<V> getAsync(K key)

Asynchronously retrieves the mapped value of the given key using a custom ExpiryPolicy. If no mapping exists null is returned.

If the cache is configured for read-through operation mode, the underlying configured CacheLoader might be called to retrieve the value of the key from any kind of external resource.

The resulting CompletionStage instance may throw a ClassCastException as the operations result if the Cache is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

Parameters:

key - The key whose associated value is to be returned.

Returns:

CompletionStage retrieve the value assigned to the given key.

Throws:

NullPointerException - if given key is null

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed()

See Also:

Cache.get(Object)

getAsync

CompletionStage<V> getAsync(K key,
                            javax.cache.expiry.ExpiryPolicy expiryPolicy)

Asynchronously gets an entry from cache using a custom ExpiryPolicy.

If the cache is configured for read-through operation mode, the underlying configured CacheLoader might be called to retrieve the value of the key from any kind of external resource.

The resulting CompletionStage instance may throw a ClassCastException as the operations result if the Cache is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

Parameters:

key - The key whose associated value is to be returned.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to getAsync(Object).

Returns:

CompletionStage retrieve the value assigned to the given key.

Throws:

NullPointerException - if given key is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

See Also:

Cache.get(Object)

putAsync

CompletionStage<Void> putAsync(K key,
                               V value)

Asynchronously associates the specified value with the specified key in the cache.

In case a previous assignment already exists, the previous value is overridden by the new given value.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key whose associated value is to be returned.

value - The value to be associated with the specified key.

Returns:

CompletionStage notify when the operation succeeds.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.put(Object, Object)

putAsync

CompletionStage<Void> putAsync(K key,
                               V value,
                               javax.cache.expiry.ExpiryPolicy expiryPolicy)

Asynchronously associates the specified value with the specified key in the cache using a custom ExpiryPolicy.

In case a previous assignment already exists, the previous value is overridden by the new given value.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key whose associated value is to be returned.

value - The value to be associated with the specified key.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to putAsync(Object, Object).

Returns:

CompletionStage notify when the operation succeeds.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.put(Object, Object)

putIfAbsentAsync

CompletionStage<Boolean> putIfAbsentAsync(K key,
                                          V value)

Asynchronously associates the specified key with the given value if and only if there is not yet a mapping defined for the specified key.

This is equivalent to:

   if (!cache.containsKey(key)) {}
     cache.put(key, value);
     return true;
   } else {
     return false;
   }
 

except that the action is performed atomically.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key that is associated with the specified value.

value - The value to which the specified key is associated.

Returns:

CompletionStage notify if a previous value was assigned with the key

Throws:

NullPointerException - if the given key or value is null

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed()

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache

See Also:

Cache.putIfAbsent(Object, Object)

putIfAbsentAsync

CompletionStage<Boolean> putIfAbsentAsync(K key,
                                          V value,
                                          javax.cache.expiry.ExpiryPolicy expiryPolicy)

Asynchronously associates the specified key with the given value if and only if there is not yet a mapping defined for the specified key. using a custom ExpiryPolicy.

This is equivalent to:

   if (!cache.containsKey(key)) {}
     cache.put(key, value);
     return true;
   } else {
     return false;
   }
 

except that the action is performed atomically.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key that is associated with the specified value.

value - The value to which the specified key is associated.

expiryPolicy - custom expiry policy for this operation, a null value is equivalent to putIfAbsentAsync(Object, Object)

Returns:

CompletionStage notify if a previous value was assigned with the key

Throws:

NullPointerException - if the given key or value is null

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed()

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache

See Also:

Cache.putIfAbsent(Object, Object)

getAndPutAsync

CompletionStage<V> getAndPutAsync(K key,
                                  V value)

Asynchronously associates the specified value with the specified key in this cache, returning an existing value if one existed.

In case a previous assignment already exists, the previous value is overridden by the new given value and the previous value is returned to the caller. This is equivalent to the Map.put(Object, Object) operation.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key whose associated value is to be returned.

value - The value that is associated with the specified key.

Returns:

CompletionStage retrieve a possible previously assigned value for the given key.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.getAndPut(Object, Object)

getAndPutAsync

CompletionStage<V> getAndPutAsync(K key,
                                  V value,
                                  javax.cache.expiry.ExpiryPolicy expiryPolicy)

Asynchronously associates the specified value with the specified key in this cache, returning an existing value if one existed using a custom ExpiryPolicy.

In case a previous assignment already exists, the previous value is overridden by the new given value and the previous value is returned to the caller. This is equivalent to the Map.put(Object, Object) operation.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key whose associated value is to be returned.

value - The value to associate with the specified key.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to getAndPutAsync(Object, Object).

Returns:

CompletionStage retrieve a possible previously assigned value for the given key.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.getAndPut(Object, Object)

removeAsync

CompletionStage<Boolean> removeAsync(K key)

Asynchronously removes the mapping for a key from this cache if it is present.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

The resulting CompletionStage instance may throw a ClassCastException as the operations result if the Cache is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

Parameters:

key - The key whose mapping is to be removed.

Returns:

CompletionStage notify if mapping could be removed or not.

Throws:

NullPointerException - if the given key is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

See Also:

Cache.remove(Object)

removeAsync

CompletionStage<Boolean> removeAsync(K key,
                                     V oldValue)

Asynchronously removes the mapping for the given key if and only if the currently mapped value equals to the value of oldValue.

This is equivalent to:

   if (cache.containsKey(key) && equals(cache.get(key), oldValue) {
     cache.remove(key);
     return true;
   } else {
     return false;
   }
 

except that the action is performed atomically.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

The resulting CompletionStage instance may throw a ClassCastException as the operations result if the Cache is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

Parameters:

key - The key whose mapping is to be removed if the mapped value is oldValue.

oldValue - The value expected to be associated with the specified key.

Returns:

CompletionStage notify if mapping could be removed or not.

Throws:

NullPointerException - if the given key or oldValue is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

See Also:

Cache.remove(Object, Object)

getAndRemoveAsync

CompletionStage<V> getAndRemoveAsync(K key)

Asynchronously removes the entry for a key and returns the previously assigned value or null if no value was assigned.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

The resulting CompletionStage instance may throw a ClassCastException as the operations result if the Cache is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

Parameters:

key - The key to be removed and whose associated value is to be returned.

Returns:

CompletionStage retrieve a possible previously assigned value for the removed key.

Throws:

NullPointerException - if the given key is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

See Also:

Cache.getAndRemove(Object)

replaceAsync

CompletionStage<Boolean> replaceAsync(K key,
                                      V value)

Asynchronously replaces the assigned value of the given key by the specified value.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key whose associated value is to be replaced.

value - The new value to be associated with the specified key.

Returns:

CompletionStage notify if the operation succeeds or not.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.replace(Object, Object)

replaceAsync

CompletionStage<Boolean> replaceAsync(K key,
                                      V value,
                                      javax.cache.expiry.ExpiryPolicy expiryPolicy)

Asynchronously replaces the assigned value of the given key by the specified value using a custom ExpiryPolicy.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key whose assigned value is replaced by the specified value.

value - The specified value to be associated with the given key.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to replaceAsync(Object, Object)

Returns:

CompletionStage notify if the operation succeeds or not.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.replace(Object, Object)

replaceAsync

CompletionStage<Boolean> replaceAsync(K key,
                                      V oldValue,
                                      V newValue)

Asynchronously replaces the currently assigned value for the given key with the specified newValue if and only if the currently assigned value equals the value of oldValue.

This is equivalent to:

   if (cache.containsKey(key) && equals(cache.get(key), oldValue) {
     cache.put(key, newValue);
     return true;
   } else {
     return false;
   }
 

except that the action is performed atomically.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

The resulting CompletionStage instance may throw a ClassCastException as the operations result if the Cache is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

Parameters:

key - The key that will have its assigned value replaced.

oldValue - The old value expected to be associated with the specified key.

newValue - The new value to be associated with the specified key.

Returns:

CompletionStage notify if the operation succeeds or not.

Throws:

NullPointerException - if the given key, oldValue or newValue is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed()

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache

See Also:

Cache.replace(Object, Object, Object)

replaceAsync

CompletionStage<Boolean> replaceAsync(K key,
                                      V oldValue,
                                      V newValue,
                                      javax.cache.expiry.ExpiryPolicy expiryPolicy)

Asynchronously replaces the currently assigned value for the given key with the specified newValue if and only if the currently assigned value equals the value of oldValue using a custom ExpiryPolicy.

This is equivalent to:

   if (cache.containsKey(key) && equals(cache.get(key), oldValue) {
     cache.put(key, newValue);
     return true;
   } else {
     return false;
   }
 

except that the action is performed atomically.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

The resulting CompletionStage instance may throw a ClassCastException as the operations result if the Cache is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

Parameters:

key - The key that will have its assigned value replaced.

oldValue - The old value expected to be associated with the specified key.

newValue - The new value to be associated with the specified key.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to replaceAsync(Object, Object, Object).

Returns:

CompletionStage to get notified if the operation succeed or not.

Throws:

NullPointerException - if the given key, oldValue or newValue is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.replace(Object, Object, Object)

getAndReplaceAsync

CompletionStage<V> getAndReplaceAsync(K key,
                                      V value)

Asynchronously replaces the assigned value of the given key by the specified value and returns the previously assigned value.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key whose value is replaced.

value - The new value to be associated with the specified key.

Returns:

CompletionStage to retrieve a possible previously assigned value for the given key.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.getAndReplace(Object, Object)

getAndReplaceAsync

CompletionStage<V> getAndReplaceAsync(K key,
                                      V value,
                                      javax.cache.expiry.ExpiryPolicy expiryPolicy)

Asynchronously replaces the assigned value of the given key by the specified value using a custom ExpiryPolicy and returns the previously assigned value.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key whose value is replaced.

value - The new value to be associated with the specified key.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to Cache.getAndReplace(Object, Object)

Returns:

CompletionStage to retrieve a possible previously assigned value for the given key.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.getAndReplace(Object, Object)

get

V get(K key,
      javax.cache.expiry.ExpiryPolicy expiryPolicy)

Retrieves the mapped value of the given key using a custom ExpiryPolicy. If no mapping exists null is returned.

If the cache is configured for read-through operation mode, the underlying configured CacheLoader might be called to retrieve the value of the key from any kind of external resource.

Parameters:

key - The key whose mapped value is to be returned.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to Cache.get(Object).

Returns:

The value assigned to the given key, or null if not assigned.

Throws:

NullPointerException - if the given key is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache

See Also:

Cache.get(Object)

getAll

Map<K,V> getAll(Set<? extends K> keys,
                javax.cache.expiry.ExpiryPolicy expiryPolicy)

Gets a collection of entries from the cache with custom expiry policy, returning them as Map of the values associated with the set of keys requested.

If the cache is configured for read-through operation mode, the underlying configured CacheLoader might be called to retrieve the values of the keys from any kind of external resource.

Parameters:

keys - The keys whose associated values are to be returned.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to Cache.getAll(java.util.Set).

Returns:

A map of entries that were found for the given keys. Keys not found in the cache are not in the returned map.

Throws:

NullPointerException - if the given keys are null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed()

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.getAll(java.util.Set)

put

void put(K key,
         V value,
         javax.cache.expiry.ExpiryPolicy expiryPolicy)

Associates the specified value with the specified key in the cache using a custom ExpiryPolicy.

Parameters:

key - The key that has the specified value associated with it.

value - The value to be associated with the key.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to Cache.put(Object, Object).

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.put(Object, Object)

getAndPut

V getAndPut(K key,
            V value,
            javax.cache.expiry.ExpiryPolicy expiryPolicy)

Associates the specified value with the specified key in this cache using a custom ExpiryPolicy, returning an existing value if one existed.

Parameters:

key - The key that has the specified value associated with it.

value - The value to be associated with the key.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to Cache.getAndPut(Object, Object).

Returns:

The value previously assigned to the given key, or null if not assigned.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.getAndPut(Object, Object)

putAll

void putAll(Map<? extends K,? extends V> map,
            javax.cache.expiry.ExpiryPolicy expiryPolicy)

Copies all of the entries from the given map to the cache using a custom ExpiryPolicy.

Puts of single entries happen atomically but there is no transactional guarantee over the complete putAll operation. If other concurrent operations modify or remove all or single values of the provided map, the result is undefined.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the values of the keys to any kind of external resource.

Parameters:

map - The mappings to be stored in this cache.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to Cache.putAll(java.util.Map).

Throws:

NullPointerException - if the given map is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.putAll(java.util.Map)

putIfAbsent

boolean putIfAbsent(K key,
                    V value,
                    javax.cache.expiry.ExpiryPolicy expiryPolicy)

Associates the specified key with the given value if and only if there is not yet a mapping defined for the specified key.

This is equivalent to:

   if (!cache.containsKey(key)) {}
     cache.put(key, value);
     return true;
   } else {
     return false;
   }
 

except that the action is performed atomically.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key that is associated with the specified value.

value - The value that has the specified key associated with it.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to Cache.putIfAbsent(Object, Object).

Returns:

true if a value was set, false otherwise.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.putIfAbsent(Object, Object)

replace

boolean replace(K key,
                V oldValue,
                V newValue,
                javax.cache.expiry.ExpiryPolicy expiryPolicy)

Atomically replaces the currently assigned value for the given key with the specified newValue if and only if the currently assigned value equals the value of oldValue using a custom ExpiryPolicy.

This is equivalent to:

   if (cache.containsKey(key) && equals(cache.get(key), oldValue) {
     cache.put(key, newValue);
     return true;
   } else {
     return false;
   }
 

except that the action is performed atomically.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key with the value to be replaced.

oldValue - The old value expected to be associated with the specified key.

newValue - The new value to be associated with the specified key.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to Cache.replace(Object, Object, Object).

Returns:

true if a value was replaced, false otherwise.

Throws:

NullPointerException - if given key, oldValue or newValue is null

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.replace(Object, Object, Object)

replace

boolean replace(K key,
                V value,
                javax.cache.expiry.ExpiryPolicy expiryPolicy)

Atomically replaces the assigned value of the given key by the specified value using a custom ExpiryPolicy.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key whose value is replaced.

value - The new value to be associated with the specified key.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to Cache.replace(Object, Object)

Returns:

true if a value was replaced, false otherwise.

Throws:

NullPointerException - if the given key, oldValue or newValue is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.replace(Object, Object)

getAndReplace

V getAndReplace(K key,
                V value,
                javax.cache.expiry.ExpiryPolicy expiryPolicy)

Atomically replaces the assigned value of the given key by the specified value using a custom ExpiryPolicy and returns the previously assigned value.

If the cache is configured for write-through operation mode, the underlying configured CacheWriter might be called to store the value of the key to any kind of external resource.

Parameters:

key - The key whose value is replaced.

value - The new value to be associated with the specified key.

expiryPolicy - The custom expiry policy for this operation, a null value is equivalent to Cache.getAndReplace(Object, Object).

Returns:

The old value previously assigned to the given key.

Throws:

NullPointerException - if the given key or value is null.

javax.cache.CacheException - if any exception happens while invoking the request, other exceptions are wrapped.

IllegalStateException - if the cache is Cache.isClosed().

ClassCastException - if the implementation is configured to perform runtime-type-checking, and the key or value types are incompatible with those that have been configured for the Cache.

See Also:

Cache.getAndReplace(Object, Object)

size

int size()

Total entry count. If the cache contains more than Integer.MAX_VALUE elements, returns Integer.MAX_VALUE.

Returns:

total entry count

destroy

void destroy()

Closes the cache. Clears the internal content and releases any resource.

Specified by:

destroy in interface DistributedObject

See Also:

CacheManager.destroyCache(String)

isDestroyed

boolean isDestroyed()

Determines whether this Cache instance has been destroyed.

Returns:

true if this Cache instance is destroyed; false if it is still open.

getLocalCacheStatistics

CacheStatistics getLocalCacheStatistics()

Directly access local Cache Statistics.

Returns:

CacheStatistics instance or an empty statistics if not enabled.

addPartitionLostListener

UUID addPartitionLostListener(com.hazelcast.cache.impl.event.CachePartitionLostListener listener)

Adds a CachePartitionLostListener.

The addPartitionLostListener returns a registration ID. This ID is needed to remove the CachePartitionLostListener using the removePartitionLostListener(UUID) method.

There is no check for duplicate registrations, so if you register the listener twice, it will get events twice. IMPORTANT: Please @see com.hazelcast.partition.PartitionLostListener for weaknesses. IMPORTANT: Listeners registered from HazelcastClient may miss some of the cache partition lost events due to design limitations.

Parameters:

listener - the added CachePartitionLostListener.

Returns:

returns the registration ID for the CachePartitionLostListener.

Throws:

NullPointerException - if listener is null.

See Also:

removePartitionLostListener(UUID)

removePartitionLostListener

boolean removePartitionLostListener(UUID id)

Removes the specified cache partition lost listener. Returns silently if there is no such listener added before.

Parameters:

id - ID of registered listener.

Returns:

true if registration is removed, false otherwise.

Throws:

NullPointerException - if the given ID is null.

iterator

Iterator<javax.cache.Cache.Entry<K,V>> iterator(int fetchSize)

Creates and returns a cluster wide iterator to iterate on all entries owned by this cache.

The ordering of iteration over entries is undefined.

During iteration, any entries that are:

• read will have their appropriate CacheEntryReadListeners notified.
• removed will have their appropriate CacheEntryRemoveListeners notified.

Iterator.next() may return null if the entry is no longer present, has expired or has been evicted.

Parameters:

fetchSize - size for fetching keys in bulk. This size can be thought of as page size for iteration. But notice that at every fetch, only keys are retrieved, not values. Values are retrieved on each iterate.

Throws:

IllegalStateException - if the cache is Cache.isClosed()

See Also:

Cache.iterator()