Package net.sf.ehcache.constructs.classloader

Class ClassLoaderAwareCache

  • All Implemented Interfaces:
    java.lang.Cloneable, Ehcache
    Direct Known Subclasses:
    InternalClassLoaderAwareCache
    public class ClassLoaderAwareCache
extends java.lang.Object
implements Ehcache
    A cache decorator that adjusts the Thread context classloader (TCCL) for every cache operation. The TCCL is reset to its original value when the method is complete
    Author:
    teck

    • Field Detail

      • classLoader

        protected final java.lang.ClassLoader classLoader
        Used by InternalClassLoaderAwareCache

      • cache

        protected final Ehcache cache
        Used by InternalClassLoaderAwareCache

    • Constructor Detail

      • ClassLoaderAwareCache

        public ClassLoaderAwareCache​(Ehcache cache,
                             java.lang.ClassLoader classLoader)
        Constructor
        Parameters:
        cache - wrapped cache
        classLoader - loader to set Thread context loader to for duration of cache opeartion

    • Method Detail

      • main

        public static void main​(java.lang.String[] args)
        Generator for the method bodies
        Parameters:
        args -

      • putQuiet

        public void putQuiet​(Element arg0)
              throws java.lang.IllegalArgumentException,
                     java.lang.IllegalStateException,
                     CacheException
        Put an element in the cache, without updating statistics, or updating listeners. This is meant to be used in conjunction with Ehcache.getQuiet(java.io.Serializable)
        Specified by:
        putQuiet in interface Ehcache
        Parameters:
        arg0 - An object. If Serializable it can fully participate in replication and the DiskStore.
        Throws:
        java.lang.IllegalArgumentException - if the element is null
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException

      • putWithWriter

        public void putWithWriter​(Element arg0)
                   throws java.lang.IllegalArgumentException,
                          java.lang.IllegalStateException,
                          CacheException
        Put an element in the cache writing through a CacheWriter. If no CacheWriter has been registered for the cache, then this method throws an exception.

        Resets the access statistics on the element, which would be the case if it has previously been gotten from a cache, and is now being put back.

        Also notifies the CacheEventListener, if the writer operation succeeds, that:

        • the element was put, but only if the Element was actually put.
        • if the element exists in the cache, that an update has occurred, even if the element would be expired if it was requested
        Specified by:
        putWithWriter in interface Ehcache
        Parameters:
        arg0 - An object. If Serializable it can fully participate in replication and the DiskStore.
        Throws:
        java.lang.IllegalArgumentException - if the element is null
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException - if no CacheWriter was registered

      • getAll

        public java.util.Map getAll​(java.util.Collection arg0)
                     throws java.lang.IllegalStateException,
                            CacheException,
                            java.lang.NullPointerException
        Gets all the elements from the cache for the keys provided. Updates Element Statistics Throws a NullPointerException if any key in the collection is null

        Note that the Element's lastAccessTime is always the time of this get. Use Ehcache.getQuiet(Object) to peek into the Element to see its last access time with get

        Specified by:
        getAll in interface Ehcache
        Parameters:
        arg0 - a collection of keys for which value is to be fetched
        Returns:
        Map of key and elements for the provided keys, value will be null for the keys which do not exist
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        java.lang.NullPointerException - if any key is null in the collection
        CacheException
        See Also:
        Ehcache.isExpired(net.sf.ehcache.Element)

      • getKeysWithExpiryCheck

        public java.util.List getKeysWithExpiryCheck()
                                      throws java.lang.IllegalStateException,
                                             CacheException
        Returns a list of all elements in the cache. Only keys of non-expired elements are returned.

        The returned keys are unique and can be considered a set.

        The List returned is not live. It is a copy.

        For large caches - or caches with high-latency storage this method can take a very long time to complete. You should seriously consider whether your usage requires checking for expired keys before choosing to call this method. As this method can take a long time the results may also be significantly out of date by the time the method returns.

        Specified by:
        getKeysWithExpiryCheck in interface Ehcache
        Returns:
        a list of Object keys
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException

      • getKeysNoDuplicateCheck

        public java.util.List getKeysNoDuplicateCheck()
                                       throws java.lang.IllegalStateException
        Returns a list of all elements in the cache, whether or not they are expired.

        The returned keys are not unique and may contain duplicates. If the cache is only using the memory store, the list will be unique. If the disk store is being used as well, it will likely contain duplicates, because of the internal store design.

        The List returned is not live. It is a copy.

        The time taken is O(log n). On a single cpu 1.8Ghz P4, approximately 6ms is required for 1000 entries and 36 for 50000.

        This is the fastest getKeys method

        Specified by:
        getKeysNoDuplicateCheck in interface Ehcache
        Returns:
        a list of Object keys
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • removeQuiet

        public boolean removeQuiet​(java.io.Serializable arg0)
                    throws java.lang.IllegalStateException
        Removes an Element from the Cache, without notifying listeners. This also removes it from any stores it may be in.

        Specified by:
        removeQuiet in interface Ehcache
        Parameters:
        arg0 - of the element to remove
        Returns:
        true if the element was removed, false if it was not found in the cache
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • removeQuiet

        public boolean removeQuiet​(java.lang.Object arg0)
                    throws java.lang.IllegalStateException
        Removes an Element from the Cache, without notifying listeners. This also removes it from any stores it may be in.
        Specified by:
        removeQuiet in interface Ehcache
        Parameters:
        arg0 - of the element to remove
        Returns:
        true if the element was removed, false if it was not found in the cache
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • removeWithWriter

        public boolean removeWithWriter​(java.lang.Object arg0)
                         throws java.lang.IllegalStateException,
                                CacheException
        Removes an Element from the Cache and any stores it might be in. This also removes through to a CacheWriter. If no CacheWriter has been registered for the cache, then this method throws an exception.

        Also notifies the CacheEventListener after the element was removed, but only if an Element with the key actually existed.

        Specified by:
        removeWithWriter in interface Ehcache
        Parameters:
        arg0 - of the element to remove
        Returns:
        true if the element was removed, false if it was not found in the cache
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException - if no CacheWriter was registered

      • calculateInMemorySize

        @Deprecated
public long calculateInMemorySize()
                           throws java.lang.IllegalStateException,
                                  CacheException
        Deprecated.
        Gets the size of the memory store for this cache

        Warning: This method can be very expensive to run. Allow approximately 1 second per 1MB of entries. Running this method could create liveness problems because the object lock is held for a long period

        Specified by:
        calculateInMemorySize in interface Ehcache
        Returns:
        the approximate size of the memory store in bytes
        Throws:
        java.lang.IllegalStateException
        CacheException

      • calculateOffHeapSize

        @Deprecated
public long calculateOffHeapSize()
                          throws java.lang.IllegalStateException,
                                 CacheException
        Deprecated.
        Gets the size of the off-heap store for this cache
        Specified by:
        calculateOffHeapSize in interface Ehcache
        Returns:
        the size of the off-heap store in bytes
        Throws:
        java.lang.IllegalStateException
        CacheException

      • calculateOnDiskSize

        @Deprecated
public long calculateOnDiskSize()
                         throws java.lang.IllegalStateException,
                                CacheException
        Deprecated.
        Gets the size of the on-disk store for this cache
        Specified by:
        calculateOnDiskSize in interface Ehcache
        Returns:
        the size of the on-disk store in bytes
        Throws:
        java.lang.IllegalStateException
        CacheException

      • hasAbortedSizeOf

        public boolean hasAbortedSizeOf()
        Check if the cache may contain elements which the SizeOf engine could not fully size.
        Specified by:
        hasAbortedSizeOf in interface Ehcache
        Returns:
        true if the cache may contain partially sized objects

      • getMemoryStoreSize

        @Deprecated
public long getMemoryStoreSize()
                        throws java.lang.IllegalStateException
        Deprecated.
        Returns the number of elements in the memory store.
        Specified by:
        getMemoryStoreSize in interface Ehcache
        Returns:
        the number of elements in the memory store
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • getOffHeapStoreSize

        @Deprecated
public long getOffHeapStoreSize()
                         throws java.lang.IllegalStateException
        Deprecated.
        Returns the number of elements in the off-heap store.
        Specified by:
        getOffHeapStoreSize in interface Ehcache
        Returns:
        the number of elements in the off-heap store
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • getDiskStoreSize

        @Deprecated
public int getDiskStoreSize()
                     throws java.lang.IllegalStateException
        Deprecated.
        Returns the number of elements in the disk store.
        Specified by:
        getDiskStoreSize in interface Ehcache
        Returns:
        the number of elements in the disk store.
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • isExpired

        public boolean isExpired​(Element arg0)
                  throws java.lang.IllegalStateException,
                         java.lang.NullPointerException
        Checks whether this cache element has expired.

        The element is expired if:

        1. the idle time is non-zero and has elapsed, unless the cache is eternal; or
        2. the time to live is non-zero and has elapsed, unless the cache is eternal; or
        3. the value of the element is null.
        Specified by:
        isExpired in interface Ehcache
        Parameters:
        arg0 - the element to check
        Returns:
        true if it has expired
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        java.lang.NullPointerException - if the element is null

      • isElementInMemory

        public boolean isElementInMemory​(java.lang.Object arg0)
        Whether an Element is stored in the cache in Memory, indicating a very low cost of retrieval.

        Since no assertions are made about the state of the Element it is possible that the Element is expired, but this method still returns true.

        Specified by:
        isElementInMemory in interface Ehcache
        Parameters:
        arg0 - the key of the element to remove
        Returns:
        true if an element matching the key is found in memory

      • isElementInMemory

        public boolean isElementInMemory​(java.io.Serializable arg0)
        Whether an Element is stored in the cache in Memory, indicating a very low cost of retrieval.

        Since no assertions are made about the state of the Element it is possible that the Element is expired, but this method still returns true.

        Specified by:
        isElementInMemory in interface Ehcache
        Parameters:
        arg0 - the key of the element to remove
        Returns:
        true if an element matching the key is found in memory

      • isElementOnDisk

        public boolean isElementOnDisk​(java.lang.Object arg0)
        Whether an Element is stored in the cache on Disk, indicating a higher cost of retrieval.

        Since no assertions are made about the state of the Element it is possible that the Element is expired, but this method still returns true.

        Specified by:
        isElementOnDisk in interface Ehcache
        Parameters:
        arg0 - the key of the element to remove
        Returns:
        true if an element matching the key is found in the diskStore

      • isElementOnDisk

        public boolean isElementOnDisk​(java.io.Serializable arg0)
        Whether an Element is stored in the cache on Disk, indicating a higher cost of retrieval.

        Since no assertions are made about the state of the Element it is possible that the Element is expired, but this method still returns true.

        Specified by:
        isElementOnDisk in interface Ehcache
        Parameters:
        arg0 - the key of the element to remove
        Returns:
        true if an element matching the key is found in the diskStore

      • getGuid

        public java.lang.String getGuid()
        The GUID for this cache instance can be used to determine whether two cache instance references are pointing to the same cache.
        Specified by:
        getGuid in interface Ehcache
        Returns:
        the globally unique identifier for this cache instance. This is guaranteed to be unique.

      • getCacheManager

        public CacheManager getCacheManager()
        Gets the CacheManager managing this cache. For a newly created cache this will be null until it has been added to a CacheManager.
        Specified by:
        getCacheManager in interface Ehcache
        Returns:
        the manager or null if there is none

      • evictExpiredElements

        public void evictExpiredElements()
        Causes all elements stored in the Cache to be synchronously checked for expiry, and if expired, evicted.

        For large caches - or caches with high-latency storage this method can take a very long time to complete. You should seriously consider relying on some form of capacity eviction to control cache capacity over calling this method. As this method can take a long time the cache may not be fully purged of expired elements on return, since more elements may have expired during the call.

        Specified by:
        evictExpiredElements in interface Ehcache

      • isKeyInCache

        public boolean isKeyInCache​(java.lang.Object arg0)
        An inexpensive check to see if the key exists in the cache.

        Since no assertions are made about the state of the Element it is possible that the Element is expired, but this method still returns true.

        Specified by:
        isKeyInCache in interface Ehcache
        Parameters:
        arg0 - the key to check for
        Returns:
        true if an Element matching the key is found in the cache. No assertions are made about the state of the Element.

      • isValueInCache

        public boolean isValueInCache​(java.lang.Object arg0)
        An extremely expensive check to see if the value exists in the cache.
        Specified by:
        isValueInCache in interface Ehcache
        Parameters:
        arg0 - to check for
        Returns:
        true if an Element matching the key is found in the cache. No assertions are made about the state of the Element.

      • getStatistics

        public StatisticsGateway getStatistics()
                                throws java.lang.IllegalStateException
        Gets an immutable Statistics object representing the Cache statistics at the time.
        Specified by:
        getStatistics in interface Ehcache
        Returns:
        the statistics gateway
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • setCacheManager

        public void setCacheManager​(CacheManager arg0)
        Sets the CacheManager
        Specified by:
        setCacheManager in interface Ehcache
        Parameters:
        arg0 - the CacheManager for this cache to use.

      • getBootstrapCacheLoader

        public BootstrapCacheLoader getBootstrapCacheLoader()
        Accessor for the BootstrapCacheLoader associated with this cache. For testing purposes.
        Specified by:
        getBootstrapCacheLoader in interface Ehcache
        Returns:
        the BootstrapCacheLoader to use

      • initialise

        public void initialise()
        Newly created caches do not have a MemoryStore or a DiskStore.

        This method creates those and makes the cache ready to accept elements

        This method is not intended to be called explicitly, but rather is called implicitly by the cache's CacheManager instance during the cache initialization. Invoking this method directly will likely lead to breaking.

        Specified by:
        initialise in interface Ehcache

      • bootstrap

        public void bootstrap()
        Bootstrap command. This must be called after the Cache is intialised, during CacheManager initialisation. If loads are synchronous, they will complete before the CacheManager initialise completes, otherwise they will happen in the background.

        This method is not intended to be called explicitly, but rather is called implicitly by the cache's CacheManager instance during the cache initialization. Invoking this method directly will likely lead to breaking.

        Specified by:
        bootstrap in interface Ehcache

      • getCacheConfiguration

        public CacheConfiguration getCacheConfiguration()
        Gets the cache configuration this cache was created with.

        Things like listeners that are added dynamically are excluded.

        Specified by:
        getCacheConfiguration in interface Ehcache
        Returns:
        CacheConfiguration the cache configuration

      • registerCacheExtension

        public void registerCacheExtension​(CacheExtension arg0)
        Register a CacheExtension with the cache. It will then be tied into the cache lifecycle.

        If the CacheExtension is not initialised, initialise it.

        Specified by:
        registerCacheExtension in interface Ehcache
        Parameters:
        arg0 - the cache extension

      • getRegisteredCacheExtensions

        public java.util.List getRegisteredCacheExtensions()
        Specified by:
        getRegisteredCacheExtensions in interface Ehcache
        Returns:
        the cache extensions as a live list

      • setCacheExceptionHandler

        public void setCacheExceptionHandler​(CacheExceptionHandler arg0)
        Sets an ExceptionHandler on the Cache. If one is already set, it is overwritten.
        Specified by:
        setCacheExceptionHandler in interface Ehcache
        Parameters:
        arg0 - the cache exception handler

      • registerCacheLoader

        public void registerCacheLoader​(CacheLoader arg0)
        Register a CacheLoader with the cache. It will then be tied into the cache lifecycle.

        The CacheLoader instance will be initialized when the cache itself is being initialized. Should the cache already be initialized, CacheLoader.init() will not be invoked. If the loader requires initialization, the user will have to call it manually before registering it with a Cache instance that's already alive

        Specified by:
        registerCacheLoader in interface Ehcache
        Parameters:
        arg0 - A Cache Loader to register

      • unregisterCacheLoader

        public void unregisterCacheLoader​(CacheLoader arg0)
        Unregister a CacheLoader with the cache. It will then be detached from the cache lifecycle.
        Specified by:
        unregisterCacheLoader in interface Ehcache
        Parameters:
        arg0 - A Cache Loader to unregister

      • getRegisteredCacheLoaders

        public java.util.List getRegisteredCacheLoaders()
        Specified by:
        getRegisteredCacheLoaders in interface Ehcache
        Returns:
        the cache loaders as a live list

      • registerCacheWriter

        public void registerCacheWriter​(CacheWriter arg0)
        Register the CacheWriter for this cache. It will then be tied into the cache lifecycle.

        If the CacheWriter is not initialised, initialise it.

        Specified by:
        registerCacheWriter in interface Ehcache
        Parameters:
        arg0 - A CacheWriter to register

      • registerDynamicAttributesExtractor

        public void registerDynamicAttributesExtractor​(DynamicAttributesExtractor extractor)
        Allows user to register a dynamic attribute extractor with a searchable cache that is dynamically indexable, as indicated by its configuration. Calling this method on such a cache is optional, but doing so more than once replaces previously registered extractor with the given one; i.e., there can be at most one extractor instance configured for each such cache. If the cache was not configured for dynamic indexing, an exception will be thrown
        Specified by:
        registerDynamicAttributesExtractor in interface Ehcache
        Parameters:
        extractor - the dynamic attribute extractor

      • unregisterCacheWriter

        public void unregisterCacheWriter()
        Unregister the CacheWriter from the cache. It will then be detached from the cache lifecycle.

        If not CacheWriter was registered beforehand this operation has no effect.

        Specified by:
        unregisterCacheWriter in interface Ehcache

      • getRegisteredCacheWriter

        public CacheWriter getRegisteredCacheWriter()
        Retrieves the CacheWriter that was registered for this cache.
        Specified by:
        getRegisteredCacheWriter in interface Ehcache
        Returns:
        the registered CacheWriter; or null if none was registered before

      • getWithLoader

        public Element getWithLoader​(java.lang.Object arg0,
                             CacheLoader arg1,
                             java.lang.Object arg2)
                      throws CacheException
        This method will return, from the cache, the object associated with the argument "key".

        If the object is not in the cache, the associated cache loader will be called. That is either the CacheLoader passed in, or if null, the one associated with the cache. If both are null, no load is performed and null is returned.

        Because this method may take a long time to complete, it is not synchronized. The underlying cache operations are synchronized.

        Specified by:
        getWithLoader in interface Ehcache
        Parameters:
        arg0 - key whose associated value is to be returned.
        arg1 - the override loader to use. If null, the cache's default loader will be used
        arg2 - an argument to pass to the CacheLoader.
        Returns:
        an element if it existed or could be loaded, otherwise null
        Throws:
        CacheException - a runtime cache exception

      • getAllWithLoader

        public java.util.Map getAllWithLoader​(java.util.Collection arg0,
                                      java.lang.Object arg1)
                               throws CacheException
        The getAll method will return, from the cache, a Map of the objects associated with the Collection of keys in argument "keys". If the objects are not in the cache, the associated cache loader will be called. If no loader is associated with an object, a null is returned. If a problem is encountered during the retrieving or loading of the objects, an exception will be thrown. If the "arg" argument is set, the arg object will be passed to the CacheLoader.loadAll method. The cache will not dereference the object. If no "arg" value is provided a null will be passed to the loadAll method. The storing of null values in the cache is permitted, however, the get method will not distinguish returning a null stored in the cache and not finding the object in the cache. In both cases a null is returned.

        Note. If the getAll exceeds the maximum cache size, the returned map will necessarily be less than the number specified.

        Because this method may take a long time to complete, it is not synchronized. The underlying cache operations are synchronized.

        The constructs package provides similar functionality using the decorator SelfPopulatingCache

        Specified by:
        getAllWithLoader in interface Ehcache
        Parameters:
        arg0 - a collection of keys to be returned/loaded
        arg1 - an argument to pass to the CacheLoader.
        Returns:
        a Map populated from the Cache. If there are no elements, an empty Map is returned.
        Throws:
        CacheException - a runtime cache exception

      • isDisabled

        public boolean isDisabled()
        Whether this cache is disabled. "Disabled" means:
        1. bootstrap is disabled
        2. puts are discarded
        3. putQuites are discarded
        In all other respects the cache continues as it is.

        You can disable and enable a cache programmatically through the Ehcache.setDisabled(boolean) method.

        Specified by:
        isDisabled in interface Ehcache
        Returns:
        true if the cache is disabled.

      • setDisabled

        public void setDisabled​(boolean arg0)
        Disables or enables this cache. This call overrides the previous value of disabled.
        Specified by:
        setDisabled in interface Ehcache
        Parameters:
        arg0 - true if you wish to disable, false to enable
        See Also:
        Ehcache.isDisabled()

      • getInternalContext

        public java.lang.Object getInternalContext()
        This should not be used
        Specified by:
        getInternalContext in interface Ehcache
        Returns:
        some internal context (generally will be null)

      • disableDynamicFeatures

        public void disableDynamicFeatures()
        Disables dynamic configuration and disable/enable for this cache.

        This is a one time operation. Once an Ehcache instance has had its dynamic operations disabled they cannot be re-enabled.

        Specified by:
        disableDynamicFeatures in interface Ehcache

      • getWriterManager

        public CacheWriterManager getWriterManager()
        Obtain the writer manager that's used by this cache instance.
        Specified by:
        getWriterManager in interface Ehcache
        Returns:
        the writer manager that's set up for this cache

      • isClusterCoherent

        public boolean isClusterCoherent()
                          throws TerracottaNotRunningException
        Returns true if the cache is in coherent mode cluster-wide. Returns false otherwise.

        It applies to coherent clustering mechanisms only e.g. Terracotta

        Specified by:
        isClusterCoherent in interface Ehcache
        Returns:
        true if the cache is in coherent mode cluster-wide, false otherwise
        Throws:
        TerracottaNotRunningException

      • isNodeCoherent

        public boolean isNodeCoherent()
                       throws TerracottaNotRunningException
        Returns true if the cache is in coherent mode for the current node. Returns false otherwise.

        It applies to coherent clustering mechanisms only e.g. Terracotta

        Specified by:
        isNodeCoherent in interface Ehcache
        Returns:
        true if the cache is in coherent mode cluster-wide, false otherwise
        Throws:
        TerracottaNotRunningException

      • setNodeCoherent

        public void setNodeCoherent​(boolean arg0)
                     throws java.lang.UnsupportedOperationException,
                            TerracottaNotRunningException
        Sets the cache in coherent or incoherent mode depending on the parameter on this node. Calling setNodeCoherent(true) when the cache is already in coherent mode or calling setNodeCoherent(false) when already in incoherent mode will be a no-op.

        It applies to coherent clustering mechanisms only e.g. Terracotta

        When using Terracotta clustered caches with nonstop enabled, the timeout used by this method is NonstopConfiguration.getBulkOpsTimeoutMultiplyFactor() times the timeout value in the config.

        Specified by:
        setNodeCoherent in interface Ehcache
        Parameters:
        arg0 - true transitions to coherent mode, false to incoherent mode
        Throws:
        java.lang.UnsupportedOperationException - if this cache does not support coherence, like RMI replication
        TerracottaNotRunningException

      • waitUntilClusterCoherent

        public void waitUntilClusterCoherent()
                              throws java.lang.UnsupportedOperationException,
                                     TerracottaNotRunningException
        This method waits until the cache is in coherent mode in all the connected nodes. If the cache is already in coherent mode it returns immediately

        It applies to coherent clustering mechanisms only e.g. Terracotta

        Specified by:
        waitUntilClusterCoherent in interface Ehcache
        Throws:
        java.lang.UnsupportedOperationException - if this cache does not support coherence, like RMI replication
        TerracottaNotRunningException

      • getSearchAttribute

        public Attribute getSearchAttribute​(java.lang.String arg0)
                             throws CacheException
        Retrieve the given named search attribute
        Specified by:
        getSearchAttribute in interface Ehcache
        Parameters:
        arg0 - the name of the attribute to retrieve
        Returns:
        the search attribute
        Throws:
        CacheException - if no such attribute is defined for the given name

      • createQuery

        public Query createQuery()
        Create a new query builder for this cache
        Specified by:
        createQuery in interface Ehcache
        Returns:
        a new query builder

      • isSearchable

        public boolean isSearchable()
        Is this cache searchable?
        Specified by:
        isSearchable in interface Ehcache
        Returns:
        true if this cache is searchable

      • acquireReadLockOnKey

        public void acquireReadLockOnKey​(java.lang.Object arg0)
        Acquires the proper read lock for a given cache key
        Specified by:
        acquireReadLockOnKey in interface Ehcache
        Parameters:
        arg0 - - The key that retrieves a value that you want to protect via locking

      • acquireWriteLockOnKey

        public void acquireWriteLockOnKey​(java.lang.Object arg0)
        Acquires the proper write lock for a given cache key
        Specified by:
        acquireWriteLockOnKey in interface Ehcache
        Parameters:
        arg0 - - The key that retrieves a value that you want to protect via locking

      • tryReadLockOnKey

        public boolean tryReadLockOnKey​(java.lang.Object arg0,
                                long arg1)
                         throws java.lang.InterruptedException
        Try to get a read lock on a given key. If can't get it in timeout millis then return a boolean telling that it didn't get the lock
        Specified by:
        tryReadLockOnKey in interface Ehcache
        Parameters:
        arg0 - - The key that retrieves a value that you want to protect via locking
        arg1 - - millis until giveup on getting the lock
        Returns:
        whether the lock was awarded
        Throws:
        java.lang.InterruptedException - if the thread was interrupted

      • tryWriteLockOnKey

        public boolean tryWriteLockOnKey​(java.lang.Object arg0,
                                 long arg1)
                          throws java.lang.InterruptedException
        Try to get a write lock on a given key. If can't get it in timeout millis then return a boolean telling that it didn't get the lock
        Specified by:
        tryWriteLockOnKey in interface Ehcache
        Parameters:
        arg0 - - The key that retrieves a value that you want to protect via locking
        arg1 - - millis until giveup on getting the lock
        Returns:
        whether the lock was awarded
        Throws:
        java.lang.InterruptedException - if the thread was interrupted

      • releaseReadLockOnKey

        public void releaseReadLockOnKey​(java.lang.Object arg0)
        Release a held read lock for the passed in key
        Specified by:
        releaseReadLockOnKey in interface Ehcache
        Parameters:
        arg0 - - The key that retrieves a value that you want to protect via locking

      • releaseWriteLockOnKey

        public void releaseWriteLockOnKey​(java.lang.Object arg0)
        Release a held write lock for the passed in key
        Specified by:
        releaseWriteLockOnKey in interface Ehcache
        Parameters:
        arg0 - - The key that retrieves a value that you want to protect via locking

      • isReadLockedByCurrentThread

        public boolean isReadLockedByCurrentThread​(java.lang.Object arg0)
                                    throws java.lang.UnsupportedOperationException
        Returns true if a read lock for the key is held by the current thread
        Specified by:
        isReadLockedByCurrentThread in interface Ehcache
        Parameters:
        arg0 - the key
        Returns:
        true if a read lock for the key is held by the current thread
        Throws:
        java.lang.UnsupportedOperationException - if querying the read lock state is not supported

      • isWriteLockedByCurrentThread

        public boolean isWriteLockedByCurrentThread​(java.lang.Object arg0)
                                     throws java.lang.UnsupportedOperationException
        Returns true if a write lock for the key is held by the current thread
        Specified by:
        isWriteLockedByCurrentThread in interface Ehcache
        Parameters:
        arg0 - the key
        Returns:
        true if a write lock for the key is held by the current thread
        Throws:
        java.lang.UnsupportedOperationException - if querying the write lock state is not supported

      • isClusterBulkLoadEnabled

        public boolean isClusterBulkLoadEnabled()
                                 throws java.lang.UnsupportedOperationException,
                                        TerracottaNotRunningException
        Returns true if at least one node in the cluster is in bulk-load mode. Returns false otherwise.

        NOTE: if Ehcache.isNodeBulkLoadEnabled() returns true, this method will always return true. Applies to caches clustered with Terracotta only.

        Specified by:
        isClusterBulkLoadEnabled in interface Ehcache
        Returns:
        true if the cache is in bulk-load mode cluster-wide, false otherwise
        Throws:
        java.lang.UnsupportedOperationException - if the cache is not clustered with Terracotta
        TerracottaNotRunningException

      • isNodeBulkLoadEnabled

        public boolean isNodeBulkLoadEnabled()
                              throws java.lang.UnsupportedOperationException,
                                     TerracottaNotRunningException
        Returns true if the current node is in bulk-load mode. Returns false otherwise.

        NOTE: if this method returns true, Ehcache.isClusterBulkLoadEnabled() method will always return true. Applies to caches clustered with Terracotta only.

        Specified by:
        isNodeBulkLoadEnabled in interface Ehcache
        Returns:
        true if the cache is in coherent mode cluster-wide, false otherwise
        Throws:
        java.lang.UnsupportedOperationException - if the cache is not clustered with Terracotta
        TerracottaNotRunningException

      • setNodeBulkLoadEnabled

        public void setNodeBulkLoadEnabled​(boolean arg0)
                            throws java.lang.UnsupportedOperationException,
                                   TerracottaNotRunningException
        Enable/disable bulk-load mode in this node for this cache. Calling setBulkLoadEnabled(true) when the cache is already in bulk-load mode or calling setBulkLoadEnabled(false) when already NOT in bulk-load mode will be a no-op.

        Applies to caches clustered with Terracotta only.

        When using Terracotta clustered caches with nonstop enabled, the timeout used by this method is NonstopConfiguration.getBulkOpsTimeoutMultiplyFactor() times the timeout value in the nonstop config.

        Specified by:
        setNodeBulkLoadEnabled in interface Ehcache
        Parameters:
        arg0 - true enables bulk-load, false disables it if not already disabled
        Throws:
        java.lang.UnsupportedOperationException - if the cache is not clustered with Terracotta
        TerracottaNotRunningException

      • waitUntilClusterBulkLoadComplete

        public void waitUntilClusterBulkLoadComplete()
                                      throws java.lang.UnsupportedOperationException,
                                             TerracottaNotRunningException
        This method waits until all the connected nodes have disabled bulk-load. Or in other words, calling this method will block until all connected nodes in the cluster disables bulk-load. If none of the nodes did not enable bulk-load this method will return immediately

        Applies to caches clustered with Terracotta only.

        Specified by:
        waitUntilClusterBulkLoadComplete in interface Ehcache
        Throws:
        java.lang.UnsupportedOperationException - if the cache is not clustered with Terracotta
        TerracottaNotRunningException

      • loadAll

        public void loadAll​(java.util.Collection arg0,
                    java.lang.Object arg1)
             throws CacheException
        The loadAll method provides a means to "pre load" objects into the cache. This method will, asynchronously, load the specified objects into the cache using the associated cache loader. If the an object already exists in the cache, no action is taken. If no loader is associated with the object, no object will be loaded into the cache. If a problem is encountered during the retrieving or loading of the objects, an exception (to be defined) should be logged. The getAll method will return, from the cache, a Map of the objects associated with the Collection of keys in argument "keys". If the objects are not in the cache, the associated cache loader will be called. If no loader is associated with an object, a null is returned. If a problem is encountered during the retrieving or loading of the objects, an exception (to be defined) will be thrown. If the "arg" argument is set, the arg object will be passed to the CacheLoader.loadAll method. The cache will not dereference the object. If no "arg" value is provided a null will be passed to the loadAll method.

        Specified by:
        loadAll in interface Ehcache
        Parameters:
        arg0 - - collection of the keys whose associated values to be loaded into this cache by using the associated cacheloader if this cache doesn't contain them.
        arg1 - can be anything that makes sense to the loader

        The Ehcache native API provides similar functionality to loaders using the decorator SelfPopulatingCache

        Throws:
        CacheException

      • toString

        public java.lang.String toString()
        Returns a String representation of Cache.
        Specified by:
        toString in interface Ehcache
        Overrides:
        toString in class java.lang.Object

      • put

        public void put​(Element arg0)
         throws java.lang.IllegalArgumentException,
                java.lang.IllegalStateException,
                CacheException
        Put an element in the cache.

        Resets the access statistics on the element, which would be the case if it has previously been gotten from a cache, and is now being put back.

        Also notifies the CacheEventListener that:

        • the element was put, but only if the Element was actually put.
        • if the element exists in the cache, that an update has occurred, even if the element would be expired if it was requested
        Specified by:
        put in interface Ehcache
        Parameters:
        arg0 - An object. If Serializable it can fully participate in replication and the DiskStore.
        Throws:
        java.lang.IllegalArgumentException - if the element is null
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException - a runtime cache exception

      • put

        public void put​(Element arg0,
                boolean arg1)
         throws java.lang.IllegalArgumentException,
                java.lang.IllegalStateException,
                CacheException
        Put an element in the cache.

        Resets the access statistics on the element, which would be the case if it has previously been gotten from a cache, and is now being put back.

        Also notifies the CacheEventListener that:

        • the element was put, but only if the Element was actually put.
        • if the element exists in the cache, that an update has occurred, even if the element would be expired if it was requested
        Specified by:
        put in interface Ehcache
        Parameters:
        arg0 - An object. If Serializable it can fully participate in replication and the DiskStore.
        arg1 - whether the put is coming from a doNotNotifyCacheReplicators cache peer, in which case this put should not initiate a further notification to doNotNotifyCacheReplicators cache peers
        Throws:
        java.lang.IllegalArgumentException - if the element is null
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException

      • clone

        public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
        Clones a cache. This is only legal if the cache has not been initialized. At that point only primitives have been set and no MemoryStore or DiskStore has been created.

        A new, empty, RegisteredEventListeners is created on clone.

        Specified by:
        clone in interface Ehcache
        Overrides:
        clone in class java.lang.Object
        Returns:
        an object of type Cache
        Throws:
        java.lang.CloneNotSupportedException - if it's not supported

      • getName

        public java.lang.String getName()
        Gets the cache name.
        Specified by:
        getName in interface Ehcache
        Returns:
        the name

      • replace

        public Element replace​(Element arg0)
                throws java.lang.NullPointerException
        Replace the cached element only if an Element is currently cached for this key
        Specified by:
        replace in interface Ehcache
        Parameters:
        arg0 - Element to be cached
        Returns:
        the Element previously cached for this key, or null if no Element was cached
        Throws:
        java.lang.NullPointerException - if the Element is null or has a null key

      • replace

        public boolean replace​(Element arg0,
                       Element arg1)
                throws java.lang.NullPointerException,
                       java.lang.IllegalArgumentException
        Replace the cached element only if the current Element is equal to the supplied old Element.
        Specified by:
        replace in interface Ehcache
        Parameters:
        arg0 - Element to be test against
        arg1 - Element to be cached
        Returns:
        true if the Element was replaced
        Throws:
        java.lang.NullPointerException - if the either Element is null or has a null key
        java.lang.IllegalArgumentException - if the two Element keys are non-null but not equal

      • putAll

        public void putAll​(java.util.Collection arg0)
            throws java.lang.IllegalArgumentException,
                   java.lang.IllegalStateException,
                   CacheException
        Puts a collection of elements in to the cache.

        This method will throw a NullPointerException if a null element or null key is encountered in the collection, and a partial completion may result (as only some of the elements may have been put).

        For each element that is put the registered CacheEventListeners are notified of a newly put item (notifyElementPut(...)) regardless of whether the individual put is a new put or an update.

        Specified by:
        putAll in interface Ehcache
        Parameters:
        arg0 - the collection of elements to be put in the cache.
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException - a runtime cache exception
        java.lang.IllegalArgumentException

      • remove

        public boolean remove​(java.io.Serializable arg0,
                      boolean arg1)
               throws java.lang.IllegalStateException
        Removes an Element from the Cache. This also removes it from any stores it may be in.

        Also notifies the CacheEventListener after the element was removed, but only if an Element with the key actually existed.

        Specified by:
        remove in interface Ehcache
        Parameters:
        arg0 - the key of the element to remove
        arg1 - whether the put is coming from a doNotNotifyCacheReplicators cache peer, in which case this put should not initiate a further notification to doNotNotifyCacheReplicators cache peers
        Returns:
        true if the element was removed, false if it was not found in the cache
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • remove

        public boolean remove​(java.lang.Object arg0)
               throws java.lang.IllegalStateException
        Removes an Element from the Cache. This also removes it from any stores it may be in.

        Also notifies the CacheEventListener after the element was removed, but only if an Element with the key actually existed.

        Specified by:
        remove in interface Ehcache
        Parameters:
        arg0 - the key of the element to remove
        Returns:
        true if the element was removed, false if it was not found in the cache
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • remove

        public boolean remove​(java.io.Serializable arg0)
               throws java.lang.IllegalStateException
        Removes an Element from the Cache. This also removes it from any stores it may be in.

        Also notifies the CacheEventListener after the element was removed.

        Specified by:
        remove in interface Ehcache
        Parameters:
        arg0 - the key of the element to remove
        Returns:
        true if the element was removed, false if it was not found in the cache
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • remove

        public boolean remove​(java.lang.Object arg0,
                      boolean arg1)
               throws java.lang.IllegalStateException
        Removes an Element from the Cache. This also removes it from any stores it may be in.

        Also notifies the CacheEventListener after the element was removed, but only if an Element with the key actually existed.

        Specified by:
        remove in interface Ehcache
        Parameters:
        arg0 - of the element to remove
        arg1 - whether the put is coming from a doNotNotifyCacheReplicators cache peer, in which case this put should not initiate a further notification to doNotNotifyCacheReplicators cache peers
        Returns:
        true if the element was removed, false if it was not found in the cache
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • load

        public void load​(java.lang.Object arg0)
          throws CacheException
        The load method provides a means to "pre load" the cache. This method will, asynchronously, load the specified object into the cache using the associated cacheloader. If the object already exists in the cache, no action is taken. If no loader is associated with the object, no object will be loaded into the cache. If a problem is encountered during the retrieving or loading of the object, an exception should be logged. If the "arg" argument is set, the arg object will be passed to the CacheLoader.load method. The cache will not dereference the object. If no "arg" value is provided a null will be passed to the load method. The storing of null values in the cache is permitted, however, the get method will not distinguish returning a null stored in the cache and not finding the object in the cache. In both cases a null is returned.

        The Ehcache native API provides similar functionality to loaders using the decorator SelfPopulatingCache

        Specified by:
        load in interface Ehcache
        Parameters:
        arg0 - key whose associated value to be loaded using the associated cacheloader if this cache doesn't contain it.
        Throws:
        CacheException - a runtime cache exception

      • setName

        public void setName​(java.lang.String arg0)
        Sets the cache name which will name.
        Specified by:
        setName in interface Ehcache
        Parameters:
        arg0 - the name of the cache. Should not be null.

      • flush

        public void flush()
           throws java.lang.IllegalStateException,
                  CacheException
        Flushes all cache items from memory to the disk store, and from the DiskStore to disk.
        Specified by:
        flush in interface Ehcache
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException

      • getSize

        public int getSize()
            throws java.lang.IllegalStateException,
                   CacheException
        Gets the size of the cache. This is a subtle concept. See below.

        The size is the number of Elements in the MemoryStore plus the number of Elements in the DiskStore.

        This number is the actual number of elements, including expired elements that have not been removed.

        Expired elements are removed from the the memory store when getting an expired element, or when attempting to spool an expired element to disk.

        Expired elements are removed from the disk store when getting an expired element, or when the expiry thread runs, which is once every five minutes.

        To get an exact size, which would exclude expired elements, use Ehcache.getKeysWithExpiryCheck().size(), although see that method for the approximate time that would take.

        To get a very fast result, use Ehcache.getKeysNoDuplicateCheck().size(). If the disk store is being used, there will be some duplicates.

        Note:getSize() is a very expensive operation in off-heap, disk and Terracotta implementations.

        Specified by:
        getSize in interface Ehcache
        Returns:
        The size value
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException

      • removeElement

        public boolean removeElement​(Element arg0)
                      throws java.lang.NullPointerException
        Remove the Element mapped to the key for the supplied element if the value of the supplied Element compares equal to the value of the cached Element.

        This is equivalent to 

           if (elementValueComparator.equals(cache.get(element.getObjectKey()), element)) {
       return cache.remove(element.getObjectKey());
   } else return false;
        except that the action is performed atomically.
        Specified by:
        removeElement in interface Ehcache
        Parameters:
        arg0 - Element to be removed
        Returns:
        true if the value was removed
        Throws:
        java.lang.NullPointerException - if the element is null, or has a null key
        See Also:
        CacheConfiguration.addElementValueComparator(net.sf.ehcache.config.ElementValueComparatorConfiguration)

      • removeAll

        public void removeAll​(boolean arg0)
               throws java.lang.IllegalStateException,
                      CacheException
        Removes all cached items.

        When using Terracotta clustered caches with nonstop enabled, the timeout used by this method is NonstopConfiguration.getBulkOpsTimeoutMultiplyFactor() times the timeout value in the nonstop config.

        Specified by:
        removeAll in interface Ehcache
        Parameters:
        arg0 - whether the put is coming from a doNotNotifyCacheReplicators cache peer, in which case this put should not initiate a further notification to doNotNotifyCacheReplicators cache peers
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException

      • removeAll

        public void removeAll​(java.util.Collection arg0,
                      boolean arg1)
               throws java.lang.IllegalStateException,
                      java.lang.NullPointerException
        Removes all cached items.

        When using Terracotta clustered caches with nonstop enabled, the timeout used by this method is NonstopConfiguration.getBulkOpsTimeoutMultiplyFactor() times the timeout value in the nonstop config.

        Specified by:
        removeAll in interface Ehcache
        Parameters:
        arg0 - a collection of keys to operate on
        arg1 - whether the put is coming from a doNotNotifyCacheReplicators cache peer, in which case this put should not initiate a further notification to doNotNotifyCacheReplicators cache peers
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        java.lang.NullPointerException

      • removeAll

        public void removeAll​(java.util.Collection arg0)
               throws java.lang.IllegalStateException,
                      java.lang.NullPointerException
        Removes given set of Element from the Cache. This also removes them from any stores it may be in. Throws a NullPointerException if any key in the collection is null

        Also notifies the CacheEventListener after the elements were removed. Notification is sent for every key irrespective of whether the key was present in the cache or not This operation is partially completed if any element or any key is null

        Specified by:
        removeAll in interface Ehcache
        Parameters:
        arg0 - a collection of keys to operate on
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        java.lang.NullPointerException - if any key is null in the collection

      • putIfAbsent

        public Element putIfAbsent​(Element arg0)
                    throws java.lang.NullPointerException
        Put an element in the cache if no element is currently mapped to the elements key.
        Specified by:
        putIfAbsent in interface Ehcache
        Parameters:
        arg0 - element to be added
        Returns:
        the element previously cached for this key, or null if none.
        Throws:
        java.lang.NullPointerException - if the element is null, or has a null key

      • putIfAbsent

        public Element putIfAbsent​(Element arg0,
                           boolean arg1)
                    throws java.lang.NullPointerException
        Put an element in the cache if no element is currently mapped to the elements key.
        Specified by:
        putIfAbsent in interface Ehcache
        Parameters:
        arg0 - element to be added
        arg1 - whether the put is coming from a doNotNotifyCacheReplicators cache peer, in which case this put should not initiate a further notification to doNotNotifyCacheReplicators cache peers
        Returns:
        the element previously cached for this key, or null if none.
        Throws:
        java.lang.NullPointerException - if the element is null, or has a null key

      • addPropertyChangeListener

        public void addPropertyChangeListener​(java.beans.PropertyChangeListener arg0)
        Add a PropertyChangeListener.
        Specified by:
        addPropertyChangeListener in interface Ehcache
        Parameters:
        arg0 - the listener to add

      • removePropertyChangeListener

        public void removePropertyChangeListener​(java.beans.PropertyChangeListener arg0)
        Remove a PropertyChangeListener.
        Specified by:
        removePropertyChangeListener in interface Ehcache
        Parameters:
        arg0 - the listener to remove

      • dispose

        public void dispose()
             throws java.lang.IllegalStateException
        Flushes all cache items from memory to auxilliary caches and close the auxilliary caches.

        Should be invoked only by CacheManager.

        Specified by:
        dispose in interface Ehcache
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE

      • getKeys

        public java.util.List getKeys()
                       throws java.lang.IllegalStateException,
                              CacheException
        Returns a list of all elements in the cache, whether or not they are expired.

        The returned keys are unique and can be considered a set.

        The List returned is not live. It is a copy.

        The time taken is O(n). For large caches - or caches with high-latency storage this method can take a very long time to complete, may cause timeouts if using features such NonStopCache or transactions, and is not guaranteed to give a consistent view of the cache entry set. Usage is highly discouraged.

        Specified by:
        getKeys in interface Ehcache
        Returns:
        a list of Object keys
        Throws:
        java.lang.IllegalStateException - if the cache is not Status.STATUS_ALIVE
        CacheException

      • getStatus

        public Status getStatus()
        Gets the status attribute of the Cache.
        Specified by:
        getStatus in interface Ehcache
        Returns:
        The status value from the Status enum class