org.infinispan.container
Class DefaultDataContainer

java.lang.Object
  org.infinispan.container.DefaultDataContainer

All Implemented Interfaces:

Iterable<InternalCacheEntry>, DataContainer

@ThreadSafe
public class DefaultDataContainer
extends Object
implements DataContainer

Simple data container that does not order entries for eviction, implemented using two ConcurrentHashMaps, one for mortal and one for immortal entries.

This container does not support eviction, in that entries are unsorted.

This implementation offers O(1) performance for all operations.

Since:

4.0

Author:

Manik Surtani, Galder Zamarreño, Vladimir Blagojevic

Constructor Summary

protected	DefaultDataContainer(int concurrencyLevel)
protected	DefaultDataContainer(int concurrencyLevel, int maxEntries, EvictionStrategy strategy, EvictionThreadPolicy policy)

Method Summary

static DataContainer	boundedDataContainer(int concurrencyLevel, int maxEntries, EvictionStrategy strategy, EvictionThreadPolicy policy)
void	clear() Removes all entries in the container
boolean	containsKey(Object k) Tests whether an entry exists in the container
Set<InternalCacheEntry>	entrySet() Returns a mutable set of immutable cache entries exposed as immutable Map.Entry instances.
InternalCacheEntry	get(Object k) Retrieves a cached entry
void	initialize(EvictionManager evictionManager)
Iterator<InternalCacheEntry>	iterator()
Set<Object>	keySet() Returns a set of keys in the container.
InternalCacheEntry	peek(Object key) Retrieves a cache entry in the same way as DataContainer.get(Object)} except that it does not update or reorder any of the internal constructs.
void	purgeExpired() Purges entries that have passed their expiry time
void	put(Object k, Object v, long lifespan, long maxIdle) Puts an entry in the cache along with a lifespan and a maxIdle time
InternalCacheEntry	remove(Object k) Removes an entry from the cache
int	size()
protected void	successfulPut(InternalCacheEntry ice, boolean newEntry)
static DataContainer	unBoundedDataContainer(int concurrencyLevel)
Collection<Object>	values()

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultDataContainer

protected DefaultDataContainer(int concurrencyLevel)

DefaultDataContainer

protected DefaultDataContainer(int concurrencyLevel,
                               int maxEntries,
                               EvictionStrategy strategy,
                               EvictionThreadPolicy policy)

Method Detail

initialize

public void initialize(EvictionManager evictionManager)

boundedDataContainer

public static DataContainer boundedDataContainer(int concurrencyLevel,
                                                 int maxEntries,
                                                 EvictionStrategy strategy,
                                                 EvictionThreadPolicy policy)

unBoundedDataContainer

public static DataContainer unBoundedDataContainer(int concurrencyLevel)

peek

public InternalCacheEntry peek(Object key)

Description copied from interface: DataContainer

Retrieves a cache entry in the same way as DataContainer.get(Object)} except that it does not update or reorder any of the internal constructs. I.e., expiration does not happen, and in the case of the LRU container, the entry is not moved to the end of the chain. This method should be used instead of DataContainer.get(Object)} when called while iterating through the data container using methods like DataContainer.keySet() to avoid changing the underlying collection's order.

Specified by:

peek in interface DataContainer

Parameters:

key - key under which entry is stored

Returns:

entry, if it exists, or null if not

get

public InternalCacheEntry get(Object k)

Description copied from interface: DataContainer

Retrieves a cached entry

Specified by:

get in interface DataContainer

Parameters:

k - key under which entry is stored

Returns:

entry, if it exists and has not expired, or null if not

successfulPut

protected void successfulPut(InternalCacheEntry ice,
                             boolean newEntry)

put

public void put(Object k,
                Object v,
                long lifespan,
                long maxIdle)

Description copied from interface: DataContainer

Puts an entry in the cache along with a lifespan and a maxIdle time

Specified by:

put in interface DataContainer

Parameters:

k - key under which to store entry

v - value to store

lifespan - lifespan in milliseconds. -1 means immortal.

maxIdle - max idle time for which to store entry. -1 means forever.

containsKey

public boolean containsKey(Object k)

Description copied from interface: DataContainer

Tests whether an entry exists in the container

Specified by:

containsKey in interface DataContainer

Parameters:

k - key to test

Returns:

true if entry exists and has not expired; false otherwise

remove

public InternalCacheEntry remove(Object k)

Description copied from interface: DataContainer

Removes an entry from the cache

Specified by:

remove in interface DataContainer

Parameters:

k - key to remove

Returns:

entry removed, or null if it didn't exist or had expired

size

public int size()

Specified by:

size in interface DataContainer

Returns:

count of the number of entries in the container

clear

public void clear()

Description copied from interface: DataContainer

Removes all entries in the container

Specified by:

clear in interface DataContainer

keySet

public Set<Object> keySet()

Description copied from interface: DataContainer

Returns a set of keys in the container. When iterating through the container using this method, clients should never call #get() method but instead #peek(), in order to avoid changing the order of the underlying collection as a side of effect of iterating through it.

Specified by:

keySet in interface DataContainer

Returns:

a set of keys

values

public Collection<Object> values()

Specified by:

values in interface DataContainer

Returns:

a set of values contained in the container

entrySet

public Set<InternalCacheEntry> entrySet()

Description copied from interface: DataContainer

Returns a mutable set of immutable cache entries exposed as immutable Map.Entry instances. Clients of this method such as Cache.entrySet() operation implementors are free to convert the set into an immutable set if needed, which is the most common use case. If a client needs to iterate through a mutable set of mutable cache entries, it should iterate the container itself rather than iterating through the return of entrySet().

Specified by:

entrySet in interface DataContainer

Returns:

a set of immutable cache entries

purgeExpired

public void purgeExpired()

Description copied from interface: DataContainer

Purges entries that have passed their expiry time

Specified by:

purgeExpired in interface DataContainer

iterator

public Iterator<InternalCacheEntry> iterator()

Specified by:

iterator in interface Iterable<InternalCacheEntry>