org.archive.util
Class ObjectIdentityMemCache<V>

java.lang.Object
  org.archive.util.ObjectIdentityMemCache<V>

Type Parameters:

V -

All Implemented Interfaces:

java.io.Closeable, ObjectIdentityCache<java.lang.String,V>

public class ObjectIdentityMemCache<V>
extends java.lang.Object
implements ObjectIdentityCache<java.lang.String,V>

Trivial all-in-memory object cache, using a single internal ConcurrentHashMap.

Field Summary

(package private) java.util.concurrent.ConcurrentHashMap<java.lang.String,V>

map

Constructor Summary

ObjectIdentityMemCache()

ObjectIdentityMemCache(int cap, float load, int conc)

Method Summary

void	close() close/release any associated resources
V	get(java.lang.String key) get the object under the given key/name
V	getOrUse(java.lang.String key, Supplier<V> supplierOrNull) get the object under the given key/name, using (and remembering) the object supplied by the supplier if no prior mapping exists
java.util.Set<java.lang.String>	keySet() set of all keys
int	size() count of name-to-object contained
void	sync() force the persistent backend, if any, to be updated with all live object state

Methods inherited from class java.lang.Object

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

Field Detail

map

java.util.concurrent.ConcurrentHashMap<java.lang.String,V> map

Constructor Detail

ObjectIdentityMemCache

public ObjectIdentityMemCache()

ObjectIdentityMemCache

public ObjectIdentityMemCache(int cap,
                              float load,
                              int conc)

Method Detail

close

public void close()

Description copied from interface: ObjectIdentityCache

close/release any associated resources

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface ObjectIdentityCache<java.lang.String,V>

get

public V get(java.lang.String key)

Description copied from interface: ObjectIdentityCache

get the object under the given key/name

Specified by:

get in interface ObjectIdentityCache<java.lang.String,V>

getOrUse

public V getOrUse(java.lang.String key,
                  Supplier<V> supplierOrNull)

Description copied from interface: ObjectIdentityCache

get the object under the given key/name, using (and remembering) the object supplied by the supplier if no prior mapping exists

Specified by:

getOrUse in interface ObjectIdentityCache<java.lang.String,V>

size

public int size()

Description copied from interface: ObjectIdentityCache

count of name-to-object contained

Specified by:

size in interface ObjectIdentityCache<java.lang.String,V>

keySet

public java.util.Set<java.lang.String> keySet()

Description copied from interface: ObjectIdentityCache

set of all keys

Specified by:

keySet in interface ObjectIdentityCache<java.lang.String,V>

sync

public void sync()

Description copied from interface: ObjectIdentityCache

force the persistent backend, if any, to be updated with all live object state

Specified by:

sync in interface ObjectIdentityCache<java.lang.String,V>