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java.lang.Objectorg.exolab.castor.persist.LRU
org.exolab.castor.persist.LRU.TimeLimited
public static class LRU.TimeLimited
TimeLimited is a time limted least-recently-used Map.
Every object being put in the Map will live until the timeout expired.
Method dispose(Object)
will be called whenever an
old object is diposed. Developer can get notify by overriding
the dispose method dispose(Object)
.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.exolab.castor.persist.LRU |
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LRU.CountLimited, LRU.NoCache, LRU.TimeLimited, LRU.Unlimited |
Field Summary | |
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static int |
DEFAULT_PRECISION
The Default precision in millisecond is 1000. |
Fields inherited from class org.exolab.castor.persist.LRU |
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CACHE_COUNT_LIMITED, CACHE_NONE, CACHE_TIME_LIMITED, CACHE_UNLIMITED, DEFAULT_PARAM, DEFAULT_TYPE |
Constructor Summary | |
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LRU.TimeLimited(int interval)
Constructor |
Method Summary | |
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protected void |
dispose(java.lang.Object o)
This method is called when an object is disposed. |
java.util.Enumeration |
elements()
Returns an enumeration of the values in this LRU map. |
java.lang.Object |
get(java.lang.Object key)
Returns the value to which the specified key is mapped in this Map. |
java.lang.Object |
put(java.lang.Object key,
java.lang.Object value)
Maps the specified key to the specified
value in this Map. |
java.lang.Object |
remove(java.lang.Object key)
Removes the key (and its corresponding value) from this Map. |
Methods inherited from class org.exolab.castor.persist.LRU |
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create, mapType |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final int DEFAULT_PRECISION
Constructor Detail |
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public LRU.TimeLimited(int interval)
interval
- the number of ticks an object live before it is disposed.tick
- precision in msec.Method Detail |
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public java.lang.Object put(java.lang.Object key, java.lang.Object value)
key
to the specified
value
in this Map. Neither the key nor the
value can be null
.
The value can be retrieved by calling the get
method
with a key that is equal to the original key, before it is diposed
when the timeout of the entry is expired.
put
in class LRU
key
- the Map key.value
- the value.
null
if it did not have one.
java.lang.NullPointerException
- if the key or value is
null
.public java.lang.Object get(java.lang.Object key)
get
in class LRU
key
- - a key in the Map.
public java.lang.Object remove(java.lang.Object key)
remove
in class LRU
key
- the key that needs to be removed.
null
if the key did not have a mapping.public java.util.Enumeration elements()
elements
in class LRU
Enumeration
protected void dispose(java.lang.Object o)
o
- - the disposed object
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