| java.lang.Object
 net.sourceforge.jtds.jdbc.cache.ProcedureCache
| ProcedureCache | | public class ProcedureCache implements StatementCache(Code) | | LRU cache for procedures and statement handles.
version:
$Id: ProcedureCache.java,v 1.5 2005/07/05 16:44:25 alin_sinpalean Exp $ |
| Field Summary | |
| int | cacheSize
Maximum cache size or 0 to disable. | | ArrayList | free
List of redundant cache entries. | | CacheEntry | head
Head node of the linked list. | | CacheEntry | tail
Tail node of the linked list. |
| Constructor Summary | |
| public | ProcedureCache(int cacheSize)
Constructs a new statement cache. |
| Method Summary | |
| public synchronized Object | get(String key)
Retrieves a ProcEntry object from the cache. | | public synchronized Collection | getObsoleteHandles(Collection handles)
Obtains a list of statement handles or procedures that can now be
dropped. | | public synchronized void | put(String key, Object handle)
Inserts a new entry, identified by a key, into the cache. | | public synchronized void | remove(String key)
Removes a redundant entry from the cache. |
| cacheSize | | int cacheSize(Code) | | Maximum cache size or 0 to disable.
|
| head | | CacheEntry head(Code) | | Head node of the linked list.
|
| tail | | CacheEntry tail(Code) | | Tail node of the linked list.
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| ProcedureCache | | public ProcedureCache(int cacheSize)(Code) | | Constructs a new statement cache.
Parameters:
cacheSize - maximum cache size or 0 to disable caching |
| get | | public synchronized Object get(String key)(Code) | | Retrieves a ProcEntry object from the cache.
If the entry exists it is moved to the front of the linked list to keep
it alive as long as possible.
Parameters:
key - the key value identifying the required entry the keyed entry as an Object or null if the entrydoes not exist |
| getObsoleteHandles | | public synchronized Collection getObsoleteHandles(Collection handles)(Code) | | Obtains a list of statement handles or procedures that can now be
dropped.
Parameters:
handles - a collection of single use statements that will bereturned for dropping if the cache is disabled the collection of redundant statments for dropping |
| put | | public synchronized void put(String key, Object handle)(Code) | | Inserts a new entry, identified by a key, into the cache.
If the cache is full then one or more entries are removed and
transferred to a list for later destruction.
Parameters:
key - value used to identify the entry
Parameters:
handle - proc entry to be inserted into the cache |
| remove | | public synchronized void remove(String key)(Code) | | Removes a redundant entry from the cache.
Parameters:
key - value that identifies the cache entry |
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