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Java Source Code / Java Documentation » Database DBMS » JDBM » jdbm.recman 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   jdbm.recman.CacheRecordManager

CacheRecordManager
public class CacheRecordManager implements RecordManager(Code)
A RecordManager wrapping and caching another RecordManager.
author:
   Alex Boisvert
author:
   Cees de Groot
version:
   $Id: CacheRecordManager.java,v 1.9 2005/06/25 23:12:32 doomdark Exp $


Field Summary
protected  CachePolicy_cache
    
protected  RecordManager_recman
    

Constructor Summary
public  CacheRecordManager(RecordManager recman, CachePolicy cache)
     Construct a CacheRecordManager wrapping another RecordManager and using a given cache policy.

Method Summary
public synchronized  voidclose()
     Closes the record manager.
public synchronized  voidcommit()
     Commit (make persistent) all changes since beginning of transaction.
public synchronized  voiddelete(long recid)
     Deletes a record.
public  Objectfetch(long recid)
     Fetches a record using standard Java serialization.
Parameters:
  recid - the recid for the record that must be fetched.
public synchronized  Objectfetch(long recid, Serializer serializer)
     Fetches a record using a custom serializer.
public  CachePolicygetCachePolicy()
     Get the underlying cache policy underlying CachePolicy or null if CacheRecordManager hasbeen closed.
public synchronized  longgetNamedObject(String name)
     Obtain the record id of a named object.
public  RecordManagergetRecordManager()
     Get the underlying Record Manager. underlying RecordManager or null if CacheRecordManager hasbeen closed.
public synchronized  longgetRoot(int id)
     Returns the indicated root rowid.
public synchronized  intgetRootCount()
     Returns the number of slots available for "root" rowids.
public  longinsert(Object obj)
     Inserts a new record using a custom serializer.
Parameters:
  obj - the object for the new record.
public synchronized  longinsert(Object obj, Serializer serializer)
     Inserts a new record using a custom serializer.
public synchronized  voidrollback()
     Rollback (cancel) all changes since beginning of transaction.
public synchronized  voidsetNamedObject(String name, long recid)
     Set the record id of a named object.
public synchronized  voidsetRoot(int id, long rowid)
     Sets the indicated root rowid.
public  voidupdate(long recid, Object obj)
     Updates a record using standard Java serialization.
public synchronized  voidupdate(long recid, Object obj, Serializer serializer)
     Updates a record using a custom serializer.
protected  voidupdateCacheEntries()
     Update all dirty cache objects to the underlying RecordManager.

Field Detail
_cache
protected CachePolicy _cache(Code)
Cache for underlying RecordManager



_recman
protected RecordManager _recman(Code)
Wrapped RecordManager




Constructor Detail
CacheRecordManager
public CacheRecordManager(RecordManager recman, CachePolicy cache)(Code)
Construct a CacheRecordManager wrapping another RecordManager and using a given cache policy.
Parameters:
  recman - Wrapped RecordManager
Parameters:
  cache - Cache policy




Method Detail
close
public synchronized void close() throws IOException(Code)
Closes the record manager.
throws:
  IOException - when one of the underlying I/O operations fails.



commit
public synchronized void commit() throws IOException(Code)
Commit (make persistent) all changes since beginning of transaction.



delete
public synchronized void delete(long recid) throws IOException(Code)
Deletes a record.
Parameters:
  recid - the rowid for the record that should be deleted.
throws:
  IOException - when one of the underlying I/O operations fails.



fetch
public Object fetch(long recid) throws IOException(Code)
Fetches a record using standard Java serialization.
Parameters:
  recid - the recid for the record that must be fetched. the object contained in the record.
throws:
  IOException - when one of the underlying I/O operations fails.



fetch
public synchronized Object fetch(long recid, Serializer serializer) throws IOException(Code)
Fetches a record using a custom serializer.
Parameters:
  recid - the recid for the record that must be fetched.
Parameters:
  serializer - a custom serializer the object contained in the record.
throws:
  IOException - when one of the underlying I/O operations fails.



getCachePolicy
public CachePolicy getCachePolicy()(Code)
Get the underlying cache policy underlying CachePolicy or null if CacheRecordManager hasbeen closed.



getNamedObject
public synchronized long getNamedObject(String name) throws IOException(Code)
Obtain the record id of a named object. Returns 0 if named object doesn't exist.



getRecordManager
public RecordManager getRecordManager()(Code)
Get the underlying Record Manager. underlying RecordManager or null if CacheRecordManager hasbeen closed.



getRoot
public synchronized long getRoot(int id) throws IOException(Code)
Returns the indicated root rowid.
See Also:   CacheRecordManager.getRootCount



getRootCount
public synchronized int getRootCount()(Code)
Returns the number of slots available for "root" rowids. These slots can be used to store special rowids, like rowids that point to other rowids. Root rowids are useful for bootstrapping access to a set of data.



insert
public long insert(Object obj) throws IOException(Code)
Inserts a new record using a custom serializer.
Parameters:
  obj - the object for the new record. the rowid for the new record.
throws:
  IOException - when one of the underlying I/O operations fails.



insert
public synchronized long insert(Object obj, Serializer serializer) throws IOException(Code)
Inserts a new record using a custom serializer.
Parameters:
  obj - the object for the new record.
Parameters:
  serializer - a custom serializer the rowid for the new record.
throws:
  IOException - when one of the underlying I/O operations fails.



rollback
public synchronized void rollback() throws IOException(Code)
Rollback (cancel) all changes since beginning of transaction.



setNamedObject
public synchronized void setNamedObject(String name, long recid) throws IOException(Code)
Set the record id of a named object.



setRoot
public synchronized void setRoot(int id, long rowid) throws IOException(Code)
Sets the indicated root rowid.
See Also:   CacheRecordManager.getRootCount



update
public void update(long recid, Object obj) throws IOException(Code)
Updates a record using standard Java serialization.
Parameters:
  recid - the recid for the record that is to be updated.
Parameters:
  obj - the new object for the record.
throws:
  IOException - when one of the underlying I/O operations fails.



update
public synchronized void update(long recid, Object obj, Serializer serializer) throws IOException(Code)
Updates a record using a custom serializer.
Parameters:
  recid - the recid for the record that is to be updated.
Parameters:
  obj - the new object for the record.
Parameters:
  serializer - a custom serializer
throws:
  IOException - when one of the underlying I/O operations fails.



updateCacheEntries
protected void updateCacheEntries() throws IOException(Code)
Update all dirty cache objects to the underlying RecordManager.



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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