org.siebengeisslein.core
Class BTreeNodeCache

java.lang.Object
  org.siebengeisslein.core.BTreeNodeCache

public class BTreeNodeCache
extends java.lang.Object

TODO: This is not a cache anymore.... Move functionality to BTree?

Field Summary

static int	CACHE_STRONG
static int	CACHE_WEAK
static java.lang.String	EXT

Constructor Summary

BTreeNodeCache(int size, java.lang.String filename, boolean create)

Method Summary

void	addValue(long index, long key, long value) TODO: This is only used for testing purposes !?!
void	close()
void	commit()
java.util.SortedMap<java.lang.Long,java.lang.Long>	getGarbageObjects()
java.util.Set<java.lang.Long>	getReferencedOIDs()
long	getValue(long index, long key, boolean exact)
BTreeNode	lock(long index)
void	moveEntries(DataStore store)
void	remove(long oid)
void	resetAllGCFlags()
void	setGCEvaluated(long index, long oid)
void	setGCReferenced(long index, long oid)
void	setValue(long index, long key, long value)
void	unlock(long index) This method may not be synchronized, because another thread might have a lock on the Cache.
protected void	writeNode(java.lang.Long index)

Methods inherited from class java.lang.Object

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

Field Detail

EXT

public static final java.lang.String EXT

See Also:

Constant Field Values

CACHE_WEAK

public static final int CACHE_WEAK

See Also:

Constant Field Values

CACHE_STRONG

public static final int CACHE_STRONG

See Also:

Constant Field Values

Constructor Detail

BTreeNodeCache

public BTreeNodeCache(int size,
                      java.lang.String filename,
                      boolean create)
               throws java.io.IOException

Throws:

java.io.IOException

Method Detail

setValue

public void setValue(long index,
                     long key,
                     long value)
              throws java.io.IOException,
                     UnknownOIDException

Throws:

java.io.IOException

UnknownOIDException

addValue

public void addValue(long index,
                     long key,
                     long value)
              throws java.io.IOException

TODO: This is only used for testing purposes !?! Remove?

Throws:

java.io.IOException

getValue

public long getValue(long index,
                     long key,
                     boolean exact)
              throws java.io.IOException,
                     UnknownOIDException

Throws:

java.io.IOException

UnknownOIDException

lock

public BTreeNode lock(long index)
               throws java.io.IOException

Throws:

java.io.IOException

unlock

public void unlock(long index)
            throws java.io.IOException

This method may not be synchronized, because another thread might have a lock on the Cache.

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Throws:

java.io.IOException

commit

public void commit()
            throws java.io.IOException

Throws:

java.io.IOException

writeNode

protected void writeNode(java.lang.Long index)
                  throws java.io.IOException

Throws:

java.io.IOException

setGCReferenced

public void setGCReferenced(long index,
                            long oid)
                     throws java.io.IOException,
                            UnknownOIDException

Throws:

java.io.IOException

UnknownOIDException

setGCEvaluated

public void setGCEvaluated(long index,
                           long oid)
                    throws java.io.IOException,
                           UnknownOIDException

Throws:

java.io.IOException

UnknownOIDException

resetAllGCFlags

public void resetAllGCFlags()
                     throws java.io.IOException

Throws:

java.io.IOException

getGarbageObjects

public java.util.SortedMap<java.lang.Long,java.lang.Long> getGarbageObjects()
                                                                     throws java.io.IOException

Throws:

java.io.IOException

getReferencedOIDs

public java.util.Set<java.lang.Long> getReferencedOIDs()
                                                throws java.io.IOException

Throws:

java.io.IOException

remove

public void remove(long oid)
            throws java.io.IOException,
                   UnknownOIDException

Throws:

java.io.IOException

UnknownOIDException

moveEntries

public void moveEntries(DataStore store)
                 throws java.io.IOException

Throws:

java.io.IOException