com.sleepycat.je.tree
Class INKeyRep
java.lang.Object
com.sleepycat.je.tree.INArrayRep<INKeyRep,INKeyRep.Type,byte[]>
com.sleepycat.je.tree.INKeyRep
- Direct Known Subclasses:
- INKeyRep.Default, INKeyRep.MaxKeySize
public abstract class INKeyRep
- extends INArrayRep<INKeyRep,INKeyRep.Type,byte[]>
The abstract class that defines the various representation used to represent
the keys associated with the IN node. There are currently two supported
representations:
- A default representation
Default
that's capable of holding
any set of keys.
-
A compact representation
MaxKeySize
that's more efficient for
holding small keys (<= 16 bytes) in length. If key prefixing is in use this
represents the unprefixed part of the key, since that's what is stored in
this array.
The choice of representation is made when an IN node is first read in from
the log. The MaxKeySize
representation is only used when it is
more storage efficient than the default representation for the set of keys
currently associated with the IN.
Note that no attempt is currently made to optimize the storage
representation as keys are added to, or removed from, the
Default
representation to minimize the chances of transitionary
"back and forth" representation changes that could prove to be expensive.
Nested Class Summary |
static class |
INKeyRep.Default
The default representation that's capable of storing keys of any size. |
static class |
INKeyRep.MaxKeySize
The compact representation that can be used to represent keys <= 16
bytes in length. |
static class |
INKeyRep.Type
|
Methods inherited from class com.sleepycat.je.tree.INArrayRep |
calculateMemorySize, compact, copy, get, getType, length, noteRepChange, noteRepChange, set, updateCacheStats, updateCacheStats |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
INKeyRep
public INKeyRep(IN parent)
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