public static class EngineWrapper.ReadOnlyEngine extends EngineWrapper
Engine and throws
UnsupportedOperationException("Read-only")
on any modification attempt.EngineWrapper.CloseOnJVMShutdown, EngineWrapper.ImmutabilityCheckEngine, EngineWrapper.ReadOnlyEngine, EngineWrapper.SerializerCheckEngineWrapper, EngineWrapper.SynchronizedEngineWrapperCLOSEDCATALOG_RECID, CHECK_RECORD, CLASS_INFO_RECID, LAST_RESERVED_RECID| Constructor and Description |
|---|
ReadOnlyEngine(Engine engine) |
| Modifier and Type | Method and Description |
|---|---|
boolean |
canSnapshot() |
void |
commit()
Makes all changes made since the previous commit/rollback permanent.
|
<A> boolean |
compareAndSwap(long recid,
A expectedOldValue,
A newValue,
Serializer<A> serializer)
Updates existing record in atomic (Compare And Swap) manner.
|
<A> void |
delete(long recid,
Serializer<A> serializer)
Remove existing record from store/cache
Recid must be a number returned by 'put' method.
|
boolean |
isReadOnly()
Check if you can write into this Engine.
|
long |
preallocate()
Preallocates recid for not yet created record.
|
void |
preallocate(long[] recids)
Preallocates recids for not yet created record.
|
<A> long |
put(A value,
Serializer<A> serializer)
Insert new record.
|
void |
rollback()
Undoes all changes made in the current transaction.
|
Engine |
snapshot()
Returns read-only snapshot of data in Engine.
|
<A> void |
update(long recid,
A value,
Serializer<A> serializer)
Update existing record with new value.
|
canRollback, checkClosed, clearCache, close, closeListenerRegister, closeListenerUnregister, compact, get, getSerializerPojo, getWrappedEngine, isClosedpublic ReadOnlyEngine(Engine engine)
public long preallocate()
Enginepreallocate in interface Enginepreallocate in class EngineWrapperpublic void preallocate(long[] recids)
Enginepreallocate in interface Enginepreallocate in class EngineWrapperrecids - array to put result intopublic <A> boolean compareAndSwap(long recid,
A expectedOldValue,
A newValue,
Serializer<A> serializer)
EngineoldValue==expectedOldValue when old value is found in instance cacheoldValue using serializer and checking oldValue.equals(expectedOldValue)expectedOldValue using serializer and comparing binary array with already serialized oldValue
compareAndSwap in interface EnginecompareAndSwap in class EngineWrapperrecid - (record identifier) under which record was persisted.expectedOldValue - old value to be compared with existing recordnewValue - to be written if values are matchingserializer - used to serialize record into binary formpublic <A> long put(A value,
Serializer<A> serializer)
Engineput in interface Engineput in class EngineWrappervalue - records to be addedserializer - used to convert record into/from binary formpublic <A> void update(long recid,
A value,
Serializer<A> serializer)
Engineupdate in interface Engineupdate in class EngineWrapperrecid - (record identifier) under which record was persisted.value - new record value to be storedserializer - used to serialize record into binary formpublic <A> void delete(long recid,
Serializer<A> serializer)
Enginedelete in interface Enginedelete in class EngineWrapperrecid - (record identifier) under which was record persistedserializer - which may be used in some circumstances to deserialize and store old objectpublic void commit()
Enginecommit in interface Enginecommit in class EngineWrapperpublic void rollback()
EngineUnsupportedOperationException.rollback in interface Enginerollback in class EngineWrapperpublic boolean isReadOnly()
EngineisReadOnly in interface EngineisReadOnly in class EngineWrapperpublic boolean canSnapshot()
canSnapshot in interface EnginecanSnapshot in class EngineWrapperpublic Engine snapshot() throws java.lang.UnsupportedOperationException
Enginesnapshot in interface Enginesnapshot in class EngineWrapperjava.lang.UnsupportedOperationException - if snapshots are not supported/enabledEngineWrapper.canSnapshot()