public interface ChangeReader
Modifier and Type | Interface and Description |
---|---|
static interface |
ChangeReader.Change
A change operation that is part of a ChangeTxn; used only by
SyncProcessor implementations and custom sources of change set
information.
|
static interface |
ChangeReader.ChangeTxn
A transaction that contains one or more Changes; used only by
SyncProcessor implementations and custom sources of change set
information.
|
static class |
ChangeReader.ChangeType
The operation type of a Change; used only by SyncProcessor
implementations and custom sources of change set information.
|
Modifier and Type | Method and Description |
---|---|
void |
discardChanges(Transaction txn)
Called when the changes in all transactions returned by the
getChangeTxns iterator have been transferred to the external system, and
they can be discarded locally.
|
java.util.Iterator<ChangeReader.ChangeTxn> |
getChangeTxns()
Returns an iterator over all transactions containing changes for one of
the data sets of interest (specified by SyncProcessor.getChangeSet and
indirectly by SyncProcessor.sync or syncAll).
|
java.util.Iterator<ChangeReader.ChangeTxn> getChangeTxns()
If a single transaction applies to more than one change set, a separate transaction will be returned by the iterator.
If this method is called more than once for a given change set, the information returned may be different each time, because changes may be discarded by ChangeTxn.discardChanges and additional changes may appear as they are being written.
void discardChanges(Transaction txn)
The changes will not be discarded until the given txn has been committed. By using an XA transaction, the changes can be discarded locally only if they are also committed in the external system.
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