Exports data changes for a replica.
ExportReplicaDataChanges(string ReplicaName, GDSExportOptions ExportOptions, esriGDSTransportType TransportType, esriExportGenerationsOption GenerationsToExport, boolean SwitchRole)
|
Parameter |
Description |
|
ReplicaName
|
Name of the replica. |
|
ExportOptions
|
Defines the output of the method. This includes
the outut format and whether or not the output will be compressed. See
GDSExportOptions for more information. |
|
TransportType
|
Defines how the client will be able to retrieve
the results. See esriGDSTransportType
for more information. |
|
GenerationsToExport
|
Specifies what data changes to export. You
may choose to export only unacknowledged data changes, only new data changes,
all data changes, or no data changes. You would export no data changes
if you were interested in switching roles (see below). See esriExportGenerationsOptions
for more information. |
|
SwitchRole
|
Set the SwitchRole parameter to true if after
exporting the data changes, you want to start receiving changes from the
relative replica. When set to true, the source replica transitions from
a data sender to a data receiver upon export. When the relative replica
successfully imports this delta file, it transitions from a data receiver
to a data sender. See the ImportReplicaDataChanges
method for more information. |
Return Value
A GDSData object.
Remarks
The process of synchronizing two replicas involves the following steps:
• Exporting changes from GeoDataServer / Replica 1.
• Importing them into GeoDataServer / Replica 2.
• Exporting an acknowledgement
from GeoDataServer / Replica 2 and importing it into 1.
The above steps send changes in one direction – from replica 1 to replica 2. In TwoWay synchronization changes are also sent in the opposite direction. The bullets above correspond to the methods ExportReplicaDataChanges, ImportReplicaDataChanges, ExportAcknowledgement and ImportAcknowledgement. The method ReExportReplicaDataChanges is used to re-export changes that were already sent. ImportReplicaDataChanges can also be used to import XML diff grams that are not part of a replica.
Examples