Creates an output delta file containing updates from an input replica.
The geodatabase may be a local geodatabase or a geodata service.
The output delta file can be a delta file geodatabase (.gdb), delta personal geodatabase (.mdb), or a delta XML file (.xml). When specifying the output delta file, you must include the appropriate suffix (.gdb, .mdb, or .xml).
This tool is used when synchronizing replica while disconnected. This is done by first running the Export Data Change Message tool which creates a delta file with changes to synchronize. The delta file is then copied to the relative replica and imported using the Import Message tool. If a delta file gets lost and you want to resend, you can use the Re-Export Unacknowledged Messages tool to regenerate the delta file. After the changes are imported, the relative replica can export an acknowledgment file using the Export Acknowledgement Message tool. The acknowledgment file is copied to the replica and imported using the Import Message tool. If an acknowledgment is not received, the next time changes are sent they will include the new changes plus the previously sent changes.
To synchronize replicas in a connected mode see the Synchronize Changes tool.
ExportDataChangeMessage_management (in_geodatabase, out_data_changes_file, in_replica, switch_to_receiver, include_unacknowledged_changes, include_new_changes)
Specifies the replica geodatabase from which to export the data change message. The geodatabase may be local or remote.
Specifies the delta file to export to.
The replica containing updates to be exported.
Indicates whether to change the role of the replica to that of a receiver. The receiver may not send replica updates until updates from the relative replica sender arrive.
Indicates whether to include data changes that have been previously exported for which no acknowledgment message has been received.
Indicates whether to include all data changes created since the last exported data change message.
ExportDataChangeMessage example 1 (Python window)
The following Python window script demonstrates how to use the ExportDataChangeMessage function in the Python window.
import arcpy from arcpy import env env.workspace = "C:/Data" arcpy.ExportDataChangeMessage_management("MySDEdata.sde", "Changes.gdb", "MyReplica1", "SWITCH", "TRUE", "TRUE")
ExportDataChangeMessage example 2 (stand-alone Python script)
The following Python script demonstrates how to use the ExportDataChangeMessage function in a stand-alone script.
# Name: ExportDataChangesMessage_Example2.py # Description: Exports a data change message to a delta file geodatabase (.gdb) # Import system modules import arcpy from arcpy import env # Set workspace env.workspace = "C:/Data" # Set local variables in_geodatabase = "MySDEdata.sde" out_dataChanges = "Changes.gdb" replica_name = "MyReplica1" switch_directions = "SWITCH" acknowledge = "TRUE" new_changes = "TRUE" # Execute ExportDataChangeMessage arcpy.ExportDataChangeMessage_management(in_geodatabase, out_dataChanges, replica_name, switch_directions, acknowledge, new_changes)
- ArcGIS for Desktop Basic: No
- ArcGIS for Desktop Standard: Yes
- ArcGIS for Desktop Advanced: Yes