Updating DataView items
Use the following event types to update DataView definitions.
Note: | In addition to the event types listed below, you can also use the DataViewAddOrUpdateItem event to either create new DataView items or to update existing ones. See Creating DataView items. |
DataViewUpdateItem
Create and route an event of this type to update a data item by specifying a sequence of new filed values. If the update does not succeed, a response is provided by a DataViewItemException event.
Here is an example of creating and routing a DataViewUpdateItem event:
using com.apama.dataview.DataViewUpdateItem;
...
string location;
integer temp;
integer humidity;
integer visibility;
...
DataViewUpdateItem update := new DataViewUpdateItem;
update.dvName := "Weather";
update.dvItemId := -1; // Set the ID to -1 when using keyFields
update.fieldValues :=
[location,temp.toString(),humidity.toString(),visibility.toString()];
route update;
DataViewUpdateItemDelta
Create and route an event of this type to update a data item by specifying a dictionary of field-position/field-value pairs. If the update does not succeed, a response is provided by a DataViewItemException event.
Here is an example of creating and routing a DataViewUpdateItemDelta event:
using com.apama.dataview.DataViewUpdateItemDelta;
...
string location;
integer temp;
integer humidity;
integer visibility;
...
DataViewUpdateItemDelta update := new DataViewUpdateItemDelta;
update.dvName := "Weather";
update.dvItemId := -1; // Set the ID to -1 when using keyFields.
update.fieldValues :=
{0:location,1:temp.toString(),2:humidity.toString(),
3:visibility.toString()};
route update;
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