christophd opened a new issue, #2941:
URL: https://github.com/apache/camel-kamelets/issues/2941
## Description
The `aws-ddb-sink` Kamelet does not reliably set the DynamoDB operation via
its `operation` property. The Kamelet template sets the operation as an
Exchange property (`setProperty name=operation`), but this does not take effect
in all cases — most notably for `UpdateItem`.
The Kamelet template currently does this (in
`kamelets/aws-ddb-sink.kamelet.yaml`):
```yaml
template:
from:
uri: "kamelet:source"
steps:
- setProperty:
name: operation
constant: "{{operation}}"
- transformDataType:
toType: "aws2-ddb:application-json"
- to:
uri: "aws2-ddb:{{table}}"
parameters:
operation: "{{operation}}"
```
Even though `operation` is passed both as an Exchange property and as an
endpoint parameter, the `UpdateItem` operation is not applied correctly. This
caused the integration test `aws-ddb-sink-update-item.citrus.it.yaml` to fail
consistently, and the test was disabled.
## Steps to Reproduce
1. Use the `aws-ddb-sink` Kamelet with `operation=UpdateItem`
2. Send an update item JSON payload
3. The operation defaults to `PutItem` instead of `UpdateItem`
## Expected Behavior
The Kamelet should reliably apply the configured `operation` (e.g.
`UpdateItem`) when processing messages.
## Actual Behavior
The `UpdateItem` operation is not applied; the Kamelet falls back to the
default `PutItem` operation.
## Workaround
Setting the Exchange property `operation` in the calling route **before**
invoking the Kamelet sink works:
```yaml
- setProperty:
name: operation
constant: "{{aws.ddb.operation}}"
- to:
uri: "kamelet:aws-ddb-sink"
parameters:
operation: "{{aws.ddb.operation}}"
```
## Additional Context
- The test `aws-ddb-sink-update-item.citrus.it.yaml` has the workaround
applied and is now passing
- The root cause may be related to how the `kamelet:` component handles
property binding vs. Exchange property propagation — the `setProperty` inside
the Kamelet template may be overwritten or not propagated correctly through the
`transformDataType` step
- This may need investigation in `apache/camel` (the Kamelet runtime) rather
than a fix in the Kamelet template itself
_Claude Code on behalf of Christoph Deppisch_
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