dennisylyung commented on a change in pull request #12583:
URL: https://github.com/apache/beam/pull/12583#discussion_r480169412
##########
File path:
sdks/java/io/amazon-web-services/src/main/java/org/apache/beam/sdk/io/aws/dynamodb/DynamoDBIO.java
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@@ -450,12 +459,35 @@ public void startBundle(StartBundleContext context) {
public void processElement(ProcessContext context) throws Exception {
final KV<String, WriteRequest> writeRequest =
(KV<String, WriteRequest>)
spec.getWriteItemMapperFn().apply(context.element());
+ if (spec.getOverwriteByPKeys() != null) {
+ removeDupPKeysRequestsIfAny(writeRequest.getValue());
+ }
batch.add(writeRequest);
if (batch.size() >= BATCH_SIZE) {
flushBatch();
}
}
+ private void removeDupPKeysRequestsIfAny(WriteRequest request) {
Review comment:
I think the later event is more preferred, although Apache beam do not
have strict ordering. Not sure why the AWS Python SDK is implemented this way.
I will try using something like a map.
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