reuvenlax commented on code in PR #24145:
URL: https://github.com/apache/beam/pull/24145#discussion_r1063765063
##########
sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/StorageApiWritesShardedRecords.java:
##########
@@ -385,34 +399,57 @@ public void process(
Supplier<String> getOrCreateStream =
() -> getOrCreateStream(tableId, streamName, streamOffset,
idleTimer, datasetService);
- Function<Boolean, AppendClientInfo> getAppendClientInfo =
- createAppendClient -> {
- try {
- @Nullable
- TableSchema tableSchema =
- messageConverters
- .get(element.getKey().getKey(), dynamicDestinations,
datasetService)
- .getTableSchema();
- AppendClientInfo info =
- new AppendClientInfo(
- tableSchema,
- // Make sure that the client is always closed in a
different thread to avoid
- // blocking.
- client -> runAsyncIgnoreFailure(closeWriterExecutor,
client::close));
- if (createAppendClient) {
- info = info.createAppendClient(datasetService,
getOrCreateStream, false);
- }
- return info;
- } catch (Exception e) {
- throw new RuntimeException(e);
- }
- };
-
AtomicReference<AppendClientInfo> appendClientInfo =
new AtomicReference<>(
- APPEND_CLIENTS.get(element.getKey(), () ->
getAppendClientInfo.apply(true)));
+ APPEND_CLIENTS.get(
+ element.getKey(),
+ () -> {
+ @Nullable TableSchema tableSchema;
+ if (autoUpdateSchema && updatedSchema.read() != null) {
+ // We've seen an updated schema, so we use that.
+ tableSchema = updatedSchema.read();
+ } else {
+ // Start off with the base schema. As we get notified of
schema updates, we
+ // will
+ // update the
+ // descriptor.
+ tableSchema =
+ messageConverters
+ .get(element.getKey().getKey(),
dynamicDestinations, datasetService)
+ .getTableSchema();
+ }
+ return AppendClientInfo.of(
+ tableSchema,
+ // Make sure that the client is always closed in a
different thread to
+ // avoid
+ // blocking.
+ client ->
runAsyncIgnoreFailure(closeWriterExecutor, client::close))
+ .withAppendClient(datasetService, getOrCreateStream,
false);
+ }));
+ if (autoUpdateSchema && updatedSchema.read() != null) {
+ if (appendClientInfo.get().hasSchemaChanged(updatedSchema.read())) {
+ appendClientInfo.set(
+ AppendClientInfo.of(
+ updatedSchema.read(),
appendClientInfo.get().getCloseAppendClient()));
+ // TODO: invalidate?
Review Comment:
I _think_ that put() will invalidate the old value
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