shunping commented on code in PR #37592:
URL: https://github.com/apache/beam/pull/37592#discussion_r2823234875
##########
sdks/java/extensions/google-cloud-platform-core/src/main/java/org/apache/beam/sdk/extensions/gcp/util/GcsUtilV2.java:
##########
@@ -259,6 +273,144 @@ public List<GcsPath> expand(GcsPath gcsPattern) throws
IOException {
return results;
}
+ public enum MissingStrategy {
+ FAIL_IF_MISSING,
+ SKIP_IF_MISSING,
+ }
+
+ public void remove(Iterable<GcsPath> paths, MissingStrategy strategy) throws
IOException {
+ for (List<GcsPath> pathPartition :
+ Lists.partition(Lists.newArrayList(paths), MAX_REQUESTS_PER_BATCH)) {
+
+ // Create a new empty batch every time
+ StorageBatch batch = storage.batch();
+ List<StorageBatchResult<Boolean>> batchResultFutures = new ArrayList<>();
+
+ for (GcsPath path : pathPartition) {
+ batchResultFutures.add(batch.delete(path.getBucket(),
path.getObject()));
+ }
+ batch.submit();
+
+ for (int i = 0; i < batchResultFutures.size(); i++) {
+ StorageBatchResult<Boolean> future = batchResultFutures.get(i);
+ try {
+ Boolean deleted = future.get();
+ if (!deleted) {
+ if (strategy == MissingStrategy.FAIL_IF_MISSING) {
+ throw new FileNotFoundException(
+ String.format(
+ "The specified file does not exist: %s",
pathPartition.get(i).toString()));
+ } else {
+ LOG.warn("Ignoring failed deletion on file {}.",
pathPartition.get(i).toString());
+ }
+ }
+ } catch (StorageException e) {
+ throw translateStorageException(pathPartition.get(i), e);
+ }
+ }
+ }
+ }
+
+ public enum OverwriteStrategy {
+ FAIL_IF_EXISTS, // Fail if target exists
+ SKIP_IF_EXISTS, // Skip if target exists
+ SAFE_OVERWRITE, // Overwrite only if the generation matches (atomic)
+ ALWAYS_OVERWRITE // Overwrite regardless of state
+ }
+
+ private void rewriteHelper(
+ Iterable<GcsPath> srcPaths,
+ Iterable<GcsPath> dstPaths,
+ boolean deleteSrc,
+ MissingStrategy srcMissing,
+ OverwriteStrategy dstOverwrite)
+ throws IOException {
+ List<GcsPath> srcList = Lists.newArrayList(srcPaths);
+ List<GcsPath> dstList = Lists.newArrayList(dstPaths);
+ checkArgument(
+ srcList.size() == dstList.size(),
+ "Number of source files %s must equal number of destination files %s",
+ srcList.size(),
+ dstList.size());
+
+ for (int i = 0; i < srcList.size(); i++) {
+ GcsPath srcPath = srcList.get(i);
+ GcsPath dstPath = dstList.get(i);
+ BlobId srcId = BlobId.of(srcPath.getBucket(), srcPath.getObject());
+ BlobId dstId = BlobId.of(dstPath.getBucket(), dstPath.getObject());
+
+ CopyRequest.Builder copyRequestBuilder =
+ CopyRequest.newBuilder()
+ .setSource(srcId)
+ .setMegabytesCopiedPerChunk(MEGABYTES_COPIED_PER_CHUNK);
+
+ if (dstOverwrite == OverwriteStrategy.ALWAYS_OVERWRITE) {
+ copyRequestBuilder.setTarget(dstId);
+ } else {
+ // FAIL_IF_EXISTS, SKIP_IF_EXISTS and SAFE_OVERWRITE require checking
the target blob
+ BlobInfo existingTarget;
+ try {
+ existingTarget = storage.get(dstId);
+ } catch (StorageException e) {
+ throw translateStorageException(dstPath, e);
+ }
+
+ if (existingTarget == null) {
+ copyRequestBuilder.setTarget(dstId,
Storage.BlobTargetOption.doesNotExist());
+ } else {
+ switch (dstOverwrite) {
+ case SKIP_IF_EXISTS:
+ LOG.warn("Ignoring rewriting from {} to {} because target
exists.", srcPath, dstPath);
+ continue; // Skip to next file in for-loop
+
+ case SAFE_OVERWRITE:
+ copyRequestBuilder.setTarget(
+ dstId,
Storage.BlobTargetOption.generationMatch(existingTarget.getGeneration()));
+ break;
+
+ case FAIL_IF_EXISTS:
+ default:
+ throw new FileAlreadyExistsException(
+ srcPath.toString(),
+ dstPath.toString(),
+ "Target object already exists and strategy is
FAIL_IF_EXISTS");
+ }
Review Comment:
Fixed.
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