Examples with CloudUpdateValidator com.github.ambry.cloud.CloudUpdateValidator used on opensource projects

Example 1 with CloudUpdateValidator

use of com.github.ambry.cloud.CloudUpdateValidator in project ambry by linkedin.

the class AzureBlobDataAccessor method updateBlobMetadata.

/**
 * Update the metadata for the specified blob.
 * @param blobId The {@link BlobId} to update.
 * @param updateFields Map of field names and new values to modify.
 * @param cloudUpdateValidator {@link CloudUpdateValidator} validator for the update passed by the caller.
 * @return a {@link AzureCloudDestination.UpdateResponse} with the updated metadata.
 * @throws BlobStorageException if the blob does not exist or an error occurred.
 * @throws IllegalStateException on request timeout.
 */
public AzureCloudDestination.UpdateResponse updateBlobMetadata(BlobId blobId, Map<String, Object> updateFields, CloudUpdateValidator cloudUpdateValidator) throws Exception {
    Objects.requireNonNull(blobId, "BlobId cannot be null");
    updateFields.keySet().forEach(field -> Objects.requireNonNull(updateFields.get(field), String.format("%s cannot be null", field)));
    try {
        Timer.Context storageTimer = azureMetrics.blobUpdateTime.time();
        try {
            BlobProperties blobProperties = storageClient.getPropertiesWithResponse(blobId, defaultRequestConditions, requestTimeout);
            // Note: above throws 404 exception if blob does not exist.
            String etag = blobProperties.getETag();
            Map<String, String> metadata = blobProperties.getMetadata();
            if (!cloudUpdateValidator.validateUpdate(CloudBlobMetadata.fromMap(metadata), blobId, updateFields)) {
                return new AzureCloudDestination.UpdateResponse(false, metadata);
            }
            // Update only if any of the values have changed
            Map<String, String> changedFields = updateFields.entrySet().stream().filter(entry -> !String.valueOf(entry.getValue()).equals(metadata.get(entry.getKey()))).collect(Collectors.toMap(Map.Entry::getKey, entry -> String.valueOf(entry.getValue())));
            if (changedFields.size() > 0) {
                changedFields.forEach(metadata::put);
                if (updateCallback != null) {
                    try {
                        updateCallback.call();
                    } catch (Exception ex) {
                        logger.error("Error in update callback", ex);
                    }
                }
                // Set condition to ensure we don't clobber a concurrent update
                BlobRequestConditions blobRequestConditions = new BlobRequestConditions().setIfMatch(etag);
                storageClient.setMetadataWithResponse(blobId, metadata, blobRequestConditions, requestTimeout, Context.NONE);
                return new AzureCloudDestination.UpdateResponse(true, metadata);
            } else {
                return new AzureCloudDestination.UpdateResponse(false, metadata);
            }
        } finally {
            storageTimer.stop();
        }
    } catch (BlobStorageException e) {
        if (isNotFoundError(e.getErrorCode())) {
            logger.warn("Blob {} not found, cannot update {}.", blobId, updateFields.keySet());
        }
        if (e.getErrorCode() == BlobErrorCode.CONDITION_NOT_MET) {
            azureMetrics.blobUpdateConflictCount.inc();
        }
        throw e;
    }
}