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92
v2/common/src/main/java/com/google/cloud/teleport/v2/cdc/dlq/PubSubNotifiedDlqIO.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| /* | ||
| * Copyright (C) 2024 Google LLC | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not | ||
| * use this file except in compliance with the License. You may obtain a copy of | ||
| * the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the | ||
| * License for the specific language governing permissions and limitations under | ||
| * the License. | ||
| */ | ||
| package com.google.cloud.teleport.v2.cdc.dlq; | ||
|
|
||
| import java.io.FileNotFoundException; | ||
| import java.io.IOException; | ||
| import java.util.List; | ||
| import org.apache.beam.sdk.io.FileSystems; | ||
| import org.apache.beam.sdk.io.fs.MatchResult.Metadata; | ||
| import org.apache.beam.sdk.io.gcp.pubsub.PubsubIO; | ||
| import org.apache.beam.sdk.io.gcp.pubsub.PubsubMessage; | ||
| import org.apache.beam.sdk.transforms.DoFn; | ||
| import org.apache.beam.sdk.transforms.PTransform; | ||
| import org.apache.beam.sdk.transforms.ParDo; | ||
| import org.apache.beam.sdk.values.PBegin; | ||
| import org.apache.beam.sdk.values.PCollection; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| /** | ||
| * This is a DLQ reconsumer where the DLQ files reside in the GCS and the file path comes as a | ||
| * PubSub message. It also skips files under specific configured directories , such as temporary and | ||
| * severe, so that even if there are misconfigrations done when setting the GCS notifier, the list | ||
| * of directories to ignore can be configured. | ||
| */ | ||
| public class PubSubNotifiedDlqIO extends PTransform<PBegin, PCollection<Metadata>> { | ||
| private static final Logger LOG = LoggerFactory.getLogger(PubSubNotifiedDlqIO.class); | ||
|
|
||
| private final String gcsNotificationSubscription; | ||
| private final List<String> filePathsToIgnore; | ||
|
|
||
| public PubSubNotifiedDlqIO(String gcsNotificationSubscription, List<String> filePathsToIgnore) { | ||
| this.gcsNotificationSubscription = gcsNotificationSubscription; | ||
| this.filePathsToIgnore = filePathsToIgnore; | ||
| } | ||
|
|
||
| @Override | ||
| public PCollection<Metadata> expand(PBegin input) { | ||
| return input | ||
| .apply( | ||
| "ReadGcsPubSubSubscription", | ||
| PubsubIO.readMessagesWithAttributes().fromSubscription(gcsNotificationSubscription)) | ||
| .apply("ExtractGcsFilePath", ParDo.of(new ExtractGcsFileForRetry())); | ||
| } | ||
|
|
||
| class ExtractGcsFileForRetry extends DoFn<PubsubMessage, Metadata> { | ||
| @ProcessElement | ||
| public void process(ProcessContext context) throws IOException { | ||
| PubsubMessage message = context.element(); | ||
| String eventType = message.getAttribute("eventType"); | ||
| String bucketId = message.getAttribute("bucketId"); | ||
| String objectId = message.getAttribute("objectId"); | ||
| if (eventType.equals("OBJECT_FINALIZE") && !objectId.endsWith("/")) { | ||
| String fileName = "gs://" + bucketId + "/" + objectId; | ||
| try { | ||
| Metadata fileMetadata = FileSystems.matchSingleFileSpec(fileName); | ||
| if (filePathsToIgnore != null) { | ||
| for (String filePathToIgnore : filePathsToIgnore) { | ||
| if (fileMetadata.resourceId().toString().contains(filePathToIgnore)) { | ||
| LOG.info( | ||
| "Ignoring severe or temporary file during retry processing {} due to ignore" | ||
| + " path {} ", | ||
| fileName, | ||
| filePathToIgnore); | ||
| return; | ||
| } | ||
| } | ||
| } | ||
| context.output(fileMetadata); | ||
| } catch (FileNotFoundException e) { | ||
| LOG.warn("Ignoring non-existent file {}", fileName, e); | ||
| } catch (IOException e) { | ||
| LOG.error("GCS Failure retrieving {}", fileName, e); | ||
| throw e; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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