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Posted to jira@kafka.apache.org by GitBox <gi...@apache.org> on 2021/06/18 21:19:54 UTC
[GitHub] [kafka] niket-goel commented on a change in pull request #10899: KAFKA-12952 Adding Delimeters to Metadata Snapshot File
niket-goel commented on a change in pull request #10899:
URL: https://github.com/apache/kafka/pull/10899#discussion_r654552376
##########
File path: clients/src/main/resources/common/message/MetadataSnapshotHeaderRecord.json
##########
@@ -0,0 +1,25 @@
+// Licensed to the Apache Software Foundation (ASF) under one or more
+// contributor license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright ownership.
+// The ASF licenses this file to You 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.
+
+{
+ "type": "data",
+ "name": "MetadataSnapshotHeaderRecord",
+ "validVersions": "0",
+ "flexibleVersions": "0+",
+ "fields": [
+ {"name": "Version", "type": "int16", "versions": "0+",
+ "about": "The version of the metadata snapshot file"}
Review comment:
Yep. Added in the next commit.
##########
File path: clients/src/main/java/org/apache/kafka/common/record/ControlRecordType.java
##########
@@ -43,9 +43,13 @@
public enum ControlRecordType {
ABORT((short) 0),
COMMIT((short) 1),
+
// Raft quorum related control messages.
- QUORUM_REASSIGNMENT((short) 2),
+ // TODO - ngoel
+ // Burn enum val 2 to prevent
+ // accidental corruption. (Consult with team)
Review comment:
Makes sense. Made the change in the next revision
##########
File path: raft/src/main/java/org/apache/kafka/snapshot/SnapshotWriter.java
##########
@@ -78,6 +81,52 @@ public SnapshotWriter(
);
}
+ /**
+ * FIXME ngoel Improve this comment
+ * Instantiates a SnapshotWriter and stamps the underlying
+ * snapshot with a @MetadataSnapshotHeaderRecord.
+ *
+ * @return {@link Optional}{@link SnapshotWriter}
+ */
+ public static <T> Optional<SnapshotWriter<T>> create(
+ Supplier<Optional<RawSnapshotWriter>> supplier,
+ int maxBatchSize,
+ MemoryPool memoryPool,
+ Time snapshotTime,
+ CompressionType compressionType,
+ RecordSerde<T> serde
+ ){
+ Optional<SnapshotWriter<T>> writer = supplier.get().map(snapshot -> {
+ return new SnapshotWriter<T>(
+ snapshot,
+ maxBatchSize,
+ memoryPool,
+ snapshotTime,
+ CompressionType.NONE,
+ serde
+ );
+ });
+ if (writer.isPresent()) {
+ //TODO ngoel Append Header
+ // Once the snapshot is intantiated assert that
+ // the snapshot file is 0 bytes and then append a
+ // header
+ SnapshotWriter<T> snapWriter = writer.get();
+ RawSnapshotWriter snapshot = snapWriter.snapshot;
+ if (snapshot.sizeInBytes() != 0){
+ throw new IllegalStateException("Initializing new snapshot with a non-empty file");
+ }
+ // Append the header control record.
+ // FIXME ngoel Where should we define the version?
+ short headerVersion = 0;
+ MetadataSnapshotHeaderRecord headerRecord = new MetadataSnapshotHeaderRecord().setVersion(headerVersion);
+ snapWriter.accumulator.appendSnapshotHeaderMessage(headerRecord);
+ snapWriter.accumulator.forceDrain();
+ snapWriter.close();
Review comment:
Good catch. Fixed in next version.
##########
File path: raft/src/main/java/org/apache/kafka/snapshot/SnapshotWriter.java
##########
@@ -78,6 +81,52 @@ public SnapshotWriter(
);
}
+ /**
+ * FIXME ngoel Improve this comment
+ * Instantiates a SnapshotWriter and stamps the underlying
+ * snapshot with a @MetadataSnapshotHeaderRecord.
+ *
+ * @return {@link Optional}{@link SnapshotWriter}
+ */
+ public static <T> Optional<SnapshotWriter<T>> create(
+ Supplier<Optional<RawSnapshotWriter>> supplier,
+ int maxBatchSize,
+ MemoryPool memoryPool,
+ Time snapshotTime,
+ CompressionType compressionType,
+ RecordSerde<T> serde
+ ){
+ Optional<SnapshotWriter<T>> writer = supplier.get().map(snapshot -> {
+ return new SnapshotWriter<T>(
+ snapshot,
+ maxBatchSize,
+ memoryPool,
+ snapshotTime,
+ CompressionType.NONE,
+ serde
+ );
+ });
+ if (writer.isPresent()) {
+ //TODO ngoel Append Header
+ // Once the snapshot is intantiated assert that
+ // the snapshot file is 0 bytes and then append a
+ // header
+ SnapshotWriter<T> snapWriter = writer.get();
+ RawSnapshotWriter snapshot = snapWriter.snapshot;
+ if (snapshot.sizeInBytes() != 0){
+ throw new IllegalStateException("Initializing new snapshot with a non-empty file");
+ }
+ // Append the header control record.
+ // FIXME ngoel Where should we define the version?
+ short headerVersion = 0;
+ MetadataSnapshotHeaderRecord headerRecord = new MetadataSnapshotHeaderRecord().setVersion(headerVersion);
+ snapWriter.accumulator.appendSnapshotHeaderMessage(headerRecord);
+ snapWriter.accumulator.forceDrain();
Review comment:
Done
##########
File path: .gitignore
##########
@@ -56,3 +56,8 @@ jmh-benchmarks/src/main/generated
raft/.jqwik-database
**/src/generated
**/src/generated-test
+
+.vim
+.bloop/
+.metals/
+bin/
Review comment:
Yes. Pushed by mistake. Fixed in next version.
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