dengziming commented on a change in pull request #9819:
URL: https://github.com/apache/kafka/pull/9819#discussion_r563617104
##########
File path: clients/src/main/resources/common/message/FetchSnapshotResponse.json
##########
@@ -51,8 +51,8 @@
"about": "The total size of the snapshot." },
{ "name": "Position", "type": "int64", "versions": "0+",
"about": "The starting byte position within the snapshot included in
the Bytes field." },
- { "name": "Bytes", "type": "bytes", "versions": "0+", "zeroCopy": true,
- "about": "Snapshot data." }
+ { "name": "Bytes", "type": "records", "versions": "0+",
Review comment:
I have a question here, should we bump the version when changing the
name?
##########
File path:
clients/src/main/java/org/apache/kafka/common/protocol/SendBuilder.java
##########
@@ -137,6 +138,9 @@ public void writeRecords(BaseRecords records) {
if (records instanceof MemoryRecords) {
flushPendingBuffer();
addBuffer(((MemoryRecords) records).buffer());
+ } else if (records instanceof UnalignedMemoryRecords) {
Review comment:
Add a testZeroCopyUnalignedRecords
##########
File path:
clients/src/main/java/org/apache/kafka/common/record/UnalignedFileRecords.java
##########
@@ -0,0 +1,50 @@
+/*
+ * 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.
+ */
+package org.apache.kafka.common.record;
+
+import org.apache.kafka.common.network.TransferableChannel;
+
+import java.io.IOException;
+import java.nio.channels.FileChannel;
+
+/**
+ * Represents a file record set which is not necessarily offset-aligned
+ */
+public class UnalignedFileRecords implements UnalignedRecords {
+
+ private final FileChannel channel;
+ private final long position;
+ private final int size;
+
+ public UnalignedFileRecords(FileChannel channel, long position, int size) {
+ this.channel = channel;
+ this.position = position;
+ this.size = size;
+ }
+
+ @Override
+ public int sizeInBytes() {
+ return size;
+ }
+
+ @Override
+ public long writeTo(TransferableChannel destChannel, long
previouslyWritten, int remaining) throws IOException {
Review comment:
Add UnalignedFileRecordsTest
##########
File path:
raft/src/main/java/org/apache/kafka/snapshot/FileRawSnapshotWriter.java
##########
@@ -53,13 +56,20 @@ public long sizeInBytes() throws IOException {
}
@Override
- public void append(ByteBuffer buffer) throws IOException {
+ public void append(BaseRecords records) throws IOException {
if (frozen) {
throw new IllegalStateException(
- String.format("Append is not supported. Snapshot is already
frozen: id = %s; temp path = %s", snapshotId, tempSnapshotPath)
+ String.format("Append is not supported. Snapshot is
already frozen: id = %s; temp path = %s", snapshotId, tempSnapshotPath)
);
}
-
+ ByteBuffer buffer;
+ if (records instanceof MemoryRecords) {
+ buffer = ((MemoryRecords) records).buffer();
+ } else {
+ buffer = ByteBuffer.allocate(records.sizeInBytes());
+ ((FileRecords) records).channel().read(buffer);
+ buffer.flip();
+ }
Review comment:
Keep 2 methods here, one for MemoryRecords and one for
UnalignedMemoryRecords.
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