hachikuji commented on a change in pull request #9512:
URL: https://github.com/apache/kafka/pull/9512#discussion_r537757487
##########
File path: raft/src/test/java/org/apache/kafka/raft/MockLog.java
##########
@@ -472,4 +490,106 @@ private EpochStartOffset(int epoch, long startOffset) {
}
}
+ final class MockRawSnapshotWriter implements RawSnapshotWriter {
+ private final OffsetAndEpoch snapshotId;
+ private ByteBufferOutputStream data;
+ private boolean frozen;
+
+ public MockRawSnapshotWriter(OffsetAndEpoch snapshotId) {
+ this.snapshotId = snapshotId;
+ this.data = new ByteBufferOutputStream(0);
+ this.frozen = false;
+ }
+
+ @Override
+ public OffsetAndEpoch snapshotId() {
+ return snapshotId;
+ }
+
+ @Override
+ public long sizeInBytes() {
+ return data.position();
+ }
+
+ @Override
+ public void append(ByteBuffer buffer) {
+ if (frozen) {
+ throw new RuntimeException("Snapshot is already frozen " +
snapshotId);
+ }
+
+ data.write(buffer);
+ }
+
+ @Override
+ public boolean isFrozen() {
+ return frozen;
+ }
+
+ @Override
+ public void freeze() {
+ if (frozen) {
+ throw new RuntimeException("Snapshot is already frozen " +
snapshotId);
+ }
+
+ frozen = true;
+ ByteBuffer buffer = data.buffer();
+ buffer.flip();
+
+ snapshots.putIfAbsent(snapshotId, new
MockRawSnapshotReader(snapshotId, buffer));
+ }
+
+ @Override
+ public void close() {}
+ }
+
+ final static class MockRawSnapshotReader implements RawSnapshotReader {
+ private final OffsetAndEpoch snapshotId;
+ private final MemoryRecords data;
+
+ MockRawSnapshotReader(OffsetAndEpoch snapshotId, ByteBuffer data) {
+ this.snapshotId = snapshotId;
+ this.data = MemoryRecords.readableRecords(data);
+ }
+
+ @Override
+ public OffsetAndEpoch snapshotId() {
+ return snapshotId;
+ }
+
+ @Override
+ public long sizeInBytes() {
+ return data.sizeInBytes();
+ }
+
+ @Override
+ public Iterator<RecordBatch> iterator() {
+ return new Iterator<RecordBatch>() {
Review comment:
nit: we cab use `covariantCast`?
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