zhijiangW commented on a change in pull request #11515: [FLINK-16744][task]
implement channel state persistence for unaligned checkpoints
URL: https://github.com/apache/flink/pull/11515#discussion_r402133516
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/channel/ChannelStateWriter.java
##########
@@ -18,19 +18,51 @@
package org.apache.flink.runtime.checkpoint.channel;
import org.apache.flink.annotation.Internal;
+import org.apache.flink.runtime.checkpoint.CheckpointOptions;
import org.apache.flink.runtime.io.network.buffer.Buffer;
-import org.apache.flink.runtime.state.StateObject;
+import org.apache.flink.runtime.state.InputChannelStateHandle;
+import org.apache.flink.runtime.state.ResultSubpartitionStateHandle;
+import java.io.Closeable;
import java.util.Collection;
import java.util.Collections;
import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.Future;
/**
* Writes channel state during checkpoint/savepoint.
*/
@Internal
-public interface ChannelStateWriter extends AutoCloseable {
+public interface ChannelStateWriter extends Closeable {
+
+ /**
+ * Channel state write result.
+ */
+ class ChannelStateWriteResult {
+ final CompletableFuture<Collection<InputChannelStateHandle>>
inputChannelStateHandles;
+ final
CompletableFuture<Collection<ResultSubpartitionStateHandle>>
resultSubpartitionStateHandles;
+
+ ChannelStateWriteResult() {
+ this(new CompletableFuture<>(), new
CompletableFuture<>());
+ }
+
+
ChannelStateWriteResult(CompletableFuture<Collection<InputChannelStateHandle>>
i, CompletableFuture<Collection<ResultSubpartitionStateHandle>> r) {
Review comment:
nit: `i, r` give some meaningful names and split the arguments in separate
line.
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