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Posted to pr@cassandra.apache.org by GitBox <gi...@apache.org> on 2020/04/02 15:32:47 UTC
[GitHub] [cassandra] sbtourist commented on a change in pull request #497:
Cassandra 15666 trunk
sbtourist commented on a change in pull request #497: Cassandra 15666 trunk
URL: https://github.com/apache/cassandra/pull/497#discussion_r402406186
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File path: src/java/org/apache/cassandra/streaming/StreamSession.java
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@@ -156,18 +166,57 @@
private final NettyStreamingMessageSender messageSender;
private final ConcurrentMap<ChannelId, Channel> incomingChannels = new ConcurrentHashMap<>();
- private final AtomicBoolean isAborted = new AtomicBoolean(false);
+ // "maybeCompleted()" should be executed at most once. Because it can be executed asynchronously by IO
+ // threads(serialization/deserialization) and stream messaging processing thread, causing connection closed before
+ // receiving peer's CompleteMessage.
+ private final AtomicBoolean maybeCompleted = new AtomicBoolean(false);
+ private final AtomicBoolean isClosed = new AtomicBoolean(false);
+ private Future closeFuture;
+
private final UUID pendingRepair;
private final PreviewKind previewKind;
+ /**
+ * State Transition:
+ *
+ * <pre>
+ *
+ * +------------------+----------> FAILED <------------------+
+ * | | ^ |
+ * | | | |
+ * INITIALIZED --> PREPARING --> STREAMING ----------> WAIT_COMPLETE ----> COMPLETED
+ * | | ^ ^
+ * | | if preview | |
+ * | +--------------------------------------+ |
+ * | nothing to request or to transfer |
+ * +---------------------------------------------------------------------------+
+ * nothing to request or to transfer
+ *
+ * </pre>
+ */
public enum State
{
- INITIALIZED,
- PREPARING,
- STREAMING,
- WAIT_COMPLETE,
- COMPLETE,
- FAILED,
+ INITIALIZED(false),
+ PREPARING(false),
+ STREAMING(false),
+ WAIT_COMPLETE(false),
+ COMPLETE(true),
+ FAILED(true);
+
+ private final boolean finalState;
+
+ State(boolean finalState)
+ {
+ this.finalState = finalState;
+ }
+
+ /**
+ * @return true if current statu is final and cannot be change to other state.
Review comment:
nit: `statu` -> `status`, `change` -> `changed`.
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