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@@ -45,6 +45,10 @@ namespace experimental {
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/// PRE_RECV means an interception between the time that a certain
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/// operation has been requested and it is available. POST_RECV means that a
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/// result is available but has not yet been passed back to the application.
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+/// A batch of interception points will only contain either PRE or POST hooks
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+/// but not both types. For example, a batch with PRE_SEND hook points will not
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+/// contain POST_RECV or POST_SEND ops. Likewise, a batch with POST_* ops can
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+/// not contain PRE_* ops.
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enum class InterceptionHookPoints {
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/// The first three in this list are for clients and servers
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PRE_SEND_INITIAL_METADATA,
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@@ -52,8 +56,8 @@ enum class InterceptionHookPoints {
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POST_SEND_MESSAGE,
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PRE_SEND_STATUS, // server only
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PRE_SEND_CLOSE, // client only: WritesDone for stream; after write in unary
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- /// The following three are for hijacked clients only and can only be
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- /// registered by the global interceptor
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+ /// The following three are for hijacked clients only. A batch with PRE_RECV_*
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+ /// hook points will never contain hook points of other types.
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PRE_RECV_INITIAL_METADATA,
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PRE_RECV_MESSAGE,
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PRE_RECV_STATUS,
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Yash Tibrewal