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cancel() — netty Function Reference

Architecture documentation for the cancel() function in DefaultHttp2RemoteFlowController.java from the netty codebase.

Function java Buffer Allocators calls 2 called by 2

Entity Profile

Dependency Diagram

graph TD
  8e51738b_ec39_64b4_209a_eaf98c44fe11["cancel()"]
  b2e83a60_2b9a_b7db_749c_dd2e3fd31ba6["FlowState"]
  8e51738b_ec39_64b4_209a_eaf98c44fe11 -->|defined in| b2e83a60_2b9a_b7db_749c_dd2e3fd31ba6
  580fd994_c3d5_2237_e59c_286ec9432b45["DefaultHttp2RemoteFlowController()"]
  580fd994_c3d5_2237_e59c_286ec9432b45 -->|calls| 8e51738b_ec39_64b4_209a_eaf98c44fe11
  8ff90321_aa45_54f3_2c52_ad6b0500f375["writeAllocatedBytes()"]
  8ff90321_aa45_54f3_2c52_ad6b0500f375 -->|calls| 8e51738b_ec39_64b4_209a_eaf98c44fe11
  a110deae_8883_0c41_048d_eacdf41def99["writeError()"]
  8e51738b_ec39_64b4_209a_eaf98c44fe11 -->|calls| a110deae_8883_0c41_048d_eacdf41def99
  c7b70004_1a90_09f1_9939_cc705b244d1d["stateCancelled()"]
  8e51738b_ec39_64b4_209a_eaf98c44fe11 -->|calls| c7b70004_1a90_09f1_9939_cc705b244d1d
  style 8e51738b_ec39_64b4_209a_eaf98c44fe11 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2RemoteFlowController.java lines 469–490

        void cancel(Http2Error error, Throwable cause) {
            cancelled = true;
            // Ensure that the queue can't be modified while we are writing.
            if (writing) {
                return;
            }

            FlowControlled frame = pendingWriteQueue.poll();
            if (frame != null) {
                // Only create exception once and reuse to reduce overhead of filling in the stacktrace.
                final Http2Exception exception = streamError(stream.id(), error, cause,
                        "Stream closed before write could take place");
                do {
                    writeError(frame, exception);
                    frame = pendingWriteQueue.poll();
                } while (frame != null);
            }

            streamByteDistributor.updateStreamableBytes(this);

            monitor.stateCancelled(this);
        }

Domain

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Defined In

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Called By

Source

Frequently Asked Questions

What does cancel() do?
cancel() is a function in the netty codebase, defined in codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2RemoteFlowController.java.
Where is cancel() defined?
cancel() is defined in codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2RemoteFlowController.java at line 469.
What does cancel() call?
cancel() calls 2 function(s): stateCancelled, writeError.
What calls cancel()?
cancel() is called by 2 function(s): DefaultHttp2RemoteFlowController, writeAllocatedBytes.

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