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userEventTriggered() — netty Function Reference

Architecture documentation for the userEventTriggered() function in MqttHeartBeatClientHandler.java from the netty codebase.

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Entity Profile

Dependency Diagram

graph TD
  7020c294_ab79_df1c_59b7_1fbfe1a583cd["userEventTriggered()"]
  ccbda2b6_8f39_2dce_7583_46d91f6cccb1["MqttHeartBeatClientHandler"]
  7020c294_ab79_df1c_59b7_1fbfe1a583cd -->|defined in| ccbda2b6_8f39_2dce_7583_46d91f6cccb1
  style 7020c294_ab79_df1c_59b7_1fbfe1a583cd fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

example/src/main/java/io/netty/example/mqtt/heartBeat/MqttHeartBeatClientHandler.java lines 71–82

    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
        if (evt instanceof IdleStateEvent) {
            MqttFixedHeader pingreqFixedHeader =
                    new MqttFixedHeader(MqttMessageType.PINGREQ, false, MqttQoS.AT_MOST_ONCE, false, 0);
            MqttMessage pingreqMessage = new MqttMessage(pingreqFixedHeader);
            ctx.writeAndFlush(pingreqMessage);
            System.out.println("Sent PINGREQ");
        } else {
            super.userEventTriggered(ctx, evt);
        }
    }

Domain

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Defined In

Source

Frequently Asked Questions

What does userEventTriggered() do?
userEventTriggered() is a function in the netty codebase, defined in example/src/main/java/io/netty/example/mqtt/heartBeat/MqttHeartBeatClientHandler.java.
Where is userEventTriggered() defined?
userEventTriggered() is defined in example/src/main/java/io/netty/example/mqtt/heartBeat/MqttHeartBeatClientHandler.java at line 71.

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