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channelActive() — netty Function Reference

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

Function java Buffer Telemetry

Entity Profile

Dependency Diagram

graph TD
  72104b44_dd73_2bb4_7e67_a8a38918851d["channelActive()"]
  ccbda2b6_8f39_2dce_7583_46d91f6cccb1["MqttHeartBeatClientHandler"]
  72104b44_dd73_2bb4_7e67_a8a38918851d -->|defined in| ccbda2b6_8f39_2dce_7583_46d91f6cccb1
  style 72104b44_dd73_2bb4_7e67_a8a38918851d fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

example/src/main/java/io/netty/example/mqtt/heartBeat/MqttHeartBeatClientHandler.java lines 52–69

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        MqttFixedHeader connectFixedHeader =
                new MqttFixedHeader(MqttMessageType.CONNECT, false, MqttQoS.AT_MOST_ONCE, false, 0);
        MqttConnectVariableHeader connectVariableHeader =
                new MqttConnectVariableHeader(PROTOCOL_NAME_MQTT_3_1_1, PROTOCOL_VERSION_MQTT_3_1_1, true, true, false,
                                              0, false, false, 20, MqttProperties.NO_PROPERTIES);
        MqttConnectPayload connectPayload = new MqttConnectPayload(clientId,
                MqttProperties.NO_PROPERTIES,
                null,
                null,
                userName,
                password);
        MqttConnectMessage connectMessage =
                new MqttConnectMessage(connectFixedHeader, connectVariableHeader, connectPayload);
        ctx.writeAndFlush(connectMessage);
        System.out.println("Sent CONNECT");
    }

Domain

Subdomains

Defined In

Source

Frequently Asked Questions

What does channelActive() do?
channelActive() is a function in the netty codebase, defined in example/src/main/java/io/netty/example/mqtt/heartBeat/MqttHeartBeatClientHandler.java.
Where is channelActive() defined?
channelActive() is defined in example/src/main/java/io/netty/example/mqtt/heartBeat/MqttHeartBeatClientHandler.java at line 52.

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