io.netty.handler.codec.mqtt.MqttUnacceptableProtocolVersionException Java Examples

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Example #1
Source File: MqttProtocolUtil.java    From ext-opensource-netty with Mozilla Public License 2.0 5 votes vote down vote up 
public static MqttConnectReturnCode connectReturnCodeForException(Throwable cause) {
	MqttConnectReturnCode code = MqttConnectReturnCode.CONNECTION_REFUSED_SERVER_UNAVAILABLE;
	if (cause instanceof MqttUnacceptableProtocolVersionException) {
		// 不支持的协议版本
		code = MqttConnectReturnCode.CONNECTION_REFUSED_UNACCEPTABLE_PROTOCOL_VERSION;
	} else if (cause instanceof MqttIdentifierRejectedException) {
		// 不合格的clientId
		code = MqttConnectReturnCode.CONNECTION_REFUSED_IDENTIFIER_REJECTED;
	} else {
		code = MqttConnectReturnCode.CONNECTION_REFUSED_SERVER_UNAVAILABLE;
	}
	return code;
}