esphome::logger::LogListener Class Reference

Interface for receiving log messages without std::function overhead. More...

#include <logger.h>

Inheritance diagram for esphome::logger::LogListener:

Public Member Functions
virtual void	on_log (uint8_t level, const char *tag, const char *message, size_t message_len)=0

Detailed Description

Interface for receiving log messages without std::function overhead.

Components can implement this interface instead of using lambdas with std::function to reduce flash usage from std::function type erasure machinery.

Usage: class MyComponent : public Component, public LogListener { public: void setup() override { if (logger::global_logger != nullptr) logger::global_logger->add_log_listener(this); } void on_log(uint8_t level, const char *tag, const char *message, size_t message_len) override { // Handle log message } };

Definition at line 62 of file logger.h.

Member Function Documentation

on_log()

virtual void esphome::logger::LogListener::on_log ( uint8_t level, const char * tag, const char * message, size_t message_len )

pure virtual

Implemented in esphome::api::APIServer, esphome::ble_nus::BLENUS, esphome::logger::LoggerMessageTrigger, esphome::mqtt::MQTTClientComponent, esphome::syslog::Syslog, and esphome::web_server::WebServer.

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The documentation for this class was generated from the following file:

• esphome/components/logger/logger.h