A callback is a function invoked by a framework or runtime at a lifecycle event or processing opportunity. In a Fluent Bit Go input plugin, callbacks register the plugin, validate configuration, retrieve records, encode payloads, clean up, and exit. section 10.6.2
Callback
A callback is a function invoked by a framework or runtime in response to a lifecycle event or processing opportunity.
How Logs and Telemetry covers it
- How deep it goes
- Shows registration, initialization, processing, cleanup, and exit implementations, including configuration, encoding, state, and return codes.
- Examples
- Uses Go functions for registration, initialization, input processing, cleanup, and exit, with database records as input.
- What it assumes
- Assumes Go, plugin configuration, database retrieval, and C-compatible data handling through pointers and transformations.
- What you can do after
- Build it from scratch by implementing lifecycle callbacks for a Go-based Fluent Bit input plugin.
- How it connects
- Ties callbacks to input plugins, Go, database queries, MessagePack encoding, configuration validation, and return codes.
Also explained in
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Secrets of the JavaScript Ninja, Second EditionA function supplied to other code to be invoked later when a condition or event occurs.
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Data Pipelines with Apache Airflow, Second EditionA callback is a function supplied to another component so that it is invoked when a specified event occurs.
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The Well-Grounded Rubyist, Fourth EditionA callback is a method or function that a runtime invokes automatically in response to a specified event or lifecycle operation.
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Functional Programming in Scala, Second EditionA callback is a function supplied to an asynchronous operation so that the operation can report completion or a result later.
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Functional Programming in JavaScriptA programming pattern in which a function is passed to another operation to be invoked later, often for asynchronous control flow.
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BDD in Action, Second EditionA hook is a framework callback method that runs before or after a specified software execution event.
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Build an AI Agent (From Scratch)A callback is a callable supplied to software so it can be invoked automatically at a specified event or stage of execution.
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Refactoring to RustA callback function is a function supplied to another operation so that it can be invoked when a specified event or computation completes.
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React in DepthA callback function is a function supplied to another function or API to be invoked as part of that operation.
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Build Python Web Apps with StreamlitA callback is a function supplied to another component for execution in response to a later event.
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The Joy of JavaScriptA callback is a function passed as an argument to another function to be invoked later or in response to an event or condition.
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Deep Learning with R, Third EditionA Keras callback is an object invoked at specified points during model training or evaluation to monitor state or perform actions.
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Machine Learning for Tabular Data: XGBoost, Deep Learning, and AIA Keras callback is an object that runs user-defined actions at specified points during model training or evaluation.
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D3.js in Action, Third EditionA callback function is a function supplied to another operation so that it can be invoked when a specified event or processing step occurs.
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Deep Learning with Python, Third EditionA user-defined callback that runs automatically during training to perform extra actions such as monitoring outputs.
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Essential TypeScript 5, Third EditionA callback is a function supplied to another function or method so that it can be invoked later in response to an operation or event.
Compare how 18 books explain callback →
Related concepts
- call_onceused by · call_once is a threading operation that coordinates callers so a specified callback is successfully executed at most once for a given once-control object.
- replace body with callbackused by · A refactoring technique that extracts unchanged before-and-after code into a function and supplies the varying body as a callback argument.
- forEachused by · The JavaScript Array forEach method invokes a callback once for each assigned element of an array, in ascending index order.
- functionkind of · A function is a defined operation that maps inputs to outputs and, when implemented as a callable program unit, may also produce effects.
- event loopused by · An event loop is a runtime mechanism that repeatedly selects ready events or tasks and dispatches their associated work for execution.
This explainer was generated by Manning's knowledge graph from the text of Logs and Telemetry. The section links point to the parts of the book it draws on.