Svc::ActiveTextLogger Component

1. Introduction

The Svc::ActiveTextLogger component processes log texts from other components. The logs are written to standard output and optionally to a file.

2. Requirements

The requirements for Svc::ActiveTextLogger are as follows:

Requirement	Description	Verification Method
ISF-ATL-001	The `Svc::ActiveTextLogger` component shall print received log texts to standard output.	Unit Test; Inspection
ISF-ATL-002	The `Svc::ActiveTextLogger` component shall write received log texts to an optionally supplied file.	Unit Test
ISF-ATL-003	The `Svc::ActiveTextLogger` component shall format the passed log text on the calling thread context, and perform all other processing on the component's thread.	Inspection
ISF-ATL-004	The `Svc::ActiveTextLogger` component shall stop writing to the optional file if it would exceed its max size.	Unit Test
ISF-ATL-005	The `Svc::ActiveTextLogger` component shall provide a public method to supply the filename to write to and max size.	Unit Test
ISF-ATL-006	The `Svc::ActiveTextLogger` component shall attempt to create a new file to write to if the supplied one already exists. It will try up to ten times, by adding an integer suffix to the filename, ie "file","file0","file1"..."file9"	Unit Test

3. Design

3.1 Context

3.1.1 Component Diagram

The Svc::ActiveTextLogger component has the following component diagram:

`Svc::ActiveTextLogger` Diagram

3.1.2 Ports

The Svc::ActiveTextLogger component uses the following port types:

Port Data Type	Name	Direction	Kind	Usage
`Fw::LogText`	TextLogger	Input	Synchronous	Logging port

3.2 Functional Description

The Svc::ActiveTextLogger component provides a text logging function for the software that maintains consistent ordering by writing the logs from a thread.

3.2.1 File Writing

Once a valid file and max size is supplied via a public function call, the Svc::ActiveTextLogger component writes to that file as well as standard output. The Svc::ActiveTextLogger component will stop writing to the file if it would exceed the maximum size.

If the file supplied already exists, the Svc::ActiveTextLogger component will attempt to create a new file up to ten times by appending an integer suffix to end of the file name.