Struct DebugLog 

pub struct DebugLog { /* private fields */ }

Appends diagnostic lines to one file.

Implementations

impl DebugLog

pub fn from_env(adapter: &str) -> Option<Self>

Open the log named by the process environment, or None.

pub fn open(path: &str, adapter: &str) -> Option<Self>

Append to path, or return None when it cannot be opened.

Returning None rather than an error is deliberate: a diagnostic that refuses to start must not stop the application, and no caller has anything to do with the failure.

pub fn set_label(&self, label: &str)

Adopt the driver’s session id once the handshake supplies one, truncated to the eight characters the driver’s own log uses.

pub fn label(&self) -> String

The bracketed identifier on every line.

pub fn line(&self, category: Category, message: &str)

Write one line. Silently does nothing once the file is gone.

pub fn close(&self)

Close the file. Safe to call more than once.

Trait Implementations

impl Debug for DebugLog

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.