Struct MetaCollector 

pub struct MetaCollector { /* private fields */ }

Accumulates metadata during processing with automatic tracing.

Every addition is traced at the appropriate level:

• add_section: DEBUG level
• add_issue: WARN level for warnings, ERROR for errors
• timed_section: INFO span with timing

Implementations

impl MetaCollector

pub fn new() -> Self

Create a new MetaCollector

pub fn add_section<T: Serialize>(&mut self, name: impl Into<String>, data: &T)

Add a named section with any serializable data. Automatically traces at DEBUG level.

pub fn merge_section<T: Serialize>(&mut self, name: impl Into<String>, data: &T)

Add or merge into a named section. If section exists and both are objects, merges keys.

pub fn get_section(&self, name: &str) -> Option<&Value>

Get a section by name

pub fn has_section(&self, name: &str) -> bool

Check if a section exists

pub fn add_issue(&mut self, issue: impl Into<String>)

Add an issue. Automatically traces at WARN or ERROR level.

pub fn add_issues(&mut self, issues: impl IntoIterator<Item = String>)

Add multiple issues

pub fn has_issues(&self) -> bool

Check if there are any issues

pub fn issues(&self) -> &[String]

Get all issues

pub fn set_input_rows(&mut self, rows: usize)

Set input row count

pub fn set_output_rows(&mut self, rows: usize)

Set output row count

pub fn set_rows(&mut self, input: usize, output: usize)

Set both input and output rows

pub fn input_rows(&self) -> Option<usize>

Get input rows

pub fn output_rows(&self) -> Option<usize>

Get output rows

pub fn timed_section(&mut self, name: impl Into<String>) -> TimedSection<'_>

Start a timed section with a tracing span.

Returns a TimedSection that must be finished via .finish() or .finish_with_data(). The elapsed time is recorded both to tracing and to the metadata.

pub fn elapsed_ms(&self) -> u64

Get elapsed time since collector creation

pub fn build(self) -> CollectedMeta

Build the final CollectedMeta

Trait Implementations

impl Debug for MetaCollector

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

Formats the value using the given formatter.

impl Default for MetaCollector

fn default() -> Self

Returns the “default value” for a type.