Struct tracing_subscriber::fmt::format::Json[][src]

pub struct Json { /* fields omitted */ }
This is supported on crate feature fmt only.
Expand description

Marker for Format that indicates that the verbose JSON log format should be used.

The full format includes fields from all entered spans.

Example Output

{
    "timestamp":"Feb 20 11:28:15.096",
    "level":"INFO",
    "fields":{"message":"some message","key":"value"}
    "target":"mycrate",
    "span":{name":"leaf"},
    "spans":[{"name":"root"},{"name":"leaf"}],
}

Options

By default, event fields are not flattened, and both current span and span list are logged.

Implementations

If set to true event metadata will be flattened into the root object.

If set to false, formatted events won’t contain a field for the current span.

If set to false, formatted events won’t contain a list of all currently entered spans. Spans are logged in a list from root to leaf.

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Returns the “default value” for a type. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

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Mutably borrows from an owned value. Read more

Performs the conversion.

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Performs the conversion.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into #41263)

recently added

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The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

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