Struct PersistedMetadata

pub struct PersistedMetadata { /* private fields */ }

Available on crate feature receiver only.

Information about span / event [Metadata] that is serializable and thus can be persisted across multiple TracingEventReceiver lifetimes.

PersistedMetadata logically corresponds to a program executable (e.g., a WASM module), not to its particular execution (e.g., a WASM module instance). Multiple executions of the same executable can (and optimally should) share PersistedMetadata.

Implementations

impl PersistedMetadata

pub fn len(&self) -> usize

Returns the number of metadata entries.

pub fn is_empty(&self) -> bool

Checks whether this metadata collection is empty (i.e., no metadata was recorded yet).

pub fn iter(&self) -> impl Iterator<Item = (MetadataId, &CallSiteData)> + '_

Iterates over contained call site metadata together with the corresponding MetadataIds.

pub fn extend(&mut self, other: Self)

Merges entries from another PersistedMetadata instance.

Trait Implementations

impl Clone for PersistedMetadata

fn clone(&self) -> PersistedMetadata

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PersistedMetadata

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

Formats the value using the given formatter.

impl Default for PersistedMetadata

fn default() -> PersistedMetadata

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PersistedMetadata

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PersistedMetadata

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.