Class TraceState

TraceState must be a class and not a simple object type because of the spec requirement (https://www.w3.org/TR/trace-context/#tracestate-field).

Here is the list of allowed mutations:

  • New key-value pair should be added into the beginning of the list
  • The value of any key can be updated. Modified keys MUST be moved to the beginning of the list.

Implements

Constructors

constructor

Methods

get serialize set unset

Constructors

constructor

Methods

get

  • get(key: string): undefined | string

    Returns the value to which the specified key is mapped, or undefined if this map contains no mapping for the key.

    Parameters

    • key: string

      with which the specified value is to be associated.

    Returns undefined | string

    the value to which the specified key is mapped, or undefined if this map contains no mapping for the key.

serialize

  • serialize(): string

    Serializes the TraceState to a list as defined below. The list is a series of list-members separated by commas ,, and a list-member is a key/value pair separated by an equals sign =. Spaces and horizontal tabs surrounding list-members are ignored. There can be a maximum of 32 list-members in a list.

    Returns string

    the serialized string.

set

unset

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