module LittleGhost::ExecutionState

ExecutionState carries request-scoped values across fibers and the worker threads LittleGhost creates. It keeps event and instrumentation context from leaking between concurrent runs.

Framework extensions may use #capture and #with to preserve event and instrumentation context. Captured hashes are immutable; values within them are not deep-copied.

Public Class Methods

[] (key)

Source

# File lib/little_ghost/execution_state.rb, line 17
def [](key)
  state[key]
end

Reads key from the current execution state.

[]= (key, value)

Source

# File lib/little_ghost/execution_state.rb, line 22
def []=(key, value)
  replace(state.merge(key => value))
end

Replaces key in the current fiber-local state.

capture ()

Source

# File lib/little_ghost/execution_state.rb, line 34
def capture
  state
end

Captures the current immutable state hash for propagation.

delete (key)

Source

# File lib/little_ghost/execution_state.rb, line 27
def delete(key)
  value = state[key]
  replace(state.except(key))
  value
end

Deletes key and returns its previous value.

with (values) { || ... }

Source

# File lib/little_ghost/execution_state.rb, line 39
def with(values)
  previous = state
  replace(previous.merge(values))
  yield
ensure
  replace(previous)
end

Merges values while the block runs, then restores prior state.