LangEx.NodeError exception (LangEx v0.11.3)

Structured failure of a graph node.

Graph execution returns {:error, %LangEx.NodeError{}} when a node raises (after its retry policy, if any, is exhausted) or its task exits. The failing node name is in :node and the original exception or exit reason is preserved in :reason, so callers can pattern match on the underlying cause:

{:error, %LangEx.NodeError{node: :fetch, reason: %Req.TransportError{}}} =
  LangEx.invoke(graph, input)

Summary

Types

t()

Functions

wrap(node, error, stacktrace)

Wraps a raised exception or exit reason, preserving existing wrappers.

Types

t()

@type t() :: %LangEx.NodeError{
  __exception__: true,
  node: atom(),
  reason: term(),
  stacktrace: Exception.stacktrace()
}

Functions

wrap(node, error, stacktrace)

@spec wrap(atom(), term(), Exception.stacktrace()) :: t()

Wraps a raised exception or exit reason, preserving existing wrappers.