Module header_codec 

Typed runtime primitives shared by request-header codec implementations.

This module deliberately exposes only protocol-reviewed wire value types and protocol-owned sinks. Both extension traits are sealed so adding a Rust type or sink cannot silently expand RocketMQ wire semantics in another crate.

Structs

BinarySink

An EncodeSink that writes canonical extension fields directly to a ROCKETMQ binary payload.

HeaderFieldContext

Static field metadata used for typed conversion and diagnostics.

HeaderFieldSpec

Static schema metadata for one non-flattened header field.

HeaderFlattenSpec

Static schema metadata for one flattened nested header.

JsonSink

An EncodeSink that writes one JSON extension-field object directly.

MapSink

An EncodeSink that appends typed fields directly to a HeaderMap.

ResolvedHeaderKey

Canonical resolution result for a canonical key or decode alias.

Enums

AliasConflictPolicy

Decode behavior when canonical and legacy alias keys coexist.

DynamicCollisionPolicy

Merge behavior between typed fields and dynamic extension fields.

FlattenPresenceSpec

Presence semantics for a flattened nested header.

HeaderPresence

Missing-field semantics recorded in generated header schemas.

HeaderRange

A signed Java numeric range applied to an unsigned Rust field.

HeaderValueKind

Protocol-reviewed value categories supported by typed request headers.

Traits

EncodeSink

A statically dispatched destination for typed header fields.

HeaderCodec

Statically dispatched codec contract for an explicit request-header schema.

HeaderFieldSource

A validated, borrowed view of remoting command extension fields.

HeaderValue

A protocol-approved request-header wire value.

Functions

validate_unsigned_java_range

Validates an unsigned value against its field-level signed Java range.