Enum Target 

pub enum Target {
    Local(String),
    Http(String),
    Grpc(GrpcTarget),
}

分支目标：进程内函数、远端 HTTP，还是远端 gRPC。

用 URI 前缀区分而不是加新字段 —— 这样落库格式不变，也跟 DTM 的 http URL 完全兼容，同一个事务里可以三种混用。

Variants

Local(String)

local://名字

Http(String)

http://... / https://...

Grpc(GrpcTarget)

grpc://host:port/包.服务/方法

Trait Implementations

impl Clone for Target

fn clone(&self) -> Target

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Target

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

Formats the value using the given formatter.

impl Eq for Target

impl PartialEq for Target

fn eq(&self, other: &Target) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Target