Struct Exchange 

pub struct Exchange {
    pub input: Message,
    pub output: Option<Message>,
    pub properties: HashMap<String, Value>,
    pub error: Option<CamelError>,
    pub pattern: ExchangePattern,
    pub correlation_id: String,
}

An Exchange represents a message being routed through the framework.

It contains the input message, an optional output message, properties for passing data between processors, and error state.

Fields

input: Message

The input (incoming) message.

output: Option<Message>

The output (response) message, populated for InOut patterns.

properties: HashMap<String, Value>

Exchange-scoped properties for passing data between processors.

error: Option<CamelError>

Error state, if processing failed.

pattern: ExchangePattern

The exchange pattern.

correlation_id: String

Unique correlation ID for distributed tracing.

Implementations

impl Exchange

pub fn new(input: Message) -> Self

Create a new exchange with the given input message.

pub fn new_in_out(input: Message) -> Self

Create a new exchange with the InOut pattern.

pub fn correlation_id(&self) -> &str

Get the correlation ID for this exchange.

pub fn property(&self, key: &str) -> Option<&Value>

Get a property value.

pub fn set_property(&mut self, key: impl Into<String>, value: impl Into<Value>)

Set a property value.

pub fn has_error(&self) -> bool

Check if the exchange has an error.

pub fn set_error(&mut self, error: CamelError)

Set an error on this exchange.

Trait Implementations

impl Clone for Exchange

fn clone(&self) -> Exchange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Exchange

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

Formats the value using the given formatter.

impl Default for Exchange

fn default() -> Self

Returns the “default value” for a type.

impl Service<Exchange> for IdentityProcessor

type Response = Exchange

Responses given by the service.

type Error = CamelError

Errors produced by the service.

type Future = Pin<Box<dyn Future<Output = Result<Exchange, CamelError>> + Send>>

The future response value.

fn poll_ready(&mut self, _cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>

Returns Poll::Ready(Ok(())) when the service is able to process requests.

fn call(&mut self, exchange: Exchange) -> Self::Future

Process the request and return the response asynchronously.

impl<F, Fut> Service<Exchange> for ProcessorFn<F>

where F: Fn(Exchange) -> Fut + Send + Sync + 'static, Fut: Future<Output = Result<Exchange, CamelError>> + Send + 'static,

type Response = Exchange

Responses given by the service.

type Error = CamelError

Errors produced by the service.

type Future = Pin<Box<dyn Future<Output = Result<Exchange, CamelError>> + Send>>

The future response value.

fn poll_ready(&mut self, _cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>

Returns Poll::Ready(Ok(())) when the service is able to process requests.

fn call(&mut self, exchange: Exchange) -> Self::Future

Process the request and return the response asynchronously.