Struct PresentationMarketData 

pub struct PresentationMarketData {
    pub item_name: String,
    pub item_pos: usize,
    pub fields: MarketFields,
    pub changed_fields: MarketFields,
    pub is_snapshot: bool,
}

Representation of market data received from the IG Markets streaming API

Fields

item_name: String

Name of the item this data belongs to

item_pos: usize

Position of the item in the subscription

fields: MarketFields

All market fields

changed_fields: MarketFields

Fields that have changed in this update

is_snapshot: bool

Whether this is a snapshot or an update

Implementations

impl PresentationMarketData

pub fn from_fields( item_name: Option<&str>, item_pos: usize, is_snapshot: bool, fields: &HashMap<String, Option<String>>, changed_fields: &HashMap<String, Option<String>>, ) -> Result<Self, String>

Builds a PresentationMarketData from pre-extracted streaming fields.

This is transport-agnostic: it takes plain field maps rather than a Lightstreamer ItemUpdate, so the presentation layer carries no dependency on the streaming transport. The ItemUpdate adapter lives in crate::application::streaming_convert.

Arguments

• item_name - Subscription item name (None when subscribed by position)
• item_pos - 1-based position of the item in the subscription
• is_snapshot - Whether this update is a snapshot
• fields - Current field values for the item
• changed_fields - Field values that changed in this update

Returns

• Result<Self, String> - The converted MarketData or an error message

Trait Implementations

impl Clone for PresentationMarketData

fn clone(&self) -> PresentationMarketData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PresentationMarketData

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

Formats the value using the given formatter.

impl Default for PresentationMarketData

fn default() -> PresentationMarketData

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PresentationMarketData

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for PresentationMarketData

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

Formats the value using the given formatter.

impl From<&ItemUpdate> for PresentationMarketData

fn from(item_update: &ItemUpdate) -> Self

Converts to this type from the input type.

impl Serialize for PresentationMarketData

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.