Struct Schema 

pub struct Schema { /* private fields */ }

Domain Entity: Schema

Represents a versioned schema definition for event validation. Schemas define the structure and validation rules for event payloads.

Domain Rules:

• Subject cannot be empty
• Version starts at 1 and increments
• Schema must be valid JSON
• Once registered, schemas are immutable
• New versions must respect compatibility mode

Implementations

impl Schema

pub fn new( subject: String, version: u32, schema_definition: JsonValue, compatibility_mode: CompatibilityMode, ) -> Result<Self>

Create a new schema with validation

Arguments

• subject - The subject/topic this schema applies to (e.g., “order.placed”)
• version - Version number (must be >= 1)
• schema_definition - JSON Schema definition
• compatibility_mode - How to validate future schema changes

pub fn new_v1( subject: String, schema_definition: JsonValue, compatibility_mode: CompatibilityMode, ) -> Result<Self>

Create first version of a schema

pub fn reconstruct( id: Uuid, subject: String, version: u32, schema_definition: JsonValue, created_at: DateTime<Utc>, description: Option<String>, tags: Vec<String>, compatibility_mode: CompatibilityMode, ) -> Self

Reconstruct schema from storage (bypasses validation)

pub fn id(&self) -> Uuid

pub fn subject(&self) -> &str

pub fn version(&self) -> u32

pub fn schema_definition(&self) -> &JsonValue

pub fn created_at(&self) -> DateTime<Utc>

pub fn description(&self) -> Option<&str>

pub fn tags(&self) -> &[String]

pub fn compatibility_mode(&self) -> CompatibilityMode

pub fn set_description(&mut self, description: String) -> Result<()>

Add or update description

pub fn clear_description(&mut self)

Clear description

pub fn add_tag(&mut self, tag: String) -> Result<()>

Add a tag

pub fn remove_tag(&mut self, tag: &str) -> Result<()>

Remove a tag

pub fn has_tag(&self, tag: &str) -> bool

Check if schema has a specific tag

pub fn is_first_version(&self) -> bool

Check if this schema is the first version

pub fn applies_to(&self, subject: &str) -> bool

Check if this schema applies to a subject

pub fn create_next_version(&self, new_schema: JsonValue) -> Result<Schema>

Create next version of schema

Trait Implementations

impl Clone for Schema

fn clone(&self) -> Schema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Schema

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Schema

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<&Schema> for SchemaDto

fn from(schema: &Schema) -> Self

Converts to this type from the input type.

impl From<Schema> for SchemaDto

fn from(schema: Schema) -> Self

Converts to this type from the input type.

impl Serialize for Schema

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

where __S: Serializer,

Serialize this value into the given Serde serializer.