Struct SchemaCache 

pub struct SchemaCache<C = UreqClient>
where
    C: HttpClient,
{ /* private fields */ }

A disk-backed cache for JSON Schema files.

Schemas are fetched via HTTP and stored as <cache_dir>/<hash>.json where <hash> is a hex-encoded hash of the URI. When a schema is requested, the cache is checked first; on a miss the schema is fetched and written to disk for future use.

Implementations

impl<C> SchemaCache<C>

where C: HttpClient,

pub fn new(cache_dir: Option<PathBuf>, client: C) -> SchemaCache<C>

pub fn fetch( &self, uri: &str, ) -> Result<(Value, CacheStatus), Box<dyn Error + Send + Sync>>

Fetch a schema by URI, using the disk cache when available.

Returns the parsed schema and a CacheStatus indicating whether the result came from the disk cache, the network, or caching was disabled.

Errors

Returns an error if the schema cannot be fetched from the network, read from disk cache, or parsed as JSON.

Trait Implementations

impl<C> AsyncRetrieve for SchemaCache<C>

where C: HttpClient,

fn retrieve<'life0, 'life1, 'async_trait>( &'life0 self, uri: &'life1 Uri<String>, ) -> Pin<Box<dyn Future<Output = Result<Value, Box<dyn Error + Send + Sync>>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, SchemaCache<C>: 'async_trait,

Asynchronously retrieve a resource from the given URI.

impl<C> Clone for SchemaCache<C>

where C: Clone + HttpClient,

fn clone(&self) -> SchemaCache<C>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<C> Retrieve for SchemaCache<C>

where C: HttpClient,

fn retrieve( &self, uri: &Uri<String>, ) -> Result<Value, Box<dyn Error + Send + Sync>>

Attempt to retrieve a resource from the given URI.