AshAuthentication.
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Cache for BankID HTTPClient to avoid re-reading and decoding certificates on every request.
This module uses :persistent_term to cache the HTTPClient globally after first initialization.
The client is created once on first use and reused for all subsequent requests.
Performance Impact
Without caching:
- Every BankID API request reads 3 certificate files from disk
- Every request decodes PEM to DER format
- Significant I/O and CPU overhead
With caching:
- Certificates loaded once on first request
- All subsequent requests use cached client
- Near-zero overhead for certificate handling
Usage
# Get cached client (initializes on first call)
client = AshAuthentication.BankID.HTTPClientCache.get()
# Use with BankID functions
{:ok, auth} = BankID.authenticate(ip, http_client: client)Summary
Functions
@spec clear() :: :ok
Clear the cached HTTPClient.
This is primarily useful for testing or when certificate configuration changes. In production, you typically never need to call this.
@spec get() :: BankID.HTTPClient.t()
Get the cached HTTPClient, initializing it if needed.
The client is initialized once on first call and cached globally using :persistent_term.
Subsequent calls return the cached instance with zero overhead.
Returns
BankID.HTTPClient.t() - The cached HTTP client instance