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Combine the domain and key arguments into a single value for convenience

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This commit is contained in:
Eelco Dolstra 2024-04-10 21:39:40 +02:00
parent aad11f4496
commit cceae30aaf
8 changed files with 84 additions and 99 deletions
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35
src/libfetchers/cache.hh
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@ -15,28 +15,35 @@ struct Cache
virtual ~Cache() { }
/**
* Add a value to the cache. The cache is an arbitrary mapping of
* Attrs to Attrs.
* A domain is a partition of the key/value cache for a particular
* purpose, e.g. "Git revision to revcount".
*/
using Domain = std::string_view;
/**
* A cache key is a domain and an arbitrary set of attributes.
*/
using Key = std::pair<Domain, Attrs>;
/**
* Add a key/value pair to the cache.
*/
virtual void upsert(
std::string_view domain,
const Attrs & key,
const Key & key,
const Attrs & value) = 0;
/**
* Look up a key with infinite TTL.
*/
virtual std::optional<Attrs> lookup(
std::string_view domain,
const Attrs & key) = 0;
const Key & key) = 0;
/**
* Look up a key. Return nothing if its TTL has exceeded
* `settings.tarballTTL`.
*/
virtual std::optional<Attrs> lookupWithTTL(
std::string_view domain,
const Attrs & key) = 0;
const Key & key) = 0;
struct Result
{
@ -49,8 +56,7 @@ struct Cache
* exceeded `settings.tarballTTL`.
*/
virtual std::optional<Result> lookupExpired(
std::string_view domain,
const Attrs & key) = 0;
const Key & key) = 0;
/**
* Insert a cache entry that has a store path associated with
@ -58,8 +64,7 @@ struct Cache
* associated store path is invalid.
*/
virtual void upsert(
std::string_view domain,
Attrs key,
Key key,
Store & store,
Attrs value,
const StorePath & storePath) = 0;
@ -74,8 +79,7 @@ struct Cache
* be valid, but it may be expired.
*/
virtual std::optional<ResultWithStorePath> lookupStorePath(
std::string_view domain,
Attrs key,
Key key,
Store & store) = 0;
/**
@ -83,8 +87,7 @@ struct Cache
* has exceeded `settings.tarballTTL`.
*/
virtual std::optional<ResultWithStorePath> lookupStorePathWithTTL(
std::string_view domain,
Attrs key,
Key key,
Store & store) = 0;
};