Make Cache Configurable#75
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dfuchss merged 36 commits intoJul 15, 2026
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- add new redis cache replacement strategy
…pdate CacheManager to support initialization from ModuleConfiguration
…tegy to be more generic
…RedisCache to simplify as a regular cache
…e/add-cache-configurations # Conflicts: # src/main/java/edu/kit/kastel/sdq/lissa/ratlr/configuration/EvaluationConfiguration.java
dfuchss
marked this pull request as draft
April 29, 2026 19:13
…ature/add-cache-configurations # Conflicts: # src/test/java/edu/kit/kastel/sdq/lissa/ratlr/ArchitectureTest.java
…ions - aside from the local cache dir for replication - from individual environment variables.
…ion, and backward compatibility checks
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…e non-empty list. Also fail fast if configured caches are unavailable
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dfuchss
approved these changes
Jun 24, 2026
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| static <K extends CacheKey> Cache<K> createByType( | ||
| CacheType type, CacheParameter<K> parameters, @Nullable String cacheDir, @Nullable ObjectMapper mapper) { | ||
| return switch (type) { | ||
| case LOCAL -> new LocalCache<>(cacheDir, parameters); | ||
| case REDIS -> new RedisCache<>(parameters, mapper); | ||
| }; |
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
|
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| String jsonValue; | ||
| try { | ||
| jsonValue = mapper.writeValueAsString(Objects.requireNonNull(value)); | ||
| } catch (JsonProcessingException e) { | ||
| throw new IllegalArgumentException("Could not serialize object", e); | ||
| } |
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| import redis.clients.jedis.RedisClient; | ||
| import redis.clients.jedis.UnifiedJedis; |
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| String redisUrl = "redis://localhost:6379"; | ||
| if (Environment.getenv("REDIS_URL") != null) { | ||
| redisUrl = Environment.getenv("REDIS_URL"); | ||
| } | ||
| jedis = RedisClient.create(redisUrl); | ||
| // Check if connection is working | ||
| jedis.ping(); |
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| static <K extends CacheKey> Cache<K> createByType( | ||
| CacheType type, CacheParameter<K> parameters, @Nullable String cacheDir, @Nullable ObjectMapper mapper) { | ||
| return switch (type) { | ||
| case LOCAL -> new LocalCache<>(cacheDir, parameters); | ||
| case REDIS -> new RedisCache<>(parameters, mapper); | ||
| }; | ||
| } |
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| @SuppressWarnings("unchecked") | ||
| static <T> @Nullable T convert(@Nullable String jsonData, Class<T> clazz, ObjectMapper mapper) { | ||
| if (jsonData == null) { | ||
| return null; | ||
| } | ||
| try { | ||
| return mapper.readValue(jsonData, clazz); | ||
| } catch (JsonProcessingException e) { | ||
| // Backward compatibility for unserialized String values | ||
| if (clazz == String.class) { | ||
| return (T) jsonData; | ||
| } | ||
| throw new IllegalArgumentException("Could not deserialize object", e); | ||
| } | ||
| } |
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| static <K extends CacheKey> Cache<K> createByType( | ||
| CacheType type, CacheParameter<K> parameters, @Nullable String cacheDir, @Nullable ObjectMapper mapper) { | ||
| return switch (type) { | ||
| case LOCAL -> new LocalCache<>(cacheDir, parameters); | ||
| case REDIS -> new RedisCache<>(parameters, mapper); | ||
| }; | ||
| } |
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| * @param type The cache type name (case-insensitive) | ||
| * @param cacheDir The directory for local cache storage | ||
| * @param parameters The cache parameters | ||
| * @param mapper The ObjectMapper for JSON operations |
| e); | ||
| } | ||
| } | ||
| return cacheTypes; |
| } | ||
|
|
||
| @Override | ||
| public boolean containsKey(String key) { |
| 2. Set environment variables if needed: | ||
| - `CACHE_HIERARCHY=REDIS,LOCAL` to use Redis with local fallback | ||
| - `REDIS_URL=redis://your-redis-host:6379` if not using the default | ||
| 3. If Redis is unavailable, but configured to be used the system will fail. |
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This PR aims to make caches in LiSSA configurable.
Caching with REST-Redis as in #59 can be added afterwards.
The current Redis and Local Cache implementations are split into independent implementations of the Cache interface. Instead, a new Cache, the hierarchical Cache, is added to define how two caches can be coupled. Hierarchical caches can also be coupled with another hierarchical cache. If values are missing in any level of the cache hierarchy, they will be propagated.
The CacheReplacementStrategy Enum describes different conflict resolution strategies (None / Error / Overwrite).
The strategy and general cache hierarchy are defined in environment variables with the defaults of local cache and no consequences on cache conflicts.
The internal local cache implementation has not been altered to keep support for existing local cache files. Their location continues to be specified by the configuration file to enable effortless replication.