dox_cache 3.1.1

Cache for Dart and the Dox framework. Memory, file and Redis drivers, TTL, locks, tags and remember helpers.

3.1.1

• New: flexible takes a null stale. Then the value is kept until a refresh replaces it, so callers still get the last good value when compute fails.

3.1.0

• New: the file driver can delete expired and broken files by itself. Set the prune_every option (or FileDriver(pruneEvery: ...)) to run prune() in the background once every that many writes. It is off by default (0). Only one prune runs at a time, and a failed prune is ignored.
• Fix: FileDriver.prune() could delete a new value that add, increment or touch wrote at the same time. Now it takes the same key lock as they do and reads the file again under it. A key that is locked right now is skipped.

3.0.2

• Fix: remember and rememberForever threw on a cache hit when T was not a raw JSON type, like List<String>. Pass the new decode option to turn the cached JSON into T. Without it, T must be a raw JSON type.
• Fix: remember runs compute once when many calls for the same key run at the same time in one isolate. The others wait for the first. With the new lock: true, callers in other isolates and servers wait too.
• Fix: pull is atomic now. Redis uses GETDEL (needs Redis 6.2 or newer). Drivers get a new pull method.
• Fix: the file driver keeps each prefix in its own sub folder. flush deletes only the files of its own prefix, and keeps temp files of writes that are running.
• Change: because of this, files written by older versions are in the base folder and are not found any more. It is a cache, so they are only misses. You can delete the old files in the base folder by hand.
• Fix: a file driver read no longer deletes an expired or broken file. Another isolate may have just written a new value. Use the new FileDriver.prune() to delete expired and broken files.
• Fix: the file driver has locks now (File.create(exclusive: true)). add, increment and touch take a lock on the key, so they are safe across isolates.
• Fix: a Redis prefix with no : at the end gets one. So the prefix app does not match the keys of app2.
• New: flexible(key, fresh, stale, compute): stale while revalidate.
• New: touch(key, ttl) sets a new ttl and keeps the value.
• New: get and pull take a function as the default. It runs only on a miss.
• New: lock.block(timeout, callback) runs the callback while it holds the lock. It throws LockTimeoutException when the time is over. lock.forceRelease() frees a lock of any owner.
• New: the Redis option max_value_bytes.
• Faster: tagged many, putMany, has, pull and remember read the tag versions once per call.
• Faster: the memory driver keeps the expiry as int milliseconds. It does not read the clock for items with no expiry. has does not decode the value.
• Change: MemoryEntry.expiresAt is an int in milliseconds now. CacheClock has a new nowMs().

3.0.1

• Version bump only, to match the other packages.

3.0.0

• The first stable release.

3.0.0-rc.1

• Needs ioredis 3.0.1. It fixes a crash on disconnect when the Redis host is a name like localhost or redis.

3.0.0-alpha.17

• Version bump only, to match the other packages.

3.0.0-alpha.16

• Change: uses ioredis ^3.0.0, the first stable ioredis release.

3.0.0-alpha.15

• Version bump only, to match the other packages.

3.0.0-alpha.14

• Version bump only, to match the other packages.

3.0.0-alpha.13

• Version bump only, to match the other packages.

3.0.0-alpha.12

• Version bump only, to match the other packages.

3.0.0-alpha.11

• Version bump only, to match the other packages.

3.0.0-alpha.10

• Version bump only, to match the other packages.

3.0.0-alpha.9

• Version bump only, to match the other packages.

3.0.0-alpha.8

• Version bump only, to match the other packages.

3.0.0-alpha.7

• Perf: the memory driver removes expired items and expired locks in a sweep after many writes. Before, a key that was written once with a ttl and never read again stayed in memory forever.
• Perf: the memory driver with no max_size does not reorder the map on every hit. The order is only needed for LRU.
• Perf: a tagged cache reads all tag versions with one many call (one MGET on Redis). tags(...).flush() raises all tag versions at the same time. Before, each tag was one round trip after the other.
• Perf: the Redis driver frees a lock with EVALSHA. It sends the full script only when Redis does not know it yet.
• Perf: the file driver makes the cache folder only when it is missing. Before, it ran create(recursive: true) on every write. Lock tokens use one shared Random.secure().

3.0.0-alpha.6

• New CacheManager.close(). It closes the connections of every store that was built. The Redis driver closes its connection and its pool connections, with no reconnect. Memory, file and null stores do nothing. It is safe to call twice. A store used after it is built again.
• New CacheDriver.close(), for one driver. Custom drivers can override it. The default does nothing.

3.0.0-alpha.5

• Version bump only, to match the other packages.

3.0.0-alpha.4

• Version bump only, to match the other packages.

3.0.0-alpha.3

• New: getRaw(key) gives the stored value as JSON text, with no decode. Use it to send a cached value as a JSON response. Memory and Redis return the stored text as is. A stored String comes back with its quotes ("bar"). The stored format did not change, so old values still read the same.
• Faster get: a plain store builds the key with no async step. itemKey now returns FutureOr<String>. Memory get costs about 0.6 µs instead of 0.86 µs. Memory getRaw costs about 0.3 µs.
• New Redis option pool_size: the most connections one store opens (ioredis maxConnection). Default is 10, the same as before.
• Uses ioredis 2.0.0-alpha.2. It sends all commands on one shared connection and writes them together (auto-pipelining). A Redis read costs much less CPU. The cache now uses one connection per store, so pool_size rarely matters.

3.0.0-alpha.2

• Needs Dart 3.13 or newer.
• All dependencies updated to their latest versions.

3.0.0-alpha.1

• Uses ioredis 2. Redis error replies throw RedisError.
• Redis: no value size limit by default (was 60 KB). maxValueBytes is still there if you want one.
• Redis: many uses one MGET, putMany uses one pipeline, flush uses SCAN + DEL (no Lua).
• First release.
• CacheManager with named stores and custom drivers.
• Drivers: memory (with LRU), file, Redis, null.
• remember, pull, add, increment, many, tags and atomic locks.