mirror of
https://github.com/redis/redis.git
synced 2026-03-23 11:13:19 -04:00
c81813148b
Add a new module event `RedisModule_Event_Key`, this event is fired
when a key is removed from the keyspace.
The event includes an open key that can be used for reading the key before
it is removed. Modules can also extract the key-name, and use RM_Open
or RM_Call to access key from within that event, but shouldn't modify anything
from within this event.
The following sub events are available:
- `REDISMODULE_SUBEVENT_KEY_DELETED`
- `REDISMODULE_SUBEVENT_KEY_EXPIRED`
- `REDISMODULE_SUBEVENT_KEY_EVICTED`
- `REDISMODULE_SUBEVENT_KEY_OVERWRITE`
The data pointer can be casted to a RedisModuleKeyInfo structure
with the following fields:
```
RedisModuleKey *key; // Opened Key
```
### internals
* We also add two dict functions:
`dictTwoPhaseUnlinkFind` finds an element from the table, also get the plink of the entry.
The entry is returned if the element is found. The user should later call `dictTwoPhaseUnlinkFree`
with it in order to unlink and release it. Otherwise if the key is not found, NULL is returned.
These two functions should be used in pair. `dictTwoPhaseUnlinkFind` pauses rehash and
`dictTwoPhaseUnlinkFree` resumes rehash.
* We change `dbOverwrite` to `dbReplaceValue` which just replaces the value of the key and
doesn't fire any events. The "overwrite" part (which emits events) is just when called from `setKey`,
the other places that called dbOverwrite were ones that just update the value in-place (INCR*, SPOP,
and dbUnshareStringValue). This should not have any real impact since `moduleNotifyKeyUnlink` and
`signalDeletedKeyAsReady` wouldn't have mattered in these cases anyway (i.e. module keys and
stream keys didn't have direct calls to dbOverwrite)
* since we allow doing RM_OpenKey from withing these callbacks, we temporarily disable lazy expiry.
* We also temporarily disable lazy expiry when we are in unlink/unlink2 callback and keyspace
notification callback.
* Move special definitions to the top of redismodule.h
This is needed to resolve compilation errors with RedisModuleKeyInfoV1
that carries a RedisModuleKey member.
Co-authored-by: Oran Agra <oran@redislabs.com>
|
||
|---|---|---|
| .. | ||
| aclcheck.tcl | ||
| auth.tcl | ||
| basics.tcl | ||
| blockedclient.tcl | ||
| blockonbackground.tcl | ||
| blockonkeys.tcl | ||
| cluster.tcl | ||
| cmdintrospection.tcl | ||
| commandfilter.tcl | ||
| datatype.tcl | ||
| datatype2.tcl | ||
| defrag.tcl | ||
| eventloop.tcl | ||
| fork.tcl | ||
| getchannels.tcl | ||
| getkeys.tcl | ||
| hash.tcl | ||
| hooks.tcl | ||
| infotest.tcl | ||
| infra.tcl | ||
| keyspace_events.tcl | ||
| keyspecs.tcl | ||
| list.tcl | ||
| mallocsize.tcl | ||
| misc.tcl | ||
| moduleconfigs.tcl | ||
| postnotifications.tcl | ||
| propagate.tcl | ||
| publish.tcl | ||
| reply.tcl | ||
| scan.tcl | ||
| stream.tcl | ||
| subcommands.tcl | ||
| test_lazyfree.tcl | ||
| testrdb.tcl | ||
| timer.tcl | ||
| usercall.tcl | ||
| zset.tcl | ||