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Fix 'MultiDbClient' compatibility with client-side cache-enabled configuration - #4568
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Pull request overview
This PR fixes client-side caching (CSC) for MultiDbClient by propagating a shared Cache instance from MultiDbClientBuilder into MultiDbConnectionProvider, then down into TrackingConnectionPool so cache-enabled connections continue to work across database switches and pool recreation.
Changes:
- Thread
CachefromMultiDbClientBuilder→MultiDbConnectionProvider→TrackingConnectionPool/ConnectionFactory(and preserve it onTrackingConnectionPool.from()pool recreation). - Add cache-focused integration tests for multi-db CSC behavior (including fast-failover/pool recreation and dynamic database addition).
- Speed up existing integration tests by disabling health checks for most scenarios.
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.
| File | Description |
|---|---|
| src/main/java/redis/clients/jedis/mcf/MultiDbConnectionProvider.java | Adds cache-aware constructor and passes Cache into pool creation. |
| src/main/java/redis/clients/jedis/mcf/TrackingConnectionPool.java | Extends builder to accept Cache and ensures recreated pools keep the same cache. |
| src/main/java/redis/clients/jedis/builders/MultiDbClientBuilder.java | Passes builder cache into MultiDbConnectionProvider. |
| src/test/java/redis/clients/jedis/MultiDbClientTest.java | Adds CSC integration coverage and updates tests to avoid health-check waits in most cases. |
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- add tests to assert midtransaction failure in multidbtransaction
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Cursor Bugbot has reviewed your changes using default effort and found 1 potential issue.
Reviewed by Cursor Bugbot for commit 6fc5518. Configure here.
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| // Create the multi-database connection provider | ||
| MultiDbConnectionProvider provider = new MultiDbConnectionProvider(multiDbConfig); | ||
| MultiDbConnectionProvider provider = new MultiDbConnectionProvider(multiDbConfig, cache); |
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Custom provider hides client cache
Medium Severity
If MultiDbClient is built with a preconfigured MultiDbConnectionProvider that was constructed with a Cache, connections use client-side caching but UnifiedJedis.getCache() stays null unless the same Cache is also passed on the builder.
Additional Locations (1)
Reviewed by Cursor Bugbot for commit 6fc5518. Configure here.
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Summary
This PR fixes client-side caching support with
MultiDbConnectionProviderby threading theCacheinstance through the connection provider and pool layers.Changes
Core Implementation
MultiDbConnectionProvider: Added new constructor acceptingCacheparameter and updated pool creation to pass cache toTrackingConnectionPoolTrackingConnectionPool: Extended builder pattern to accept and propagateCachethrough connection factory and pool recreationMultiDbClientBuilder: Updated to pass cache instance when constructingMultiDbConnectionProviderKey Features
Testing
Added comprehensive test coverage including:
MultiDbClientTest Improvements
Files Changed
MultiDbConnectionProvider.java- Added cache support with dual constructorsTrackingConnectionPool.java- Enhanced builder to accept and propagate cacheMultiDbClientBuilder.java- Updated provider instantiation to include cacheMultiDbClientTest.java- Added 4 new cache-related tests and improved existing testsNote
Medium Risk
Changes affect multi-database connection pooling and cache invalidation on failover/switch; incorrect cache sharing could serve stale data across endpoints, though behavior is heavily tested.
Overview
MultiDbClient can now use client-side caching (CSC) by passing the builder’s
CacheintoMultiDbConnectionProvider, throughTrackingConnectionPool/ConnectionFactory, so pooled connections becomeCacheConnectionwhen a cache is configured. The same cache instance is reused when pools are rebuilt viaTrackingConnectionPool.from()(e.g. after fast failover closes the old pool).MultiDbClientBuilderconstructs the provider withcache; the original single-arg provider constructor remains for non-cached setups.Tests add RESP2/RESP3 parameterization for
MultiDbClientTest, CSC integration scenarios (switches, dynamic DB add, pool recreation),RedisMultiDbClientSideCacheTest, mock-serverMultiDbCSCTest(flush on fast-failover switch vs no flush otherwise), and coverage for mid-transaction active-database switches onMultiDbTransaction.Reviewed by Cursor Bugbot for commit 6fc5518. Bugbot is set up for automated code reviews on this repo. Configure here.