Oscarcheng0312 opened a new pull request, #7693:
URL: https://github.com/apache/incubator-seata/pull/7693
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- [x] I have read the
[CONTRIBUTING.md](https://github.com/apache/incubator-seata/blob/2.x/CONTRIBUTING.md)
guidelines.
- [x] I have registered the PR
[changes](https://github.com/apache/incubator-seata/tree/2.x/changes).
## Ⅰ. Describe what this PR did
Add the **core connection-pool monitoring implementation**
(transport-agnostic) for CPM backend.
**Domain / Model**
- `ConnectionPoolInfo`: runtime snapshot DTO for pool metrics.
**Providers**
- `DruidConnectionPoolMetrics`: collect metrics from Druid.
- `HikariConnectionPoolMetrics`: collect metrics from HikariCP.
**Collector**
- `DataSourceConnectionPoolCollector`: aggregate metrics from multiple
providers.
**Service**
- `ConnectionPoolMonitor`: periodic collection and read APIs.
**Cache**
- `ConnectionPoolInfoCache`: in-memory storage for fast reads.
> This PR **does not** include any private protocol / networking code (Netty
/ gRPC).
> Transport (Netty/gRPC/REST) will be integrated in a follow-up PR to keep
layering clean.
---
## Ⅱ. Does this pull request fix one issue?
No. It introduces the core capability for connection-pool-monitor backend,
independent of transport.
---
## Ⅲ. Why don't you add test cases (unit test/integration test)?
Basic unit tests will be added with the follow-up PR.
---
## Ⅳ. Describe how to verify it
This PR introduces transport-agnostic core logic only. Verification will be
provided by
follow-up unit tests that cover providers (Druid/Hikari), the collector, the
monitor, and the cache.
Those tests will be sufficient to validate the functionality end-to-end
without requiring a running console.
---
## Ⅴ. Special notes for reviews
- All new Java files include ASF headers.
- No Netty/gRPC classes are included in this PR; those will live under in a
separate PR.
- The design keeps **providers → collector → monitor → cache** independent
from transport for easy pluggability.
- Package structure will be refined after backend transport abstraction
(gRPC integration) is finalized.
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