[ISSUE #3470]🚀Enhance HAConnectionState with additional methods for state management and transitions✨ #3471
Conversation
…tate management and transitions✨
WalkthroughThe Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant StateMachine as HAConnectionStateMachine
participant State as HAConnectionState
participant Error as HAConnectionStateError
Client->>StateMachine: transition_to(new_state)
StateMachine->>State: can_transition_to(new_state)
alt Valid transition
State-->>StateMachine: true
StateMachine->>StateMachine: Update state, increment count
StateMachine-->>Client: Ok
else Invalid transition
State-->>StateMachine: false
StateMachine->>Error: Create InvalidTransition error
StateMachine-->>Client: Err(InvalidTransition)
end
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Actionable comments posted: 1
🧹 Nitpick comments (3)
rocketmq-store/src/ha/ha_connection_state.rs (3)
360-365: Remove redundant pattern inis_regression_transition
(Transfer, Shutdown)is already covered by(_, Shutdown).
Keeping both is harmless but noisy; dropping the specific arm reduces cognitive load.
163-174: Question default-to-Ready on unknown stringsSilently mapping unknown input to
Readycan hide configuration / deserialization errors.
Consider returning aResultor falling back toErr(InvalidValue)instead of a silent default.
42-53: Use a const slice instead of allocating aVec
all_statesalways returns the same fixed data; a&'static [Self]avoids allocation:pub const ALL_STATES: &[HAConnectionState] = &[ HAConnectionState::Ready, HAConnectionState::Handshake, HAConnectionState::Transfer, HAConnectionState::Suspend, HAConnectionState::Shutdown, ];Callers can iterate or convert to
Vecwhen necessary.
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rocketmq-store/src/ha/ha_connection_state.rs(2 hunks)
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| /// Check if the connection can transition to the given state | ||
| pub fn can_transition_to(&self, target: HAConnectionState) -> bool { | ||
| use HAConnectionState::*; | ||
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| match (self, target) { | ||
| // From Ready | ||
| (Ready, Handshake) => true, | ||
| (Ready, Shutdown) => true, | ||
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| // From Handshake | ||
| (Handshake, Transfer) => true, | ||
| (Handshake, Shutdown) => true, | ||
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| // From Transfer | ||
| (Transfer, Suspend) => true, | ||
| (Transfer, Shutdown) => true, | ||
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| // From Suspend | ||
| (Suspend, Transfer) => true, | ||
| (Suspend, Shutdown) => true, | ||
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| // From Shutdown (terminal state) | ||
| (Shutdown, _) => false, | ||
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| // Same state | ||
| (state, target) if state == &target => true, | ||
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| // Invalid transitions | ||
| _ => false, | ||
| } | ||
| } |
There was a problem hiding this comment.
Fix ordering bug – Shutdown ➜ Shutdown falsely marked invalid
The (Shutdown, _) => false arm precedes the “same-state” arm, so
can_transition_to(Shutdown, Shutdown) wrongly returns false.
Swap the check order or add a specific (Shutdown, Shutdown) case before the catch-all.
- // From Shutdown (terminal state)
- (Shutdown, _) => false,
-
- // Same state
- (state, target) if state == &target => true,
+ // Same state
+ (state, target) if state == &target => true,
+
+ // From Shutdown (terminal state) to any **other** state
+ (Shutdown, _) => false,Without this, the state machine can never acknowledge an already-terminated connection.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| /// Check if the connection can transition to the given state | |
| pub fn can_transition_to(&self, target: HAConnectionState) -> bool { | |
| use HAConnectionState::*; | |
| match (self, target) { | |
| // From Ready | |
| (Ready, Handshake) => true, | |
| (Ready, Shutdown) => true, | |
| // From Handshake | |
| (Handshake, Transfer) => true, | |
| (Handshake, Shutdown) => true, | |
| // From Transfer | |
| (Transfer, Suspend) => true, | |
| (Transfer, Shutdown) => true, | |
| // From Suspend | |
| (Suspend, Transfer) => true, | |
| (Suspend, Shutdown) => true, | |
| // From Shutdown (terminal state) | |
| (Shutdown, _) => false, | |
| // Same state | |
| (state, target) if state == &target => true, | |
| // Invalid transitions | |
| _ => false, | |
| } | |
| } | |
| /// Check if the connection can transition to the given state | |
| pub fn can_transition_to(&self, target: HAConnectionState) -> bool { | |
| use HAConnectionState::*; | |
| match (self, target) { | |
| // From Ready | |
| (Ready, Handshake) => true, | |
| (Ready, Shutdown) => true, | |
| // From Handshake | |
| (Handshake, Transfer) => true, | |
| (Handshake, Shutdown) => true, | |
| // From Transfer | |
| (Transfer, Suspend) => true, | |
| (Transfer, Shutdown) => true, | |
| // From Suspend | |
| (Suspend, Transfer) => true, | |
| (Suspend, Shutdown) => true, | |
| // Same state | |
| (state, target) if state == &target => true, | |
| // From Shutdown (terminal state) to any **other** state | |
| (Shutdown, _) => false, | |
| // Invalid transitions | |
| _ => false, | |
| } | |
| } |
🤖 Prompt for AI Agents
In rocketmq-store/src/ha/ha_connection_state.rs lines 80 to 110, the match arms
in can_transition_to incorrectly return false for the transition from Shutdown
to Shutdown because the catch-all Shutdown arm comes before the same-state
check. Fix this by either moving the same-state arm before the Shutdown
catch-all or adding a specific (Shutdown, Shutdown) arm before the (Shutdown, _)
arm to correctly allow this transition.
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #3471 +/- ##
==========================================
+ Coverage 26.47% 26.59% +0.11%
==========================================
Files 545 545
Lines 77759 77961 +202
==========================================
+ Hits 20583 20730 +147
- Misses 57176 57231 +55 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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Which Issue(s) This PR Fixes(Closes)
Fixes #3470
Brief Description
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