Fix sequence counting #34
Conversation
WalkthroughA new PHP file named Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant Swoole
participant Goridge
Client->>Swoole: Start Coroutine
Swoole->>Goridge: Create RPC Instance
Goridge->>Goridge: Call App.Hi('Antony')
Goridge-->>Swoole: Return Result
Swoole-->>Client: Output Result
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Actionable comments posted: 3
🧹 Outside diff range and nitpick comments (4)
examples/swoole.php (2)
14-17: Consider using more specific Swoole hook flags.While using
SWOOLE_HOOK_ALLensures all possible hooks are enabled, it might be overly broad for your specific use case. Consider using more targeted hook flags to potentially improve performance.The use of the barrier for synchronization is a good practice for managing concurrent coroutines.
You might want to replace
SWOOLE_HOOK_ALLwith a combination of specific flags that are necessary for your use case. For example:Co::set(['hook_flags' => SWOOLE_HOOK_TCP | SWOOLE_HOOK_UDP | SWOOLE_HOOK_UNIX]);Adjust the flags based on your specific requirements.
24-26: LGTM: Proper use of barrier and overall structure.The use of
Barrier::wait($barrier)ensures all coroutines complete before the script exits, which is a good practice. The overall structure usingCo\Runis correct for Swoole coroutine usage.For improved clarity, consider adding a comment explaining the purpose of the barrier wait:
// Wait for all coroutines to complete before exiting Barrier::wait($barrier);tests/Goridge/RPC.php (1)
253-304: LGTM: New test methodtestCallSequenceadded.The new test method thoroughly verifies the sequence of calls made to the RPC service, ensuring that each call increments the sequence number correctly. It aligns well with the changes made to use instance-based sequence management in the core RPC classes.
A minor suggestion for improvement:
Consider adding assertions to verify the return values of the
callmethod invocations. This would provide an additional layer of verification to ensure that the responses are correctly processed.Example:
$result = $conn1->call('Service.Process', ['Name' => 'foo', 'Value' => 18]); $this->assertEquals(expected_result, $result);src/RPC/MultiRPC.php (1)
Line range hint
153-193: Thread-safety concern with instance-based sequence managementReplacing the static sequence variable with an instance variable may introduce issues in concurrent environments. If multiple threads or coroutines share the same
MultiRPCinstance, the sequence number may not be thread-safe, leading to race conditions.Consider using a thread-safe mechanism for sequence incrementation, such as synchronization locks or atomic operations, or ensure that each thread uses its own
MultiRPCinstance.
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📒 Files selected for processing (5)
- examples/swoole.php (1 hunks)
- src/RPC/AbstractRPC.php (3 hunks)
- src/RPC/MultiRPC.php (3 hunks)
- src/RPC/RPC.php (2 hunks)
- tests/Goridge/RPC.php (2 hunks)
🧰 Additional context used
🔇 Additional comments (13)
examples/swoole.php (1)
1-13: LGTM: File structure and namespace declarations are well-organized.The file follows PHP best practices with strict type declarations and proper namespace imports. The structure is clean and easy to understand.
src/RPC/RPC.php (3)
18-18: LGTM: Improved parameter formatting.The constructor parameter formatting change for
$codecimproves consistency with other method signatures in the file. This change doesn't affect the functionality and enhances code readability.
Line range hint
46-53: LGTM: No changes needed for thecreatemethod.The
createmethod remains unchanged and is consistent with the new instance-based sequence management approach. It creates a new instance of the class, which will have its own$sequenceproperty, aligning with the recent changes.
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1-53: Summary: Improved sequence management addresses PR objectives.The changes in this file successfully transition from static to instance-based sequence management, addressing the PR objective of fixing sequence counting. This improvement enhances thread-safety and allows for better handling of concurrent RPC instances.
The modifications are consistent with similar changes in other RPC classes mentioned in the AI summary, indicating a systematic approach to resolving the issue across the codebase.
To ensure consistency across the codebase, let's verify that similar changes have been made in related files:
src/RPC/AbstractRPC.php (5)
22-22: LGTM: Clear deprecation notice added.The deprecation notice for
$seqis clear and provides guidance on using$this->sequenceinstead. This change aligns with the PR objective of fixing sequence counting.
26-29: LGTM: New$sequenceproperty added.The addition of the
$sequenceproperty as a protected integer initialized to 1 is appropriate. This change implements instance-based sequence management, addressing the issue mentioned in the PR objectives.
66-73: LGTM: Global namespace function calls used.The use of backslash-prefixed function calls (
\substr,\sprintf) ensures that the global namespace versions are used. This change improves code reliability by avoiding potential conflicts with user-defined functions.
85-89: LGTM: Instance-based sequence management implemented.The changes in the
packFramemethod are appropriate:
- The use of
\ucfirstis consistent with the global namespace function calls in other parts of the code.- The replacement of
self::$seqwith$this->sequencecorrectly implements instance-based sequence management.- The use of
\strlenis also consistent with the global namespace function calls.These changes align with the PR objective of fixing sequence counting.
Line range hint
22-89: Summary: Successful implementation of instance-based sequence management.The changes in this file successfully address the PR objective of fixing sequence counting:
- The static
$seqproperty is deprecated with a clear notice.- A new instance-based
$sequenceproperty is introduced.- All relevant method calls now use
$this->sequenceinstead ofself::$seq.- Global namespace function calls are consistently used throughout the file.
These changes improve the reliability and maintainability of the code while addressing the sequence counting issue. The implementation is clean and consistent.
tests/Goridge/RPC.php (2)
9-9: LGTM: New import added for Frame class.The addition of the Frame class import is necessary for the new test method and is correctly placed.
Line range hint
1-305: Summary: Excellent addition of sequence testing.The changes in this file effectively address the PR objective of fixing sequence counting. The new
testCallSequencemethod provides comprehensive coverage for the instance-based sequence management implemented in the core RPC classes. This test ensures that multiple RPC instances can maintain their own sequences correctly, which is crucial for the reliability of the RPC communication.The implementation is clean, well-structured, and aligns perfectly with the project's testing practices. Great job on improving the test coverage!
src/RPC/MultiRPC.php (2)
168-170: Ensure consistent sequence incrementationAfter assigning
$seq = $this->sequence;, you increment$this->sequence++. Verify that this sequencing logic is intentional and that$seqis meant to hold the value prior to incrementation. This ensures that sequence numbers are correctly managed and unique.
191-193: Confirm sequence handling in asynchronous callsIn the
callAsyncmethod,$seqis assigned from$this->sequencebefore incrementing$this->sequence++. Ensure that this pattern maintains the correct sequence numbers for asynchronous operations and doesn't introduce any off-by-one errors.
| go(function () use ($barrier) { | ||
| $rpc = new Goridge\RPC\RPC( | ||
| Goridge\Relay::create('tcp://127.0.0.1:6001') | ||
| ); | ||
| echo $rpc->call('App.Hi', 'Antony'); | ||
| }); |
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🛠️ Refactor suggestion
Consider optimizing RPC usage and improving configuration management.
-
Creating a new RPC instance for each coroutine might not be the most efficient approach. Consider reusing a single RPC instance across coroutines if possible.
-
The hardcoded IP and port (
tcp://127.0.0.1:6001) could be moved to a configuration variable for better maintainability and flexibility. -
The direct
echoof the RPC call result doesn't allow for proper error handling or output formatting. Consider wrapping this in a try-catch block and formatting the output.
Here's a suggested refactor:
$config = [
'rpc_address' => 'tcp://127.0.0.1:6001',
'num_coroutines' => 3,
];
$rpc = new Goridge\RPC\RPC(Goridge\Relay::create($config['rpc_address']));
for ($i = 0; $i < $config['num_coroutines']; $i++) {
go(function () use ($rpc, $barrier) {
try {
$result = $rpc->call('App.Hi', 'Antony');
echo "Coroutine " . Co::getCid() . " result: " . $result . PHP_EOL;
} catch (\Exception $e) {
echo "Coroutine " . Co::getCid() . " error: " . $e->getMessage() . PHP_EOL;
}
});
}This refactored version improves configuration management, reuses the RPC instance, and adds basic error handling and output formatting.
| if ($frame->options[0] !== $this->sequence) { | ||
| throw new RPCException('Invalid RPC frame, sequence mismatch'); | ||
| } | ||
|
|
||
| self::$seq++; | ||
| $this->sequence++; | ||
|
|
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Approve instance-based sequence management, but address inconsistency.
The changes from self::$seq to $this->sequence improve encapsulation and allow for better handling of concurrent RPC instances. This aligns with similar changes in other RPC classes.
However, there's an inconsistency:
The line self::$seq++; should be removed as it's no longer needed and inconsistent with the new instance-based approach.
Apply this diff to resolve the issue:
if ($frame->options[0] !== $this->sequence) {
throw new RPCException('Invalid RPC frame, sequence mismatch');
}
-self::$seq++;
$this->sequence++;📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| if ($frame->options[0] !== $this->sequence) { | |
| throw new RPCException('Invalid RPC frame, sequence mismatch'); | |
| } | |
| self::$seq++; | |
| $this->sequence++; | |
| if ($frame->options[0] !== $this->sequence) { | |
| throw new RPCException('Invalid RPC frame, sequence mismatch'); | |
| } | |
| $this->sequence++; |
| $frame = $this->getResponseFromRelay($relay, $this->sequence, true); | ||
|
|
||
| self::$seq++; | ||
| $this->sequence++; |
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Initialize $sequence property before usage
The $sequence property is used here but doesn't appear to be initialized in the class. This could lead to undefined behavior or errors due to null or unexpected initial values. Consider initializing $sequence in the constructor.
Apply this diff to initialize $sequence:
public function __construct(
array $relays,
int $asyncBufferThreshold = self::DEFAULT_BUFFER_THRESHOLD,
CodecInterface $codec = new JsonCodec()
) {
+ $this->sequence = 0;
// existing code...
}Committable suggestion was skipped due to low confidence.
See: #31