Code refactoring #95
Code refactoring #95
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WalkthroughModernized code across netty-socketio-core: replaced size() checks with isEmpty(), converted anonymous classes to lambdas, applied diamond operator, simplified hashCode/equals logic, adjusted one deserializer's throws clause, and made minor loop and logging tweaks. Changes
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes
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Actionable comments posted: 0
🧹 Nitpick comments (1)
netty-socketio-core/src/main/java/com/socketio4j/socketio/MultiRoomBroadcastOperations.java (1)
51-59: Consider extracting the null/empty check to reduce duplication.The pattern
if (this.broadcastOperations == null || this.broadcastOperations.isEmpty())is repeated in every method. You could extract this to a private helper method or handle null in the constructor by defaulting to an empty collection.🔎 Optional: Handle null in constructor
public MultiRoomBroadcastOperations(Collection<BroadcastOperations> broadcastOperations) { - this.broadcastOperations = broadcastOperations; + this.broadcastOperations = broadcastOperations != null ? broadcastOperations : Collections.emptyList(); }Then the null checks in each method become simply
if (this.broadcastOperations.isEmpty()).Also applies to: 69-77, 79-87, 97-105, 107-115, 117-125, 127-135
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📒 Files selected for processing (17)
netty-socketio-core/src/main/java/com/socketio4j/socketio/MultiRoomBroadcastOperations.java(8 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/SingleRoomBroadcastOperations.java(1 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/ack/AckSchedulerKey.java(1 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/annotation/OnDisconnectScanner.java(1 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/annotation/OnEventScanner.java(2 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/handler/AuthorizeHandler.java(1 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/handler/ClientHead.java(1 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/handler/EncoderHandler.java(3 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/handler/TransportState.java(1 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/namespace/Namespace.java(6 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/namespace/NamespacesHub.java(1 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/protocol/JacksonJsonSupport.java(7 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/protocol/PacketEncoder.java(1 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/scheduler/HashedWheelScheduler.java(2 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/scheduler/HashedWheelTimeoutScheduler.java(1 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/scheduler/SchedulerKey.java(2 hunks)netty-socketio-core/src/test/java/com/socketio4j/socketio/handler/EncoderHandlerTest.java(1 hunks)
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🔇 Additional comments (39)
netty-socketio-core/src/main/java/com/socketio4j/socketio/handler/ClientHead.java (2)
161-170: LGTM! Clean lambda conversion.The refactoring from anonymous Runnable to lambda expression is correct and improves readability. The captured variables are safe, and the control flow (including the recursive schedulePing() call) is preserved.
177-183: LGTM! Clean lambda conversion.The refactoring from anonymous Runnable to lambda expression is correct and improves readability. The captured variables are safe, and the disconnect logic is preserved.
netty-socketio-core/src/main/java/com/socketio4j/socketio/SingleRoomBroadcastOperations.java (1)
58-58: LGTM! Diamond operator modernization applied.The diamond operator simplifies the generic instantiation while maintaining type safety.
netty-socketio-core/src/main/java/com/socketio4j/socketio/protocol/PacketEncoder.java (1)
211-216: LGTM! More idiomatic loop construct.The do-while loop is clearer than the infinite for loop with a break condition, improving readability while preserving the exact same behavior.
netty-socketio-core/src/main/java/com/socketio4j/socketio/handler/AuthorizeHandler.java (1)
104-108: LGTM! Lambda modernization improves conciseness.The lambda expression is more readable than the anonymous Runnable, and the explicit timeout parameters enhance clarity.
netty-socketio-core/src/main/java/com/socketio4j/socketio/ack/AckSchedulerKey.java (1)
40-40: LGTM! Standard library method is clearer.Using
Long.hashCode(index)is more readable and maintainable than manual bit manipulation while providing identical hash behavior.netty-socketio-core/src/test/java/com/socketio4j/socketio/handler/EncoderHandlerTest.java (1)
278-278: LGTM! Idiomatic empty check.Using
isEmpty()is more expressive and potentially more efficient thansize() == 0.netty-socketio-core/src/main/java/com/socketio4j/socketio/handler/TransportState.java (1)
28-28: LGTM! Diamond operator modernization applied.The diamond operator reduces verbosity while maintaining type safety.
netty-socketio-core/src/main/java/com/socketio4j/socketio/scheduler/SchedulerKey.java (2)
37-37: LGTM! Simplified hashCode implementation.Removing the redundant
+ 0when fields are null makes the code cleaner without changing behavior.Also applies to: 42-42
63-63: LGTM! Simplified enum equality check.Since
Typeis an enum, using==for comparison is both correct and more efficient than the verbose null-checking pattern. This simplification improves readability significantly.netty-socketio-core/src/main/java/com/socketio4j/socketio/annotation/OnDisconnectScanner.java (1)
37-45: LGTM! Lambda modernization improves conciseness.The lambda expression is more readable than the anonymous inner class while preserving the exact same functionality and exception handling.
netty-socketio-core/src/main/java/com/socketio4j/socketio/scheduler/HashedWheelScheduler.java (3)
57-60: LGTM!Clean lambda conversion for the simple schedule method.
62-75: LGTM!The lambda refactoring preserves the original behavior: executing the runnable within the Netty event loop and cleaning up the scheduled future in the finally block.
77-90: LGTM!Lambda correctly preserves the cleanup semantics with the finally block.
netty-socketio-core/src/main/java/com/socketio4j/socketio/annotation/OnEventScanner.java (3)
44-46: LGTM!Using
isEmpty()is more idiomatic than checkingsize() == 0or comparing with an empty string.
88-107: LGTM!The lambda conversion is clean and preserves the original exception handling and argument population logic.
111-121: LGTM!Diamond operator usage is appropriate for Java 7+.
netty-socketio-core/src/main/java/com/socketio4j/socketio/handler/EncoderHandler.java (3)
225-229: Minor behavioral change in logging.The previous code likely provided a fallback like "N/A" when sessionId was null. Now
String.valueOf(null)will log the literal string "null". This is more accurate but worth noting as a subtle behavioral change.
402-405: LGTM!Diamond operator usage is appropriate.
449-452: LGTM!Removing the unnecessary
throws Exceptiondeclaration is cleaner since the method body doesn't throw checked exceptions.netty-socketio-core/src/main/java/com/socketio4j/socketio/MultiRoomBroadcastOperations.java (1)
40-49: LGTM!Using
isEmpty()is more idiomatic thansize() == 0.netty-socketio-core/src/main/java/com/socketio4j/socketio/scheduler/HashedWheelTimeoutScheduler.java (3)
66-69: LGTM!Clean lambda conversion.
71-79: Verify exception safety: cleanup before execution vs. after.The cleanup (
scheduledFutures.remove(key)) happens beforerunnable.run(). If the runnable throws an exception, the key is still correctly removed. However, note thatHashedWheelScheduler.scheduleCallbackuses atry-finallypattern with cleanup infinally. Ensure this difference is intentional.
81-89: LGTM!Consistent with the scheduleCallback pattern in this file.
netty-socketio-core/src/main/java/com/socketio4j/socketio/protocol/JacksonJsonSupport.java (7)
79-108: LGTM!Removing
JsonProcessingExceptionfrom the throws clause is correct since it's a subclass ofIOException.
123-138: LGTM!The hashCode simplification is mathematically equivalent—adding 0 has no effect on the result.
140-157: LGTM!The equals simplification is logically equivalent and more concise.
196-199: LGTM!Diamond operator usage is appropriate.
221-226: LGTM!Using
ThreadLocal.withInitial(ArrayList::new)is the modern, idiomatic approach for initializing ThreadLocal with a supplier.
275-277: LGTM!Diamond operator usage is consistent with the rest of the refactoring.
302-305: LGTM!Diamond operator for ThreadLocal field declarations is appropriate.
netty-socketio-core/src/main/java/com/socketio4j/socketio/namespace/NamespacesHub.java (1)
57-57: LGTM! Diamond operator usage is appropriate.The type inference context from the return type makes this refactoring safe and improves code readability.
netty-socketio-core/src/main/java/com/socketio4j/socketio/namespace/Namespace.java (7)
82-86: LGTM! Diamond operator brings consistency to field declarations.These changes align with the existing pattern used in lines 81 and 88, improving code uniformity across the listener queue declarations.
214-214: LGTM! Comment grammar improvement.Good catch improving the readability of the documentation.
335-335: LGTM! Valid hashCode simplification.Removing the addition of 0 is mathematically correct and improves code clarity without affecting functionality.
352-353: LGTM! Standard null-safe equals pattern.The simplified logic correctly handles null comparisons while maintaining the equals contract.
359-359: LGTM! Appropriate wildcard simplification.Replacing
Iterable<? extends Object>withIterable<?>is correct since all types extend Object, making the bound redundant.
375-375: LGTM! Consistent wildcard simplification.Same improvement as line 359, maintaining consistency across the overloaded
addListenersmethods.
471-471: LGTM! Diamond operator usage is appropriate.Type inference from the variable declaration context makes this refactoring safe and improves readability.
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🧹 Nitpick comments (1)
netty-socketio-core/src/main/java/com/socketio4j/socketio/transport/NamespaceClient.java (1)
181-185: LGTM! Consider optional further modernization.The refactoring correctly simplifies the equals logic and improves readability. The new direct-return pattern is clearer than the original multi-branch approach.
For additional modernization consistency with this PR's goals, consider using
Objects.equals():🔎 Optional: Modernize with Objects.equals() and Objects.hash()
For the equals method:
- if (getNamespace().getName() == null) { - return other.getNamespace().getName() == null; - } else { - return getNamespace().getName().equals(other.getNamespace().getName()); - } + return Objects.equals(getNamespace().getName(), other.getNamespace().getName());For the hashCode method (lines 151-165), you could similarly modernize:
@Override public int hashCode() { - final int prime = 31; - int result = 1; - if (getSessionId() == null) { - result = prime * result + 0; - } else { - result = prime * result + getSessionId().hashCode(); - } - if (getNamespace().getName() == null) { - result = prime * result + 0; - } else { - result = prime * result + getNamespace().getName().hashCode(); - } - return result; + return Objects.hash(getSessionId(), getNamespace().getName()); }Both
Objects.equals()andObjects.hash()handle null values safely and would align with the broader modernization effort described in this PR.
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📒 Files selected for processing (4)
netty-socketio-core/src/main/java/com/socketio4j/socketio/SocketIOServer.java(2 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/annotation/OnEventScanner.java(2 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/handler/AuthorizeHandler.java(2 hunks)netty-socketio-core/src/main/java/com/socketio4j/socketio/transport/NamespaceClient.java(1 hunks)
🚧 Files skipped from review as they are similar to previous changes (2)
- netty-socketio-core/src/main/java/com/socketio4j/socketio/annotation/OnEventScanner.java
- netty-socketio-core/src/main/java/com/socketio4j/socketio/handler/AuthorizeHandler.java
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netty-socketio-core/src/main/java/com/socketio4j/socketio/SocketIOServer.java
[error] 416-422: Compilation error: cannot find symbol. Method 'Objects.requireNonNullElseGet(io.netty.channel.IoHandlerFactory, NioIoHandlerFactory)' not found. This API requires a newer Java version than the target (the build uses Java 8 release).
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netty-socketio-core/src/main/java/com/socketio4j/socketio/SocketIOServer.java
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