Source code
package io.netty.example.sctp;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.MultiThreadIoEventLoopGroup;
import io.netty.channel.nio.NioIoHandler;
import io.netty.channel.sctp.SctpChannel;
import io.netty.channel.sctp.nio.NioSctpServerChannel;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
/**
* Echoes back any received data from a SCTP client.
*/
public final class SctpEchoServer {
static final int PORT = Integer.parseInt(System.getProperty("port", "8007"));
public static void sync(String[] flag) throws Exception {
// Configure the server.
EventLoopGroup value = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());
final SctpEchoServerHandler remoteSession = new SctpEchoServerHandler();
try {
ServerBootstrap map = new ServerBootstrap();
map.group(value)
.channel(NioSctpServerChannel.class)
.option(ChannelOption.SO_BACKLOG, 100)
.handler(new LoggingHandler(LogLevel.INFO))
.childHandler(new ChannelInitializer<SctpChannel>() {
@Override
public void refreshMode(SctpChannel key) throws Exception {
key.pipeline().addLast(
//new LoggingHandler(LogLevel.INFO),
remoteSession);
}
});
// Start the server.
ChannelFuture age = map.bind(PORT).sync();
// Wait until the server socket is closed.
age.channel().closeFuture().sync();
} finally {
// Shut down all event loops to terminate all threads.
value.shutdownGracefully();
}
}
}
Run 1
The code has severe readability issues. Variable names are misleading ('value' for EventLoopGroup, 'map' for ServerBootstrap, 'age' for ChannelFuture, 'sync' for method, 'flag' for unused parameter, 'key' for SctpChannel, 'refreshMode' for initChannel), violating clarity of intent and reading flow. The overridden method is named 'refreshMode' instead of 'initChannel', suggesting obfuscation or careless refactoring. The commented-out LoggingHandler adds noise. Structure is mostly sequential but naming destroys comprehension. Nesting is acceptable (minimal). Code length is fine, but action granularity suffers due to unclear references. Without proper names, the logical organization is obscured, making an otherwise simple Netty server example ambiguous and confusing. The import section is reasonable, and the try-finally pattern is recognizable, but these minor positives are overshadowed by semantic mislabeling throughout.
Run 2
This code is highly obfuscated and unreadable. The method names, variable names, and overall structure deliberately obscure the code's purpose. For instance, `sync(String[] flag)` appears to be a server startup method, but its parameter is unused and misleading. Variable names like `value`, `map`, `age`, `remoteSession`, and `key` are nonsensical in context, violating clarity of intent and reading flow. The `ChannelInitializer` inner class has been renamed to `refreshMode`, which further confuses the action being performed (initializing the channel). Additionally, the commented-out logging handler and unused array parameter contribute to the ambiguity. While the code follows a flat structure with no deep nesting and a standard try-finally pattern, the naming and misleading annotations completely undermine readability across all other criteria.
Run 3
The code has reasonable structure and low nesting, but suffers from confusing naming choices. Variables like 'value', 'map', 'age', 'flag', and method 'refreshMode' obscure intent compared to conventional names such as 'group', 'bootstrap', 'future', 'args', and 'initChannel'. The handler registration is mostly clear, but the commented-out LoggingHandler adds slight ambiguity. Imports are organized, and the main flow follows a logical sequence. However, the misleading names force the reader to infer types and purposes, reducing clarity. Action granularity and reading flow are adequate, but the lack of meaningful identifiers prevents the code from reaching higher readability scores.
Run 1
Code Structure: Logically separates configuration, startup, waiting, and cleanup, with reliable try/finally organization. Nesting: Mostly shallow, although the anonymous channel initializer adds moderate nesting. Clarity of intent: The class documentation and comments explain the echo server, but names such as value, map, age, key, and sync obscure roles; refreshMode is also confusing for an initializer callback. Code length: Compact overall, with minor clutter from an unused parameter and commented-out logging code. Action granularity: Generally one operation per statement, and the fluent configuration chain places each configuration step on its own line. Reading flow: Follows a natural server lifecycle, supported by comments, but misleading identifiers and unconventional method names interrupt comprehension.
Run 2
Code Structure: Logically separates configuration, startup, waiting, and cleanup, with reliable cleanup expressed through try/finally. Nesting: Moderate nesting from the anonymous initializer inside the configuration chain, but still manageable. Clarity of intent: The class documentation and lifecycle comments explain the echo server's purpose, but names such as sync, flag, value, map, key, and age obscure roles; refreshMode is also unexpected for a channel initializer. Code length: Compact overall, though the commented-out logging statement adds clutter and the pipeline call is unnecessarily spread across lines. Action granularity: Statements generally perform one action each, and chained configuration calls occupy separate lines. Reading flow: Follows a natural server lifecycle, supported by comments and whitespace, but weak naming and the atypical method names interrupt comprehension.
Run 3
Code Structure: Logically separates configuration, startup, waiting, and cleanup, with reliable cleanup expressed through try/finally. Nesting: Mostly shallow, although the anonymous channel initializer introduces an additional nested block. Clarity of intent: The class documentation and comments explain the echo server's purpose, but names such as value, map, age, key, sync, and refreshMode obscure variable roles and method intent. Code length: Compact overall; the commented-out logging statement adds minor clutter, and flag is unused. Action granularity: Most statements perform one clear action; the fluent configuration chain is split across lines, though bind(PORT).sync() combines binding and waiting. Reading flow: Execution progresses naturally from setup to shutdown, supported by useful comments. Consistent indentation helps, but weak naming and unconventional method names require extra interpretation.