Source code
package io.netty.example.sctp;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
/**
* Handler implementation for the SCTP echo server.
*/
@Sharable
public class SctpEchoServerHandler extends ChannelInboundHandlerAdapter {
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
ctx.write(msg);
}
@Override
public void channelReadComplete(ChannelHandlerContext ctx) {
ctx.flush();
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
// Close the connection when an exception is raised.
cause.printStackTrace();
ctx.close();
}
}
Run 1
The code is highly readable. It has a clear, logical structure with imports, class declaration, and concise method overrides. Nesting is minimal, with no nested blocks or conditionals. Each method expresses a single intent: reading data, flushing, and handling exceptions. Code length is appropriate for an echo handler — no unnecessary boilerplate. Action granularity is well-maintained, with one action per line (e.g., `ctx.write(msg)` and `cause.printStackTrace()`). Reading flow is natural: the class is named clearly, methods are ordered logically, and the Javadoc comment explains the class purpose. Minor deduction for the inline comment in `exceptionCaught` being slightly redundant, but overall the code is nearly exemplary.
Run 2
The code is highly readable due to its simple, logical structure. It follows a standard handler pattern with clear method overrides. Nesting is minimal, and each method performs a single, well-defined action, enhancing clarity of intent. The reading flow is natural, with methods ordered in a typical lifecycle sequence. However, the score is slightly reduced by the use of printStackTrace() in the exception handler, which is generally discouraged for production code and could be replaced with proper logging. Overall, the code is concise, flat, and easy to understand.
Run 3
This code is highly readable. It has a clear, logical structure with one class and three overridden methods, each performing a distinct function. Nesting is minimal—only a single class level. Intent is explicit: an SCTP echo server handler that writes messages back, flushes, and closes on exceptions. Code length is concise and appropriate for its purpose. Each method body contains one or two actions per line, maintaining good action granularity. Reading flow is natural: channelRead writes, channelReadComplete flushes, and exceptionCaught handles errors. Naming follows Java conventions, and the comments clarify non-obvious parts like exception handling. Minor deductions: the imported package order is slightly unconventional (first import after package line), but this is negligible. Overall, it is well-structured, flat, and easy to understand.
Run 1
Code Structure: Clearly organized into three focused event-handler methods. Nesting: Flat, with no conditional blocks or nested control flow. Clarity of intent: The class name, documentation, and overridden method names clearly convey an SCTP echo handler; understanding the separate write and flush operations requires basic Netty knowledge. Code length: Concise, with no unnecessary logic or repetition. Action granularity: Each statement performs one action, making execution easy to follow. Reading flow: Methods progress naturally from receiving data to completing reads and handling exceptions. A blank line between the package declaration and imports would slightly improve formatting.
Run 2
Code Structure: The class is logically organized into three focused event-handler methods. Nesting: There is no nested control flow, making the code easy to scan. Clarity of intent: The class name, documentation, and straightforward write, flush, and close calls clearly express an SCTP echo handler; understanding callback timing requires some Netty familiarity. Code length: The implementation is concise without unnecessary logic. Action granularity: Each statement performs one action on its own line. Reading flow: Methods follow a natural progression from receiving data to completing reads and handling errors. A blank line between the package declaration and imports would slightly improve visual separation.
Run 3
Code Structure: Clearly organized into three focused event-handler methods. Nesting: Flat control flow with no nested logic. Clarity of intent: The class name, documentation, and straightforward operations clearly communicate an SCTP echo handler; the write/flush separation assumes some familiarity with Netty. Code length: Concise, with no unnecessary implementation. Action granularity: Each statement performs a single action on its own line. Reading flow: Methods follow a natural sequence from receiving data to completing reads and handling exceptions. A blank line between the package declaration and imports would slightly improve visual organization.