[GitHub] [qpid-broker-j] vavrtom commented on a change in pull request #36: QPID-8361: [Broker-J] Create a developer guide for Qpid Broker-J

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vavrtom commented on a change in pull request #36: QPID-8361: [Broker-J] Create a developer guide for Qpid Broker-J
URL: https://github.com/apache/qpid-broker-j/pull/36#discussion_r324095413
 
 

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 File path: doc/developer-guide/src/main/markdown/code-guide.md
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+# Qpid Broker-J Coding Standards
+
+This article documents the standard adopted for Java code in the Qpid project.
+All committers are expected to follow this standard.
+
+## Executive Summary
+
+The main things for layout purposes in the standard are:
+
+ * Indent using four spaces. No tabs.
+ * braces always go on new lines, e.g.
+```java
+if (x == 5)
+{
+    System.out.println("Hello");
+}
+```
+
+rather than
+
+```java
+if (x == 5} {
+    System.out.println("Hello");
+}
+```
+
+Always add braces, e.g.
+
+```java
+    if (x == 5)
+    {
+        System.out.println("Hello");
+    }
+```
+rather than
+
+```java
+if (x == 5}
+    System.out.println("Hello");
+```
+
+Fields prefixed with underscores, e.g. `_messageCount`
+
+Spaces after keywords but no spaces either before or after parentheses in method calls, e.g.
+
+```java
+    if (x == 5)
+```
+
+rather than
+
+```java
+    if(x==5)
+```
+
+but
+
+```java
+    foo.bar(4, 5)
+```
+
+rather than
+
+```java
+    foo.bar( 4, 5 )
+```
+
+## Details
+
+### Introduction
+
+This document describes two types of coding standard:
+
+1. **Mandatory** standards must be followed at all times.
+2. **Recommended** standards should in general be followed but in particular cases may be omitted
+   where the programmer feels that there is a good reason to do so.
+
+Code that does not adhere to mandatory standards will not pass the automated checks
+(or a code review if the guideline is not stylistic).
+
+### Source files
+
+This section defines the general rules associated with the contents of a Java source file and the order
+in which the each part should be presented. No rules on programming style, naming conventions or indentation are given here.
+
+1. Java source files must have a ".java" suffix (this will be enforced by the compiler) [mandatory].
+2. The basename of a Java source file must be the same as the public class defined therein
+   (this will be enforced by the compiler) [mandatory].
+3. Only one class should be defined per source file (except for inner classes and one-shot uses
+   where the non-public class cannot conceivably be used outside of its context) [mandatory].
+4. Source files should not exceed 1500 lines [recommended].
+5. No line in a source file should exceed 120 characters [mandatory].
+6. The sections of a source file should be presented in the following order [mandatory]:
+   * File information comment (see rule 7 below).
+   * Package name (see rules 1 to 3 in the section 2.1 above and rule 8 below).
 
 Review comment:
   Section 2.1 is probably missing

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