Use non-blocking libraries and framework (webflux, kotlin coroutines), where needed. So reviews are slowed down by 15% in exchange of better quality of the code (including readability and maintainability, that will pay off later in terms of time). Performance Defects (PE) Readability in software means that the code is easy to understand. ... java checklist concurrency code-review thread-safety race-conditions java-concurrency 77 … This approach has delivered many quality issues into the hands of our clients, which has helped them assess their risk and apply appropriate mitigation. Code reviews are essential to code quality, but usually, no one in the team wants to review tens of thousands of lines of code. Security Code Review- Identifying Web Vulnerabilities 1.1.1 Abstract This paper gives an introduction of security code review inspections, and provides details about web application security vulnerabilities identification in the source code. 24 views. Java & Microservices interview refresher for experienced developers. The Code Review Checklist For each of the above categories, the following sections enlist the important review checklist items. Are the Java class libraries used where and when appropriate? In practice, a review of 200-400 LOC over 60 to 90 minutes should yield 70-90% defect discovery. The list contains best code review tools including open-source as well as commercial. So, as a general practice, always do a null check on a variable before any operation. To help wind up the development process on Java programs, you can download the Java code review checklist developed by Compulink Systems Pvt. Name of the variables, methods and classes should be intention revealing in nature. | Carvia Tech | of the repetitive code? The team should communicate with each other and agree on a code review checklist. Use Intention-Revealing Names. The main idea of this article is to give straightforward and crystal clear review points for code revi… These tips are independent of language and equally apply to Java, .NET or C++ code. 10 points checklist on Code Review Java Inspection Checklist, Page 3 13. Over a million developers have joined DZone. [ ] Is there any excess functionality in the code but not described in the specification? Code Review Checklist in Java: Code reviewing is a good practice and helps in improving the code quality and avoid unnecessary bugs resulting from poor coding practices. Ltd. This paper gives the details of the inspections to perform on the Java/J2EE source code. calculateGst(BigDecimal amount), BalanceLoader.java, etc. Photo by J. Kelly Brito on Unsplash. A SmartBear study of a Cisco Systems programming team revealed that developers should review no more than 200 to 400 lines of code (LOC) at a time. E.g. Code Review Checklist and Best practices in Java What to review while doing Code review Code Review and Unit testing are some of the best development practices I always recommend, strive for, and enforce as much as possible. Based on XKCD #1513, Code Quality, adapted and reproduced under CC BY-NC 2.5.. Don't Repeat Yourself (Avoid Duplication), Make sure the code formatting is applied, Use Exceptions rather than Return codes, Make class final if not being used for inheritance, Restrict privileges: Application to run with the least privilege mode required for functioning, Minimize the accessibility of classes and members, Input into a system should be checked for valid data size and range, Avoid excessive logs for unusual behavior, Release resources (Streams, Connections, etc) in all cases, Purge sensitive information from exceptions (exposing file path, internals of the system, configuration), Do not log highly sensitive information, Consider purging highly sensitive from memory after use, Avoid dynamic SQL, use prepared statement, Limit the accessibility of packages,classes, interfaces, methods, and fields, Limit the extensibility of classes and methods (by making it final), Validate inputs (for valid data, size, range, boundary conditions, etc), Validate output from untrusted objects as input, Define wrappers around native methods (not declare a native method public), Treat output from untrusted object as input, Make public static fields final (to avoid caller changing the value), Avoid exposing constructors of sensitive classes, Avoid serialization for security-sensitive classes, Guard sensitive data during serialization, Be careful caching results of potentially privileged operations, Beware the performance of string concatenation, Use checked exceptions for recoverable conditions and runtime exceptions for programming errors, Return empty arrays or collections, not nulls, In public classes, use accessor methods, not public fields, Adhere to generally accepted naming conventions, Always override hashCode when you override equals, Synchronize access to shared mutable data, Check static code analyzer report for the classes added/modified. Code review is really the only way to find obscure or confusing code, because other people are reading it and trying to understand it. Core Java - OOP Concepts, Garbage Collection, Multi-threading, Collections Framework, Java 8 Features, Lambda Functions, Streams. The Internet provides a wealth of material on code reviews: on the effect of code … The following code review checklist gives an idea about the various aspects you need to consider while reviewing the code: 1. Proper unit tests that covers the functional requirements. Personal Code Review. 30+ Java Code Review Checklist Items This Java code review checklist is not only useful during code reviews, but also to answer an important Java job interview question, Q. What is Double Checked Locking Problem in Multi-Threading? 14. Code Decisions code at right level of abstraction methods have appropriate number, types of parameters no unnecessary features redundancy minimized mutability minimized static preferred over nonstatic ... Code Review Checklist . It covers security, performance, and clean code practices. How will you increment each element of an Integer array, using parallel operation, What is left shift right shift and unsigned rght shift operator in Java, ebook PDF - Cracking Spring Microservices Interviews for Java Developers, ebook PDF - Cracking Java Interviews v3.5 by Munish Chandel. The purpose of this article is to propose an ideal and simple checklist that can be used for code review for most languages. Checklist Item. Here is a checklist of Java static code analysis tools, that we use at RomexSoft in most of our projects. It’salways fine to leave comments that help a developer learn something new. Code review checklist for Java developers, Submit Form with Java 11 HttpClient - Kotlin, Difference between HashMap, LinkedHashMap and TreeMap. Variable, Attribute, and Constant Declaration Defects (VC) ... Is there repetitive code that could be replaced by a call to a method that provides the behavior of the repetitive code? Checklist: Description/example: Use of descriptive and meaningful variable, method and class names as opposed to relying too much on comments. Code Review Checklist: Java Concurrency. Functions should be small! Category. Code formatting. Code Review Checklist Raw. Creating a code review checklist means you, and your whole team will have a codified reference point for your code quality, which will help streamline your code review process and ensure that the process is as refined as possible. Can we use non-blocking mechanism for inter service communication? Do not reinvent the wheels. Java Code Review Checklist 1. Meaningful naming convention, code should explain itself. How to handle service invocation failures. Existing libraries and methods should be reused wherever possible. Can use patterns to simplify concurrency? Apart from functional requirements, here is the code review checklist while reviewing any Java code: Code should be clean and follow design patterns wherever applicable, is there a potential for useful abstractions, Thread-safety and concurrency related guidelines. No duplication of code. Even though there are a lot of code review techniques available everywhere along with how to write good code and how to handle bias while reviewing, etc., they always miss the vital points while looking for the extras. Code consistency with the existing culture of writing the code. Classes and methods should be small in terms of number of lines. Just keepin mind that if your comment is purely educational, but not critical to meetingthe standards described in this document, prefix it with “Nit: “ or otherwiseindicate that it’s not mandatory for the author to resolv… A review of a non-trivial patch involving concurrency should take at least one hour (for some patches much, much more). When a experienced person is reviewing the code then there are a number of check points which should be … Classes should be small! Utilize this checklist to review the quality of your Java code, including security, performance, and static code analysis. Code Review Checklist - Java 1. Name of the variables, methods and classes should be intention revealing in nature. Meaningful Names. Bad: List list; Good: List users; Class and functions should be small and focus on doing one thing. Immutability/Snapshotting; Divide and conquer; Producer-consumer; Instance confinement; Thread/Task/Serial thread confinement; Active object; Code smells, identifying that a class or a subsystem could potentially be redesigned for better: All the item enlisted may or may not necessary for all java project. Are the Java class libraries used where and when appropriate? Versioing of endpoint! Opinions expressed by DZone contributors are their own. Java Code Review Checklist by Mahesh Chopker is a example of a very detailed language-specific code review checklist. Pick one word per concept. Author: Victoria Consistent method signatures (return optional instead of null for Java code) Synchronize access to shared mutable data. Personal code reviews are a highly effective practice that plays an important part in the Software Engineering Institute's Personal Software Process. Following is a curated list of top code analysis tools and code review tools for java with popular features and latest download links. The first approach was a “checklist review” which outlined specific things that a reviewer should check for at the class, method, and class-hierarchy levels. Do not log any sensitive information, neither put it into the query parameters. Meaningful Names. code_review_checklist.txt - General [ ] The code works [ ] The code is easy to understand ... Methods return early without compromising code readability - Java only [ ] Appropriate JCIP annotations are used [ ] No use of Object class, use generics instead Marketing Blog. can we write a java method that swaps two integers. Release resources after use (File Handles, db connections, etc), Avoid dynamic SQL, use prepared statements. Specification / Design [ ] Is the functionality described in the specification fully implemented by the code? Sharingknowledge is part of improving the code health of a system over time. Java Code Review Checklist juglviv Clean Code. Do not create adhoc threads, instead use shared Executors wherever possible. At the 22nd International Conference on Software Engineering, Alastair Dunsmore, Marc Roper, and Murray Wood presented the findings of their study on three different techniques for code review.. Developer Storage Usage Defects (SU) Are arrays large enough? Whether synchronous inter service communication can be avoided? Standard Code formatting across project. Java Code Review Checklist. Side effect on existing code, does this change break backward compatibility? Use Guava or Apache commons libraries wherever possible. Did I grasp the concepts in a reasonable amount of time by looking at the code? Checkstyle. There are plethora of Code Review Tools in the market and selecting one for your project could be a challenge. Follow their code on GitHub. Use checked exceptions for recoverable conditions and runtime exceptions for programming errors. Meaningful naming convention, code should explain itself. Concurrency is rationalized? Are object and array references set to null once the object or array is no longer needed? Proper error handling for negative scenarios, input should be validated before any processing. Design. In this case, understanding code means being able to easily see the code’s inputs and outputs, what each line of code is doing, and how it fits into the bigger picture. Code Review Checklist Static Code Analysis Checklist Item Category Notes Check static code analyzer report for the classes added/modified Static Code Analysis There must be automated Code Analysis for the project you are working on, do not forget to check the report for the modified/added classes. code-review-checklists has one repository available. We know NullPointerExceptionis the most common exception in Java and can cause big problems. Use Solution/Problem Domain Names. Using judicious comments, avoiding magic numbers, keeping one purpose for each variable, using good names, and using whitespace well can all improve the understandability of code. Using Pub/Sub or event driven approach instead of synchronous communication wherever possible. by October 16, 2020 | Functions. While going through the code, check the code formatting to improve readability and ensure that there are no blockers: a) Use … code-review-checklists has one repository available. It … Meaningful Names. As outlined in Tips for an Effective SAP Commerce Cloud Code Review, it's important to be able to deliver code reviews consistently across your team.This page provides a checklist of items to verify when doing code reviews. Code review can have an important function of teaching developers something newabout a language, a framework, or general software design principles. Follow their code on GitHub. Classes. The security code review checklist in combination with the secure code review process described above, culminates in how we at Software Secured approach the subject of secure code review. Java Inspection Checklist. The brain can only effectively process so much information at a time; beyond 400 LOC, the ability to find defects diminishes. Items in the list may be duplicated in more than one category because those are applicable in both. At the Apache Druid community, we are currently preparing a detailed checklist to be used during code reviews. A personal code review simply involves reading through the code and using the review checklist to look for errors. What do you understand by Java Memory Model? 2. Code consistency with the existing culture of writing the code, Consistent method signatures (return optional instead of null for Java code). Initialization and Declarations [ ] Are all local and global variables initialized before use? Java Inspection. Code becomes less readable as more of your working memory is r… This checklist can contain a set of rules including checking business … When reading through the code, it should be relatively easy for you to discern the role of specific functions, methods, or classes. I decided to publish parts of the checklist … Join the DZone community and get the full member experience. Let’s review each of them. Every team for every project should have such a checklist, agreed upon by all reviewers and maintained along the way. 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