When to use PUT or POST in a RESTful API and Web Service? Answer

Hello guys, if you are confused about whether to use PUT or POST for updating a resource using RESTful web service then you have come to the right place. In the past, I have shared the best RESTful web service books and courses and today, I am going to share some tips to choose between PUT and POST while designing your RESTful web services. Btw, you are not alone, one of the most common confusion among web developers is the choice of PUT or POST HTTP method for creating and updating a resource while developing RESTful Web Services. Since both can be used to submit data, you can use either POST or PUT to create or update a resource.

 

Review - Is IT Fundamentals for Cybersecurity Specialization on Coursera Worth it?

Learning the information technology (IT) fundamentals in general and cyber security is a good investment in yourself since there is a massive demand for these skills. Companies need people to secure their infrastructure, such as their servers where they host the website and user's data, monitor their network for unauthorized access, and scan the employee computers for any trojan and viruses that could give hackers control over your system.

What is Backend for front-end Pattern? How to use it?

  In the realm of microservices architecture, designing efficient communication between front-end applications and the back-end services is crucial. The Backend for Front-End (BFF) pattern has emerged as a useful architectural pattern to streamline this communication. In this article, we will delve into what the Backend for Front-End pattern is, its benefits, and how to effectively implement and utilize it in your microservices ecosystem.

What is Backend for front-end Pattern? How to use it?

The Backend for Front-End pattern, also known as BFF, is an architectural pattern that involves creating a specialized backend service for a specific front-end application or client. The purpose of this pattern is to decouple the front-end from the complexities and intricacies of the backend services, providing tailored APIs that align with the needs of the front-end.

By employing the BFF pattern, you create an intermediary layer that acts as a bridge between the front-end and the various backend services. This allows for improved flexibility, enhanced user experience, and optimized performance.

How to Use the Backend for Front-End Pattern

Identify the Front-End Application

Start by identifying the front-end application or client that will benefit from the BFF pattern. It can be a web application, mobile application, or any other consumer of the backend services.

Understand the Front-End Requirements

Work closely with the front-end development team to understand the specific requirements of the application. This includes the data and functionality needed, performance considerations, and any other factors that may impact the user experience.

Design the Backend for Front-End Service

Based on the front-end requirements, design a specialized backend service that acts as the BFF for the front-end application. This service will serve as an intermediary between the front-end and the backend services, encapsulating the necessary logic and communication.

Define Tailored APIs

The BFF service should expose a set of tailored APIs that are optimized for the front-end application's needs. These APIs should provide the required data in an efficient and convenient format, minimizing unnecessary round trips and reducing data transfer.

Aggregate Data and Handle Complexity

The BFF service should handle the complexity of interacting with multiple backend services. It can aggregate data from different services, orchestrate workflows, and transform or filter the data to meet the front-end's specific requirements. This helps in reducing the complexity and network overhead on the front-end side.

Optimize Performance

One of the key benefits of the BFF pattern is the ability to optimize performance. The BFF service can leverage caching mechanisms, pre-fetching of data, or implementing tailored data retrieval strategies to enhance response times and improve the overall user experience.

Maintain Separation of Concerns

While the BFF service acts as an intermediary between the front-end and the backend services, it's important to maintain separation of concerns. The BFF should not contain business logic or data manipulation that belongs to the backend services. Instead, it should focus on providing the necessary data and functionality required by the front-end.

Handle Security and Authorization

Ensure that the BFF service implements proper security measures to protect sensitive data and enforce appropriate authorization rules. This may involve authentication mechanisms, token-based access control, or integration with a central authentication service.

Evolve and Scale

As the front-end application evolves, the BFF service should also adapt accordingly. Monitor the usage patterns, performance metrics, and user feedback to continuously enhance and optimize the BFF service. Additionally, ensure that the BFF service is designed to be scalable and can handle increased traffic and load as the application grows.

Benefits of the Backend for Front-End Pattern

Improved Front-End Development Experience: The BFF pattern allows front-end developers to work with a specialized backend service that caters specifically to their needs. This results in a more streamlined development process, as the front-end team can focus on building the user interface without being hindered by backend complexities.

Enhanced Performance: By tailoring APIs and optimizing data retrieval and caching strategies, the BFF service can significantly improve the performance of the front-end application. This reduces latency, minimizes unnecessary data transfer, and provides a more responsive user experience.

Flexibility and Adaptability: The BFF pattern promotes flexibility by enabling the front-end application to evolve independently from the backend services. As requirements change or new features are introduced, the BFF service can be updated accordingly without impacting the existing backend services.

Simplified Backend Integration: The BFF service acts as a single point of integration for the front-end application, abstracting away the complexities of multiple backend services. This simplifies the integration process and reduces the coordination efforts required between the front-end and backend teams.

Security and Authorization Control: The BFF service can handle security concerns and enforce authorization rules specific to the front-end application. This allows for a centralized approach to security, ensuring that the appropriate authentication and authorization mechanisms are applied consistently.

Considerations for Using the Backend for Front-End Pattern

Increased Complexity: Implementing the BFF pattern introduces an additional layer of complexity to the overall architecture. It requires careful design and coordination between the front-end and backend teams to ensure smooth communication and maintain separation of concerns.

Potential Performance Bottlenecks: While the BFF pattern can improve performance, improper implementation or inadequate scalability measures can introduce performance bottlenecks. It is important to monitor and optimize the BFF service to ensure it can handle the expected load and traffic.

Maintenance and Versioning: As the front-end application evolves, the BFF service may require updates and maintenance. It is crucial to manage versioning and compatibility between the front-end and BFF service to prevent disruptions and ensure seamless upgrades.

Overlapping Functionality: Care must be taken to avoid duplicating functionality between the BFF service and backend services. It is essential to clearly define the responsibilities and boundaries of each component to avoid unnecessary redundancy or inconsistency.

Conclusion

The Backend for Front-End pattern provides a powerful approach to improving the interaction between front-end applications and backend services in a microservices architecture. By creating a specialized backend service tailored to the needs of the front-end, the BFF pattern enhances performance, simplifies integration, and promotes flexibility.

When implementing the BFF pattern, it is important to consider the specific requirements of the front-end application, design tailored APIs, optimize performance, and handle security and authorization effectively. By maintaining separation of concerns and continuously monitoring and optimizing the BFF service, you can create a robust and scalable architecture that enhances the development experience and delivers a seamless user experience.

Utilize the Backend for Front-End pattern as a valuable tool in your microservices ecosystem to bridge the gap between front-end applications and backend services, providing a streamlined and optimized communication channel.

Review - Is IBM Data Analytics with Excel and R Professional Certificate Worth it?

Companies are always collecting data about their customer’s behavior on their platform or maybe their products review and many other standards to make better decisions to improve their services and the user experience. Still, this data needs someone who can leverage the power of the data to make decisions, which is the role of data analysts. This career is one of the hottest in this century. Analyzing the data to get insight and better understand your users and customer will help you make your business successful or maybe have a good position in a company. 

Review - Is Data Science Fundamentals with Python and SQL Specialization on Coursera Worth It?

The demand for people who can analyze big data and extract meaningful information to drive decisions for companies is increasing every day. They need them to improve the quality of their services and deliver the best user experience for their customers. These actions are the responsibility and the role of the data scientists. Data scientists need to know many skills to perform the data analysis and make decisions such as the skills to collect data from different sources like the web and also extract and filter the data from the databases and clean them before performing analysis and even learn machine learning and deep learning to perform much more complex actions and make predictions but not all the data scientists know the artificial intelligence and not a mandatory skills. Still, it will be good if you have that in your belt.

How to Print Prime Numbers from 1 to 100 in Java [Solved]

Hello guys, today, I'll share with you a simple problem of writing a Java program to print prime numbers up to a given number like saying prime numbers from 1 to 100. It's one of the most common coding exercises for programmers learning in Java, as it gives you an opportunity to learn more about the essential operators in Java Programming. The key here is that you cannot use a library function which can simplify your job, you need to devise the algorithm for checking prime number by yourself. One of the most popular algorithms for generating prime is Sieve of Eratosthenes,  which we have discussed earlier, but in this post, we will take a simpler approach.

How to count a number of words in given String in Java? [Solved]

Can you write a method in Java that accepts a String argument and returns a number of words in it? A word is a sequence of one or more non-space characters i.e. any character other than '' (empty String). This should be your method signature:

public int count(String word);

This method should return 1 if the input is "Java" and return 3 if the input is "Java, C++, Python". Similarly a call to wordCount("    ") should return 0. 

3 ways to Find Duplicate Elements in a given Array in Java [Solved]

Hello guys, if you are wondering how to find duplicates from a given array in Java then you have come to the right place. This is one of the most popular coding problems from interviews and there are multiple ways to solve this problem. In this article, I will show you three ways to solve this problem. First, you will learn how to solve the problem using brute force way and then you will see how you can optimize and simplify the solution by using additional memory and using an appropriate data structure like a HashSet or Hash table. In the real interview, you may need to solve this problem in some constraints like you cannot use additional memory or additional data structure that's where knowing multiple ways to find duplicate in Java array really help.

How to Perform Union of Two Linked Lists Using Priority Queue in Java? Example Tutorial

Firstly, The Linked list shall be introduced, then how priority queue in java is been used, Then after that, we shall carry on on the main task.  What is LinkedList? A linked list is a data structure in which each node(element) holds the reference to the next node. You don’t need to go through the struggle of searching the exact node in the link list, all you have to do is go through the previous node because it holds the reference to the next node, then you can easily access it.

3 ways to Count words in Java String - Google Interview Questions with Solution

Today, I am going to share with you Java interview questions from Google, which were asked to one of my readers during the telephonic round. How do you count the number of words in a given String in Java? You can count words in Java String by using the split() method of String. A word is nothing but a non-space character in String, which is separated by one or multiple spaces. By using a regular expression to find spaces and split on them will give you an array of all words in a given String. This was the easy way to solve this problem as shown here, but if you have been asked to write a program to count a number of words in a given String in Java without using any of String utility methods like String.split() or StringTokenizer then it's a little bit challenging for a beginner programmer.

Review - Is Google Data Analytics Professional Certificate Really Worth it in 2024?

Hello friends, if you want to become a Data Analyst in 2024 and looking for best online courses, guides, and tutorials to learn Data Analysis then you have come to the right place. In the past, I have shared best Data Analysis courses, Books, and 2024 Data Analyst RoadMap, and in this article, I will share one of the most popular Coursera course to learn Data Analytic, Google Data Analytics Professional Certificate. With more than 800,000 enrollments on Coursera this is one of the most popular Data Analytics course on Coursera and why not? Its created from Google itself. It's also well structured, up-to-date and you will learn all essential Data Analytics skills from Google experts. 

3 ways to check if a String contains SubString in Java? IndexOf, contains, and lastIndexOf Example

You have given a String and a subString or a character and you need to find out whether given String contains the given character or substring, how would you do that? Well, there are three main ways to search String in Java, the contains() method, the indexOf() method and the lastIndexOf() method, all from java.lang.String class. First method, contains() accepts a CharSequence, superclass of String and return true if that CharSequence appear on the String you have called. The indexOf() and lastIndexOf() are similar method and both return the index (zero based) from where the given subString or character appear in the String you have called. Only difference between indexOf() and lastIndexOf() is that if given substring appear multiple time then they will return difference index, otherwise both will return the same index. Similarly if given sub-string is not present in the String, both will return -1 and contains() will return false.

How to make Immutable class in Java? Mutable vs Immutable Objects

How I make immutable objects in Java? I've always thought that all objects are immutable, because if you change the content of an String example, it will always create you an new String object and point to that. However later I found that String is a special class and its specially designed as an Immutable class because its often cached. Obviously you cannot cache anything which is not constant and that make sense why String is Immutable in Java. But this encouraged me to learn more about Mutable and Immutable class in Java and how to create a custom Immutable class in Java.

Difference between StringTokenizer and Split method in Java? Example

There are multiple ways to split a String in Java, but two of the most common ways are by using StringTokenizer and the split method of String class. You can use either one of them, but when to use which one? This short article will give you some details about StringTokenizer and Split method in Java to decide which one to use.

1) The StringTokenizer is legacy, Prefer split() as more chances of its performance getting improved as happens in Java 7.

2) The StringTokenizer doesn't support regular expression, while spilt() does. However, you need to be careful, because every time you call split, it creates a new Pattern object and compiles expression into a pattern. This means if you are using the same pattern with different input, then consider using Pattern.split() method, because compiling a pattern takes more time later to check whether a given string matches a pattern or not.

5 ways to Compare String Objects in Java - Example Tutorial

here are many ways to compare String in Java e.g. you can use equals() and equalsIgnoreCase() for equality check and compare() and compareTo() for ordering comparison. You can even use the equality operator == to perform reference-based comparison e.g. to check both the String reference variable points to the same object. In general, equals() is used to check whether the value of a given String is the same i.e. they contain the same characters in the same sequence or not e.g. "Groovy".equals("Groovy") will be true if you compare them using equals() method. You can also use equalsIgnoreCase() to check if they are equal irrespective of case e.g. "Apple" and "apple" will be the same if you compare them using equalsIgnoreCase() method.

4 ways to read String from File in Java - Example

Just like there are many ways for writing String to text file, there are multiple ways to read String form File in Java. You can use FileReader, BufferedReader, Scanner, and FileInputStream to read text from file. One thing to keep in mind is character encoding. You must use correct character encoding to read text file in Java, failing to do so will result in logically incorrect value, where you don't see any exception but content you have read is completely different than file's original content. Many of the method which is used to read String by default uses platform's default character encoding but they do have overloaded version which accepts character encoding. 

How to download a file using HTTP in Java? Example

Hello guys, if you are looking for tutorial to understand about how to download a  file using http in Java to have deep knowledge of java basics then you will definitely learn from this article. uploading and downloading files are common task but many Java developer are not aware about how to complete that. They don't know about HTTP and how to send and receive data using HTTP. Many of them also doesn't know about HttpClient which was added in JDK 11 as well as third party libraries like Apache HttpClient which you can use before JDK 11. Anyway, don't worry, we are again here with new article that is on download file using http will give all basics about the topic to our viewers or readers.  Let's start with an example first.

How to read CSV file in Java without using a third-party library? FileReader Example Tutorial

Hello guys, as you learn Java, one thing that comes up early and often is reading from/ writing to files, and doing something useful with that data. This is also one thing which you will keep doing and also forgetting very soon, if you are not then you have good memory as I always forget it and then I do google search to find my own articles. If you read this blog then you know that in the past, I have shared how to load CSV file using OpenCSV library as well how to load a CSV file with header using Jackson but a lot of you asked me how to do this without using any third party library like Jackson or OpenCSV. So, I thought to write about this article and I actually written but forgot to publish it for a long time. But I today I found it and publishing it now, it still works well. 

How to write to a File with try-with-resource in Java? Example Tutorial

Hello Java programmers and all people learning Java, if you are familiar with try-wit-resource statement then you know that its a great language functionality and tool to open files, sockets, streams, and network connections or any resource which are require closing. Before try-with-resource was introduce in Java 7, Java developers have to manually write try catch finally block to close the connections for both success and failure cases to prevent resource leak but it was also tricky and many programmer make mistakes which actually resulted in resource leaks. One common example of that is running out of file descriptors which is used for both opening file and socket in Java.  

How to recursive copy directory in Java with sub-directories and files? Example

Hello guys, it's a common requirement in Java to copy a whole directory with sub-directories and files but it's not that straightforward, especially not until Java 7. JDK 7 introduced some new file utility methods as part of Java NIO 2 which we will use in this article to show you how to recursively copy a whole directory with sub-directories and files in Java. I'll also show you how you can use Apache Commons if you are not running on Java 7 or higher versions. Basically, You can copy a file or directory by using the copy(Path, Path, CopyOption...) method. The copy fails if the target file exists unless the REPLACE_EXISTING option is specified.

How to check if a File exists in Java with Example

Hello guys,  if you are working in Java for a couple of years, then you have come across a scenario where you need to check if a file exists or not. This is often required while writing defensive code that writes or reads from a file. While there is a method to check if a file exists in Java or not, it's not straightforward to use because it returns true if a given path represents a file or a directory. Yes, I am talking about the File. Exists () method of the java.io package. This method is the key method to solve this problem, but you need to keep in mind that it returns true if a given path exists and it's either file or directory. 

How to append text to file in Java? Example Tutorial

Hello guys, In this article, I'll teach you how to append text to a file in Java. Earlier, I have taught you guys how to create a file and write text into it, but, append is totally different than creating a new file and writing data into it. In the case of append, the file already exists and you just add text at the end of the file. One popular example of appending text into a file is a log file that is constantly updated because your application continuously appends log details into it. While you don't need to create a logging framework here, just knowing how to append text into an existing file in Java is useful for Java programmers of all kinds of experience.

How to work with Files and Directories in Java? Example Tutorial

The File API is one of the important parts of any programming language or API and even though Java's file API both new and old, is powerful, they are not intuitive enough compared to other languages like Python. Apart from knowing the essential classes and abstractions e.g. File, InputStream, OutputStream, Reader, Writer, Channel, etc, you also need to know and remember some nitty-gritty detail to avoid subtle issues. There are many articles out there on the internet which can teach you how to read and write data from the file but there are very few which will tell you to do it in the right way.