Introduction

In today’s distributed computing environment, systems often need to communicate across networks efficiently. Remote Procedure Call (RPC) frameworks provide a mechanism for one system to execute functions or methods on another, abstracting the complexities of network communication, serialization, and data exchange. This guide explores RPC frameworks, their benefits, and the most popular options available.

What is an RPC Framework?

An RPC framework allows applications to invoke functions on remote systems as if they were local, enabling seamless communication between different services or microservices. These frameworks handle:

• Network communication (request and response handling)
• Serialization (data encoding/decoding)
• Error handling (timeouts, retries, exceptions)
• Security (authentication, encryption, and authorization)

Benefits of Using RPC Frameworks

• Simplifies communication between distributed systems
• Enhances performance with efficient serialization and transport mechanisms
• Supports multiple languages, making it ideal for heterogeneous environments
• Reduces development complexity by abstracting network operations

Popular RPC Frameworks

1. gRPC (Google RPC)

• Developed by Google, based on Protocol Buffers (protobufs)
• Uses HTTP/2, enabling efficient communication
• Supports bi-directional streaming and authentication
• Ideal for microservices and high-performance applications

2. Apache Thrift

• Created by Facebook to enable cross-language service communication
• Supports multiple serialization formats and transport protocols
• Uses an IDL (Interface Definition Language) for defining services
• Good for polyglot environments where multiple languages interact

3. JSON-RPC

• A lightweight RPC protocol using JSON for message exchange
• Enables batch processing (multiple requests in a single call)
• Commonly used in web applications and blockchain (Ethereum API)

4. XML-RPC

• Uses XML for message encoding
• Simpler than SOAP but less efficient than gRPC or JSON-RPC
• Often used in legacy systems and CMS applications (e.g., WordPress)

5. D-Bus

• Used for Inter-Process Communication (IPC) in Linux-based environments
• Enables communication between system components like GNOME and KDE

6. RPyC (Remote Python Call)

• A Python-specific RPC framework
• Allows remote object sharing and method execution
• Useful for Python-based distributed applications

7. SOAP (Simple Object Access Protocol)

• XML-based enterprise-level RPC framework
• Provides built-in security and standardization
• Commonly used in banking, finance, and legacy enterprise systems

Comparing RPC Frameworks

Choosing the Right RPC Framework

• If you need high-performance microservices, use gRPC.
• For multi-language service communication, consider Apache Thrift.
• If your app requires lightweight JSON-based RPC, go with JSON-RPC.
• D-Bus is best for Linux IPC.
• If you are developing enterprise solutions, SOAP is a reliable choice.

Conclusion

RPC frameworks are essential for modern distributed applications, enabling efficient and scalable communication. Choosing the right framework depends on your use case, language support, and performance needs. Whether you’re working on microservices, web applications, or enterprise systems, there’s an RPC framework suited for your requirements.

The post Understanding RPC Frameworks: A Guide to Remote Procedure Calls appeared first on Artificial Intelligence.

Microservice is a hot topic these days. But why does everyone talk about microservice? What is a monolithic architecture and what is microservices architecture? I will explain that by going through the migration process from a monolithic architecture to a microservice architecture. I will also introduce the characteristics, advantages of microservices architecture, and some of its challenges.

What is Monolithic Architecture?

Monolithic architecture means that we put all the functions of an application into a single archive package to deploy and run. For example, if you use Java, all your functions are packaged into a Jar package or a War package. This style of architecture can be called a single application style architecture, also known as a monolithic architecture.

Advantages of Monolithic Architecture

What are the advantages of this architecture? It has many advantages, including relatively simple and familiar to everyone. Also, it is IDE-friendly. IDEs are typically designed to develop, deploy, debug, profile a single application easily. It is very easy to deploy, for example, since there is only a single war package or jar package, or an executable program, you can easily deploy it in one directory or multiple directories.

Disadvantages of Monolithic architecture

Of course, this monolithic architecture also has its shortcomings. The shortcomings mainly lie in the complexity of the system, especially in complex systems such as online shopping malls and e-bankings. These single application code base will be huge and difficult to maintain, it is also difficult to understand.

Besides, because the code base is extremely large, it takes a lot of time to start up. When we used to make a single application, it would take half an hour to start, so we all have enough time to go to play table tennis.

It lacks scalability. Since all the functions are placed in the same application, and if I want to change a tiny function, for example, I modify the user registration function a little bit, but the logistics module has not changed, even the logistics module has not changed, I have to be able to redeploy it again, it’s painful and inefficient.

There are many other disadvantages because it is a single code base, so we can only use one technology stack, all Java, all C++, all Python, etc., which will have many restrictions. These are the shortcoming of monolithic architecture.

How to Solve the Deficiencies of Monolithic Architecture?
Now that there are these deficiencies, how can we solve them? The methodology of the solution in the software world is the same as in the usual world. When we face complicated problems in our lives, our method is to Divide and Conquer, which is the same as this software world. The monolithic architecture is simply all in one, that is, putting everything together. If I want to solve the problems that are just sort of, I have to go through some divisions.

First of all, the vertical division will divide out completely irrelevant applications. For example, a user registration module and a picture display module are completely non-interfering. We can divide it into multiple separate modules, make them less coupling.

When the system slowly becomes more and more complicated, and a single module may be more complicated, we may consider dividing and conquering again, that is, horizontal division. What is horizontal division? For example, the logistics module may need to access user information, the credit module may also need to access user information, and so on. If all modules access the same user database, the database loading will be extremely high. Therefore, we divide them horizontally, we put all the user-related ones into a lower-level user management module and the order-related ones into an order management module. This is the second step to solve single architecture defects. If the modules are still very complicated even after these two steps of division, we will introduce the microservices model to the system.

The Microservice Model

The microservice model does not have a strict definition at present, but it can be roughly divided into the following characteristics. The entire system is divided according to the business scenario, for example, the user management module just mentioned may include user registration, user login, etc. We divide it according to the business scenario so that its scalability can be better. At the same time, the services communicate through several language-agnostic mechanisms, including the RESTful style of HTTP, which is the commonly used one.

Also, each service is autonomous. To put it simply, my data belongs to me. Just as an example, the user data is managed by the user management module. To let the user data be accessed by others, you require others to fetch the data through your user management module, rather than direct access to your database.

There is another feature, because after it is divided into more and more small services, in the end, its deployment may be difficult, so the microservice model requires a feature of automated deployment.

Of course, when you develop more and more microservices, you may need to consider a method to manage them. For example, a city had only one enterprise before, you can contact it easily. But when thousands or hundreds of enterprises have developed in the future, you can’t find them and deal with them one by one. Maybe there will be a bureau of industry and commerce. When I’m looking for this service, I first look for the public bureau, look for that company providing this particular service and I will find the contact address. Then I will find another company to communicate with him. This is a characteristic of centralized management.

Next, the distribution of microservices across different machines is certainly natural, multiple services, multiple machines, multiple instances are deployed to form a distributed system. Based on these characteristics, Microservice has advantages, which are exactly what the monolithic architecture lacks.

Another advantage includes a better understanding of the code. In the past, all the code was put together, and everyone may not understand it, which is very complicated. But a service module may only have one simple function such as user registration, user login, credit query and so on. Such a simple function module, the code is simple and easy to maintain, and the development efficiency is high. It also has good expansion capabilities. For example, I want to add an email notification during the registration process. Yes, there is no need to edit the user registration code.

The choice of the technology stack is more flexible because we communicate with each other through language-agnostic protocols. For example, the mall recommendation system can be implemented with popular Python, and the product management system still uses Java. It doesn’t matter, because the communication protocols are language agnostic, which is one of its advantages.

Besides, the version update is more agile, because each module is separately maintained.

The most important thing is that it is more robust, which means that if a single module hangs up, not all of them hang up. For example, the logistics system has been suspended for an hour, but I can still purchase goods, register, and log in. This is a huge advantage for the microservice.

The Challenges of Microservice

Of course, there is no perfect thing in the world. These advantages will bring some other difficulties. What are the difficulties brought by microservices? First of all, its complexity will be higher, because it has numerous services, and you will have difficulties in managing them.

Also, because the services are distributed on different machines and different processes, their transactions are difficult to control. Considering a use case like cash transfer between bank accounts, a user deducted money from one microservice, and then called another service to transfer the cash. With the previous monolithic architecture, it can ensure the immediacy of transactions through the database. Then if it is distributed, it needs to ensure the immediacy of transactions through complex mechanisms. I will continue to talk about it in a later article.

Another challenge is the division of services. Now we do not have a standard of how to divide it. Different companies or even different departments within a company would have their division strategies.
The last one is the deployment. I just mentioned that because there are more services, it is much more difficult to deploy than a single architecture. In the past, the software may have only one application and one service, the deployment is easy. Now an application may have hundreds or even thousands of services, and deployment will have great challenges.

Summary

First of all, we briefly introduce what is monolithic architecture, its advantages, and disadvantages, we must continue to solve its disadvantages through a divide and conquer method, and then gradually evolved to a microservice architecture, which its characteristics and its advantages provide a huge improvement of the software design. At the same time, we also introduced some challenges that microservices architecture will face to achieve these advantages.

The post Migrating a Monolithic Architecture to Microservice Architecture appeared first on Artificial Intelligence.

Considering the time, cost and effort of building their own integrated development platform, many organizations — especially small to medium-sized organizations — turn to PaaS over an IaaS approach.

Platform as a service will provide a microservices development team with everything it needs to get an application rolling, including a prebuilt, fully provisioned development platform that developers can share, along with a set of preconfigured tools that integrate with that platform.

However, an organization may outgrow PaaS, especially if it begins to delve deeper into microservices development and the scaling out of the architecture. This doesn’t mean PaaS is not a good starting point, but it does mean that organizations may have to consider adopting the infrastructure as a service (IaaS) approach as an addition to, if not a replacement for, their PaaS foundation.

“The size of the organization is probably the most important factor,” Chris Tozzi, a DevOps analyst for Fixate IO, explained. “If you’re a startup with a small IT team [and] you don’t have staff with time available to set up a custom delivery chain, you probably would get better value from a PaaS. In that case, PaaS is often the easiest path to continuous delivery for small to midsized shops.”

On the other hand, it is possible for a microservices development team to need more than PaaS, according to Randy Shoup, VP of engineering at Stitch Fix. Shoup, who has overseen the expansion of Stich Fix’smicroservices architecture, describes PaaS as “a wonderful cage” that helps until developers want more freedom, especially as the scope of applications grows.

“The largest [organizations] will always exceed what the platform can do,” he said. “As your developers become more proficient in working with microservices, they may enjoy working in their own in-house development environment and the freedom to use whatever tools they want.”

He added that an organization may also simply want more control over microservices-based applications and the infrastructure that lies beneath them.

Another reason organizations may outgrow PaaS is that microservices developers and application managers begin to demand increased visibility into the underlying infrastructure of an application in order to fix problems or make quick changes. For instance, many PaaS options do not allow developers to see how requests are routed between applications and services, which can be important for some developers to know. With PaaS, developers will be dependent on a third-party IaaS provider to fix any underlying infrastructure issues. Sometimes, this approach does not reveal exactly what occurred.

“When it is slow for somebody to make a call to our billing service, I want to be able to get in there, diagnose it and fix it,” Shoup explained. “With all the PaaS platforms that I’m familiar with, I can’t do that.”

However, Shoup reiterated that, even for well-established organizations, PaaS is an effective launching point for revamping their software architecture and creating a functional, standardized development environment.

The post How long will PaaS work for microservices development? appeared first on Artificial Intelligence.