A deep dive into possible architectural choices for an inter-service communication style. A client makes a command or a request to a service by sending it a message. In this article, we delve deeper into various communication patterns utilized in microservices architecture, focusing on the Service Mesh. ASP. request-response; the most typical usage in between the Client and the API gateway or a microservice; in this type the client send a request and waits for the response; its the simplest but less scalable or resilient; be aware of cascading failures in nested calls between multiple. As you know that we learned practices and patterns and add them into…Integration Patterns for Asynchronous communication. The microservices pattern language — a collection of patterns that solve architecture, design, development, and operational problems — enables software developers to apply the microservices architecture effectively. The Circuit Breaker pattern is a crucial pattern in making synchronous communication in microservices more resilient. It auto resets and monitors services. Akhan Akbulut et al. Rather than simply advocating for the use the microservice architecture, this clearly-written guide takes a balanced, pragmatic approach, exploring both the benefits and drawbacks. [24] analysed the performance of microservices. Figure 4-22. While anti-patterns are prevalent in various types of systems, the automated detection of anti-patterns in microservice (MS) systems is a relatively new domain. We can. The vast majority of these I’ve used in production, but they all are valid ways (IMO) to build serverless microservices. This means it doesn’t force teams to use specific tools and technologies; rather, it suggests technologies that address the pattern. [45] address the deployment and communication patterns in MSA, whereas. If this is implemented using some variation of the dual writes pattern, communication could become lost and parts of the distributed transactions could become orphaned — especially in a cloud environment. Some of these have legitimate names that people have coined over the years. The most prevalent communication patterns in microservice-based systems are Remote Procedure Call (RPC) and Messaging. communication, and integration patterns that help address some of the more common challenges and opportunities, including the following: Backend-for-frontend (BFF) pattern. When clients communicate directly with microservices, this. Author (s): Chris Richardson. This allows teams to easily change authorization coding for policies without changing the coding for the app. We covered integrations patterns and some approaches for implementing microservices using containers. Microservices must communicate using an inter-process communication mechanism. We explore in this chapter the role that JWT. In this unique book, microservice architecture pioneer and Java Champion Chris Richardson collects, catalogues, and explains 44 patterns that solve problems such as service decomposition, transaction management, querying, and inter-service communication. This explains both the fundamental integration patterns in addition to all the use-cases of this blog series. Solution. There are many more benefits and features of. In a monolithic. JSS. The other type of microservice communication, asynchronous, allows a service to continue with its tasks after sending. It brings a lot of benefits, especially over obsolete monolith architecture. Any of these types of communication patterns could be used to facilitate eventual consistency, the concept of synchronizing data between multiple services. My virtual bootcamp, distributed data patterns in a microservice architecture, is now open for enrollment! It covers the key distributed data management patterns including Saga, API Composition, and CQRS. The Saga pattern is one of the microservice design patterns that allow you to manage such transactions using a sequence of local transactions. The following is a simple guide to understanding microservices and the basic external communication design patterns that a microservice based architecture might use. Figure 4: Microservice Architecture with Asynchronous Communication. This is a step-by-step process for software system design and evolve from monolithic to microservices following the patterns & principles. in Java communicate with each other via an inter-process communication protocol. Microservices enable teams to create small, siloed pieces of functionality where each team owns their whole stack. The source of output is divided on breaking the monolithic architecture into microservices. Love traveling and experiencing life. Supports a variety of communication patterns including request/reply, notifications, request/async response, publish/subscribe, publish/async response etc This pattern has the following drawbacks: Additional complexity of message broker, which must be highly available This pattern has the following issues: There are two basic messaging patterns that microservices can use to communicate with other microservices. Service Design. 2. Simple Messaging. js and Express Specialization. Publish-Subscribe Pattern: Involves one-to-many communication, where it publishes a message to multiple subscribers. Services must handle requests from the application’s clients. A workflow is a series of interconnected activities that are. API Gateway Pattern. This is when a microservice is too large, complex, or tightly coupled and behaves like a mini-monolith. These patterns require interacting with multiple services (and their respective databases), making transactional workflows (with ACID compliance) difficult to implement. Figure 4 shows a scenario of implementing an asynchronous OCR processing system. One of the most important concerns is database design. ts file ClientModule registers the list of services that the API gateway needs to access along with their transport protocol. Microservices Guide. Likely increases latency of responses as a result of the anti-pattern above. Microservices Patterns teaches enterprise developers and architects how to build applications with the microservice architecture. Benefits of Using a Microservices Architecture. Recall that in the previous two design patterns, each microservice committed locally to its database and subsequently published an event. By mastering these patterns, you will be well-equipped to build powerful, fault-tolerant, and easily maintainable software systems. A popular option for removing microservice coupling is the Materialized View pattern. It leverages centralized traffic flow to provide visibility into business and infrastructure metrics. The API gateway is a pattern used for microservice architectures. Step 6. Step 8 . My virtual bootcamp, distributed data patterns in a microservice architecture, is now open for enrollment! It covers the key distributed data management patterns including Saga, API Composition, and CQRS. Source code example repository The series post’s will reference source code examples in the Github repository. 7 Modern Microservice Design Patterns. Microservices - also known as the microservice architecture - is an architectural style that structures an application as a collection of loosely coupled services, which implement business capabilities. As the name implies, a microservices architecture is an approach to building a server application as a set of small services. It can be used to carry the identity of the calling microservice, or the identity of the end user or the system that initiated the request. The Integration design patterns are used to handle the communication between different microservices and also how to obtain the response across services and send it to the client while maintaining. timeoutInMilliseconds. Do you want to learn how to develop cloud native applications using microservices in Java? This IBM Redbooks publication provides you with the best practices for Java microservices, covering topics such as service discovery, communication, data handling, security, testing, deployment, and management. In synchronous communication, calls create a chain of dependencies through all the downstream services. Microservice Antipatterns and Pitfalls - Microservice mostly known antipatterns and pitfalls. Dec 25, 2022. The fundamental security requirements. Synchronous communication. The purpose of this article is to present a new communication pattern for the frontend in the microservice architecture, specifically addressing the challenges associated with the widely used. BFF (Backends for. Microservice 1. For more serverless learning resources, visit TAGS: contributed, messaging, serverless. This communication pattern can be defined as a method in which one microservice. We have understand how to design Restful. One of its goals is that teams can develop and deploy their. We deliberate and reason to select a fitting architectural design. Rather than simply advocating for the use the microservice architecture, this clearly-written guide takes a balanced, pragmatic approach, exploring both the benefits and drawbacks. This approach is used for queries and when accepting update or transactional commands from the client apps. A composite microservice will make calls to all the required microservices, consolidate the data, and transform the data before sending back. A technology like SignalR is very effectively used for this type of. A saga is a sequence of local transactions. Microservice Architecture is an architectural development style which builds an application as a collection of small autonomous services developed for a business domain. 4. Faster project development. Microservices often rely on distributed data management, which can be complex. This post will consider the specific design patterns that can help us build reliable, secure and traceable microservices. We will compare the API gateway pattern and the Direct client-to-microservice communication. What design patterns are available for inter-service communication for microservices? Here are a few patterns to note: Saga Pattern: A sequence of transactions, each one local to its database. Messaging integration pattern is well suited for asynchronous (fire-and-forget) communication, where the microservice needs to send a message and not wait for a response from the receivers. Posted on July 5, 2017. There are two basic forms of microservice communication: synchronous and asynchronous. A microservice triggers another via an event or message. And lastly we have Event Source mapping communication when polling queue records from lambda services to AWS SQS-Simple Queue Service for Decouple Microservice and processing events. Styles of Microservice Communication. Communication between microservices should be as lightweight as possible and should typically be aware of just the contents of. No need to scale whole systems when there is a need to scale just few services. Distributed computing concepts have proliferated with cloud computing concepts in the past decade. Learn about common microservice communication patterns and protocols, and how they differ in software architectures. Polyglot environments that need to support mixed programming platforms. Viktor Gamov. Enterprise Microservices: Benefits,… by Soumik Majumder Aug 7, 2023 An in-depth guide to understanding enterprise microservices: what they are,… 8 Microservices Data Management Patterns by Ashwin Dua Sep 20, 2022 Microservices data management patterns 1. Provider Microservice's Consumer Contract test suites are included in its automated test. Patterns — Technology agnostic, generic designs that address common business problems. In the microservices architecture, services are autonomous and communicate over the network to cater a business use case. Circuit Breaker Pattern. First and foremost, ensure you have the React development environment set up. Download PDF. Database per service pattern 2. These types of messaging patterns are called actor-style patterns. The API Gateway Pattern is another common design pattern used in microservices architecture that involves an API gateway, which acts as an entry point for all incoming API. microservice communication patterns. This book teaches enterprise developers and architects how to build applications with the microservice architecture. Other Considerations. These patterns provide a solid foundation for designing and managing microservices-based applications. RestTemplate is a class available under spring. Summary: Using the bulkhead pattern, we allocate resources for a specific component so that we do not consume all the resources of the application unnecessarily. modern API architectural. with the described patterns: A microservice application is a composite system, so communication is necessary to implement interprocess communication (IPC) for. Transactional Messaging. May 12. This implementation was done primarily because the demands for queries and for transactions are drastically different. module. In microservices and network messaging, synchronous communication uses blocking and solicited semantics: one party makes a request and waits for the other to respond. Microservices communicate with each other using various communication patterns. Communication and Coordination Between. Microservices is more about applying a certain number of principles and architectural patterns as architecture. Design patterns for microservices Azure Cloud Services The goal of microservices is to increase the velocity of application releases, by decomposing the application into small. command. This enables the microservices to evolve without impacting the clients. Mutual TLS extends the client-server TLS model to include authentication of both communicating parties. Make sure the microservices design ensures the agile/independent development and deployment of the service. Communication Between Microservices. Tight coupling, on the other hand, enables components to maintain. We should also follow some other design patterns (Best Practises) I. If you use this approach, make sure that the individual microservices cannot be reached directly (without the API Gateway) unless additional security is in place to. The request from the client can be directly sent to the Service C and Service B simultaneously. A saga is a sequence of local transactions. In a monolith, everything is simple. Whereas, for a read-heavy system, synchronous communication works well. Problems in the Network Communicating over the network introduces reliability concerns. (2019). These microservices patterns are divided into five main. Ok, so you drank the microservice kool-aid and that’s everything you intend to do from now on. O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers. While simple, this pattern obscures the network and pretends that it is. In this chapter, we introduce a catalog and a taxonomy of the most common microservices anti-patterns in order to identify common problems. Microservice architecture arranges the application in the form of loosely coupled services that can use protocols, like HTTP, for communication. We have understand how to design Restful. Let’s learn what a microservice is, the largest benefits of microservices for modern development environments, and some potential disadvantages of a microservices architecture. The real challenge with the microservices type implemention is the inter-microservice communication. [44] focus on the microservice security, Karabey et al. However, with the right design patterns, such as aggregator or API gateway, you can simplify service management and improve communication between services. In this blog series, I am going to give you more knowledge on the key design principles of Microservices to make it as the desired solution to have a scalable, easy to maintain. Integration patterns address the communication between services and other components. … Serverless Architecture vs. Here, the OCR operation is considered to be a. gRPC supports four communication patterns: simple RPC, server-streaming RPC, client-streaming RPC, and bidirectional RPC. 2. Saves lots of money! Microservices. A solution is eventual consistency and event-driven communication based on asynchronous messaging. A deep dive into possible architectural choices for an inter-service communication style. Monitoring. Gain a foundational understanding of a subject or tool. Service mesh patterns offer a range of features, including the following: Secure service-to-service communication using mTLS; Load balancing;. client that acts as a synchronous client to perform HTTP requests. In the below example, we have used getForEntity method that accepts complete URL of the. Evolutionary. Microservice Pattern Microservice Pattern Microservice Pattern Microservice Pattern. Figure 4: Communication patterns in a simple microservices application. Supports a variety of communication patterns including request/reply, notifications, request/async response, publish/subscribe, publish/async response etc This pattern has. Encrypt and Protect Secrets. Services B, C, and D can register. Microservice architectures enable you to create scalable, flexible, and resilient distributed cloud applications. For more on choosing the right communication tools and patterns, see What to Choose for Your Synchronous and Asynchronous Communication Needs. There are many security challenges need to be addressed in the application design and implementation phases. gRPC Communication Patterns. This style of inter-service communication is achieved using message brokers. It also works as a proxy service and. What are Microservices? Microservice is a small, loosely coupled distributed service. Broadly speaking, the services in the microservice architecture can be configured to communicate in one of two ways: synchronously or asynchronously. In this pattern, a service calls an. 1. This is my favorite and probably the best course to learn Service Oriented Architecture online. Next, scroll down to the “Configure New Token” section and give it a name like “PHP microservices. Feel free to open an issue or create a pull request with your additions. So microservices interact using inter-process or inter-service communication styles. 2. A single service might split into two or more services, and two services might merge. Example use case can be like a price change in a product microservice. Central to this paradigm is the concept of inter-service communication. A Microservice Platform is fundamental for an application's health management. A microservices architecture is a type of application architecture where the application is developed as a collection of services. If the Provider changes the. Communication Patterns:. Microservices offer a streamlined approach to software development that accelerates deployment, encourages innovation, enhances maintainability, and boosts scalability. The microservices architecture moves application logic to services and uses a network layer to communicate between them. Increases complexity (cost) of troubleshooting which results in additional time to restore. They cover various aspects, such as communication and messaging between services, service discovery, scalability, fault tolerance, database management, storage, etc. Others must track the messages that they have processed in order to detect and discard duplicates. But from development through testing to release, each microservice is isolated from all other microservices. In microservices architectures, a transaction involves calling multiple services. Design Patterns for Microservices:-1. Transportable microservice. The major benefit of this pattern is reduced communication overhead between the client and services, especially. Asynchronous communication in terms of microservices architecture stands as a potent strategy, facilitating versatile and streamlined interactions within microservices-driven architectures. The microservices architecture offers tremendous benefits, but it’s not a silver bullet. This method relies on small, loosely coupled services that communicate through well-defined APIs, which are managed by autonomous teams. We deliberate and reason to select a fitting architectural design. Direct Client-To-Microservice Communication (Image by Author) This method could be good enough for a small microservice-based application. FastAPI Microservice Patterns: Local Development Environment. Release date: November 2018. Fault-tolerant patterns for Microservice. Deployment patterns – Introducing new versions of microservices is the point where we’re most likely to break. Microservice is a small, loosely coupled distributed service. Branch microservice pattern is a mix of Aggregator and Chain design patterns and allows simultaneous. Develop job-relevant skills with hands-on projects. But on the other hand, service-to-service communication needs some trust in the form of mutual TLS or secure JWT. If you're using an API Gateway, the gateway is a good place to authenticate, as shown in Figure 9-1. Published in Design Microservices Architecture with Patterns & Principles · 17 min read · Sep 7, 2021 7 In this article, we’re going to learn Microservices. ASP. Now, each microservice has its own server and listens on a different port. . As a result, microservice design patterns have surfaced. The product catalog microservice uses a no-sql document database which is mongodb. For more on choosing the right communication tools and patterns, see What to Choose for Your Synchronous and Asynchronous Communication Needs. Some of the common anti-patterns include Break the Piggy Bank, Cohesion Chaos, Versioning Avoidance, Gateway for each service, Everything Micro, and so forth. In this. Benefits of Microservice . In software engineering, a microservice architecture is a variant of the service-oriented architecture structural style. In an active composition pattern, microservices communicate using request-response style communication, where a given microservice can invoke one or more other microservices using synchronous messaging protocols such as REST/HTTP, gRPC remote procedure call, and the GraphQL API query language, among others. The proxy pattern can simplify microservice communication by providing a flexible and powerful way of controlling and managing the interaction between services. Microservices can run without being impacted by the availability and performance of other microservices, making it autonomous even when communicating with other services. Loose coupling reduces the dependency between components and enables them to break down into definable elements with particular goals. The complex problems shown in Figure 4-22 are hard. Microservice communication patterns. Figure 4-12. Microservice Communication Patterns. Microservice Patterns - Microservice architecture patterns and best practices. It is possible to process the responses and requests from two or more separate microservices at once using the branch microservice design pattern. Microservices have to Communicate with multiple microservices in order to complete any complex functionality. A relevant point here is that there, the sender doesn't need to wait for the response. The following 19 patterns represent several common microservice designs that are being used by developers on AWS. Microservice Patterns and Best Practices starts with the learning of microservices key concepts and showing how to make the right choices while designing microservices. Microservices communication. Microservices for the frontend. Patterns for these interactions include: Open host service , which specifies a protocol like REST for how a service can be used. In this method, the contract test can assist in maintaining Microservice Communication's integrity in an automated manner. In this approach, a client app can make requests directly to some of the microservices, as shown in Figure 4-12. Synchronous backend microservice-to-microservice communication where an immediate response is required to continue processing. The AzureCAT patterns & practices team has published nine new design patterns on the Azure Architecture Center. To learn more about this I highly recommend to read the chapter Interprocess communication in a microservice architecture from the book Microservice Patterns: With examples in Java. Supports easy communication between dependent microservice instances. In Figure 4-12, one microservice, called a Producer, sends a message to another microservice, the Consumer, commanding it to do something. It allows you to take a large application and. The most common type of communication between microservices is single-receiver communication with a synchronous protocol like HTTP/HTTPS when invoking a REST API. Service discovery is a pattern used in microservice architecture to help services locate and communicate with each other. Supports Visual St. Microservices architecture is a software system architecture that is designed as a collection of loosely coupled independent services. 11 min read · Nov 13, 2020 10 Handling inter-process communication & execution flow in microservices The Earth (Source: Pixabay) The goal of the microservices is to sufficiently. There are many more benefits and features of. It’s a type of pattern which acts as an key concept in microservices architecture, where addressing data consistency across services is done by splitting transactions into local transactions handled by individual services. Decoupled services, driven by business capacities and independently deployed. Design patterns for microservices. Central to this paradigm is the concept of inter-service communication. When the application is large, with dozens of microservices, there are challenges and limitations if the application requires direct client-to-microservice communications. The microservice architecture is being increasingly used for designing and implementing application systems in both cloud-based and on-premise infrastructures, high-scale applications and services. Asynchronous communication with AWS Serverless Eventbus which is EventBridge for applying Event Driven asynchronous Communication patterns. Simple. This course is part of the RESTful Microservices Using Node. Resilience patterns for inter-service communication A common mistake in distributed computing is assuming that the network will be reliable. ISBN: 9781617294549. Nest Js supports MQTT (lightweight), Kafka (Powerful), RMQ (Rabbit MQ), and Redis (key based) which all are types of Publisher and Subscriber based models. Drawbacks of the direct client-to-microservices communication. When designing how your services will communicate, you need to consider various issues: how services. On the other hand, we will also study asynchronous communication, characterized by message queues, publish-subscribe patterns, and its non-blocking nature, which plays a. Reduces availability as a result of the multiplicative effect of failure (per article above). Enable side by side testing of different microservice versions. If a local transaction fails because it violates a business rule then the saga executes a series of compensating transactions that undo the changes that were made by the. The message sent to Microservice C mostly likely will contain information that is relevant to the concern of Microservice C. Figure 6-18 below, shows a PriceUpdated event published through an event bus, so the price update is propagated to the Basket and other microservices. Style — High level, abstract, approaches to integration that represent a number of specific patterns. default. Redis Streams is a lightweight asynchronous message broker that is both an immutable time-ordered log data structure and event store. Each local transaction updates the database and publishes a message or event to trigger the next local transaction in the saga. 0,” and set . It also has some significant drawbacks. 1016/J. The Ordering microservice may need the Shipping microservice to create a shipment for an approved order. The Anti-Corruption Layer (ACL) Pattern is a design pattern used to isolate and insulate a microservice from another service with a different domain model or communication protocol. Observability refers to the. Watch the AWS re:Invent 2019 talk “ Application integration patterns for microservices ”. To counter this Asynchronous communication using the pub/sub model comes into play. My virtual bootcamp, distributed data patterns in a microservice architecture, is now open for enrollment! It covers the key distributed data management patterns including Saga, API Composition, and CQRS. Service Discovery. Find out the pros, cons, and use cases of each pattern. The following is a simple guide to understanding microservices and the basic external communication design patterns that a microservice based architecture might use. Microservice 1 will only wait for a response from service bus that the message was successfully submitted to the queue, but will not wait for microservice 2. However, in the microservice architecture, all components of the application run on. Asynchronous communication with AWS Serverless Eventbus which is EventBridge for applying Event Driven asynchronous Communication patterns. #8. Laravel Workflow is a package for the Laravel web framework that provides tools for defining and managing workflows and activities. Download PDF. When building microservice networks, async communication is preferable to sync communication. Direct client-to-microservice communication. The microservices architecture offers tremendous benefits, but it’s not a silver bullet. Let’s imagine you are building an online store that uses the Microservice architecture pattern and that you are implementing the product details page. Microservices communication patterns and protocols are essential for designing scalable, reliable, and resilient software architectures. Saga Pattern. The increased interest in microservices within the industry was the motivation for documenting. There are two basic messaging patterns that microservices can use to communicate with other microservices. All microservices in a project get deployed in production at their own pace, on-premise on the cloud, independently, living side by side. Let’s take a look at different types of microservices data management patterns. As a summary for Asynchronous communication, we can consider that the client microservice sends a message or event to the broker systems without waiting for. Sync communication can be secured using mTLS, TLS, and several additional security. With each microservice responsible for its own data persistence. An aggregator service would be the one that provides the common public API which is consumed by the clients. Service 1 fires a message to a message. We’ll look at the characteristics of synchronous communication and examine scenarios where this approach shines as the ideal choice for specific microservice interactions. For example, two microservices might be merged. Each local transaction updates the database and publishes a message or event to trigger the next local transaction in the saga. If not, create a new React application using Create React App: npx create-react-app react-microservices-app. Implement a Centralized Authentication and Authorization Mechanism to Secure Access to the MicroServices. Transportable microservice. Service-Oriented Architecture [Best Coursera Course]. When you enroll in this course, you'll also be enrolled in this Specialization. Step 9 . 1. This requires a layer that translates communication between the two. As part of domain-driven design, each service can have a dedicated database with its own unique data model and service level agreement performance goals. Each one, as we are going to see, comes with its own benefits and tradeoffs. This whitepaper explores three popular microservices patterns: API driven, event driven, and data streaming. Databases. Feign. Thus, the Java Microservices architecture is not so different from the traditional microservice architecture. Backends for Frontends (BFF) pattern. The Database per Service pattern describes how each service has its own database in order to ensure loose coupling. The most common model for application steering of work is the API broker design pattern, where a master component (the broker, in this case) receives work from the source. 10. Microservices are deployed as containers in a cluster where containers can be provisioned and scaled in response to traffic. Microservices design patterns have become increasingly popular due to their ability to improve software agility, scalability, resilience, and maintainability. DDD patterns help you understand the complexity in the domain. To be able to study this, we first performed an iterative study of a variety of microservice-related knowledge sources, and we refined a meta-model which contains all the required elements to help us reconstruct existing. We will make E-Commerce Domain analysis in order to define your microservice boundaries. Publisher (s): Manning Publications. Microservice Patterns and Best Practices starts with the learning of microservices key concepts and showing how to make the right choices while designing. The first part is emphatic about the need to use ubiquitous language for communication between those responsible for the business, and the engineering team responsible for the development. In this blog, we will dive into the top 12 microservices patterns that every software engineer must know. What design patterns are available for inter-service communication for microservices? Here are a few patterns to note: Saga Pattern: A sequence of transactions, each one local to its database. In this way, message senders and consumers can coordinate which requests are consumed by which. A service mesh is often implemented using the Sidecar pattern. Microservice architecture has been an emerging trend in software architecture over the past few years and holds many promises: faster time to market, better scalability, and. A relevant point here is that there, the sender doesn't need to wait for the response. Other considerations must be considered when using microservices, we refer to (Taibi et al. After that, the client can get the message from the broker. Database - the database that stores the business entities and message outbox. g. Messaging is a key element of application development. If something fails, reverse operations undo the changes. An example of an anti-pattern in microservice design is the monolithic microservice. Most enterprise software development has moved their monolithic software architecture. And across message broker systems like Kafka. Microservices also typically use messaging protocols for asynchronous communication between microservices. With the evolution in cloud computing, Microservice architecture has significantly become popular as a new architectural pattern and a software development architecture. This is the 2nd part of the Microservice design pattern blog series. Messaging integration pattern is well suited for asynchronous (fire-and-forget) communication, where the microservice needs to send a message and not wait for a response from the receivers. g. In Figure 4-12, one microservice, called a Producer, sends a message to another microservice, the Consumer, commanding it to do something. The microservice defines an approach to the architecture that divides an application into a pool of loosely coupled services that implements business requirements. Get Building Microservices, 2nd Edition now with the O’Reilly learning platform. These case studies demonstrate how various communication patterns and protocols are implemented within microservices architectures to address specific challenges and optimize system. External versus internal architecture and design patterns. When you develop microservices that talk to authorization servers and other services, the microservices likely have secrets that they use for communication. However, inter-microservice communication can be a little challenging and tricky. This is a powerful architecture pattern. Increase delivery speeds with a DevOps culture. In contrast to the chained design pattern, the request is passed to two or more chains of mutually exclusive microservices rather than being passed sequentially. 2.