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S90-01 - Fundamental SOA & Service-Oriented Computing - BrainDump Information

Vendor Name : SOA
Exam Code : S90-01
Exam Name : Fundamental SOA & Service-Oriented Computing
Questions and Answers : 76 Q & A
Updated On : November 9, 2018
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S90-01 exam Dumps Source : Fundamental SOA & Service-Oriented Computing

Test Code : S90-01
Test Name : Fundamental SOA & Service-Oriented Computing
Vendor Name : SOA
Q&A : 76 Real Questions

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SOA Fundamental SOA

global device Infrastructure market report scrutinized in new analysis | killexams.com Real Questions and Pass4sure dumps

The international gadget Infrastructure Market comprises cloud software solutions that facilitate in expanding the efficiency of IT systems utilized with the aid of an organization. These options facilitate a company in appearing the primary initiatives and help the workflow of its enterprise.

probably the most key drivers of the market is carrier-oriented structure (SOA) and the continued vogue is emergence of database as a carrier (DBaaS).

document advisor has revealed an imaginitive file titled as global device Infrastructure Market analysis document 2018.

This document makes use of beneficial approaches like primary and secondary research that provides vital records. It comprises the ancient facts, the present state of affairs in addition to future predictions about the market.

It makes use of systematic methodologies to get to the bottom of the considerations. It reports positive methods, market shares, product of the organizations and investments out there is moreover mentioned utterly.

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The system Infrastructure Market is segmented on the groundwork of regions, category, utility and key avid gamers.

Market segment by means of place:

The market is generally spread all over the place the area. the important thing regions are u.s., eu, Japan, China, India, Southeast Asia, and significant & South the united states.

Market section by way of classification:

application as a carrier (SaaS), Platform as a service (PaaS), and Infrastructure as a service (IaaS).

Market segment via software:

Healthcare, Telecom, Banking, fiscal features and assurance (BFSI) and Retail.

Key players:

Key players are Oracle, Google, purple Hat, IBM, AWS, Microsoft, Apprenda, Bungee Labs, CA, Engine Yard, Qlik, and RACKSPACE.

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each and every and every element of system Infrastructure Market like drivers, restraints, and alternatives are examined rigorously to grasp the U.S.and downs of the businesses.

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Chapter 6: ecu equipment Infrastructure Market building reputation and Outlook

Chapter 7: Japan Market development popularity and Outlook

Chapter eight: China Market construction fame and Outlook

Chapter 9:  India Market construction repute and Outlook

Chapter 10: Southeast Asia system Infrastructure Market Outlook

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Chapter 12: Market Dynamics

Chapter 13: Market effect factors analysis

Chapter 14: system Infrastructure Market analysis Findings and Conclusion

Chapter 15: Appendix

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LDI suggestions for Managing the hazards which you can control | killexams.com Real Questions and Pass4sure dumps

Gary Veerman (beneath left), Head of LDI solutions, and Chris Anast (below appropriate), CFA, Senior Retirement Strategist, Capital community, pose and reply three questions all plan sponsors should still ask.

Plan sponsors have many elements to trust when making prudent pension risk administration selections. equity results, hobby rate movements, go with the flow route construction, Pension benefit guaranty organization premiums, contribution policy, company- selected possibility tolerance, actuarial assumption adjustments – the checklist goes on.

moreover, a lot of these variables are outdoor of a plan sponsor’s manage as they strive to obtain their ideal objective: paying benefit responsibilities to devise participants.

To cut in the course of the complexity, we define three simple pension risk administration questions that each one plan sponsors should ask themselves – regardless of their enterprise-particular situation.

Is pension asymmetry an element in my strategic asset allocation choices? Plan sponsors consider various types of possibility, and one of these is surplus chance – the variety of feasible funding reputation outcomes over time. Its simplicity makes it an intuitive and regularly used metric in pension asset-liability analysis.

right here’s the difficulty: pension plan effects are, definitely, asymmetrical. notwithstanding upside and downside scenarios may be equally possible, their have an impact on is terribly distinct.

We suggest that the “candy spot” for many plan sponsors is between a hundred% and 115% funded. Above this latitude, there are diminishing advantages to an accelerated funding level. beneath 100%, sponsors often take bigger positions in return-generating property with better chance with the goal of pushing funded popularity better.

at the exact conclusion of the sweet spot, say a hundred and fifteen% funded, sponsors certainly have a snug cushion to weather any “un-hedgeables” comparable to adjustments to actuarial assumptions, bond downgrades and modest funded fame drawdowns. Arguably, any funded status positive aspects above 115% funded result in little or no additional improvement to sponsor or participant. We frequently confer with this extra as a “trapped surplus” as a result of funded repute features past a undeniable point can not customarily be utilized to create value for the company or plan individuals.

On the flipside, when a plan’s funded reputation is below a hundred% there can be massive terrible implications. And it only gets worse as funded repute declines extra. The potential ache for sponsors increases exponentially, with limitations on lump sums, gigantic anticipated cash contributions, and a portfolio devoid of the asset base to assist shut the funding hole. In these low-funded scenarios, money contributions is generally the largest driver of plans increasing their funding place.

Am I hedging enough of my hobby expense risk? pastime costs proceed to be a sizzling subject, with many of the focus on where they might go. As many of us have experienced, together with trade consultants, accurately predicting the long run route of pastime rates is regularly a humbling event.

it is vital, although, to take into consideration two strategic elements when making activity expense hedging decisions. the primary is to recognize that pastime fee chance is an uncompensated risk. The 2nd factor to bear in mind is that hedging selections should still be in accordance with the forward fees as opposed to spot fees.

For a pension plan, equities and different return-producing belongings are often utilized to capture an expected return top rate in extra of liabilities, to aid improve the plan’s funded fame and to cover the plan’s ongoing service expenses and costs.

In contrast, the legal responsibility hedging portfolio is utilized to cut back volatility through improved matching the interest price sensitivity of the legal responsibility, in addition to grow with the liability’s interest charge. in keeping with these primary tenets, fairness possibility is a “compensated” possibility, while hobby expense risk is “uncompensated.”

additionally, whereas latest interest cost levels are observable and simple to reference, it’s truly forward prices that depend when making hedging choices. ahead rates are derived by using current spot rates and reflect the arbitrage-free pricing of activity prices in future durations. for this reason, forwards will at all times be greater than spot costs when the yield curve has an upward slope.

through definition, if ahead rates are realized, all returns throughout the yield curve are the identical over the time length analyzed. Importantly, this applies to both returns on hedging belongings in addition to liabilities. So, if forwards are realized, hedging belongings and liabilities could have the identical return due to pastime rate actions, all else being equal.

For an below-hedged plan, it is only when future pastime costs exceed the ahead curve that a plan will journey a advantage to funded repute. during this situation, liabilities will fall with the aid of greater than assets, growing a good funded status result for sponsors.

Am I the usage of my standard risk finances in the finest method viable?

Take a deeper dive and study the important answer to this third query all plan sponsors should still ask

Investments aren't FDIC-insured, nor are they deposits of or guaranteed by a bank or some other entity, so they can also lose price.previous consequences don't seem to be predictive of results in future durations.content contained herein isn't intended to serve as impartial investment or fiduciary assistance. The content has been developed by Capital community which receives expenses for managing, distributing and/or servicing its investments.Statements attributed to an individual characterize the opinions of that individual as of the date published and don't always mirror the opinions of Capital community or its associates. This guidance is meant to highlight considerations and will now not be regarded tips, an endorsement or a suggestion. Bloomberg® is a trademark of Bloomberg Finance L.P. (jointly with its affiliates, “Bloomberg”). Barclays® is a trademark of Barclays bank Plc (jointly with its associates, “Barclays”), used below license. Neither Bloomberg nor Barclays approves or endorses this material, guarantees the accuracy or completeness of any information herein and, to the highest extent allowed by legislation, neither shall have any liability or responsibility for damage or damages arising in connection therewith.

5 primary SOA concepts that nonetheless apply to microservices | killexams.com Real Questions and Pass4sure dumps

Cloud computing and virtualization lead the way for the emergence of microservices, however neither brought about the demise...

of certain SOA ideas. to look the place both align, take a step back from the details of implementation, and take a look at the advantages.

The mission of SOA

carrier-oriented structure (SOA) building addressed the onrush of genuine networked utility. For 50 years, builders usually developed application from modules that have been continually part of a larger monolithic application. improvements in networking brought forth the opportunity of distributing, scaling and redeploying accessories as necessary.

The basic SOA mannequin aimed to capitalize on these networking advancements in an effort to distribute software components, find components via a listing carrier and attach them without sacrificing safety or reliability. accessories might now supply services to different components and functions, exchange requests and responses over a community, and use an API broking service to find one one more.

Componentization

SOA and microservices share the concept of componentization. both architectures presume that applications will divide into add-ons and that a network connection will hyperlink these components.

Componentization permits work to unfold across multiple servers, which improves efficiency. It also enables team development on the grounds that components be a part of at a common, neatly-defined interface.

If we reinvented SOA today from scratch, we would very nearly obviously invent microservices in its place.

SOA additionally centered the idea of community coupling, which focuses on the potential for an architecture to treat a element accessed by the use of a community connection as even though it turned into a native component. SOA implementations usually achieved this via an evolved version of the old faraway system name, referred to as primary Object access Protocol.

in contrast, microservices use the web-oriented rest mannequin. This difference readily displays changes in programming practices caused by way of the web. relaxation calls the functions supplies, the place SOA calls them objects, but the two are identical.

Integration and discovery

network coupling is additionally linked to the idea of discovery and late binding. A component would not integrate at construction time -- which might be known as early binding -- but reasonably connects at runtime, which entails a discovery procedure for the interface to the part, established because the API.

With SOA, the invention method links to the accepted Description, Discovery and Integration (UDDI) listing, whereas microservices use an API broker for the same mission. This integration and discovery mannequin makes it easy to alternate a provider with out interfering with the relaxation of the application or related applications.

provider independence

a further one of the most SOA concepts that nevertheless applies in microservices is language independence. capabilities do not need to use the same programming language, middleware or OS as long as they support the common API.

Microservices are just a little more impartial of every different, due to the fact the RESTful APIs most effective use average internet-related tools and programming conventions. This implementation independence helps with code reuse and helps disperse work throughout the widest range of servers.

carrier classification

SOA principles added the concept of distinct classifications of features. greatly, services can guide a enterprise characteristic, equivalent to order entry, or a platform function, like journaling for compliance logging. Some SOA documents truly outline four specific provider courses, further dividing the useful side of the model.

Microservices additionally follows this service classification precept. youngsters, SOA services are usually extra explicit, whereas microservices typically classify functions via the elements they provide in preference to how they are invoked and structured.

Orchestration

another SOA concept that is still with microservices is the conception of application orchestration. With SOA, most purposes have been built round a carrier bus that offered message steering according to business rules, commonly authored within the enterprise technique Execution Language.

functions linked to microservices can use a number of equipment for orchestration, including the API broking service, a storefront part or even a mobile app.

The precise modifications

SOA and microservices often differ greater on implementation than on principle. As a remember of apply in preference to policy, most SOA purposes are developed around an commercial enterprise service bus that not simplest gives work steering inside an application, but additionally between connected functions. SOA concepts arguably subordinate componentization to within specific applications, but here's more a count number of apply, as mentioned.

an extra subtle implementation difference is that microservices are pretty much infrastructure tools in place of utility tools. SOA creates simple services, however with microservices, the add-ons are as separated as sites are on the information superhighway. there is commonly more reuse of microservices among functions, making it greater vital to manage the APIs and more complex to depend on application-selected fashions of deployment, redeployment and scaling.

If we reinvented SOA nowadays from scratch, we would nearly most likely invent microservices instead. this is not because microservices are absolutely distinctive and new, but because they resolve a protracted-standing difficulty rooted in software and networking ideas. SOA solved most of those complications in its time, and the basic principles it brought are only as legitimate these days.




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S90-01 exam Dumps Source : Fundamental SOA & Service-Oriented Computing

Test Code : S90-01
Test Name : Fundamental SOA & Service-Oriented Computing
Vendor Name : SOA
Q&A : 76 Real Questions

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Fundamental SOA

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Global System Infrastructure market report scrutinized in new research | killexams.com real questions and Pass4sure dumps

The Global System Infrastructure Market includes cloud software solutions that facilitate in increasing the efficiency of IT systems utilized by a corporation. These solutions facilitate a corporation in acting the fundamental tasks and support the workflow of its business.

One of the key drivers of the market is service-oriented architecture (SOA) and the ongoing trend is emergence of database as a service (DBaaS).

Report Consultant has revealed an innovative report titled as Global System Infrastructure Market Research Report 2018.

This report uses effective ways like primary and secondary research that provides crucial data. It includes the historical records, the present state of affairs as well as future predictions about the market.

It uses systematic methodologies to resolve the issues. It studies effective methods, market shares, product of the businesses and investments in the market is additionally mentioned thoroughly.

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The System Infrastructure Market is segmented on the basis of regions, type, application and key players.

Market Segment by Region:

The market is widely spread all over the world. The key regions are United States, EU, Japan, China, India, Southeast Asia, and Central & South America.

Market Segment by Type:

Software as a service (SaaS), Platform as a service (PaaS), and Infrastructure as a service (IaaS).

Market Segment by Application:

Healthcare, Telecom, Banking, financial services and insurance (BFSI) and Retail.

Key Players:

Key players are Oracle, Google, Red Hat, IBM, AWS, Microsoft, Apprenda, Bungee Labs, CA, Engine Yard, Qlik, and RACKSPACE.

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Chapter 4: Market Size by Type and Application (2012-2018)

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Chapter 6: EU System Infrastructure Market Development Status and Outlook

Chapter 7: Japan Market Development Status and Outlook

Chapter 8: China Market Development Status and Outlook

Chapter 9:  India Market Development Status and Outlook

Chapter 10: Southeast Asia System Infrastructure Market Outlook

Chapter 11: Market Forecast by Region, Type and Application (2018-2023)

Chapter 12: Market Dynamics

Chapter 13: Market Effect Factors Analysis

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5 basic SOA principles that still apply to microservices | killexams.com real questions and Pass4sure dumps

Cloud computing and virtualization paved the way for the emergence of microservices, but neither caused the demise...

of certain SOA principles. To see where both align, take a step back from the details of implementation, and check out the benefits.

The mission of SOA

Service-oriented architecture (SOA) development addressed the onrush of true networked software. For 50 years, developers typically built software from modules that were usually a part of a larger monolithic application. Improvements in networking brought forth the possibility of distributing, scaling and redeploying components as needed.

The basic SOA model aimed to capitalize on these networking advancements in order to distribute software components, locate components through a directory service and connect them without sacrificing security or reliability. Components could now provide services to other components and applications, exchange requests and responses over a network, and use an API broker to find one another.

Componentization

SOA and microservices share the concept of componentization. Both architectures presume that applications will divide into components and that a network connection will link those components.

Componentization enables work to spread across multiple servers, which improves performance. It also facilitates team development since components join at a common, well-defined interface.

If we reinvented SOA today from scratch, we'd almost surely invent microservices instead.

SOA also established the concept of network coupling, which focuses on the ability for an architecture to treat a component accessed via a network connection as though it was a local component. SOA implementations typically achieved this through an evolved version of the old remote procedure call, known as Simple Object Access Protocol.

By contrast, microservices use the web-oriented REST model. This difference simply reflects changes in programming practices brought about by the internet. REST calls the services resources, where SOA calls them objects, but the two are similar.

Integration and discovery

Network coupling is also associated with the notion of discovery and late binding. A component doesn't integrate at development time -- which would be called early binding -- but rather connects at runtime, which entails a discovery process for the interface to the component, known as the API.

With SOA, the discovery process links to the Universal Description, Discovery and Integration (UDDI) directory, while microservices use an API broker for the same mission. This integration and discovery model makes it easy to change a service without interfering with the rest of the application or related applications.

Service independence

Another one of the SOA principles that still applies in microservices is language independence. Services don't need to use the same programming language, middleware or OS as long as they support the common API.

Microservices are a bit more independent of each other, since the RESTful APIs only use common web-related tools and programming conventions. This implementation independence helps with code reuse and helps disperse work across the widest variety of servers.

Service classification

SOA principles introduced the notion of different classifications of services. Broadly, services can support a business function, such as order entry, or a platform function, like journaling for compliance logging. Some SOA documents actually define four specific service classes, further dividing the functional side of the model.

Microservices also follows this service classification principle. However, SOA services are typically more explicit, whereas microservices typically classify services by the features they provide rather than how they're invoked and structured.

Orchestration

Another SOA concept that remains with microservices is the idea of application orchestration. With SOA, most applications were built around a service bus that provided message steering based on business rules, often authored in the Business Process Execution Language.

Applications linked to microservices can use a variety of tools for orchestration, including the API broker, a storefront component or even a mobile app.

The actual differences

SOA and microservices often differ more on implementation than on principle. As a matter of practice rather than policy, most SOA applications are built around an enterprise service bus that not only provides work steering within an application, but also between related applications. SOA principles arguably subordinate componentization to within specific applications, but this is more a matter of practice, as noted.

Another subtle implementation difference is that microservices are essentially infrastructure tools rather than application tools. SOA creates basic services, but with microservices, the components are as separated as websites are on the internet. There's often more reuse of microservices among applications, making it more important to manage the APIs and more difficult to rely on application-specific models of deployment, redeployment and scaling.

If we reinvented SOA today from scratch, we'd almost surely invent microservices instead. That's not because microservices are totally different and new, but because they solve a long-standing problem rooted in software and networking concepts. SOA solved most of those problems in its time, and the basic principles it introduced are just as valid today.


Microservices, APIs and Integration | killexams.com real questions and Pass4sure dumps

I’ve been writing/speaking on the topics related to Microservices for a quite a sometime. Although many people now understand the fundamentals of microservices architecture, still there’s a quite a lot of confusion when it comes to the application of Microservices with API and Integration technologies.

From Monolithic Applications to Microservices

Let’s start our discussion with how the enterprise architecture has evolved from monolithic applications to microservices.

Monolithic Applications

When it comes to building a software solution to solve various business requirements, we’ve used(pre-SOA era) to build monolithic applications on top of various systems such as databases, file storages etc.(System of Records).

These applications are designed to facilitate numerous business requirements. Hence, a given software application offers hundreds of functions and all such functions are generally piled into a single monolithic runtime (e.g. ERP, CRM etc.). When it comes to inter-application communication, these applications use proprietary point to point style communication style(or connected with EAI solutions).

Figure 1: Monolithic Applications

Obviously this architecture has inherent limitations.The deployment, troubleshooting, scaling, and upgrading of applications was a nightmare and also point-to-point style communication nor having bulky EAI to connect these applications were not scalable.

SOA and ESB

Service-oriented architecture (SOA) is designed to overcome the problems resulting from monolithic applications by introducing the concept of a ‘service’. Each business functionality is built as a (coarse-grained) service(often implemented as Web Services)with several sub-functionalities and they are deployed in an application server which is a monolithic runtime. When it comes to consumption of business functionalities, often we need to integrate/plumb multiple services and other systems and consumers consume the virtual/composite services exposed from ESB layer. Hence ESB is used as the centralized bus that connects all these services and systems.

Figure 2: SOA and ESB

In this architecture, ESB layer comprises of various functionalities such as message routing, transformation, service orchestration and capabilities to implement various EIPs. Therefore, a significant portion of business logic is residing in ESB layer and it is developed, deployed and scales as a single monolithic runtime.

API Management

Exposing business functionalities as managed services/APIs has become a key aspect of the modern enterprise architecture. However, web services/SOA is not really the ideal solution to cater to such requirements due to the complexity of the Web Service related technologies such as SOAP, WS-Security, WSDLs etc. and the lack of features to build an eco-system around APIs(self-servicing etc.).

Therefore, the most organization puts a new API Management/API Gateway layer on top of the existing SOA implementations. This layer is known as the API façade, in which exposes a simple API for a given business functionality and hide all the internal complexities of ESB/Web Services layer.

Figure 3: Using API Management on top of ESB/SOA Microservices

Microservices architecture has emerged as a better architecture paradigm to overcome the drawbacks of the ESB/SOA approach. The monolithic nature of ESB and service hosting runtimes is the main hurdle when it comes to the agile development of services (such as running inside containers).

Hence, microservices architecture (MSA) encourages to develop a single application as a suite of small and independent services that are running in their own process, developed and deployed independently.

Also, Microservices architecture encourages to not to have a centralized ESB and disperse the logic that was residing in ESB into services (smart endpoints and dumb pipes) So, what that means is to demolish the ESB and application server layers into microservices and made them accessible through API Manager/Gateway.

Where is ESB/Integration?

If we completely remove ESB in Microservices architecture, where do we implement all sorts of functionalities that were offered from ESB such as message routing, creating service compositions/chaining, protocol and message format transformations, resiliency patterns and various other EIPs? This is one of the most common question and confusion that most of the people from enterprise integration domain have.

Many organizations who adopted micorservices architecture, initially tried to build their applications by building fine-grained microservices and plumbing them with point-to-point style communication. They pretty much use the same type of technology to build all these services (Java, Node etc.)

And even some implementations had the API Gateway as the main component that takes care of various service compositions and orchestrations. As these microservice implementations getting matured, they start realizing that treating all microservices the same is not the most effective approach and they can’t simply ignore the ESB capabilities or API Gateway capabilities that we had in previous architectures. And trying to build such capabilities using generic microservice development framework is a nightmare. Above all, they find that the most complex challenge in realizing microservice architecture is not building the services themselves, but the communication between services.

The most complex challenge in realizing microservice architecture is not building the services themselves, but the communication between services.

Although some ESB vendors try to exploit the same to resurrect the ESB in the microservices architecture, owing to its fundamental incompatibilities, ESB won’t be able to fit into the Microservices by any means.

Microservices Layered Architecture

It is important to understand that, the tasks that an ESB does in an ESB based SOA implementation, don’t simply disappear when you switch to Microservices Architecture. Rather, all ESB/integration functionalities are segregated and dispersed among all the microservices.

So, if we have a closer look at the microservices implementation, we can identify different types of services that we can categorize into few different layers. We can come up with a layered architecture as shown in figure 4 ( I originally proposed as a logical set of layers, but this could well be a concrete layered architecture too) with different microservices types.

Figure 4: Microservices Layered Architecture

So, based on service functionalities and granularities, we can identify following service categories.

1. Core/Atomic Micoservices

At the bottom layer, we have fine-grained self-contained services (no external service dependencies) that mostly comprise of the business logic and less or no network communication logic.

2. Composite/Integration Microservices

Atomic microservices are often cannot be directly mapped to a business functionality as they are too fine-grained. Hence a specific business functionality may require a composition of multiple atomic/core services. The middle layer comprises of such composite or integration microservices. These services often have to support a significant portion of ESB functionalities such as routing, transformations, orchestration, resiliency and stability patterns etc.

Composite/integration services are coarse-grained(relative to atomic services), independent from each other and contains business logic(routing, what services to call, how to do data type mapping etc.) and network communication logic(inter-service communication through various protocols, resiliency behaviors such as circuit breakers).

Most of the ESB/integration capabilities(such as EIPs, resiliency and stability patterns) are realized in Microservices architecture at the composite/integration services layer.

These services also could bridge the other legacy and proprietary systems(e.g SAP ERP), external web APIs (e.g. Salesforce), shared databases etc. (often known as the anti-corruption layer).

3. API Services/Edge Services

You will expose a selected set of your composite services or even some atomic service as managed APIs using API services/Edge services.These services are a special type of composite services, that apply basic routing capabilities, versioning of APIs, API security patterns, throttling, apply monetization, create api compositions etc.

Technologies for building Microservices

When it comes to implementation of microservices, most of the current microservices implementation arbitrary use a given framework or a programming language to build microservices without taking the different service types into the account. With the proliferation of the number of services, this will lead to design, implementation and scalability nightmares. Therefore, we need to pick the right technology, based on the nature of the microservices that we are developing.

Core/Atomic Services: Most of the existing technologies are focusing on building these services. There are numerous of frameworks/libraries available for build this type of services (e.g. SpringBoot, Dropwizard, WSO2 MSF4J)

Composite/Integration Services: Most of the current microservice implementations tried to use the same set of technologies to build both core/atomic services and composite/integration services. However, most of the microservices frameworks and platforms are not designed for building composite services.

Therefore building composite services is becoming the most challenging task(just imagine the amount of work related to implementing various integration patterns from scratch, using Java or any other similar programming language) in realizing microservices architecture.

To overcome this problem There are emerging technologies such as Ballerina (which is a programming language designed for service compositions and network interactions), and Service Mesh frameworks (With ‘Service Mesh’ you can offload the network communications to the service mesh and we can only focus on Business logic. E.g. you don’t need to worry about circuit breaking when you call another service).

API/edge Services: Most of the existing (monolithic) API Management and gateway solutions can facilitate these service, as long as API services contain minimal business logic. However, most microservice implementations try to put a massive amount of business logic into this layer, while keeping it as a single monolith. That’s not a sustainable architecture and it violates the key principle of Microservice. So, there are two possible approaches to overcome this problem.

  • Offload the compositions to composition layer and can use a monolithic gateway for just exposing them as APIs.
  • Segregate API Gateway runtime(micro-gateway concept) so that each API/edge service can be built and manage independently.
  • The same technologies that we use to build composite service can also be used in API/edge service development. So, most of the existing (monolithic) API Management/Gateway solutions are still evolving to support concepts such as micro-gateways.

    Conclusion

    Hope this post was helpful to clear up some of the doubts you had related to to practical usage of microservices, APIs and integration. We can summarize the key takeaways from this post as follows:

  • The layered microservices architecture that is discussed in this post is quite powerful to address the different aspect of service implementation.
  • Integration never disappears! Rather it’s morphing into different forms of implementation (point-to-point -> ESB -> composite services).
  • The traditional ESB/integration capabilities have dispersed into composite microservices layer and externally consumable services are exposed through API Management layer.
  • We need to select the appropriate technology set for each microservices category.
  • I’m also planning to write on some of these topics in-detail. Stay tuned!



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