Integrating SOAP based Web Services into Red Hat 3scale API Management

In Red Hat 3scale API Management, we can manage any HTTP(S)-based APIs – including REST and SOAP. With REST, it is particularly straightforward as individual URL paths usually map quite nicely to operations. By operations, we mean fine-grained tasks and services which providers may wish to  a) get visibility into and b) apply control access to.

With SOAP, there is more of a challenge, as it is typical for multiple operations to share the same endpoint. Yet providers may still want to get the same visibility and control they get with SOAP as they get with REST.

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Low Latency API Management for Microservices framework Light-4-J – with Red Hat 3scale

In an earlier blog, we wrote about how very low latencies in Java-based microservices can be achieved through our plug-in wrapper. That solution was general in nature, applicable to any API service.

In this blog, we show that the plug-in wrapper is applicable to a specific microservices framework – the open source microservices framework Light-4-J. In particular, we took an implementation of a microservices chaining tutorial, built upon it, and applied our Java plug-in wrapper API management component to it.

As we stated in our first blog, this approach may be well used for a particular use-case, i.e. internal API traffic, typically microservice to microservice. Services exposed to external parties, outside the DMZ, can continue to use the API gateway deployment for its routing and security capabilities. And indeed this differentiates Red Hat 3scale from other vendors in that both the plug-in deployment and the gateway deployment are feasible.

Figure 1 – Plug-in approach: API Management intelligence and configuration are decoupled from traffic enforcement and reporting

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Ultra Low Latency API Management for Microservices with Red Hat 3scale

In this article, we provide a solution that enables almost latency free API management for Java-based microservices APIs. We build on Manfred Bortenschlager’s white paper Achieving Enterprise Agility With Microservices And API Management. We provide a practical solution for adding the management layer Manfred outlines to internal microservice-to-microservice API calls.

API Management and Microservices

Figure 1 – a typical microservices architecture with depictions of externally and internally consumable microservices

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In the white paper Manfred describes a typical microservices architecture consisting of:

  • A perimeter service layer that is typically implemented by an API gateway which manages and secures components that follow the backend for frontend (BFF) pattern. The perimeter service exposes APIs to external consumers.
  • Internal microservices that are clustered into functional elements and communicate via APIs.

The most common and most decoupled way to achieve API management is through deployment of API gateways on the API provider’s infrastructure. These gateways act as traffic controllers which authenticate, authorize, and report on API traffic to the 3scale API Management Platform. These extensive management features are achievable with very low latency overhead through our caching and asynchronous architectural features. Additionally the gateways provide excellent routing and security protections such as defense against DDoS attacks and more.

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