Exploring the Power of API Gateway: A Single Entry Point for Web Applications and API Microservices
Tags: api, apigateway, aws, microservices
Published: 2024-02-25 18:07:55

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<h2 class="wp-block-heading"><strong>Introduction</strong></h2>
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<p>The demand nowadays of security, efficiency along with scalability has been seen alot in the environment of API , Microservices and Web Applications. The difficulty in usage of the Microservices architecture has been a great challenge to the organization of their path to meet the unique needs of users. By offering the straight and easy approach to the solution of these problems, API gateway is used in these scenarios.</p>
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<h3 class="wp-block-heading"><strong>Brief Overview of the Growing Complexity</strong></h3>
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<p>With the facilities of serving the solutions to the global user base, API Micro services along with Web applications have become the major part of digital experiences. The difficulties are faced because of its unique requirements and functions. Efficient management is very necessary for the delivery of security, scalability and optimal performance.</p>
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<h3 class="wp-block-heading"><strong>Introduction to the Concept of API Gateway</strong></h3>
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<p>A designed strategic component for the purpose of simplifying the Microservices and API’s is <a href="https://docs.aws.amazon.com/apigateway/latest/developerguide/welcome.html">API Gateway</a>. It offers a large range of functions along with performance options to increase the security, it also acts as a unique entry point. The API Gateway also helps with communication in between the services and the clients. The core features along with the challenges are discussed in this article, the solutions to the challenges are also provided for the complicated and complex nature of API Microservice and web application.</p>
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<h3 class="wp-block-heading"><strong>Purpose of the Article</strong></h3>
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<p>The main purpose of the article is to focus up on the countless advantages of shifting to API Gateway. The primary functions of the API Gateway will be looked into, advantages will be highlighted along with the understanding of the process of implementation.</p>
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<h2 class="wp-block-heading"><strong>Understanding API Gateway</strong></h2>
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<p>A crucial role is played by the API Gateway by emerging as a main part in Optimizing interactions along with the orchestrating between clients and services.</p>
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<h3 class="wp-block-heading"><strong>Definition and Role of API Gateway</strong></h3>
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<p><strong>API Gateway Defied:</strong></p>
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<p>A solution that is used as an entry point or gateway in the application to provide the interface for the request from external to use different types of Microservices. To streamline and simplify the communication between the services and clients, API Gateway is used.</p>
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<p><strong>Role in the context of Web Applications and Microservices:</strong></p>
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<p>API Gateway serves as the main hub in the world of Architectures of <a href="https://microservices.io/">Microservices </a>and web applications, helping the external entities to be in contact with the set of Microservices of application.</p>
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<h3 class="wp-block-heading"><strong>Key Functions of an API Gateway</strong></h3>
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<p><strong>Routing and Request Forwarding</strong></p>
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<li>The help in the systematic routing of the requests received to the Microservice is looked at by the API Gateways. To make sure that the requests are received by the backend services, it also acts as the intelligent traffic director.</li>
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<p><strong>Authentication and Authorization</strong></p>
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<li>The most important thing in modern applications is security. The facility of security checkpoint is also provided by the API Gateway for the Authorization and Authentication.</li>
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<p><strong>Rate Limiting and Throttling</strong></p>
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<li>To make sure the service is not overloaded or misused, Rate limiting and throttling is implemented. This controls the flow of received requests and responsive systems.</li>
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<p><strong>Request\Response Transformation</strong></p>
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<li>Flexible and easy handling of data formats is required by the client diversity and Microservices. The facility of transformation of responses and requests is provided by API Gateway while ensuring the compatibility between the Clients and services.</li>
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<p><strong>Logging and Monitoring</strong></p>
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<li>The visibility of the performance and the use of the API’s at a large scale is very important for the purpose of maintaining the health of the system and optimization. Powerful monitoring and logging capabilities are offered by API Gateway.</li>
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<h2 class="wp-block-heading"><strong>Benefits of Using API Gateway</strong></h2>
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<p>As the complicated landscape of the microservices and the web application is taken a look at by the organizations, API Gateway adaption is served as a strategic move, it addresses the key challenges and provides various benefits along with providing the help in better systems efficiency.</p>
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<h3 class="wp-block-heading"><strong>Consolidation of Multiple Microservices</strong></h3>
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<p><strong>Streamlined Complexity</strong></p>
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<p>The main advantage of API Gateway is the process of making the multiple microservices. The services of a unified entry point are served by API Gateway, which helps in seamless orchestration of diverse services.</p>
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<h3 class="wp-block-heading"><strong>Optimized Resource Utilization</strong></h3>
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<p>By making the microservices using the API Gateway,<a href="https://www.torocloud.com/blog/optimizing-api-resource-utilization-with-rate-limiting-and-throttle-controls#:~:text=API%20resource%20utilization%20refers%20to,and%20a%20poor%20user%20experience."> optimized utilization of resources</a> along with the efficient storage distribution is ensured. This then helps in cost effectiveness.</p>
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<h3 class="wp-block-heading"><strong>Simplified Client-Side Interactions</strong></h3>
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<p><strong>Unified Clients Interface</strong></p>
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<p>Single points of entry for clients are provided, interaction processes are simplified. Navigation of multiple microservices is not required by any client. Streamlined communication and its flow is made possible by interacting with the API Gateway.</p>
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<p><strong>Reduced Client side Implementation Complexity:</strong></p>
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<p>With the API Gateway activated, implementation of client side becomes straighter forward. The response receiving and request making could easily be made from a centralized point.</p>
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<h3 class="wp-block-heading"><strong>Enhanced Security through Centralized Authentication and Authorization</strong></h3>
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<p><strong>Robust Security Infrastructure</strong></p>
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<p>API Gateway performs as the centralized authorization and authentication processes. The requests from external are authenticated rigorously, access is only gained by the authorized entities.</p>
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<p><strong>Uniform security policies</strong></p>
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<p>The enforcement of uniform security policies in API Gateway is ensured in all Micro Services. The consistency of the entire system enhances the posture of security.</p>
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<h3 class="wp-block-heading"><strong>Improved Performance with Caching and Optimization</strong></h3>
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<p><strong>Efficient caching Mechanism</strong></p>
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<p>Through efficient caching, API gateway contributes towards performance improvement. Request of micro services along with the reduced latency is ensured by requesting data at the level of gateway frequently.</p>
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<p><strong>Performance Optimization Strategies</strong></p>
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<p>Permission for implementing the Performance optimization strategies is provided by API Gateway which includes Transformation of Request\response. Streamlined data transfer is made sure by these strategies between the clients and services.</p>
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<h3 class="wp-block-heading"><strong>Scalability and Flexibility</strong></h3>
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<p><strong>Seamless Scalability</strong></p>
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<p>In an environment that is rapidly changing, the basic requirement is Scalability. Seamless scalability is facilitated by API Gateway by the distribution of incoming requests efficiently among the Microservices.</p>
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<p><strong>Adaptability to Changing Requirements</strong></p>
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<p>The available flexibility in the API Gateway forces businesses to adapt fatly to the changing environment. This can include making the Microservices or Scaling up during the period of high demand.</p>
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<h2 class="wp-block-heading"><strong>Choosing the Right API Gateway</strong></h2>
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<p>The selection of picking out the right gateway helps with the efficiency along with the security and scalability. Some best knowledge about the understanding of API gateway solutions are shared.</p>
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<h3 class="wp-block-heading"><strong>Overview of Popular API Gateway Solutions</strong></h3>
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<p><strong>Amazon API Gateway:</strong></p>
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<li>Provider: <a href="https://aws.amazon.com/api-gateway/">Amazon Web Services (AWS)</a></li>
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<li>Key features: Backend technologies support, security features and scalability.</li>
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<p><strong>Apigee:</strong></p>
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<li>Provider: <a href="https://cloud.google.com/apigee/?utm_source=google&amp;utm_medium=cpc&amp;utm_campaign=japac-PK-all-en-dr-SKWS-all-all-trial-DSA-dr-1605216&amp;utm_content=text-ad-none-none-DEV_c-CRE_651036421125-ADGP_Hybrid+%7C+SKWS+-+BRO+%7C+DSA+~+All+Webpages-KWID_39700075532963629-dsa-19959388920&amp;userloc_1011086-network_g&amp;utm_term=KW_&amp;gad_source=1&amp;gclid=EAIaIQobChMI28Tfp4jHhAMVZy4GAB1p3w4gEAAYASAAEgJak_D_BwE&amp;gclsrc=aw.ds">Google Cloud.</a></li>
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<li>Key Features: Analytics, Management of API, Policies of Security.</li>
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<p><strong>Kong:</strong></p>
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<li>Provider: <a href="http://v">Kong Inc.</a></li>
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<li>Key Features: Scalable, Low weight, API Gateway offering, balancing of Load and Scalable.</li>
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<p><strong>Azure API Management:</strong></p>
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<li>Provider: <a href="https://azure.microsoft.com/en-us/products/api-management/?ef_id=_k_EAIaIQobChMIkPzLxojHhAMV-LRoCR0-QwLdEAAYASAAEgJFWfD_BwE_k_&amp;OCID=AIDcmm8ge9eggm_SEM__k_EAIaIQobChMIkPzLxojHhAMV-LRoCR0-QwLdEAAYASAAEgJFWfD_BwE_k_&amp;gad_source=1&amp;gclid=EAIaIQobChMIkPzLxojHhAMV-LRoCR0-QwLdEAAYASAAEgJFWfD_BwE">Microsoft Azure</a>.</li>
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<li>Key Features: Lifecycle management of API, Features of Security, and Load Balancing.</li>
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<p><strong>NGINX API Gateway:</strong></p>
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<li>Provider: <a href="https://www.nginx.com/products/nginx/api-gateway/">F5 network</a>.</li>
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<li>Key Features: Gateways of API with High-performance, balancing Load, Features of Security.</li>
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<h3 class="wp-block-heading"><strong>Considerations for Selecting the Appropriate API Gateway</strong></h3>
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<p>A great evaluation of factors are included in the process of selecting the right API Gateway. This also helps in great insurance of capabilities. Key considerations include.</p>
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<p><strong>Compatibility with Existing Technology Stack:</strong></p>
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<li>Evaluation Criteria: Integration of Selected API Gateway with the technology existing, programming languages and frameworks.</li>
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<li>Impact: Minimized the efforts of development with smooth integration, less difficulties and greater performance.</li>
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<p><strong>Scalability and Performance:</strong></p>
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<li>Evaluation Criteria: Increased load accommodation along with the good overall performance by assessing the API Gateways.</li>
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<li>Impact: API Gateway with performance ensures rapid responsiveness even in the high demand.</li>
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<p><strong>Security Features:</strong></p>
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<li>Evaluation Criteria: Examination of features of security offered by gateways of API. This includes encryption, mechanism of authentication and common vulnerabilities protection.</li>
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<li>Impact: For the safety of integrity of organization and data, Security robust measures are very important.</li>
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<p><strong>Integration Capabilities:</strong></p>
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<li>Evaluation criteria: The integration of different technologies of backend should be checked with API Gateway.</li>
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<li>Impact: Seamless communication of API Gateway is ensured by Flexible integration.</li>
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<p><strong>Community and Support:</strong></p>
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<li>Evaluation Criteria: The activity of user community size and community is assessed, along with the API Gateway Vendor support.</li>
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<li>Impact: The vendor support along with the community towards troubleshooting and stability in the long term.</li>
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<p>A balance between the compatibility and technical capabilities is needed while choosing the right API Gateway. Assistance in the right decision making can be done by utilizing these factors.</p>
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<h2 class="wp-block-heading"><strong>Leveraging Amazon API Gateway for Multi-Tenant Architecture</strong></h2>
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<p>The exploration on how the harness of Amazon API Gateway to make a robust multi-tenant architecture is discussed in this section. The optimization of resource utilization and effectiveness of cost is optimized by this approach. The Amazon API Gateway capabilities are delved into this section.</p>
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<h3 class="wp-block-heading"><strong>Exploring the Capabilities of Amazon API Gateway</strong></h3>
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<p><strong>Creating and Publishing RESTful and WebSocket APIs</strong></p>
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    <li>RESTful APIs
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            <li>Scalability at a high rate is offered by the AAPI gateways of Amazon for the purpose of creation and publishing of RESTful API’s.</li>
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    <li>WebSocket API
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            <li>WebSocket APIs are supported by the Gateways API. The one directional and real-time communication is enabled by this between the server and the clients.</li>
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<p><strong>Support for Various Backend Technologies</strong></p>
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<ul>
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    <li>Flexibility in Backend Integration
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        <ul>
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            <li>In the selection of backend technologies, flexibility is provided by API Gateway. Integration with the functions of AWS Lambda is also included.</li>
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    </li>
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</ul>
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<p><strong>Handling Common API Management Tasks</strong></p>
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<ul>
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    <li>Caching, throttling, Security and monitoring
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        <ul>
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            <li>Common API management tasks are greatly handled by API Gateway which include caching, throttling, monitoring, and Security.</li>
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    </li>
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</ul>
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<h3 class="wp-block-heading"><strong>Key Features of API Gateway Used in the Architecture</strong></h3>
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<p><strong>Custom Domain Names Support</strong></p>
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    <li>Simplifying API Endpoints with User-friendly URLs
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            <li>The API gateway generated endpoints are not really user-friendly. User-friendly URLs are allowed by custom domain name support.</li>
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        </ul>
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    </li>
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    <li>White labelling Domain for Multiple Customers
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            <li>White labelling is supported by API gateways. One subdomain is allowed to each customer (e.g. customer1.example.com).</li>
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        </ul>
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    </li>
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</ul>
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<p><strong>API Request/Response Transformation</strong></p>
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<ul>
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    <li>Separating Path-specific Integration
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            <li>The specification of integration of Path-specific is allowed by API Gateway. Routing of backend endpoints is ensured when requested because of this.</li>
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        </ul>
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    </li>
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    <li>Customizing header for customer-specific business logic
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            <li>For the purpose of controlling the customer-specific business logic, header customization is very important. Fully qualified domain name (FQDN) in URL is required.</li>
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        </ul>
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    </li>
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</ul>
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<h2 class="wp-block-heading"><strong>Conclusion of Multi-Tenant Architecture</strong></h2>
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<p>Using API Gateways of Amazon in a multi-tenant architecture gives us a low cost and scalable to the organization for serving many customers. The efficient and flexible architecture is ensured because of the availability of WebSocket API and RESTful. A very crucial role is played by the Custom domain names along with the API request\response transformation plays a key vital role in providing the solution to unique needs of new customers.</p>
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<h2 class="wp-block-heading"><strong>Final Thoughts</strong></h2>
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<p>At the end, a very concentrated component in the microservices and web application is the adaption of API Gateway of Amazon. This helps with the good user experience along with scalability. Customer logic along with the efficiency is provided by the custom domain name and transforming of responses and requests.</p>
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<h2 class="wp-block-heading"><strong>Encouragement for the Future</strong></h2>
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<p>The journey ends with the uplifting of organizations for the innovative solutions provided by them. With the evolution in architectures based on cloud, a rigid position is held by the API Gateway in optimizing communication between services and clients. With the adoption of API Gateway, personal challenges or organization are not only reduced but the continuous evolution of cloud based systems invites everyone to stay innovative and responsive.</p>
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