HTTP Client

The http-client project is a HTTP client abstraction that simplifies making HTTP requests using different clients like RestTemplate, WebClient, and OpenFeignClient. It supports various features such as asynchronous calls, rate limiting, and timeout management.

Features

• Multiple HTTP Clients: Supports RestTemplate, WebClient, and OpenFeignClient.
• Asynchronous and Synchronous Calls: Make requests either asynchronously or synchronously based on configuration.
• Rate Limiting: Control the frequency of API calls per URL.
• Timeout Management: Set timeouts to ensure requests do not hang indefinitely.
• Parallel API Calls: Execute multiple API calls in parallel.

Getting Started

Prerequisites

• Java 11 or higher
• Maven

Installation

1. Clone the repository:

   git clone https://github.com/cristigirbovan/http-client.git

2. Navigate to the project directory:

   cd http-client

3. Build the project using Maven:

   mvn clean install

Configuration

The project can be configured using the following main classes:

• ExternalApiService: Main service for making API calls.
• ApiCallConfig: Configuration holder for API call parameters.

Usage

Making a Single API Request

You can make a single API request using the makeRequest method from ExternalApiService.

@Autowired
private ExternalApiService externalApiService;

@GetMapping("/getPostRT")
public Object getPostRT(@RequestParam String postId) throws Throwable {
	String url = "https://jsonplaceholder.typicode.com/posts/" + postId;
    return externalApiService.makeRequest(url, "RestTemplate", "GET", true, 5000, 5, null, Object.class);
}

@GetMapping("/getPostWC")
public Object getPostWC(@RequestParam String postId) throws Throwable {
	String url = "https://jsonplaceholder.typicode.com/posts/" + postId;
	return externalApiService.makeRequest(url, "WebClient", "GET", false, 5000, 5, null, Object.class);
}

@GetMapping("/getPostOF")
public Object getPostOF(@RequestParam String postId) throws Throwable {
	String url = "https://jsonplaceholder.typicode.com/posts/" + postId;
	return externalApiService.makeRequest(url, "OpenFeign", "GET", false, 5000, 5, null, Object.class);
}

@PostMapping("/createPostRT")
public Object createPostRT(@RequestBody Map<String, Object> requestBody) throws Throwable {
	String url = "https://jsonplaceholder.typicode.com/posts";
	return externalApiService.makeRequest(url, "RestTemplate", "POST", false, 5000, 5, requestBody, Object.class);
}

@PostMapping("/createPostWC")
public Object createPostWC(@RequestBody Map<String, Object> requestBody) throws Throwable {
	String url = "https://jsonplaceholder.typicode.com/posts";
	return externalApiService.makeRequest(url, "WebClient", "POST", true, 5000, 5, requestBody, Object.class);
}

@PostMapping("/createPostOF")
public Object createPostOF(@RequestBody Map<String, Object> requestBody) throws Throwable {
	String url = "https://jsonplaceholder.typicode.com/posts";
	return externalApiService.makeRequest(url, "OpenFeign", "POST", true, 5000, 5, requestBody, Object.class);
}

You can make parallel API calls using the callApisInParallel method from ExternalApiService.

@Autowired
private ExternalApiService externalApiService;

@GetMapping("/makeParallelApiCalls")
public List<Object> makeParallelApiCalls() {
    List<ApiCallConfig> configs = Arrays.asList(
                new ApiCallConfig("https://jsonplaceholder.typicode.com/posts/1", "RestTemplate", HttpMethod.GET, false, 5000, 10, null, Object.class)
                ,new ApiCallConfig("https://jsonplaceholder.typicode.com/posts/2", "OpenFeign", HttpMethod.GET, true, 5000, 10, null, Object.class)
                ,new ApiCallConfig("https://jsonplaceholder.typicode.com/posts/3", "WebClient", HttpMethod.GET, false, 5000, 10, null, Object.class)
                ,new ApiCallConfig("https://jsonplaceholder.typicode.com/posts/4", "OpenFeign", HttpMethod.GET, false, 5000, 10, null, Object.class)
                ,new ApiCallConfig("https://jsonplaceholder.typicode.com/posts/5", "OpenFeign", HttpMethod.GET, false, 5000, 10, null, Object.class)
                ,new ApiCallConfig("https://jsonplaceholder.typicode.com/posts/6", "WebClient", HttpMethod.GET, true, 5000, 10, null, Object.class)
                ,new ApiCallConfig("https://jsonplaceholder.typicode.com/posts/7", "RestTemplate", HttpMethod.GET, false, 5000, 10, null, Object.class)
        );
    return externalApiService.callApisInParallel(configs);
}