RESTHeart
Low code Microservices
and the Best Data APIs for MongoDB
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and the Best Data APIs for MongoDB
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RESTHeart API for MongoDB simplifies development and frees you to focus on delivering great user experiences
READ THE POSTRESTHeart Features
RESTHeart unlocks all the features of MongoDB via REST, GraphQL and WebSocket APIs.
Also supports Mongo Atlas, AWS DocumentDB, and Azure Cosmos DB
RESTHeart is available as a Docker image and tailored for the GraalVM to build lightweight native images with instant startup time, low memory footprint.
RESTHeart provides a powerful and battle-tested security layer that keeps your application secure without coding.
Service, Interceptor and Initializer are the simple yet powerful building blocks to develop microservices in Java, Kotlin, JavaScript or TypeScript.
Developers can focus on coding the microservice logic taking for granted the complex and costly tasks. The Framework ensures the effective management of the runtime process, security, concurrency, HTTP transport protocol, requests routing, logging, configuration and security.
The RESTHeart runtime solves the colored function problem: leveraging a scalable and pooled thread-per-request concurrency model, developers don't need to cope with complex asynchronous programming (and this applies too JavaScript as well)!
Read, write and search JSON documents with HTTP requests without coding; specify MongoDB queries and projection options; deal with large result sets with automatic pagination.
The GraphQL plugin works side by side with the REST plugin to get an unified API to build modern applications. GraphQL applications are configured through an API without coding.
The WebSocket API notifies clients of data changes in real time and supports thousands of connected clients. Data streams are configured through an API without coding.
The Data API
Query documents from the command line with httpie.
The GET request has two query parameters: filter to apply a query and pagesize to limit the response to one document.
Here we use the brilliant httpie, a modern command line HTTP client.
$ http -b GET https://demo.restheart.org/messages'?filter={"from":"Bob"}&pagesize=1'
[
{
"_id": {
"$oid": "5c50963e477870eb8258fa68"
},
"from": "Bob",
"message": "was here"
}
]Query documents from the command line with cURL.
The GET request has two query parameters: filter to apply a query (that needs to be encoded with --data-urlencode option since it contains the curly brackets) and pagesize to limit the response to one document.
Here we use the immortal cURL!
$ curl -G --data-urlencode 'filter={"from":"Bob"}' https://demo.restheart.org/messages?pagesize=1
[
{
"_id": {
"$oid": "5c50963e477870eb8258fa68"
},
"from": "Bob",
"message": "was here",
}
]Query documents with JavaScript.
The GET request has two query parameters: filter to apply a query and pagesize to limit the response to one document.
Here we use the fetch API.
const url = encodeURI('https://demo.restheart.org/messages?filter={"from":"Bob"}&pagesize=1');
fetch(url)
.then(response => response.json())
.then(json => JSON.stringify(json, null, 2))
.then(docs => console.log(docs));Query documents with Java.
The GET request has two query parameters: filter to apply a query and pagesize to limit the response to one document.
Here we use the unirest java http library.
public void printOutMessages() throws UnirestException {
var resp = Unirest.get("https://demo.restheart.org/messages")
.queryString("filter", "{'from':'Bob'}")
.queryString("pagesize", "1")
.asJson();
// print out each message
resp.getBody().getArray().forEach(msg -> System.out.println(msg.toString()));
}Query documents with Swift.
The GET request has two query parameters: filter to appy a query and pagesize to limit the response to one document.
Here we use the JSONSerialization to parse the response body.
import UIKit
import PlaygroundSupport
var urlComponents = URLComponents(string: "https://demo.restheart.org/messages")
// set the query parameters
var queryItems = [URLQueryItem]()
queryItems.append(URLQueryItem(name: "pagesize", value: "1"))
queryItems.append(URLQueryItem(name: "filter", value: "{\"from\":\"Bob\"}"))
urlComponents?.queryItems = queryItems
var urlRequest = URLRequest(url: (urlComponents?.url)!)
// set request method
urlRequest.httpMethod = "GET"
URLSession.shared.dataTask(with: urlRequest) { (data, response, error) in
guard let dataResponse = data, error == nil
else {
print(error?.localizedDescription ?? "Response Error")
return
}
do {
let jsonResponse = try JSONSerialization.jsonObject(with: dataResponse, options: [])
print(jsonResponse)
} catch let jsonError {
print(jsonError)
}
}.resume()
// only needed in playground
PlaygroundPage.current.needsIndefiniteExecution = trueExample Code
Implement web services in minutes.
Implement a simple interface and deploy the web service by copying its jar file into the plugins directory.
See it on GitHub More examples@RegisterPlugin(name = "greetings", description = "just another Hello World")
public class GreeterService implements JsonService {
@Override
public void handle(JsonRequest req, JsonResponse res) {
switch(req.getMethod()) {
case GET -> res.setContent(object().put("message", "Hello World!"));
case OPTIONS -> handleOptions(req);
default -> res.setStatusCode(HttpStatus.SC_METHOD_NOT_ALLOWED);
}
}
}Implement plugins in Kotlin.
You can use Java and Kotlin to implement plugins.
Kotlin Service example@RegisterPlugin(name = "kotlinGreeterService", description = "just another Hello World in Kotlin")
class GreeterService : JsonService {
override fun handle(req: JsonRequest, res: JsonResponse) {
when(req.method) {
METHOD.GET -> res.content = obj().put("msg", "Hello World").get()
METHOD.OPTIONS -> handleOptions(req);
else -> res.setStatusCode(HttpStatus.SC_METHOD_NOT_ALLOWED);
}
}
}Snoop and modify requests at different stages of their lifecycle.
This interceptor applies to requests of the hello web service adding a timestamp to the response content.
Interceptor can be executed at different points of the request as defined
by the interceptPoint parameter of the annotation RegisterPlugin
@RegisterPlugin(name = "helloInterceptor",
description = "add a timestamp to the response of /greetings",
interceptPoint = InterceptPoint.RESPONSE)
public class HelloInterceptor implements JsonInterceptor {
@Override
public void handle(JsonRequest req, JsonResponse res) {
res.getContent()
.getAsJsonObject()
.addProperty("timestamp", Instant.now().toString());
}
@Override
public boolean resolve(JsonRequest req, JsonResponse res) {
return req.isHandledBy("greetings");
}
}Implement plugins in JavaScript.
This is yet another Hello World web service.
Running RESTHeart on the GraalVM allows you to deploy JavaScript Services and Interceptors.
export const options = {
name: "helloWorldService",
description: "just another Hello World",
uri: "/hello"
}
export function handle(req, res) {
res.setContent(JSON.stringify({ msg: 'Hello World' }));
res.setContentTypeAsJson();
}Widely Adopted
RESTHeart Docker image's pulls
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