Hi @jayv25585659 ,
Integrating GraphQL with Headless AEM and external APIs like Mulesoft can be approached in multiple ways. Here’s a detailed guide on how you can achieve this:
Overview of the Approach
- Scheduled Job: Retrieve data from the Mulesoft API and store it in AEM as Content Fragments or nodes.
- GraphQL Queries: Use AEM’s GraphQL API to query the stored data.
- Frontend Integration: Fetch the data using GraphQL in your frontend application.
Steps to Implement
1. Scheduled Job to Fetch Data from Mulesoft
Create an OSGi service in AEM to run a scheduled job that fetches data from Mulesoft and stores it in AEM.
a. Add Dependencies: Ensure your pom.xml includes necessary dependencies for creating OSGi services and handling HTTP requests.
<dependency>
<groupId>org.apache.sling</groupId>
<artifactId>org.apache.sling.models.api</artifactId>
<version>1.3.8</version>
</dependency>
<dependency>
<groupId>org.apache.sling</groupId>
<artifactId>org.apache.sling.commons.scheduler</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.13</version>
</dependency>
b. Create the Scheduled Job:
package com.example.core.schedulers;
import org.apache.sling.commons.scheduler.ScheduleOptions;
import org.apache.sling.commons.scheduler.Scheduler;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
@Component(immediate = true, service = Runnable.class)
public class MulesoftDataSyncScheduler implements Runnable {
private static final Logger LOG = LoggerFactory.getLogger(MulesoftDataSyncScheduler.class);
@Reference
private Scheduler scheduler;
@Activate
protected void activate() {
ScheduleOptions options = scheduler.EXPR("0 0 * * * ?"); // every hour
scheduler.schedule(this, options);
}
@Override
public void run() {
LOG.info("Running scheduled job to fetch data from Mulesoft");
// Fetch data from Mulesoft
try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
HttpGet request = new HttpGet("https://mulesoft-api-endpoint");
HttpResponse response = httpClient.execute(request);
String jsonResponse = EntityUtils.toString(response.getEntity());
// Process and store the data in AEM
storeDataInAEM(jsonResponse);
} catch (IOException e) {
LOG.error("Error fetching data from Mulesoft", e);
}
}
private void storeDataInAEM(String jsonResponse) {
// Implement logic to create/update Content Fragments or nodes in AEM
// based on the fetched data
}
}
2. Store Data in AEM
The storeDataInAEM method should parse the JSON response and create or update Content Fragments or nodes in AEM. Here's a basic example of how to create a node:
private void storeDataInAEM(String jsonResponse) {
try (ResourceResolver resolver = resourceResolverFactory.getServiceResourceResolver(Map.of("service.user", "data-sync-service"))) {
Session session = resolver.adaptTo(Session.class);
Node rootNode = session.getNode("/content/data");
// Parse the JSON response and iterate over the data
JsonArray jsonArray = JsonParser.parseString(jsonResponse).getAsJsonArray();
for (JsonElement element : jsonArray) {
JsonObject jsonObject = element.getAsJsonObject();
String nodeName = jsonObject.get("id").getAsString();
Node dataNode = rootNode.hasNode(nodeName) ? rootNode.getNode(nodeName) : rootNode.addNode(nodeName);
dataNode.setProperty("title", jsonObject.get("title").getAsString());
dataNode.setProperty("description", jsonObject.get("description").getAsString());
// Set other properties as needed
}
session.save();
} catch (Exception e) {
LOG.error("Error storing data in AEM", e);
}
}
3. Query Data Using GraphQL
With the data stored in AEM as Content Fragments or nodes, you can leverage AEM’s GraphQL API to query the data.
a. Enable GraphQL: Ensure GraphQL is enabled in your AEM instance. You can enable GraphQL in the AEM Web Console.
b. Define GraphQL Schema: Create a schema for your Content Fragments or nodes.
c. Query the Data: Use the GraphQL API to query your data. Here’s an example query:
query {
productList {
items {
title
description
}
}
}
4. Frontend Integration
In your frontend application, use a GraphQL client (e.g., Apollo Client) to fetch the data from AEM’s GraphQL endpoint.
a. Install Apollo Client:
npm install @apollo/client graphql
b. Fetch Data:
import { ApolloClient, InMemoryCache, gql } from '@apollo/client';
const client = new ApolloClient({
uri: 'https://your-aem-instance/graphql/endpoint',
cache: new InMemoryCache()
});
client.query({
query: gql`
query {
productList {
items {
title
description
}
}
}
`
}).then(result => console.log(result));
- Scheduled Job: Create a scheduled job in AEM to fetch data from Mulesoft and store it in AEM.
- Store Data: Parse the API response and store it in AEM as Content Fragments or nodes.
- GraphQL Query: Use AEM’s GraphQL API to query the stored data.
- Frontend Integration: Fetch the data using a GraphQL client in your frontend application.
This approach ensures that your data remains in sync with the external API while leveraging AEM’s headless capabilities for efficient content delivery.
