How do I use other connectors in CAMUNDA 7?

 

How to Use Connectors in Camunda 7 (HTTP, SOAP, and Other Integrations)

Introduction

When designing workflows using Camunda, processes often need to interact with external systems such as:

• REST APIs

• SOAP services

• messaging platforms

• databases

Instead of writing custom Java code every time, Camunda provides connectors, which are reusable components that allow BPMN processes to communicate with external systems.

Connectors simplify integration and help orchestrate business processes across different systems.

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What Are Camunda Connectors?

A Camunda connector is a component that connects your BPMN workflow to a third-party system via an API.

Examples include:

• HTTP connector

• SOAP connector

• email connector

• database connectors

These connectors allow workflows to send requests or receive data from external services without complex coding.

Camunda connectors can be used in Service Tasks to execute external operations.

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Common Connectors in Camunda 7

Some commonly used connectors include:

Connector	Purpose
HTTP Connector	Call REST APIs
SOAP Connector	Call SOAP web services
Email Connector	Send or receive email
Database Connector	Query or update database
Messaging Connector	Send messages to queues

Camunda’s connector framework allows developers to create and register their own connectors as well.

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Step 1: Add Connector Dependencies

To use connectors in Camunda 7, you must include the required libraries.

Example Maven dependencies:

<dependency>
  <groupId>org.camunda.bpm</groupId>
  <artifactId>camunda-engine-plugin-connect</artifactId>
</dependency>

<dependency>
  <groupId>org.camunda.connect</groupId>
  <artifactId>camunda-connect-core</artifactId>
</dependency>

These libraries enable the Camunda Connect framework.

Some distributions may require adding connector JAR files manually.

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Step 2: Configure a Connector in BPMN

In Camunda Modeler, configure a Service Task.

Steps:

1️⃣ Add a Service Task
2️⃣ Set Implementation = Connector
3️⃣ Select the connector type (HTTP, SOAP, etc.)

You can then configure properties such as:

• URL

• HTTP method

• headers

• request body

For example:

Method = GET
URL = https://api.example.com/customer

The connector will execute when the process reaches that service task.

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Step 3: Example – HTTP Connector

Example BPMN flow:

Start Event
   |
Service Task (HTTP Connector)
   |
End Event

Connector configuration:

Method: GET
URL: https://api.example.com/orders

The workflow sends the HTTP request and continues with the response.

The HTTP connector internally uses an HTTP client to execute requests.

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Step 4: Use the Connector Response

You can store API responses as process variables.

Example:

${response}

This variable can then be used in:

• gateways

• scripts

• subsequent service tasks

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Step 5: Creating Custom Connectors

Sometimes the built-in connectors are not enough.

Camunda allows developers to create custom connectors.

Steps:

1️⃣ Implement the Connector interface
2️⃣ Register the connector in the engine
3️⃣ Use it in BPMN

This allows integration with:

• proprietary systems

• legacy applications

• custom APIs

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Connectors vs External Tasks

Developers sometimes confuse connectors with external tasks.

Feature	Connector	External Task
Execution	Inside Camunda engine	External worker
Implementation	BPMN configuration	Worker service
Languages	Mainly Java	Any language
Architecture	Monolithic integration	Microservices

Many modern systems prefer External Tasks for better scalability.

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Best Practices When Using Connectors

✔ Keep connectors lightweight
✔ Handle API errors properly
✔ Store responses in process variables
✔ Avoid long-running HTTP calls
✔ Use asynchronous execution when needed

These practices help ensure stable workflow automation in production systems.

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Recommended Articles

If you are learning Camunda workflow automation, you may also like the following articles from this blog:

👉 https://shikhanirankari.blogspot.com/

Recommended posts:

• Execution Stuck on the Parallel Gateway

• Camunda Service Task vs External Task

• BPMN Modeling Mistakes That Break Production

• Camunda Job Executor Explained

• Workflow Automation with Camunda

These articles explain practical BPMN and Camunda topics for Java developers and workflow architects.

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Conclusion

Camunda connectors provide a powerful way to integrate BPMN workflows with external systems.

By using connectors such as HTTP and SOAP, developers can easily orchestrate services without writing complex integration code.

For modern architectures, connectors combined with external tasks and microservices can build scalable workflow automation platforms.

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Si vous rencontrez des problèmes sur des projets réels liés au développement backend d’entreprise ou à l’automatisation des workflows, je propose des services de conseil payants, de débogage en production, de support projet et de formations ciblées.

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