How to configure camunda mail connector in java

Camunda provides a mail connector that allows you to send and receive emails as part of your business process. Here's a step-by-step guide on how to configure the Camunda mail connector in Java:

Prerequisites

• You have Camunda installed and running in your environment.
• You have a Java project set up with the Camunda Java API dependencies.

Step 1: Create a Mail Connector Configuration

Create a Java class that extends org.camunda.bpm.engine.impl.connector.MailConnector and override the configure() method. In this method, you'll configure the mail connector with your email settings.

Here's an example:

import org.camunda.bpm.engine.impl.connector.MailConnector;
import org.camunda.bpm.engine.impl.connector.MailConnectorConfiguration;
import org.camunda.bpm.engine.impl.connector.MailConnectorConfigurationBuilder;

public class MyMailConnector extends MailConnector {
    @Override
    protected void configure(MailConnectorConfigurationBuilder builder) {
        builder
           .setHost("smtp.gmail.com")
           .setPort(587)
           .setUsername("your-email-username")
           .setPassword("your-email-password")
           .setFromAddress("your-email-from-address")
           .setDebugMode(true);
    }
}

Step 2: Register the Mail Connector

Register the mail connector with the Camunda engine using the registerConnector() method. You can do this in your application's main() method or in a Spring Boot application's @Configuration class.

Here's an example:

import org.camunda.bpm.engine.ProcessEngine;
import org.camunda.bpm.engine.ProcessEngineConfiguration;
import org.camunda.bpm.engine.impl.connector.MailConnector;

public class MyApplication {
    public static void main(String[] args) {
        // Create a process engine configuration
        ProcessEngineConfiguration config = ProcessEngineConfiguration.createStandaloneInMemProcessEngineConfiguration();
        config.setMailConnector(new MyMailConnector());
        ProcessEngine engine = config.buildProcessEngine();

        // Start the process engine
        engine.start();
    }
}

Step 3: Use the Mail Connector in Your Process

Once the mail connector is registered, you can use it in your process by injecting it into your process service task.

Here's an example:

import org.camunda.bpm.engine.ProcessEngine;
import org.camunda.bpm.engine.delegate.DelegateExecution;
import org.camunda.bpm.engine.delegate.JavaDelegate;
import org.camunda.bpm.engine.impl.connector.MailConnector;

public class MyProcessService implements JavaDelegate {
    @Override
    public void execute(DelegateExecution execution) {
        MailConnector mailConnector = (MailConnector) execution.getProcessEngineServices().getMailConnector();
        mailConnector.sendMail("subject", "body", "[email protected]");
    }
}

That's it! With these steps, you should now have a Camunda mail connector configured and ready to use in your Java application.