Undeploying Processes in Spring Boot Camunda: A Step-by-Step Guide

In this blog post, we will discuss how to undeploy all processes when starting up a Spring Boot Camunda application. We will utilize the following code snippet:

@PostConstruct
public void undeployAll() {
    RepositoryService repositoryService = processEngine.getRepositoryService();
    List<Deployment> deployments = repositoryService.createDeploymentQuery().list();

    for (Deployment deployment : deployments) {
        repositoryService.deleteDeployment(deployment.getId(), true);
    }
}

Introduction

When working with a Spring Boot Camunda application, there might be instances where you need to undeploy all existing processes during application startup. This could be necessary when you want to ensure a clean slate or update the deployed processes. In this blog post, we will explore a simple approach to achieve this using the provided code snippet.

Step-by-Step Guide

Step 1: Include Camunda Dependencies

Make sure your Spring Boot project includes the necessary Camunda dependencies. This can be done by adding the following dependency to your project's pom.xml file:

<dependency>
    <groupId>org.camunda.bpm.springboot</groupId>
    <artifactId>camunda-bpm-spring-boot-starter</artifactId>
</dependency>

Step 2: Define the undeployAll() Method

In your Spring Boot application, create a class (e.g., ProcessUndeployer) and add the following code inside it:

@PostConstruct
public void undeployAll() {
    RepositoryService repositoryService = processEngine.getRepositoryService();
    List<Deployment> deployments = repositoryService.createDeploymentQuery().list();

    for (Deployment deployment : deployments) {
        repositoryService.deleteDeployment(deployment.getId(), true);
    }
}

The @PostConstruct annotation ensures that the undeployAll() method is executed after the bean initialization.

Step 3: Test the Application

Run your Spring Boot Camunda application and observe the console output. You should see log messages indicating the successful undeployment of all processes.

In this blog post, we have learned how to undeploy all processes when starting up a Spring Boot Camunda application. The provided code snippet demonstrates a simple and effective approach to achieve this. By executing the undeployAll() method during the application startup, we can ensure a clean state and update the deployed processes if needed.