Activiti Workflow Engine Database Design

Activiti is a workflow and Business Process Model and Notation (BPMN) engine that provides a comprehensive solution for workflow management. This article covers the basics of Activiti, including its components, database design, and usage examples.

Activiti Components: Activiti consists of several key components: Process Engine, Repository Service, Runtime Service, Task Service, and History Service.

Database Design: Activiti uses a relational database to store process definitions, runtime data, and historical records. The database schema includes tables for process definitions, runtime data, and history.

Basic Usage: To use Activiti, first deploy the BPMN process diagram using the Repository Service. Then, start a process instance using the Runtime Service. Tasks can be created and completed using the Task Service. The History Service allows querying historical data.

ProcessEngine engine = ProcessEngines.getDefaultProcessEngine(); RepositoryService repositoryService = engine.getRepositoryService(); repositoryService.createDeployment().addClasspathResource("processes/apply.bpmn").deploy(); ProcessInstance instance = runtimeService.startProcessInstanceByKey("apply_processor_1", variableMap); Task firstTask = taskService.createTaskQuery().taskAssignee("zhang3").singleResult(); taskService.complete(firstTask.getId(), Maps.newHashMap("day", 4));