# Activiti - Engine 5.22.0 API

Packages
Package | Description
--- | ---
org.activiti.engine | Public API of the Activiti engine. Typical usage of the API starts by the creation of a `ProcessEngineConfiguration` (typically based on a configuration file), from which a `ProcessEngine` can be obtained. Through the services obtained from such a `ProcessEngine`, BPM and workflow operation can be executed: `RepositoryService`: Manages `Deployment`s `RuntimeService`: For starting and searching `ProcessInstance`s `TaskService`: Exposes operations to manage human (standalone) `Task`s, such as claiming, completing and assigning tasks `IdentityService`: Used for managing `User`s, `Group`s and the relations between them `ManagementService`: Exposes engine admin and maintenance operations, which have no relation to the runtime exection of business processes `HistoryService`: Exposes information about ongoing and past process instances. `FormService`: Access to form data and rendered forms for starting new process instances and completing tasks.
org.activiti.engine.cfg |
org.activiti.engine.delegate | Interfaces used to include Java code in a process as the behavior of an activity or as a listener to process events with `JavaDelegate`s.
org.activiti.engine.delegate.event |
org.activiti.engine.delegate.event.impl |
org.activiti.engine.event |
org.activiti.engine.form | Classes related to the `FormService`.
org.activiti.engine.history | Classes related to the `HistoryService`.
org.activiti.engine.identity | classes related to the `IdentityService`.
org.activiti.engine.logging |
org.activiti.engine.management | Classes related to the `ManagementService`.
org.activiti.engine.parse |
org.activiti.engine.query | Classes related to the querying entities in the engine.
org.activiti.engine.repository | Classes related to the `RepositoryService`.
org.activiti.engine.runtime | Classes related to the `RuntimeService`.
org.activiti.engine.task | Classes related to the `TaskService`.
org.activiti.engine.test | Helper classes for testing processes.
org.activiti.engine.test.mock |

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