## Uses of Class
org.activiti.engine.ActivitiException

- Packages that use ActivitiException
  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.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.

- - ### Uses of ActivitiException in org.activiti.engine

    Subclasses of ActivitiException in org.activiti.engine
    Modifier and Type | Class and Description
    --- | ---
    `class` | `ActivitiClassLoadingException` Runtime exception indicating the requested class was not found or an error occurred while loading the class.
    `class` | `ActivitiIllegalArgumentException` An exception indicating that an illegal argument has been supplied in an Activiti API-call, an illegal value was configured in the engine's configuration or an illegal value has been supplied or an illegal value is used in a process-definition.
    `class` | `ActivitiObjectNotFoundException` An exception indicating that the object that is required or actioned on does not exist.
    `class` | `ActivitiOptimisticLockingException` Exception that is thrown when an optimistic locking occurs in the datastore caused by concurrent access of the same data entry.
    `class` | `ActivitiTaskAlreadyClaimedException` This exception is thrown when you try to claim a task that is already claimed by someone else.
    `class` | `ActivitiWrongDbException` Exception that is thrown when the Activiti engine discovers a mismatch between the database schema version and the engine version.
    `class` | `JobNotFoundException` This exception is thrown when you try to execute a job that is not found (may be due to cancelActiviti="true" for instance)..

  - ### Uses of ActivitiException in org.activiti.engine.delegate

    Subclasses of ActivitiException in org.activiti.engine.delegate
    Modifier and Type | Class and Description
    --- | ---
    `class` | `BpmnError` Special exception that can be used to throw a BPMN Error from `JavaDelegate`s and expressions.

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