# Package org.kie.api.runtime.process

package org.kie.api.runtime.process
The process runtime classes.

- Related Packages
  Package
  Description
  org.kie.api.runtime
  The runtime engine classes, including KieSession and StatelessKieSession.
  org.kie.api.runtime.conf
  org.kie.api.runtime.rule
  The rule runtime classes.
- Class
  Description
  DataTransformer
  Data transformation capabilities used by data input and data output transformation as part of BPMN2 process definition.
  EventListener
  An interface that represents an element that is listening for specific types of events.
  NodeInstance
  A node instance represents the execution of one specific node in a process instance.
  NodeInstanceContainer
  A node instance container is a container that can contain (zero or more) node instances.
  ProcessContext
  Represents the context when executing a process.
  ProcessInstance
  A process instance represents one specific instance of a process that is currently executing.
  ProcessRuntime
  The `ProcessRuntime` is a super-interface for all `KieSession`s.
  ProcessWorkItemHandlerException
  ProcessWorkItemHandlerException.HandlingStrategy
  StatefulProcessSession
  There are currently no process related methods that are used with the external KieSession class.
  StatelessProcessSession
  There are currently no process related methods that are used with the external StatelessKieSession class.
  WorkflowProcessInstance
  A workflow process instance represents one specific instance of a workflow process that is currently executing.
  WorkItem
  Represents one unit of work that needs to be executed.
  WorkItemHandler
  A work item handler is responsible for executing work items of a specific type.
  WorkItemManager
  A work item manager is responsible for finding the right work item handler when a work item should be executed and should be notified when this work item has been completed (or aborted).