TaskService (Activiti - Engine 6.0.0 API)

```
public interface TaskService
```
Service which provides access to Task and form related operations.

Author:

Tom Baeyens, Joram Barrez

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addCandidateGroup(String taskId, String groupId)` Convenience shorthand for `addGroupIdentityLink(String, String, String)`; with type `IdentityLinkType.CANDIDATE`
`void`	`addCandidateUser(String taskId, String userId)` Convenience shorthand for `addUserIdentityLink(String, String, String)`; with type `IdentityLinkType.CANDIDATE`
`Comment`	`addComment(String taskId, String processInstanceId, String message)` Add a comment to a task and/or process instance.
`Comment`	`addComment(String taskId, String processInstanceId, String type, String message)` Add a comment to a task and/or process instance with a custom type.
`void`	`addGroupIdentityLink(String taskId, String groupId, String identityLinkType)` Involves a group with a task.
`void`	`addUserIdentityLink(String taskId, String userId, String identityLinkType)` Involves a user with a task.
`void`	`claim(String taskId, String userId)` Claim responsibility for a task: the given user is made assignee for the task.
`void`	`complete(String taskId)` Called when the task is successfully executed.
`void`	`complete(String taskId, Map<String,Object> variables)` Called when the task is successfully executed, and the required task parameters are given by the end-user.
`void`	`complete(String taskId, Map<String,Object> variables, boolean localScope)` Called when the task is successfully executed, and the required task parameters are given by the end-user.
`void`	`complete(String taskId, Map<String,Object> variables, Map<String,Object> transientVariables)` Similar to `complete(String, Map)`, but allows to set transient variables too.
`Attachment`	`createAttachment(String attachmentType, String taskId, String processInstanceId, String attachmentName, String attachmentDescription, InputStream content)` Add a new attachment to a task and/or a process instance and use an input stream to provide the content
`Attachment`	`createAttachment(String attachmentType, String taskId, String processInstanceId, String attachmentName, String attachmentDescription, String url)` Add a new attachment to a task and/or a process instance and use an url as the content
`NativeTaskQuery`	`createNativeTaskQuery()` Returns a new `NativeQuery` for tasks.
`TaskQuery`	`createTaskQuery()` Returns a new `TaskQuery` that can be used to dynamically query tasks.
`void`	`delegateTask(String taskId, String userId)` Delegates the task to another user.
`void`	`deleteAttachment(String attachmentId)` Delete an attachment
`void`	`deleteCandidateGroup(String taskId, String groupId)` Convenience shorthand for `deleteGroupIdentityLink(String, String, String)`; with type `IdentityLinkType.CANDIDATE`
`void`	`deleteCandidateUser(String taskId, String userId)` Convenience shorthand for `deleteUserIdentityLink(String, String, String)`; with type `IdentityLinkType.CANDIDATE`
`void`	`deleteComment(String commentId)` Removes an individual comment with the given id.
`void`	`deleteComments(String taskId, String processInstanceId)` Removes all comments from the provided task and/or process instance
`void`	`deleteGroupIdentityLink(String taskId, String groupId, String identityLinkType)` Removes the association between a group and a task for the given identityLinkType.
`void`	`deleteTask(String taskId)` Deletes the given task, not deleting historic information that is related to this task.
`void`	`deleteTask(String taskId, boolean cascade)` Deletes the given task.
`void`	`deleteTask(String taskId, String deleteReason)` Deletes the given task, not deleting historic information that is related to this task..
`void`	`deleteTasks(Collection<String> taskIds)` Deletes all tasks of the given collection, not deleting historic information that is related to these tasks.
`void`	`deleteTasks(Collection<String> taskIds, boolean cascade)` Deletes all tasks of the given collection.
`void`	`deleteTasks(Collection<String> taskIds, String deleteReason)` Deletes all tasks of the given collection, not deleting historic information that is related to these tasks.
`void`	`deleteUserIdentityLink(String taskId, String userId, String identityLinkType)` Removes the association between a user and a task for the given identityLinkType.
`Attachment`	`getAttachment(String attachmentId)` Retrieve a particular attachment
`InputStream`	`getAttachmentContent(String attachmentId)` Retrieve stream content of a particular attachment
`Comment`	`getComment(String commentId)` Returns an individual comment with the given id.
`List<Comment>`	`getCommentsByType(String type)` All comments of a given type.
`DataObject`	`getDataObject(String taskId, String dataObject)` The DataObject.
`DataObject`	`getDataObject(String taskId, String dataObjectName, String locale, boolean withLocalizationFallback)` The DataObject.
`Map<String,DataObject>`	`getDataObjects(String taskId)` All DataObjects visible from the given execution scope (including parent scopes).
`Map<String,DataObject>`	`getDataObjects(String taskId, Collection<String> dataObjectNames)` The DataObjects for all given dataObjectNames, takes all dataObjects into account which are visible from the given task scope (including parent scopes).
`Map<String,DataObject>`	`getDataObjects(String taskId, Collection<String> dataObjectNames, String locale, boolean withLocalizationFallback)` The DataObjects for all given dataObjectNames, takes all dataObjects into account which are visible from the given task scope (including parent scopes).
`Map<String,DataObject>`	`getDataObjects(String taskId, String locale, boolean withLocalizationFallback)` All DataObjects visible from the given task scope (including parent scopes).
`Event`	`getEvent(String eventId)` Returns an individual event with the given id.
`List<IdentityLink>`	`getIdentityLinksForTask(String taskId)` Retrieves the `IdentityLink`s associated with the given task.
`List<Attachment>`	`getProcessInstanceAttachments(String processInstanceId)` The list of attachments associated to a process instance
`List<Comment>`	`getProcessInstanceComments(String processInstanceId)` The comments related to the given process instance.
`List<Comment>`	`getProcessInstanceComments(String processInstanceId, String type)` The comments related to the given process instance.
`List<Task>`	`getSubTasks(String parentTaskId)` The list of subtasks for this parent task
`List<Attachment>`	`getTaskAttachments(String taskId)` The list of attachments associated to a task
`List<Comment>`	`getTaskComments(String taskId)` The comments related to the given task.
`List<Comment>`	`getTaskComments(String taskId, String type)` The comments related to the given task of the given type.
`List<Event>`	`getTaskEvents(String taskId)` The all events related to the given task.
`Object`	`getVariable(String taskId, String variableName)` get a variables and search in the task scope and if available also the execution scopes.
`<T> T`	`getVariable(String taskId, String variableName, Class<T> variableClass)` get a variables and search in the task scope and if available also the execution scopes.
`org.activiti.engine.impl.persistence.entity.VariableInstance`	`getVariableInstance(String taskId, String variableName)` The variable.
`org.activiti.engine.impl.persistence.entity.VariableInstance`	`getVariableInstanceLocal(String taskId, String variableName)` The variable for a task.
`Map<String,org.activiti.engine.impl.persistence.entity.VariableInstance>`	`getVariableInstances(String taskId)` All variables visible from the given task scope (including parent scopes).
`Map<String,org.activiti.engine.impl.persistence.entity.VariableInstance>`	`getVariableInstances(String taskId, Collection<String> variableNames)` The variable values for all given variableNames, takes all variables into account which are visible from the given task scope (including parent scopes).
`Map<String,org.activiti.engine.impl.persistence.entity.VariableInstance>`	`getVariableInstancesLocal(String taskId)` All variable values that are defined in the task scope, without taking outer scopes into account.
`Map<String,org.activiti.engine.impl.persistence.entity.VariableInstance>`	`getVariableInstancesLocal(String taskId, Collection<String> variableNames)` The variable values for all given variableNames that are defined in the given task's scope.
`List<org.activiti.engine.impl.persistence.entity.VariableInstance>`	`getVariableInstancesLocalByTaskIds(Set<String> taskIds)` get all variables and search only in the task scope.
`Object`	`getVariableLocal(String taskId, String variableName)` checks whether or not the task has a variable defined with the given name.
`<T> T`	`getVariableLocal(String taskId, String variableName, Class<T> variableClass)` checks whether or not the task has a variable defined with the given name.
`Map<String,Object>`	`getVariables(String taskId)` get all variables and search in the task scope and if available also the execution scopes.
`Map<String,Object>`	`getVariables(String taskId, Collection<String> variableNames)` get values for all given variableNames and search only in the task scope.
`Map<String,Object>`	`getVariablesLocal(String taskId)` get all variables and search only in the task scope.
`Map<String,Object>`	`getVariablesLocal(String taskId, Collection<String> variableNames)` get a variable on a task
`boolean`	`hasVariable(String taskId, String variableName)` checks whether or not the task has a variable defined with the given name, in the task scope and if available also the execution scopes.
`boolean`	`hasVariableLocal(String taskId, String variableName)` checks whether or not the task has a variable defined with the given name, local task scope only.
`Task`	`newTask()` Creates a new task that is not related to any process instance.
`Task`	`newTask(String taskId)` create a new task with a user defined task id
`void`	`removeVariable(String taskId, String variableName)` Removes the variable from the task.
`void`	`removeVariableLocal(String taskId, String variableName)` Removes the variable from the task (not considering parent scopes).
`void`	`removeVariables(String taskId, Collection<String> variableNames)` Removes all variables in the given collection from the task.
`void`	`removeVariablesLocal(String taskId, Collection<String> variableNames)` Removes all variables in the given collection from the task (not considering parent scopes).
`void`	`resolveTask(String taskId)` Marks that the assignee is done with this task and that it can be send back to the owner.
`void`	`resolveTask(String taskId, Map<String,Object> variables)` Marks that the assignee is done with this task providing the required variables and that it can be sent back to the owner.
`void`	`resolveTask(String taskId, Map<String,Object> variables, Map<String,Object> transientVariables)` Similar to `resolveTask(String, Map)`, but allows to set transient variables too.
`void`	`saveAttachment(Attachment attachment)` Update the name and description of an attachment
`void`	`saveTask(Task task)` Saves the given task to the persistent data store.
`void`	`setAssignee(String taskId, String userId)` Changes the assignee of the given task to the given userId.
`void`	`setDueDate(String taskId, Date dueDate)` Changes the due date of the task
`void`	`setOwner(String taskId, String userId)` Transfers ownership of this task to another user.
`void`	`setPriority(String taskId, int priority)` Changes the priority of the task.
`void`	`setVariable(String taskId, String variableName, Object value)` set variable on a task.
`void`	`setVariableLocal(String taskId, String variableName, Object value)` set variable on a task.
`void`	`setVariables(String taskId, Map<String,? extends Object> variables)` set variables on a task.
`void`	`setVariablesLocal(String taskId, Map<String,? extends Object> variables)` set variables on a task.
`void`	`unclaim(String taskId)` A shortcut to `claim(java.lang.String, java.lang.String)` with null user in order to unclaim the task

- Method Detail
  - newTask
```
Task newTask()
```
    Creates a new task that is not related to any process instance. The returned task is transient and must be saved with saveTask(Task) 'manually'.
  - newTask
```
Task newTask(String taskId)
```
    create a new task with a user defined task id
  - saveTask
```
void saveTask(Task task)
```
    Saves the given task to the persistent data store. If the task is already present in the persistent store, it is updated. After a new task has been saved, the task instance passed into this method is updated with the id of the newly created task.
    
    Parameters:
    task - the task, cannot be null.
  - deleteTask
```
void deleteTask(String taskId)
```
    Deletes the given task, not deleting historic information that is related to this task.
    
    Parameters:
    taskId - The id of the task that will be deleted, cannot be null. If no task exists with the given taskId, the operation is ignored.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task with given id does not exist.
    
    ActivitiException - when an error occurs while deleting the task or in case the task is part of a running process.
  - deleteTasks
```
void deleteTasks(Collection<String> taskIds)
```
    Deletes all tasks of the given collection, not deleting historic information that is related to these tasks.
    
    Parameters:
    taskIds - The id's of the tasks that will be deleted, cannot be null. All id's in the list that don't have an existing task will be ignored.
    
    Throws:
    
    ActivitiObjectNotFoundException - when one of the task does not exist.
    
    ActivitiException - when an error occurs while deleting the tasks or in case one of the tasks is part of a running process.
  - deleteTask
```
void deleteTask(String taskId,
              boolean cascade)
```
    Deletes the given task.
    
    Parameters:
    taskId - The id of the task that will be deleted, cannot be null. If no task exists with the given taskId, the operation is ignored.
    cascade - If cascade is true, also the historic information related to this task is deleted.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task with given id does not exist.
    
    ActivitiException - when an error occurs while deleting the task or in case the task is part of a running process.
  - deleteTasks
```
void deleteTasks(Collection<String> taskIds,
               boolean cascade)
```
    Deletes all tasks of the given collection.
    
    Parameters:
    taskIds - The id's of the tasks that will be deleted, cannot be null. All id's in the list that don't have an existing task will be ignored.
    cascade - If cascade is true, also the historic information related to this task is deleted.
    
    Throws:
    
    ActivitiObjectNotFoundException - when one of the tasks does not exist.
    
    ActivitiException - when an error occurs while deleting the tasks or in case one of the tasks is part of a running process.
  - deleteTask
```
void deleteTask(String taskId,
              String deleteReason)
```
    Deletes the given task, not deleting historic information that is related to this task..
    
    Parameters:
    taskId - The id of the task that will be deleted, cannot be null. If no task exists with the given taskId, the operation is ignored.
    deleteReason - reason the task is deleted. Is recorded in history, if enabled.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task with given id does not exist.
    
    ActivitiException - when an error occurs while deleting the task or in case the task is part of a running process
  - deleteTasks
```
void deleteTasks(Collection<String> taskIds,
               String deleteReason)
```
    Deletes all tasks of the given collection, not deleting historic information that is related to these tasks.
    
    Parameters:
    taskIds - The id's of the tasks that will be deleted, cannot be null. All id's in the list that don't have an existing task will be ignored.
    deleteReason - reason the task is deleted. Is recorded in history, if enabled.
    
    Throws:
    
    ActivitiObjectNotFoundException - when one of the tasks does not exist.
    
    ActivitiException - when an error occurs while deleting the tasks or in case one of the tasks is part of a running process.
  - claim
```
void claim(String taskId,
         String userId)
```
    Claim responsibility for a task: the given user is made assignee for the task. The difference with setAssignee(String, String) is that here a check is done if the task already has a user assigned to it. No check is done whether the user is known by the identity component.
    
    Parameters:
    taskId - task to claim, cannot be null.
    userId - user that claims the task. When userId is null the task is unclaimed, assigned to no one.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task doesn't exist.
    
    ActivitiTaskAlreadyClaimedException - when the task is already claimed by another user.
  - unclaim
```
void unclaim(String taskId)
```
    A shortcut to claim(java.lang.String, java.lang.String) with null user in order to unclaim the task
    
    Parameters:
    taskId - task to unclaim, cannot be null.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task doesn't exist.
  - complete
```
void complete(String taskId)
```
    Called when the task is successfully executed.
    
    Parameters:
    taskId - the id of the task to complete, cannot be null.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task exists with the given id.
    
    ActivitiException - when this task is DelegationState.PENDING delegation.
  - delegateTask
```
void delegateTask(String taskId,
                String userId)
```
    Delegates the task to another user. This means that the assignee is set and the delegation state is set to DelegationState.PENDING. If no owner is set on the task, the owner is set to the current assignee of the task.
    
    Parameters:
    taskId - The id of the task that will be delegated.
    userId - The id of the user that will be set as assignee.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task exists with the given id.
  - resolveTask
```
void resolveTask(String taskId)
```
    Marks that the assignee is done with this task and that it can be send back to the owner. Can only be called when this task is DelegationState.PENDING delegation. After this method returns, the delegationState is set to DelegationState.RESOLVED.
    
    Parameters:
    taskId - the id of the task to resolve, cannot be null.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task exists with the given id.
  - resolveTask
```
void resolveTask(String taskId,
               Map<String,Object> variables)
```
    Marks that the assignee is done with this task providing the required variables and that it can be sent back to the owner. Can only be called when this task is DelegationState.PENDING delegation. After this method returns, the delegationState is set to DelegationState.RESOLVED.
    
    Parameters:
    taskId -
    variables -
    
    Throws:
    
    ProcessEngineException - When no task exists with the given id.
  - resolveTask
```
void resolveTask(String taskId,
               Map<String,Object> variables,
               Map<String,Object> transientVariables)
```
    Similar to resolveTask(String, Map), but allows to set transient variables too.
  - complete
```
void complete(String taskId,
            Map<String,Object> variables)
```
    Called when the task is successfully executed, and the required task parameters are given by the end-user.
    
    Parameters:
    taskId - the id of the task to complete, cannot be null.
    variables - task parameters. May be null or empty.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task exists with the given id.
  - complete
```
void complete(String taskId,
            Map<String,Object> variables,
            Map<String,Object> transientVariables)
```
    Similar to complete(String, Map), but allows to set transient variables too.
  - complete
```
void complete(String taskId,
            Map<String,Object> variables,
            boolean localScope)
```
    Called when the task is successfully executed, and the required task parameters are given by the end-user.
    
    Parameters:
    taskId - the id of the task to complete, cannot be null.
    variables - task parameters. May be null or empty.
    localScope - If true, the provided variables will be stored task-local, instead of process instance wide (which is the default for complete(String, Map)).
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task exists with the given id.
  - setAssignee
```
void setAssignee(String taskId,
               String userId)
```
    Changes the assignee of the given task to the given userId. No check is done whether the user is known by the identity component.
    
    Parameters:
    taskId - id of the task, cannot be null.
    userId - id of the user to use as assignee.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task or user doesn't exist.
  - setOwner
```
void setOwner(String taskId,
            String userId)
```
    Transfers ownership of this task to another user. No check is done whether the user is known by the identity component.
    
    Parameters:
    taskId - id of the task, cannot be null.
    userId - of the person that is receiving ownership.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task or user doesn't exist.
  - getIdentityLinksForTask
```
List<IdentityLink> getIdentityLinksForTask(String taskId)
```
    Retrieves the IdentityLinks associated with the given task. Such an IdentityLink informs how a certain identity (eg. group or user) is associated with a certain task (eg. as candidate, assignee, etc.)
  - addCandidateUser
```
void addCandidateUser(String taskId,
                    String userId)
```
    Convenience shorthand for addUserIdentityLink(String, String, String); with type IdentityLinkType.CANDIDATE
    
    Parameters:
    taskId - id of the task, cannot be null.
    userId - id of the user to use as candidate, cannot be null.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task or user doesn't exist.
  - addCandidateGroup
```
void addCandidateGroup(String taskId,
                     String groupId)
```
    Convenience shorthand for addGroupIdentityLink(String, String, String); with type IdentityLinkType.CANDIDATE
    
    Parameters:
    taskId - id of the task, cannot be null.
    groupId - id of the group to use as candidate, cannot be null.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task or group doesn't exist.
  - addUserIdentityLink
```
void addUserIdentityLink(String taskId,
                       String userId,
                       String identityLinkType)
```
    Involves a user with a task. The type of identity link is defined by the given identityLinkType.
    
    Parameters:
    taskId - id of the task, cannot be null.
    userId - id of the user involve, cannot be null.
    identityLinkType - type of identityLink, cannot be null (@see IdentityLinkType).
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task or user doesn't exist.
  - addGroupIdentityLink
```
void addGroupIdentityLink(String taskId,
                        String groupId,
                        String identityLinkType)
```
    Involves a group with a task. The type of identityLink is defined by the given identityLink.
    
    Parameters:
    taskId - id of the task, cannot be null.
    groupId - id of the group to involve, cannot be null.
    identityLinkType - type of identity, cannot be null (@see IdentityLinkType).
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task or group doesn't exist.
  - deleteCandidateUser
```
void deleteCandidateUser(String taskId,
                       String userId)
```
    Convenience shorthand for deleteUserIdentityLink(String, String, String); with type IdentityLinkType.CANDIDATE
    
    Parameters:
    taskId - id of the task, cannot be null.
    userId - id of the user to use as candidate, cannot be null.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task or user doesn't exist.
  - deleteCandidateGroup
```
void deleteCandidateGroup(String taskId,
                        String groupId)
```
    Convenience shorthand for deleteGroupIdentityLink(String, String, String); with type IdentityLinkType.CANDIDATE
    
    Parameters:
    taskId - id of the task, cannot be null.
    groupId - id of the group to use as candidate, cannot be null.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task or group doesn't exist.
  - deleteUserIdentityLink
```
void deleteUserIdentityLink(String taskId,
                          String userId,
                          String identityLinkType)
```
    Removes the association between a user and a task for the given identityLinkType.
    
    Parameters:
    taskId - id of the task, cannot be null.
    userId - id of the user involve, cannot be null.
    identityLinkType - type of identityLink, cannot be null (@see IdentityLinkType).
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task or user doesn't exist.
  - deleteGroupIdentityLink
```
void deleteGroupIdentityLink(String taskId,
                           String groupId,
                           String identityLinkType)
```
    Removes the association between a group and a task for the given identityLinkType.
    
    Parameters:
    taskId - id of the task, cannot be null.
    groupId - id of the group to involve, cannot be null.
    identityLinkType - type of identity, cannot be null (@see IdentityLinkType).
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task or group doesn't exist.
  - setPriority
```
void setPriority(String taskId,
               int priority)
```
    Changes the priority of the task. Authorization: actual owner / business admin
    
    Parameters:
    taskId - id of the task, cannot be null.
    priority - the new priority for the task.
    
    Throws:
    
    ActivitiObjectNotFoundException - when the task doesn't exist.
  - setDueDate
```
void setDueDate(String taskId,
              Date dueDate)
```
    Changes the due date of the task
    
    Parameters:
    taskId - id of the task, cannot be null.
    dueDate - the new due date for the task
    
    Throws:
    
    ActivitiException - when the task doesn't exist.
  - createTaskQuery
```
TaskQuery createTaskQuery()
```
    Returns a new TaskQuery that can be used to dynamically query tasks.
  - createNativeTaskQuery
```
NativeTaskQuery createNativeTaskQuery()
```
    Returns a new NativeQuery for tasks.
  - setVariable
```
void setVariable(String taskId,
               String variableName,
               Object value)
```
    set variable on a task. If the variable is not already existing, it will be created in the most outer scope. This means the process instance in case this task is related to an execution.
  - setVariables
```
void setVariables(String taskId,
                Map<String,? extends Object> variables)
```
    set variables on a task. If the variable is not already existing, it will be created in the most outer scope. This means the process instance in case this task is related to an execution.
  - setVariableLocal
```
void setVariableLocal(String taskId,
                    String variableName,
                    Object value)
```
    set variable on a task. If the variable is not already existing, it will be created in the task.
  - setVariablesLocal
```
void setVariablesLocal(String taskId,
                     Map<String,? extends Object> variables)
```
    set variables on a task. If the variable is not already existing, it will be created in the task.
  - getVariable
```
Object getVariable(String taskId,
                 String variableName)
```
    get a variables and search in the task scope and if available also the execution scopes.
  - getVariable
```
<T> T getVariable(String taskId,
                String variableName,
                Class<T> variableClass)
```
    get a variables and search in the task scope and if available also the execution scopes.
  - getVariableInstance
```
org.activiti.engine.impl.persistence.entity.VariableInstance getVariableInstance(String taskId,
                                                                               String variableName)
```
    The variable. Searching for the variable is done in all scopes that are visible to the given task (including parent scopes). Returns null when no variable value is found with the given name.
    
    Parameters:
    taskId - id of task, cannot be null.
    variableName - name of variable, cannot be null.
    
    Returns:
    the variable or null if the variable is undefined.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no execution is found for the given taskId.
  - hasVariable
```
boolean hasVariable(String taskId,
                  String variableName)
```
    checks whether or not the task has a variable defined with the given name, in the task scope and if available also the execution scopes.
  - getVariableLocal
```
Object getVariableLocal(String taskId,
                      String variableName)
```
    checks whether or not the task has a variable defined with the given name.
  - getVariableLocal
```
<T> T getVariableLocal(String taskId,
                     String variableName,
                     Class<T> variableClass)
```
    checks whether or not the task has a variable defined with the given name.
  - getVariableInstanceLocal
```
org.activiti.engine.impl.persistence.entity.VariableInstance getVariableInstanceLocal(String taskId,
                                                                                    String variableName)
```
    The variable for a task. Returns the variable when it is set for the task (and not searching parent scopes). Returns null when no variable is found with the given name.
    
    Parameters:
    taskId - id of task, cannot be null.
    variableName - name of variable, cannot be null.
    
    Returns:
    the variable or null if the variable is undefined.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task is found for the given taskId.
  - hasVariableLocal
```
boolean hasVariableLocal(String taskId,
                       String variableName)
```
    checks whether or not the task has a variable defined with the given name, local task scope only.
  - getVariables
```
Map<String,Object> getVariables(String taskId)
```
    get all variables and search in the task scope and if available also the execution scopes. If you have many variables and you only need a few, consider using getVariables(String, Collection) for better performance.
  - getVariableInstances
```
Map<String,org.activiti.engine.impl.persistence.entity.VariableInstance> getVariableInstances(String taskId)
```
    All variables visible from the given task scope (including parent scopes).
    
    Parameters:
    taskId - id of task, cannot be null.
    
    Returns:
    the variable instances or an empty map if no such variables are found.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task is found for the given taskId.
  - getVariableInstances
```
Map<String,org.activiti.engine.impl.persistence.entity.VariableInstance> getVariableInstances(String taskId,
                                                                                            Collection<String> variableNames)
```
    The variable values for all given variableNames, takes all variables into account which are visible from the given task scope (including parent scopes).
    
    Parameters:
    taskId - id of taskId, cannot be null.
    variableNames - the collection of variable names that should be retrieved.
    
    Returns:
    the variables or an empty map if no such variables are found.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no taskId is found for the given taskId.
  - getVariablesLocal
```
Map<String,Object> getVariablesLocal(String taskId)
```
    get all variables and search only in the task scope. If you have many task local variables and you only need a few, consider using getVariablesLocal(String, Collection) for better performance.
  - getVariables
```
Map<String,Object> getVariables(String taskId,
                              Collection<String> variableNames)
```
    get values for all given variableNames and search only in the task scope.
  - getVariablesLocal
```
Map<String,Object> getVariablesLocal(String taskId,
                                   Collection<String> variableNames)
```
    get a variable on a task
  - getVariableInstancesLocalByTaskIds
```
List<org.activiti.engine.impl.persistence.entity.VariableInstance> getVariableInstancesLocalByTaskIds(Set<String> taskIds)
```
    get all variables and search only in the task scope.
  - getVariableInstancesLocal
```
Map<String,org.activiti.engine.impl.persistence.entity.VariableInstance> getVariableInstancesLocal(String taskId)
```
    All variable values that are defined in the task scope, without taking outer scopes into account. If you have many task local variables and you only need a few, consider using getVariableInstancesLocal(String, Collection) for better performance.
    
    Parameters:
    taskId - id of task, cannot be null.
    
    Returns:
    the variables or an empty map if no such variables are found.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task is found for the given taskId.
  - getVariableInstancesLocal
```
Map<String,org.activiti.engine.impl.persistence.entity.VariableInstance> getVariableInstancesLocal(String taskId,
                                                                                                 Collection<String> variableNames)
```
    The variable values for all given variableNames that are defined in the given task's scope. (Does not searching parent scopes).
    
    Parameters:
    taskId - id of taskId, cannot be null.
    variableNames - the collection of variable names that should be retrieved.
    
    Returns:
    the variables or an empty map if no such variables are found.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no taskId is found for the given taskId.
  - removeVariable
```
void removeVariable(String taskId,
                  String variableName)
```
    Removes the variable from the task. When the variable does not exist, nothing happens.
  - removeVariableLocal
```
void removeVariableLocal(String taskId,
                       String variableName)
```
    Removes the variable from the task (not considering parent scopes). When the variable does not exist, nothing happens.
  - removeVariables
```
void removeVariables(String taskId,
                   Collection<String> variableNames)
```
    Removes all variables in the given collection from the task. Non existing variable names are simply ignored.
  - removeVariablesLocal
```
void removeVariablesLocal(String taskId,
                        Collection<String> variableNames)
```
    Removes all variables in the given collection from the task (not considering parent scopes). Non existing variable names are simply ignored.
  - getDataObjects
```
Map<String,DataObject> getDataObjects(String taskId)
```
    All DataObjects visible from the given execution scope (including parent scopes).
    
    Parameters:
    taskId - id of task, cannot be null.
    
    Returns:
    the DataObjects or an empty map if no such variables are found.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task is found for the given taskId.
  - getDataObjects
```
Map<String,DataObject> getDataObjects(String taskId,
                                    String locale,
                                    boolean withLocalizationFallback)
```
    All DataObjects visible from the given task scope (including parent scopes).
    
    Parameters:
    taskId - id of task, cannot be null.
    locale - locale the DataObject name and description should be returned in (if available).
    withLocalizationFallback - When true localization will fallback to more general locales if the specified locale is not found.
    
    Returns:
    the DataObjects or an empty map if no DataObjects are found.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task is found for the given task.
  - getDataObjects
```
Map<String,DataObject> getDataObjects(String taskId,
                                    Collection<String> dataObjectNames)
```
    The DataObjects for all given dataObjectNames, takes all dataObjects into account which are visible from the given task scope (including parent scopes).
    
    Parameters:
    taskId - id of task, cannot be null.
    dataObjectNames - the collection of DataObject names that should be retrieved.
    
    Returns:
    the DataObject or an empty map if no DataObjects are found.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task is found for the given taskId.
  - getDataObjects
```
Map<String,DataObject> getDataObjects(String taskId,
                                    Collection<String> dataObjectNames,
                                    String locale,
                                    boolean withLocalizationFallback)
```
    The DataObjects for all given dataObjectNames, takes all dataObjects into account which are visible from the given task scope (including parent scopes).
    
    Parameters:
    taskId - id of task, cannot be null.
    dataObjectNames - the collection of DataObject names that should be retrieved.
    locale - locale the DataObject name and description should be returned in (if available).
    withLocalizationFallback - When true localization will fallback to more general locales if the specified locale is not found.
    
    Returns:
    the DataObjects or an empty map if no such dataObjects are found.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task is found for the given task.
  - getDataObject
```
DataObject getDataObject(String taskId,
                       String dataObject)
```
    The DataObject. Searching for the DataObject is done in all scopes that are visible to the given task (including parent scopes). Returns null when no DataObject value is found with the given name.
    
    Parameters:
    taskId - id of task, cannot be null.
    dataObjectName - name of DataObject, cannot be null.
    
    Returns:
    the DataObject or null if the variable is undefined.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task is found for the given taskId.
  - getDataObject
```
DataObject getDataObject(String taskId,
                       String dataObjectName,
                       String locale,
                       boolean withLocalizationFallback)
```
    The DataObject. Searching for the DataObject is done in all scopes that are visible to the given task (including parent scopes). Returns null when no DataObject value is found with the given name.
    
    Parameters:
    taskId - id of task, cannot be null.
    dataObjectName - name of DataObject, cannot be null.
    locale - locale the DataObject name and description should be returned in (if available).
    withLocalizationFallback - When true localization will fallback to more general locales including the default locale of the JVM if the specified locale is not found.
    
    Returns:
    the DataObject or null if the DataObject is undefined.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no task is found for the given taskId.
  - addComment
```
Comment addComment(String taskId,
                 String processInstanceId,
                 String message)
```
    Add a comment to a task and/or process instance.
  - addComment
```
Comment addComment(String taskId,
                 String processInstanceId,
                 String type,
                 String message)
```
    Add a comment to a task and/or process instance with a custom type.
  - getComment
```
Comment getComment(String commentId)
```
    Returns an individual comment with the given id. Returns null if no comment exists with the given id.
  - deleteComments
```
void deleteComments(String taskId,
                  String processInstanceId)
```
    Removes all comments from the provided task and/or process instance
  - deleteComment
```
void deleteComment(String commentId)
```
    Removes an individual comment with the given id.
    
    Throws:
    
    ActivitiObjectNotFoundException - when no comment exists with the given id.
  - getTaskComments
```
List<Comment> getTaskComments(String taskId)
```
    The comments related to the given task.
  - getTaskComments
```
List<Comment> getTaskComments(String taskId,
                            String type)
```
    The comments related to the given task of the given type.
  - getCommentsByType
```
List<Comment> getCommentsByType(String type)
```
    All comments of a given type.
  - getTaskEvents
```
List<Event> getTaskEvents(String taskId)
```
    The all events related to the given task.
  - getEvent
```
Event getEvent(String eventId)
```
    Returns an individual event with the given id. Returns null if no event exists with the given id.
  - getProcessInstanceComments
```
List<Comment> getProcessInstanceComments(String processInstanceId)
```
    The comments related to the given process instance.
  - getProcessInstanceComments
```
List<Comment> getProcessInstanceComments(String processInstanceId,
                                       String type)
```
    The comments related to the given process instance.
  - createAttachment
```
Attachment createAttachment(String attachmentType,
                          String taskId,
                          String processInstanceId,
                          String attachmentName,
                          String attachmentDescription,
                          InputStream content)
```
    Add a new attachment to a task and/or a process instance and use an input stream to provide the content
  - createAttachment
```
Attachment createAttachment(String attachmentType,
                          String taskId,
                          String processInstanceId,
                          String attachmentName,
                          String attachmentDescription,
                          String url)
```
    Add a new attachment to a task and/or a process instance and use an url as the content
  - saveAttachment
```
void saveAttachment(Attachment attachment)
```
    Update the name and description of an attachment
  - getAttachment
```
Attachment getAttachment(String attachmentId)
```
    Retrieve a particular attachment
  - getAttachmentContent
```
InputStream getAttachmentContent(String attachmentId)
```
    Retrieve stream content of a particular attachment
  - getTaskAttachments
```
List<Attachment> getTaskAttachments(String taskId)
```
    The list of attachments associated to a task
  - getProcessInstanceAttachments
```
List<Attachment> getProcessInstanceAttachments(String processInstanceId)
```
    The list of attachments associated to a process instance
  - deleteAttachment
```
void deleteAttachment(String attachmentId)
```
    Delete an attachment
  - getSubTasks
```
List<Task> getSubTasks(String parentTaskId)
```
    The list of subtasks for this parent task

Interface TaskService

Method Summary

Method Detail

newTask

newTask

saveTask

deleteTask

deleteTasks

deleteTask

deleteTasks

deleteTask

deleteTasks

claim

unclaim

complete

delegateTask

resolveTask

resolveTask

resolveTask

complete

complete

complete

setAssignee

setOwner

getIdentityLinksForTask

addCandidateUser

addCandidateGroup

addUserIdentityLink

addGroupIdentityLink

deleteCandidateUser

deleteCandidateGroup

deleteUserIdentityLink

deleteGroupIdentityLink

setPriority

setDueDate

createTaskQuery

createNativeTaskQuery

setVariable

setVariables

setVariableLocal

setVariablesLocal

getVariable

getVariable

getVariableInstance

hasVariable

getVariableLocal

getVariableLocal

getVariableInstanceLocal

hasVariableLocal

getVariables

getVariableInstances

getVariableInstances

getVariablesLocal

getVariables

getVariablesLocal

getVariableInstancesLocalByTaskIds

getVariableInstancesLocal

getVariableInstancesLocal

removeVariable

removeVariableLocal

removeVariables

removeVariablesLocal

getDataObjects

getDataObjects

getDataObjects

getDataObjects

getDataObject

getDataObject

addComment

addComment

getComment

deleteComments

deleteComment

getTaskComments

getTaskComments

getCommentsByType

getTaskEvents

getEvent

getProcessInstanceComments

getProcessInstanceComments