IdentityService (Activiti - Engine 5.17.0 API)

```
public interface IdentityService
```
Service to manage Users and Groups.

Author:

Tom Baeyens

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`checkPassword(String userId, String password)` Checks if the password is valid for the given user.
`GroupQuery`	`createGroupQuery()` Creates a `GroupQuery` thats allows to programmatically query the groups.
`void`	`createMembership(String userId, String groupId)`
`NativeGroupQuery`	`createNativeGroupQuery()` Returns a new `NativeQuery` for tasks.
`NativeUserQuery`	`createNativeUserQuery()` Returns a new `NativeQuery` for tasks.
`UserQuery`	`createUserQuery()` Creates a `UserQuery` that allows to programmatically query the users.
`void`	`deleteGroup(String groupId)` Deletes the group.
`void`	`deleteMembership(String userId, String groupId)` Delete the membership of the user in the group.
`void`	`deleteUser(String userId)`
`void`	`deleteUserInfo(String userId, String key)` Delete an entry of the generic extensibility key-value pairs associated with a user
`String`	`getUserInfo(String userId, String key)` Generic extensibility key-value pairs associated with a user
`List<String>`	`getUserInfoKeys(String userId)` Generic extensibility keys associated with a user
`Picture`	`getUserPicture(String userId)` Retrieves the picture for a given user.
`Group`	`newGroup(String groupId)` Creates a new group.
`User`	`newUser(String userId)` Creates a new user.
`void`	`saveGroup(Group group)` Saves the group.
`void`	`saveUser(User user)` Saves the user.
`void`	`setAuthenticatedUserId(String authenticatedUserId)` Passes the authenticated user id for this particular thread.
`void`	`setUserInfo(String userId, String key, String value)` Generic extensibility key-value pairs associated with a user
`void`	`setUserPicture(String userId, Picture picture)` Sets the picture for a given user.

- Method Detail
  - newUser
```
User newUser(String userId)
```
    Creates a new user. The user is transient and must be saved using saveUser(User).
    
    Parameters:
    userId - id for the new user, cannot be null.
  - saveUser
```
void saveUser(User user)
```
    Saves the user. If the user already existed, the user is updated.
    
    Parameters:
    user - user to save, cannot be null.
    
    Throws:
    
    RuntimeException - when a user with the same name already exists.
  - createUserQuery
```
UserQuery createUserQuery()
```
    Creates a UserQuery that allows to programmatically query the users.
  - createNativeUserQuery
```
NativeUserQuery createNativeUserQuery()
```
    Returns a new NativeQuery for tasks.
  - deleteUser
```
void deleteUser(String userId)
```
    Parameters:
    userId - id of user to delete, cannot be null. When an id is passed for an unexisting user, this operation is ignored.
  - newGroup
```
Group newGroup(String groupId)
```
    Creates a new group. The group is transient and must be saved using saveGroup(Group).
    
    Parameters:
    groupId - id for the new group, cannot be null.
  - createGroupQuery
```
GroupQuery createGroupQuery()
```
    Creates a GroupQuery thats allows to programmatically query the groups.
  - createNativeGroupQuery
```
NativeGroupQuery createNativeGroupQuery()
```
    Returns a new NativeQuery for tasks.
  - saveGroup
```
void saveGroup(Group group)
```
    Saves the group. If the group already existed, the group is updated.
    
    Parameters:
    group - group to save. Cannot be null.
    
    Throws:
    
    RuntimeException - when a group with the same name already exists.
  - deleteGroup
```
void deleteGroup(String groupId)
```
    Deletes the group. When no group exists with the given id, this operation is ignored.
    
    Parameters:
    groupId - id of the group that should be deleted, cannot be null.
  - createMembership
```
void createMembership(String userId,
                    String groupId)
```
    Parameters:
    userId - the userId, cannot be null.
    groupId - the groupId, cannot be null.
    
    Throws:
    
    RuntimeException - when the given user or group doesn't exist or when the user is already member of the group.
  - deleteMembership
```
void deleteMembership(String userId,
                    String groupId)
```
    Delete the membership of the user in the group. When the group or user don't exist or when the user is not a member of the group, this operation is ignored.
    
    Parameters:
    userId - the user's id, cannot be null.
    groupId - the group's id, cannot be null.
  - checkPassword
```
boolean checkPassword(String userId,
                    String password)
```
    Checks if the password is valid for the given user. Arguments userId and password are nullsafe.
  - setAuthenticatedUserId
```
void setAuthenticatedUserId(String authenticatedUserId)
```
    Passes the authenticated user id for this particular thread. All service method (from any service) invocations done by the same thread will have access to this authenticatedUserId.
  - setUserPicture
```
void setUserPicture(String userId,
                  Picture picture)
```
    Sets the picture for a given user.
    
    Parameters:
    picture - can be null to delete the picture.
    
    Throws:
    
    ActivitiObjectNotFoundException - if the user doesn't exist.
  - getUserPicture
```
Picture getUserPicture(String userId)
```
    Retrieves the picture for a given user.
    
    Throws:
    
    ActivitiObjectNotFoundException - if the user doesn't exist.
  - setUserInfo
```
void setUserInfo(String userId,
               String key,
               String value)
```
    Generic extensibility key-value pairs associated with a user
  - getUserInfo
```
String getUserInfo(String userId,
                 String key)
```
    Generic extensibility key-value pairs associated with a user
  - getUserInfoKeys
```
List<String> getUserInfoKeys(String userId)
```
    Generic extensibility keys associated with a user
  - deleteUserInfo
```
void deleteUserInfo(String userId,
                  String key)
```
    Delete an entry of the generic extensibility key-value pairs associated with a user

Interface IdentityService

Method Summary

Method Detail

newUser

saveUser

createUserQuery

createNativeUserQuery

deleteUser

newGroup

createGroupQuery

createNativeGroupQuery

saveGroup

deleteGroup

createMembership

deleteMembership

checkPassword

setAuthenticatedUserId

setUserPicture

getUserPicture

setUserInfo

getUserInfo

getUserInfoKeys

deleteUserInfo