Enum Class FeatureServiceSessionType
Session types — transient and persistent — let you control how multiple viewers and editors access branch versioned
feature services. By default, a web map or web scene with branch versioned feature services (a
version) loads as a
TRANSIENT type; you can change this type to
PERSISTENT at the map or scene level when you load the map or scene.
When you switch the
ServiceGeodatabase version being used via
a read operation is started on the new version before releasing the previous version. If acquiring a shared lock on
the new version fails (for example, if another user is editing the version), an error is raised. This behavior allows
you to keep the user connected to the original version when the version they want is not yet available.
For descriptions of additional ways to manage multiple viewers and editors in branch versioned data, such as using multiple tiers of editors, see the ArcGIS Pro discussion on branch version scenarios.
Enum Constant Details
TRANSIENTpublic static final FeatureServiceSessionType TRANSIENTA momentary session is used during queries and edit operations.
This type of session will avoid holding a lock any longer than necessary, allowing other clients to connect to, query, and edit a version being used by the
ServiceGeodatabase. Use this type of session when concurrency is more important than data consistency between queries or between concurrent users.
This is the default value.
PERSISTENTpublic static final FeatureServiceSessionType PERSISTENTA session is held open as long as tables are actively reading or writing.
This type of session will hold a lock on the version the
ServiceGeodatabaseis working with, ensuring data consistency but decreasing concurrency. This will create a persistent lock for both read and edit sessions.
During read sessions, a shared lock will be held while tables are connected to the feature service, preventing other clients from editing the version.
During edit sessions, an exclusive lock will be held while edits have been made to the locally cached data, preventing other clients from both reading and editing. When all edits are successfully applied to the service, the exclusive lock is released.
valuespublic static FeatureServiceSessionType values()Returns an array containing the constants of this enum class, in the order they are declared.
- an array containing the constants of this enum class, in the order they are declared
valueOfReturns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)