StorageManager

StorageManager is operative only when the Task Manager service has been initialized (com.dell.doradus.service.taskmanager.TaskManagerService). This is always the case when the server is started as a standalone process but optional when Doradus is embedded within another application. StorageManager provides the following attributes:

Attribute Name	Description
AppNames	The Doradus application names known to the Task Manager.
GlobalDefaultSettings	The global task schedule settings, which are used for tasks that do not have a more specific (e.g., application- or table-specific) schedule default. The global schedule is usually "never", meaning no default schedule is applied to tasks.
JobList	The list of tasks currently executing.
NodesCount	The number of Cassandra nodes in the cluster.
OS	The operating system of the Doradus server.
OperationMode	The operation mode of the first connected Cassandra mode (NORMAL, LEAVING, JOINING, etc.)
RecentJob	Attributes about the most recent job executed through the StorageManager interface.
ReleaseVersion	The Doradus server release version.
StartMode	The execution mode of the first connected Cassandra node: 1 (FOREGROUND), 2 (BACKGROUND), or 0 (UNKNOWN).

The StorageManager MXBean also provides operations that perform basic administrative functions, summarized below:

Operation Name	Description
getJobByID	Get the status of a job with a specific ID.
startCreateSnapshot	Start a task to create a backup snapshot of the first Cassandra node connected to the Doradus server, assigning the snapshot a name.
startDeleteSnapshot	Delete a backup snapshot with a given name.
startRestoreFromSnapshot	Restore the Cassandra node connected to the Doradus server from a given snapshot game.
sendInterruptTaskCommand	Interrupt an executing task with a given name, belonging to a given application.
sendSuspectSchedulingCommand	Suspend the scheduling of a task with a given name, belonging to a given application.
sendResumeSchedulingCommand	Resume the scheduling of a task with a given name, belonging to a given application.
getAppSettings	Get the default task schedule settings for a given application name.
getTaskStatus	Get the status of a task with a given name, belonging to a given application.