ServiceState (clsServer)
[!NOTA]
Questa caratteristica verrà rimossa a partire dalla prossima versione di Microsoft SQL Server. Non utilizzare questa caratteristica in un nuovo progetto di sviluppo e modificare non appena possibile le applicazioni in cui è attualmente implementata.
The ServiceState property of an object of ClassType clsServer contains the execution state of the Analysis server service (MSSQLServerOLAPService).
Data Type
Long
Values
The values of this property are different depending on whether the property is being read or set.
The following values are returned when reading this property.
Value |
Description |
|---|---|
SERVICE_CONTINUE_PENDING |
A previous request to continue a paused service is pending. |
SERVICE_PAUSE_PENDING |
A previous request to pause a running service is pending. |
SERVICE_PAUSED |
The service is paused. |
SERVICE_RUNNING |
The service is running. |
SERVICE_START_PENDING |
The service is starting. |
SERVICE_STOP_PENDING |
The service is stopping. |
SERVICE_STOPPED |
The service is not running. |
The following table describes the values used to control the Analysis server.
Value |
Requested action |
|---|---|
SERVICE_PAUSED |
Pause the service. |
SERVICE_RUNNING |
Start the service if stopped or paused. |
SERVICE_STOP |
Stop the service. |
Access
Read/write
Osservazioni
Read the property to query the status of the service. To change the execution state of the service, set the property to a value. Decision Support Objects (DSO) partially implements the service control functions of the Microsoft® Win32® API.
If a requested action cannot be completed, such as attempting to pause a service that is not running, or the request times out (within 60 seconds), an error occurs.
Esempio
Use the following code to set the execution state of MSSQLServerOLAPService:
' Analysis server service control constants
Const OLAP_SERVICE_RUNNING = &H4
Const OLAP_SERVICE_PAUSED = &H7
Const OLAP_SERVICE_STOP = &H1
' Analysis server status and error return constants
Const SERVICE_CONTINUE_PENDING = &H5
Const SERVICE_PAUSE_PENDING = &H6
Const SERVICE_PAUSED = &H7
Const SERVICE_RUNNING = &H4
Const SERVICE_START_PENDING = &H2
Const SERVICE_STOP_PENDING = &H3
Const SERVICE_STOPPED = &H1
' Additional error return constants
Const SERVICE_ACCEPT_PAUSE_CONTINUE = &H2
Const SERVICE_ACCEPT_SHUTDOWN = &H4
Const SERVICE_ACCEPT_STOP = &H1
Const SERVICE_ACTIVE = &H1
Const SERVICE_CHANGE_CONFIG = &H2
Const SERVICE_CONTROL_CONTINUE = &H3
Const SERVICE_CONTROL_INTERROGATE = &H4
Const SERVICE_CONTROL_PAUSE = &H2
Const SERVICE_CONTROL_SHUTDOWN = &H5
Const SERVICE_CONTROL_STOP = &H1
Const SERVICE_ENUMERATE_DEPENDENTS = &H8
Const SERVICE_INACTIVE = &H2
Const SERVICE_INTERROGATE = &H80
Const SERVICE_NO_CHANGE = &HFFFF
Const SERVICE_PAUSE_CONTINUE = &H40
Const SERVICE_QUERY_CONFIG = &H1
Const SERVICE_QUERY_STATUS = &H4
Const SERVICE_STATE_ALL = (SERVICE_ACTIVE Or SERVICE_INACTIVE)
Const SERVICE_USER_DEFINED_CONTROL = &H100
Const SERVICE_WAIT_MAX_SECONDS As Integer = 30
' ==============================================================
' OlapServiceControl function
' Returns True or False
' Calling parameters:
' - objServer is an object of ClassType clsServer
' that has been created and initialized
' - iCmdReq is one of the Analysis server service
' control constants
' - lngStatus receives the status (one of the Analysis
' server status constants)
' - lngErr receives status if function fails (one of the Analysis
' server status constants or one of the additional error constants)
Friend Function OlapServiceControl(objServer As Object, _
ByVal iCmdReq As Integer, _
ByRef lngStatus As Long, _
ByRef lngErr As Long) As Boolean
Dim bRet As Boolean
Dim lngSrvStat As Long
Dim lngControlCmd As Long
lngSrvStat = objServer.ServiceState
bRet = False
lngControlCmd = iCmdReq
lngErr = 0
On Error GoTo Err_State
Select Case iCmdReq
' Caller wants to start the server
Case SERVICE_RUNNING
' Check the current server status
Select Case lngSrvStat
' If it is already running, return True
Case SERVICE_RUNNING
bRet = True
Case SERVICE_PAUSED, SERVICE_STOPPED
objServer.ServiceState = lngControlCmd
bRet = True
End Select
Case SERVICE_PAUSED ' Caller wants to pause the server
Select Case lngSrvStat
Case SERVICE_PAUSED
bRet = True
Case SERVICE_RUNNING
objServer.ServiceState = lngControlCmd
bRet = True
' Trying to pause a stopped service
' raises an error from the Server object.
Case SERVICE_STOPPED
bRet = False
End Select
Case SERVICE_STOPPED ' Caller wants to stop the server
Select Case lngSrvStat
Case SERVICE_STOPPED
bRet = True
Case SERVICE_RUNNING
objServer.ServiceState = lngControlCmd
bRet = True
' Trying to stop a paused service
' raises an error from the Server object.
Case SERVICE_PAUSED
bRet = False
End Select
End Select
' Put the current state of the service into lngStatus
lngStatus = objServer.ServiceState
OlapServiceControl = bRet
Exit Function
Err_State:
' Catch the error returned by the server object
' Some reasons that can cause an error:
' Server object unable to contact service control
' manager or Analysis service application
' Service does not respond to state change
' request within 60 seconds
' An invalid request is sent to the service (for example,
' trying to pause a stopped service)
lngStatus = objServer.ServiceState
lngErr = Err.Number
OlapServiceControl = False
End Function