Class DataDirectoryLock

Keeps other server processes off a data directory while this one uses it: LockFileName is held open exclusively, which on Linux is an flock that the kernel releases when the process ends, also when it is killed, so the lock never goes stale.

Inheritance

object

DataDirectoryLock

Implements

IDisposable

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Uniform.Matrix.Server.Storage

Assembly: Uniform.Matrix.Server.dll

Syntax

public sealed class DataDirectoryLock : IDisposable

Remarks

ProcessFileName next to it tells which process holds it, for the message of the next one; it may be left behind, as only the lock counts.

Fields

LockFileName

Name of the lock file in the data directory.

Declaration

public const string LockFileName = "server.lock"

Field Value

Type	Description
string

ProcessFileName

Name of the file with the holder's process ID.

Declaration

public const string ProcessFileName = "server.pid"

Field Value

Type	Description
string

Properties

Directory

The locked data directory.

Declaration

public string Directory { get; }

Property Value

Type	Description
string

Methods

Acquire(string)

Lock directory for this process, creating it when missing; throw DataDirectoryInUseException when another process has it.

Declaration

public static DataDirectoryLock Acquire(string directory)

Parameters

Type	Name	Description
string	directory

Returns

Type	Description
DataDirectoryLock

Dispose()

Release the lock.

Declaration

public void Dispose()

Implements

IDisposable