A local disk implementation of IObjectStore. More...

Inheritance diagram for QuantConnect.Lean.Engine.Storage.LocalObjectStore:

Public Member Functions
virtual void	Initialize (int userId, int projectId, string userToken, Controls controls)
	Initializes the object store More...

void	Clear ()
	Will clear the object store state cache. This is useful when the object store is used concurrently by nodes which want to share information More...

bool	ContainsKey (string path)
	Determines whether the store contains data for the specified path More...

byte[]	ReadBytes (string path)
	Returns the object data for the specified path More...

bool	SaveBytes (string path, byte[] contents)
	Saves the object data for the specified path More...

bool	Delete (string path)
	Deletes the object data for the specified path More...

virtual string	GetFilePath (string path)
	Returns the file path for the specified path More...

virtual void	Dispose ()
	Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources. More...

IEnumerator< KeyValuePair< string, byte[]> >	GetEnumerator ()
	Returns an enumerator that iterates through the collection. More...

Protected Member Functions
virtual string	StorageRoot ()
	Storage root path More...

bool	InternalSaveBytes (string path, byte[] contents)
	Won't trigger persist nor will check storage write permissions, useful on initialization since it allows read only permissions to load the object store More...

virtual bool	IsWithinStorageLimit (string path, byte[] contents, bool takePersistLock)
	Validates storage limits are respected on a new save operation More...

string	PathForKey (string path)
	Get's a file path for a given path. Internal use only because it does not guarantee the existence of the file. More...

virtual bool	PersistData ()
	Overridable persistence function More...

virtual void	OnErrorRaised (Exception error)
	Event invocator for the ErrorRaised event More...

Static Protected Attributes
const string	NoReadPermissionsError
	No read permissions error message More...

const string	NoWritePermissionsError
	No write permissions error message More...

Properties
static string	DefaultObjectStore = Path.GetFullPath(Config.Get("object-store-root", "./storage")) `[get, set]`
	Gets the default object store location More...

Controls	Controls `[get]`
	Provides access to the controls governing behavior of this instance, such as the persistence interval More...

string	AlgorithmStorageRoot `[get]`
	The root storage folder for the algorithm More...

FileHandler	FileHandler = new () `[get, set]`
	The file handler instance to use More...

ICollection< string >	Keys `[get]`
	Returns the file paths present in the object store. This is specially useful not to load the object store into memory More...

Properties inherited from QuantConnect.Interfaces.IObjectStore
ICollection< string >	Keys `[get]`
	Returns the file paths present in the object store. This is specially useful not to load the object store into memory More...

Events
EventHandler< ObjectStoreErrorRaisedEventArgs >	ErrorRaised
	Event raised each time there's an error More...

Events inherited from QuantConnect.Interfaces.IObjectStore
EventHandler< ObjectStoreErrorRaisedEventArgs >	ErrorRaised
	Event raised each time there's an error More...

Detailed Description

A local disk implementation of IObjectStore.

Definition at line 35 of file LocalObjectStore.cs.

Member Function Documentation

◆ Initialize()

virtual void QuantConnect.Lean.Engine.Storage.LocalObjectStore.Initialize	(	int	userId,
		int	projectId,
		string	userToken,
		Controls	controls
	)

virtual

Initializes the object store

Parameters

userId	The user id
projectId	The project id
userToken	The user token
controls	The job controls instance

Implements QuantConnect.Interfaces.IObjectStore.

Definition at line 91 of file LocalObjectStore.cs.

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◆ StorageRoot()

virtual string QuantConnect.Lean.Engine.Storage.LocalObjectStore.StorageRoot ( )

protectedvirtual

Storage root path

Definition at line 114 of file LocalObjectStore.cs.

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◆ Clear()

void QuantConnect.Lean.Engine.Storage.LocalObjectStore.Clear ( )

Will clear the object store state cache. This is useful when the object store is used concurrently by nodes which want to share information

Implements QuantConnect.Interfaces.IObjectStore.

Definition at line 181 of file LocalObjectStore.cs.

◆ ContainsKey()

bool QuantConnect.Lean.Engine.Storage.LocalObjectStore.ContainsKey ( string path )

Determines whether the store contains data for the specified path

Parameters

path	The object path

Returns: True if the key was found

Implements QuantConnect.Interfaces.IObjectStore.

Definition at line 194 of file LocalObjectStore.cs.

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◆ ReadBytes()

byte [] QuantConnect.Lean.Engine.Storage.LocalObjectStore.ReadBytes ( string path )

Returns the object data for the specified path

Parameters

path	The object path

Returns: A byte array containing the data

Implements QuantConnect.Interfaces.IObjectStore.

Definition at line 226 of file LocalObjectStore.cs.

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◆ SaveBytes()

bool QuantConnect.Lean.Engine.Storage.LocalObjectStore.SaveBytes	(	string	path,
		byte[]	contents
	)

Saves the object data for the specified path

Parameters

path	The object path
contents	The object data

Returns: True if the save operation was successful

Implements QuantConnect.Interfaces.IObjectStore.

Definition at line 255 of file LocalObjectStore.cs.

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◆ InternalSaveBytes()

bool QuantConnect.Lean.Engine.Storage.LocalObjectStore.InternalSaveBytes	(	string	path,
		byte[]	contents
	)

protected

Won't trigger persist nor will check storage write permissions, useful on initialization since it allows read only permissions to load the object store

Definition at line 297 of file LocalObjectStore.cs.

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◆ IsWithinStorageLimit()

virtual bool QuantConnect.Lean.Engine.Storage.LocalObjectStore.IsWithinStorageLimit	(	string	path,
		byte[]	contents,
		bool	takePersistLock
	)

protectedvirtual

Validates storage limits are respected on a new save operation

Definition at line 313 of file LocalObjectStore.cs.

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◆ Delete()

bool QuantConnect.Lean.Engine.Storage.LocalObjectStore.Delete ( string path )

Deletes the object data for the specified path

Parameters

path	The object path

Returns: True if the delete operation was successful

Implements QuantConnect.Interfaces.IObjectStore.

Definition at line 367 of file LocalObjectStore.cs.

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◆ GetFilePath()

virtual string QuantConnect.Lean.Engine.Storage.LocalObjectStore.GetFilePath ( string path )

virtual

Returns the file path for the specified path

If the key is not already inserted it will just return a path associated with it and add the key with null value

Parameters

path	The object path

Returns: The path for the file

Implements QuantConnect.Interfaces.IObjectStore.

Definition at line 406 of file LocalObjectStore.cs.

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◆ Dispose()

virtual void QuantConnect.Lean.Engine.Storage.LocalObjectStore.Dispose ( )

virtual

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

Definition at line 439 of file LocalObjectStore.cs.

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◆ GetEnumerator()

IEnumerator<KeyValuePair<string, byte[]> > QuantConnect.Lean.Engine.Storage.LocalObjectStore.GetEnumerator ( )

Returns an enumerator that iterates through the collection.

Returns: A T:System.Collections.Generic.IEnumerator`1 that can be used to iterate through the collection.

Definition at line 461 of file LocalObjectStore.cs.

◆ PathForKey()

string QuantConnect.Lean.Engine.Storage.LocalObjectStore.PathForKey ( string path )

protected

Get's a file path for a given path. Internal use only because it does not guarantee the existence of the file.

Definition at line 478 of file LocalObjectStore.cs.

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◆ PersistData()

virtual bool QuantConnect.Lean.Engine.Storage.LocalObjectStore.PersistData ( )

protectedvirtual

Overridable persistence function

Returns: True if persistence was successful, otherwise false

Definition at line 531 of file LocalObjectStore.cs.

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◆ OnErrorRaised()

virtual void QuantConnect.Lean.Engine.Storage.LocalObjectStore.OnErrorRaised ( Exception error )

protectedvirtual

Event invocator for the ErrorRaised event

Definition at line 582 of file LocalObjectStore.cs.

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Member Data Documentation

◆ NoReadPermissionsError

const string QuantConnect.Lean.Engine.Storage.LocalObjectStore.NoReadPermissionsError

staticprotected

Initial value:

= "The current user does not have permission to read from the organization Object Store." +

" Please contact your organization administrator to request permission."

No read permissions error message

Definition at line 40 of file LocalObjectStore.cs.

◆ NoWritePermissionsError

const string QuantConnect.Lean.Engine.Storage.LocalObjectStore.NoWritePermissionsError

staticprotected

Initial value:

= "The current user does not have permission to write to the organization Object Store." +

" Please contact your organization administrator to request permission."

No write permissions error message

Definition at line 46 of file LocalObjectStore.cs.

Property Documentation

◆ DefaultObjectStore

string QuantConnect.Lean.Engine.Storage.LocalObjectStore.DefaultObjectStore = Path.GetFullPath(Config.Get("object-store-root", "./storage"))

staticgetset

Gets the default object store location

Definition at line 57 of file LocalObjectStore.cs.

◆ Controls

Controls QuantConnect.Lean.Engine.Storage.LocalObjectStore.Controls

getprotected

Provides access to the controls governing behavior of this instance, such as the persistence interval

Definition at line 72 of file LocalObjectStore.cs.

◆ AlgorithmStorageRoot

string QuantConnect.Lean.Engine.Storage.LocalObjectStore.AlgorithmStorageRoot

getprotected

The root storage folder for the algorithm

Definition at line 77 of file LocalObjectStore.cs.

◆ FileHandler

FileHandler QuantConnect.Lean.Engine.Storage.LocalObjectStore.FileHandler = new ()

getsetprotected

The file handler instance to use

Definition at line 82 of file LocalObjectStore.cs.

◆ Keys

ICollection<string> QuantConnect.Lean.Engine.Storage.LocalObjectStore.Keys

get

Returns the file paths present in the object store. This is specially useful not to load the object store into memory

Definition at line 171 of file LocalObjectStore.cs.

Event Documentation

◆ ErrorRaised

EventHandler<ObjectStoreErrorRaisedEventArgs> QuantConnect.Lean.Engine.Storage.LocalObjectStore.ErrorRaised

Event raised each time there's an error

Definition at line 52 of file LocalObjectStore.cs.

The documentation for this class was generated from the following file:

Engine/Storage/LocalObjectStore.cs

Public Member Functions

Protected Member Functions

Static Protected Attributes

Properties

Events

Detailed Description

Member Function Documentation

◆ Initialize()

◆ StorageRoot()

◆ Clear()

◆ ContainsKey()

◆ ReadBytes()

◆ SaveBytes()

◆ InternalSaveBytes()

◆ IsWithinStorageLimit()

◆ Delete()

◆ GetFilePath()

◆ Dispose()

◆ GetEnumerator()

◆ PathForKey()

◆ PersistData()

◆ OnErrorRaised()

Member Data Documentation

◆ NoReadPermissionsError

◆ NoWritePermissionsError

Property Documentation

◆ DefaultObjectStore

◆ Controls

◆ AlgorithmStorageRoot

◆ FileHandler

◆ Keys

Event Documentation

◆ ErrorRaised