cloud.metaapi.sdk.meta_api

Class HistoryFileManager

java.lang.Object

cloud.metaapi.sdk.meta_api.HistoryFileManager

public class HistoryFileManager
extends Object

History storage file manager which saves and loads history on disk

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HistoryFileManager.History Class to store history deals and orders

Field Summary

Fields

Modifier and Type	Field and Description
protected int	updateJobIntervalInMilliseconds Defines interval between update jobs.

Constructor Summary

Constructors

Constructor and Description
HistoryFileManager(String accountId, String application, HistoryStorage historyStorage) Constructs the history file manager instance

Method Summary

Modifier and Type	Method and Description
CompletableFuture<Void>	deleteStorageFromDisk() Deletes storage files from disk
CompletableFuture<HistoryFileManager.History>	getHistoryFromDisk() Retrieves history from saved file
int	getItemSize(Object item) Helper function to calculate object size in bytes in utf-8 encoding
void	setStartNewDealIndex(int index) Sets the index of the earliest changed deal record
void	setStartNewOrderIndex(int index) Sets the index of the earliest changed historyOrder record
void	startUpdateJob() Starts a job to periodically save history on disk
void	stopUpdateJob() Stops a job to periodically save history on disk
CompletableFuture<Void>	updateDiskStorage() Saves unsaved history items to disk storage

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

updateJobIntervalInMilliseconds

protected int updateJobIntervalInMilliseconds

Defines interval between update jobs. Intended to be overriden in tests.

Constructor Detail

HistoryFileManager

public HistoryFileManager(String accountId,
                          String application,
                          HistoryStorage historyStorage)

Constructs the history file manager instance

Parameters:

accountId - accound id

application - MetaApi application id

historyStorage - history storage

Method Detail

startUpdateJob

public void startUpdateJob()

Starts a job to periodically save history on disk

stopUpdateJob

public void stopUpdateJob()

Stops a job to periodically save history on disk

getItemSize

public int getItemSize(Object item)
                throws com.fasterxml.jackson.core.JsonProcessingException

Helper function to calculate object size in bytes in utf-8 encoding

Returns:

size of object in bytes

Throws:

com.fasterxml.jackson.core.JsonProcessingException

setStartNewOrderIndex

public void setStartNewOrderIndex(int index)

Sets the index of the earliest changed historyOrder record

Parameters:

index - of the earliest changed record

setStartNewDealIndex

public void setStartNewDealIndex(int index)

Sets the index of the earliest changed deal record

Parameters:

index - of the earliest changed record

getHistoryFromDisk

public CompletableFuture<HistoryFileManager.History> getHistoryFromDisk()

Retrieves history from saved file

Returns:

completable future resolving with history of deals and orders

updateDiskStorage

public CompletableFuture<Void> updateDiskStorage()

Saves unsaved history items to disk storage

Returns:

completable future which resolves when disk storage is updated

deleteStorageFromDisk

public CompletableFuture<Void> deleteStorageFromDisk()

Deletes storage files from disk

Returns:

completable future which resolves when the storage is deleted