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* Support sourcing custom data from ObjectStore
* Add Python regression algorithm
* Wire engine to pass ObjectStore down to the stream readers
* Minor changes
* Minor unit tests fixes
* Remove unused SetupHandlerParameters.ObjectStore
* Minor changes
* Minor changes
* Support single-file zipped data to be sourced from object store
* Assert object store custom data history requests in regression algorithms
* Add custom object store data live data feed unit test
* Add multi-file object store custom data regression algorithms
* Minor fix
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* Add BaseDataCollectionAggregatorReader
- Add enumerable for BaseDataCollection
- Add BaseDataCollectionAggregatorReader
- Clean up CollectionSubscriptionDataSourceReader
* Address reviews
- Add new FileFormat that will be handled by the new Reader
- Adding unit tests for the new BaseDataCollectionAggregatorReader
- Some DataSourceReader duplication cleaning up
* Minor adjustment after some live trading tests
Updates CollectionSubscriptionDataSourceReader to raise InvalidSource event
when a created reader is empty. The most common case for this to happen is
when the file is not found.
See #3618
Updates usages of GetBaseDataInstance that have a config in scope to use this
new method. This method properly assigns the symbol to the newly created base
data instance. This enables some of the new flag methods to work as expected.
Updated other poor usages where we weren't setting the symbol property.
See #3618
- Adding `IStreamReader.RateLimit { get; }` specifying if a stream
reader `ReadLine()` calls should be rate limited by the source readers.
- Adding two failling unit tests in `master`
Through `SubscriptionDataSource`.
Exceptions, cocumenting, cleaning and testing adjust
make isLiveMode mandatory in the SubscriptionDataSource constructor
Calls to SubscriptionDataSource implements new bool argument
csproj file mistake fixed
Clean up nullable from prevoius implementation.
Revert "Exceptions, cocumenting, cleaning and testing adjust"
This reverts commit 7da7a9fca195b327a1322c0c7c4a7a088b2f1099.
SubscriptionDataSource back to default.
Uisng LiveMode flag from the calling contex
_delivered variabl setting.
Comments fixed
xml doc fix
The convention throughout the documentation and source code is to either
return null or a new, uninitialized object to indicate that the reader method
was unable to produce an instance from the previous content. It appears over
time that these filters were forgotten within the data enumerator stacks.
It is not uncommon that a web service would require some form of
authentication headers to be provided. This change aims to enable
this by adding the header information to the source. This design
allows a user's custom data type to return the source properly
hydrated with the required header values before being sent back
through the rest of the LEAN infrastructure.
Diff newly downloaded calendar entries against the previous ones we
emited. Also, time stamp the data as utc now since it should be emitted
immediately.
Refactored IDataProvider interface to return stream. The IDataProvider
Fetch method now only takes a key. The IDataProvider
has been reshuffled to be at the bottom of the LeanDataStack. It provides
data to the rest of the Lean stack. The default implementation of IDataProvider reads
data from disc.
All IDataCacheProviders now have constructors which take IDataProviders
and use them to find data on disc.
Renamed DataCacheProvider to ZipDataCacheProvider
Added comments to IDataProvider and it's implementations
Added comments to IDataCacheProvider and it's implementations
Fixed bug where DataCacheProvider was returning a stream without closing
the stream. Also, ZipFiles returned from ZipFileCacheProvider are
effectively disposed.
Removed date field from IDataCacheProvider interface
This interface was built around the existing implementation of the
DataCacheProvider. It's purpose is to define a method for caching data
files. Currently, most data files are either read from disc or retrieved
remotely. The IDataChceProvider returns returns a Stream and can handle
many types of data. The IDataFileCacheProvider is needed because keeping data in memory will improve performance and overcome certain File read/write limitations (such as sharing violations) currently experienced by Lean.
There are two implementations of this interface. The first is the
SingleZipEntryDataCache. This is the default implementation. It does not
cache and returns the first entry found within a ZipFile. The second is
the ZipEntryCacheProvider. This is a rework of the existing
DataCachePrivider. It caches ZipFiles for up to 10 seconds. It can
return specific entries for option and future ZipFiles. Otherwise, it
returns the first entry in a ZipFile.
Added IDataFileCacheProvider as parameter to IHistoryProvider.Initialize()
The IDataFileCacheProvider is very useful for the IHistoryProvider in that it can eliminate the need for history request to touch disc. This can greatly improve peerformance and eliminate disc bugs associated with disc read/writes. To minimize changes throughtout Lean, the default value for the IDataFileCacheProvider is null in the IHistoryProvider.Initialize method.
IDataCacheProviders are passed down the Lean stack. Each instance of a Subscription Enumerator factory decides what cache it
will use. In other words, the IDataCacheProvider is not configurable from
config.json. The IDataCacheProvider is passwed down the stack form the
Enumerator factory to the IStreamReader where it is used to retrieve data.
Added useful helper method to Unizp files into a Stream.
Jhonathan Abreu