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Code Issues Releases Wiki Activity

added timeout for triggering order book updating event

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This commit is contained in:
msg_kurt 2019-09-04 16:49:32 +03:00
parent c01bcc87b1
commit 43c17bae64
2 changed files with 43 additions and 18 deletions
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8
CryptoExchange.Net/Objects/Options.cs
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@ -28,6 +28,10 @@ namespace CryptoExchange.Net.Objects
/// </summary> /// </summary>
public class OrderBookOptions : BaseOptions public class OrderBookOptions : BaseOptions
{ {
/// <summary>
/// Update event raising timeout in milliseconds (to limit it at high-liquidity order books)
/// </summary>
public int UpdateEventTimeout { get; }
/// <summary> /// <summary>
/// The name of the order book implementation /// The name of the order book implementation
/// </summary> /// </summary>
@ -42,8 +46,10 @@ namespace CryptoExchange.Net.Objects
/// </summary> /// </summary>
/// <param name="name">The name of the order book implementation</param> /// <param name="name">The name of the order book implementation</param>
/// <param name="sequencesAreConsecutive">Whether each update should have a consecutive id number. Used to identify and reconnect when numbers are skipped.</param> /// <param name="sequencesAreConsecutive">Whether each update should have a consecutive id number. Used to identify and reconnect when numbers are skipped.</param>
public OrderBookOptions(string name, bool sequencesAreConsecutive) /// <param name="updateInterval">Update event raising timeout in milliseconds (to limit it at high-liquidity order books)</param>
public OrderBookOptions(string name, bool sequencesAreConsecutive, int? updateInterval)
{ {
UpdateEventTimeout = updateInterval ?? 1000;
OrderBookName = name; OrderBookName = name;
SequenceNumbersAreConsecutive = sequencesAreConsecutive; SequenceNumbersAreConsecutive = sequencesAreConsecutive;
} }

21
CryptoExchange.Net/OrderBook/SymbolOrderBook.cs
View File

@ -27,6 +27,7 @@ namespace CryptoExchange.Net.OrderBook
/// <summary> /// <summary>
/// The bid list /// The bid list
/// </summary> /// </summary>
protected SortedList<decimal, OrderBookEntry> bids; protected SortedList<decimal, OrderBookEntry> bids;
private OrderBookStatus status; private OrderBookStatus status;
private UpdateSubscription subscription; private UpdateSubscription subscription;
@ -71,10 +72,17 @@ namespace CryptoExchange.Net.OrderBook
/// </summary> /// </summary>
public event Action<OrderBookStatus, OrderBookStatus> OnStatusChange; public event Action<OrderBookStatus, OrderBookStatus> OnStatusChange;
/// <summary> /// <summary>
/// Event when orderbook was updated /// Event when orderbook was updated, but not more often then timeout setted in orderbook options (1000ms by default). Be careful! with small timeout it can generate a lot of events at high-liquidity order books
/// </summary> /// </summary>
public event Action OnOrderBookUpdate; public event Action OnOrderBookUpdate;
/// <summary> /// <summary>
/// Should be useful for low-liquidity order-books to monitor market activity
/// </summary>
public DateTime LastOrderBookUpdate;
private DateTime LastOrderBookUpdateEventTrigger;
private readonly int updateEventInterval;
/// <summary>
/// The number of asks in the book /// The number of asks in the book
/// </summary> /// </summary>
public int AskCount { get; private set; } public int AskCount { get; private set; }
@ -141,6 +149,7 @@ namespace CryptoExchange.Net.OrderBook
id = options.OrderBookName; id = options.OrderBookName;
processBuffer = new List<ProcessBufferEntry>(); processBuffer = new List<ProcessBufferEntry>();
sequencesAreConsecutive = options.SequenceNumbersAreConsecutive; sequencesAreConsecutive = options.SequenceNumbersAreConsecutive;
updateEventInterval = options.UpdateEventTimeout;
Symbol = symbol; Symbol = symbol;
Status = OrderBookStatus.Disconnected; Status = OrderBookStatus.Disconnected;
@ -262,7 +271,12 @@ namespace CryptoExchange.Net.OrderBook
CheckProcessBuffer(); CheckProcessBuffer();
bookSet = true; bookSet = true;
LastOrderBookUpdate = DateTime.UtcNow;
if ((LastOrderBookUpdate - LastOrderBookUpdateEventTrigger).TotalMilliseconds >= updateEventInterval)
{
OnOrderBookUpdate?.Invoke(); OnOrderBookUpdate?.Invoke();
LastOrderBookUpdateEventTrigger = DateTime.UtcNow;
}
log.Write(LogVerbosity.Debug, $"{id} order book {Symbol} data set: {BidCount} bids, {AskCount} asks"); log.Write(LogVerbosity.Debug, $"{id} order book {Symbol} data set: {BidCount} bids, {AskCount} asks");
} }
} }
@ -303,7 +317,12 @@ namespace CryptoExchange.Net.OrderBook
ProcessUpdate(entry.Type, entry.Entry); ProcessUpdate(entry.Type, entry.Entry);
LastSequenceNumber = lastSequenceNumber; LastSequenceNumber = lastSequenceNumber;
CheckProcessBuffer(); CheckProcessBuffer();
LastOrderBookUpdate = DateTime.UtcNow;
if ((LastOrderBookUpdate - LastOrderBookUpdateEventTrigger).TotalMilliseconds >= updateEventInterval)
{
OnOrderBookUpdate?.Invoke(); OnOrderBookUpdate?.Invoke();
LastOrderBookUpdateEventTrigger = DateTime.UtcNow;
}
log.Write(LogVerbosity.Debug, $"{id} order book {Symbol} update: {entries.Count} entries processed"); log.Write(LogVerbosity.Debug, $"{id} order book {Symbol} update: {entries.Count} entries processed");
} }
} }