How to have a continuous order book of spot symbols?

API Spot/Margin API
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1

Since the partial depth gives us results every 100ms, so there might be some trades going on in the 0-99ms part and we may miss those packets to include in our order book.
So how do I maintain an order book continuously?

2

Here is recommendation of how to maintain the local orderbook:

https://binance-docs.github.io/apidocs/spot/en/#how-to-manage-a-local-order-book-correctly

3

我获取到值的时候。经常报错。
DepthCacheExample depthCacheExample = webSocketMap.get(convertThirdSymbol(symbol));

NavigableMap<BigDecimal, BigDecimal> asks = depthCacheExample.getAsks();

NavigableMap<BigDecimal, BigDecimal> bids = depthCacheExample.getBids();

我去拿里面的数据的时候，经常报错。

[Binance]客户端异常：java.util.ConcurrentModificationException