Bookmap forum

Hello all, 

I am currently trying to figure out how I can access orderbook data from within the Java API. Here's what I have so far:

If you see in my debugger, I can view the orderbook object if I insert a breakpoint in my overridden onBar function. I can view Bar data with the built in Bar object no problem. For example:
bar.getClose(); if I want to access the last closing price of said bar.

However, anytime I try to access any kind of orderbook information, for instance:orderBook.getBestAskPriceOrNone();I get the following error in my Bookmap.jar instance when I reload my addon:

java.lang.NullPointerException: Cannot invoke "velox.api.layer1.layers.utils.OrderBook.getBestAskPriceOrNone()" because "orderBook" is null


Obviously, as you can see from the screenshot included, that orderBook is not null. I am assuming this is because I am using the free version of Bookmap for development right now and I have not purchased an MBO data package. 

I would like to know if this is something I need to do, and if so, is there anyway to access COB data without having an MBO data subscription?

Thank you for your help in advance. Have a good day!

Thx for your question, we will figure that out. API should work correctly for any Bookmap package.

Order book can be null if depth data starts a bit late which may be at the very beginning of data feed. Please check if it is null before accessing it.

Hi Andry,

Thank you so much that worked perfectly! That probably saved me a whole day or two of going on wild goose chases