BookWalker (java 5.5.18-SNAPSHOT API)

All Known Implementing Classes:

BookDumper
```
public interface BookWalker
```
Interface for passive order book traversal. See Book.walk(BookWalker).

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class BookWalker.Direction
Defines order book traversal order

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`onBookItem(Book book, boolean isAsk, int level, BookItem item)`	Called for each order book item
`boolean`	`onWalkFinished(Book book)`	Called at the end of order book traversal for specific exchange and contract
`boolean`	`onWalkStarted(Book book)`	Called at the beginning of order book traversal for specific exchange and contract

- Method Detail
  - onWalkStarted
```
boolean onWalkStarted(Book book)
```
    Called at the beginning of order book traversal for specific exchange and contract
    
    Returns:
    
    false to interrupt order book traversal
  - onBookItem
```
boolean onBookItem(Book book,
                   boolean isAsk,
                   int level,
                   BookItem item)
```
    Called for each order book item
    
    Returns:
    
    false to interrupt order book traversal
  - onWalkFinished
```
boolean onWalkFinished(Book book)
```
    Called at the end of order book traversal for specific exchange and contract
    
    Returns:
    
    false to interrupt order book traversal