Exchange (apache-nutch 1.20 API)

All Superinterfaces:

Configurable, Pluggable

All Known Implementing Classes:

JexlExchange
```
public interface Exchange
extends Pluggable, Configurable
```

Field Summary

Fields
Modifier and Type Field Description

static String X_POINT_ID
The name of the extension point.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`match(NutchDocument doc)`	Determines if the document must go to the related index writers.
`void`	`open(Map<String,String> parameters)`	Initializes the internal variables.

Methods inherited from interface org.apache.hadoop.conf.Configurable
getConf, setConf

- Field Detail
  - X_POINT_ID
```
static final String X_POINT_ID
```
    The name of the extension point.
- Method Detail
  - open
```
void open(Map<String,String> parameters)
```
    Initializes the internal variables.
    
    Parameters:
    
    parameters - Params from the exchange configuration.
  - match
```
boolean match(NutchDocument doc)
```
    Determines if the document must go to the related index writers.
    
    Parameters:
    
    doc - The given document.
    
    Returns:
    
    True if the given document match with this exchange. False in other case.