CachedWebDataSource (Dependency-Check Core 11.1.0 API)

All Known Implementing Classes:

EngineVersionCheck, HostedSuppressionsDataSource, KnownExploitedDataSource, LocalDataSource, NvdApiDataSource, RetireJSDataSource
```
public interface CachedWebDataSource
```
Defines a data source who's data is retrieved from the Internet. This data can be downloaded and the local cache updated.

Author:

Jeremy Long

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`purge(Engine engine)`	Deletes any locally cached data.
`boolean`	`update(Engine engine)`	Determines if an update to the current data store is needed, if it is the new data is downloaded from the Internet and imported into the current cached data store.

- Method Detail
  - update
```
boolean update(Engine engine)
        throws UpdateException
```
    Determines if an update to the current data store is needed, if it is the new data is downloaded from the Internet and imported into the current cached data store.
    
    Parameters:
    
    engine - a reference to the dependency-check engine
    
    Returns:
    
    whether or not an update was made to the CveDB
    
    Throws:
    
    UpdateException - is thrown if there is an exception downloading the data or updating the data store.
  - purge
```
boolean purge(Engine engine)
```
    Deletes any locally cached data.
    
    Parameters:
    
    engine - a reference to the dependency-check engine
    
    Returns:
    
    true if the purge was successful; otherwise false