FilterChain (Java Servlet 4.0)

```
public interface FilterChain
```
A FilterChain is an object provided by the servlet container to the developer giving a view into the invocation chain of a filtered request for a resource. Filters use the FilterChain to invoke the next filter in the chain, or if the calling filter is the last filter in the chain, to invoke the resource at the end of the chain.

Since:

Servlet 2.3

See Also:

Filter

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`doFilter(ServletRequest request, ServletResponse response)`	Causes the next filter in the chain to be invoked, or if the calling filter is the last filter in the chain, causes the resource at the end of the chain to be invoked.

- Method Detail
  - doFilter
```
void doFilter(ServletRequest request,
              ServletResponse response)
       throws IOException,
              ServletException
```
    Causes the next filter in the chain to be invoked, or if the calling filter is the last filter in the chain, causes the resource at the end of the chain to be invoked.
    
    Parameters:
    
    request - the request to pass along the chain.
    
    response - the response to pass along the chain.
    
    Throws:
    
    IOException - if an I/O related error has occurred during the processing
    
    ServletException - if an exception has occurred that interferes with the filterChain's normal operation