http://www.jboss.org/xnio: The API JAR of the XNIO project (JBoss by Red Hat) 

package org.xnio;


An operation which may be cancelled.

/**
 * An operation which may be cancelled.
 */
public interface Cancellable {

    
Cancel an operation.  The actual cancel may be synchronous or asynchronous.

Returns:this instance
/**
     * Cancel an operation.  The actual cancel may be synchronous or asynchronous.
     *
     * @return this instance
     */
    Cancellable cancel();
}