/**
* Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information regarding copyright ownership. Apereo
* licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use
* this file except in compliance with the License. You may obtain a copy of the License at the
* following location:
*
* <p>http://www.apache.org/licenses/LICENSE-2.0
*
* <p>Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apereo.portal.rendering;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apereo.portal.utils.cache.CacheKey;
/**
* Base interface for rendering pipeline components. A component can return an event reader and a
* corresponding cache key or just the cache key.
*
* <p>Implementations must be thread safe.
*
* @param <R> The event reader implementation
*/
public interface PipelineComponent<R, E> {
/** Get the cache key for the request */
public CacheKey getCacheKey(HttpServletRequest request, HttpServletResponse response);
/** Get the event reader and corresponding cache key for the request */
public PipelineEventReader<R, E> getEventReader(
HttpServletRequest request, HttpServletResponse response);
}