/**
 * 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.portlet.rendering.worker;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apereo.portal.portlet.om.IPortletWindowId;

/**
 * Interceptor used to add behavior before or after portlet execution. {@link
 * #postExecution(HttpServletRequest, HttpServletResponse, IPortletWindowId, Exception)} will always
 * be called within a finally block.
 *
 */
public interface IPortletExecutionInterceptor {
    /**
     * Called immediately before the worker is submitted to run. Runs in the same thread as the
     * thread that calls {@link IPortletExecutionWorker#submit()}
     *
     * @param request The request used by the worker, this is a SHARED object that is not scoped to
     *     the worker so be careful.
     * @param response The response used by the worker, this is a SHARED object that is not scoped
     *     to the worker so be careful.
     * @param context The portlet execution context
     */
    public void preSubmit(
            HttpServletRequest request,
            HttpServletResponse response,
            IPortletExecutionContext context);

    /**
     * Called immediately before the worker is executed. Runs in the same thread as the thread that
     * executes to worker
     *
     * @param request The request used by the worker, this is a SHARED object that is not scoped to
     *     the worker so be careful.
     * @param response The response used by the worker, this is a SHARED object that is not scoped
     *     to the worker so be careful.
     * @param context The portlet execution context
     */
    public void preExecution(
            HttpServletRequest request,
            HttpServletResponse response,
            IPortletExecutionContext context);

    /**
     * Called immediately after the worker is executed. Runs in the same thread as the thread that
     * executes to worker
     *
     * @param request The request used by the worker, this is a SHARED object that is not scoped to
     *     the worker so be careful.
     * @param response The response used by the worker, this is a SHARED object that is not scoped
     *     to the worker so be careful.
     * @param context The portlet execution context
     * @param e Exception thrown during execution, null if no exception was thrown
     */
    public void postExecution(
            HttpServletRequest request,
            HttpServletResponse response,
            IPortletExecutionContext context,
            Exception e);
}