/*
* Copyright 2014-2016 the original author or authors.
*
* Licensed 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.springframework.session.web.http;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
/**
* Allows managing a mapping of alias to the session id for having multiple active
* sessions at the same time.
*
* @author Rob Winch
* @since 1.0
*
*/
public interface HttpSessionManager {
/**
* Gets the current session's alias from the {@link HttpServletRequest}.
*
* @param request the {@link HttpServletRequest} to obtain the current session's alias
* from.
* @return the current sessions' alias. Cannot be null.
*/
String getCurrentSessionAlias(HttpServletRequest request);
/**
* Gets a mapping of the session alias to the session id from the
* {@link HttpServletRequest}.
*
* @param request the {@link HttpServletRequest} to obtain the mapping from. Cannot be
* null.
* @return a mapping of the session alias to the session id from the
* {@link HttpServletRequest}. Cannot be null.
*/
Map<String, String> getSessionIds(HttpServletRequest request);
/**
* Provides the ability to encode the URL for a given session alias.
*
* @param url the url to encode.
* @param sessionAlias the session alias to encode.
* @return the encoded URL
*/
String encodeURL(String url, String sessionAlias);
/**
* Gets a new and unique Session alias. Typically this will be called to pass into
* {@code HttpSessionManager#encodeURL(java.lang.String)}. For example:
*
* <code>
* String newAlias = httpSessionManager.getNewSessionAlias(request);
* String addAccountUrl = httpSessionManager.encodeURL("./", newAlias);
* </code>
*
* @param request the {@link HttpServletRequest} to get a new alias from
* @return Gets a new and unique Session alias.
*/
String getNewSessionAlias(HttpServletRequest request);
}