001/* 002 * Copyright 2012-2017 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.boot.autoconfigure.session; 018 019import java.util.Collections; 020import java.util.List; 021 022import org.springframework.session.SessionRepository; 023import org.springframework.util.ObjectUtils; 024 025/** 026 * Exception thrown when multiple {@link SessionRepository} implementations are available 027 * with no way to know which implementation should be used. 028 * 029 * @author Stephane Nicoll 030 * @since 2.0.0 031 */ 032public class NonUniqueSessionRepositoryException extends RuntimeException { 033 034 private final List<Class<?>> availableCandidates; 035 036 public NonUniqueSessionRepositoryException(List<Class<?>> availableCandidates) { 037 super("Multiple session repository candidates are available, set the " 038 + "'spring.session.store-type' property accordingly"); 039 this.availableCandidates = (!ObjectUtils.isEmpty(availableCandidates) 040 ? availableCandidates : Collections.emptyList()); 041 } 042 043 public List<Class<?>> getAvailableCandidates() { 044 return this.availableCandidates; 045 } 046 047}