org.springframework.web.server.session.DefaultWebSessionManager Maven / Gradle / Ivy
/*
* Copyright 2002-2018 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.web.server.session;
import java.util.List;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import org.springframework.util.Assert;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebSession;
/**
* Default implementation of {@link WebSessionManager} delegating to a
* {@link WebSessionIdResolver} for session id resolution and to a
* {@link WebSessionStore}.
*
* @author Rossen Stoyanchev
* @author Rob Winch
* @since 5.0
*/
public class DefaultWebSessionManager implements WebSessionManager {
private WebSessionIdResolver sessionIdResolver = new CookieWebSessionIdResolver();
private WebSessionStore sessionStore = new InMemoryWebSessionStore();
/**
* Configure the id resolution strategy.
* By default an instance of {@link CookieWebSessionIdResolver}.
* @param sessionIdResolver the resolver to use
*/
public void setSessionIdResolver(WebSessionIdResolver sessionIdResolver) {
Assert.notNull(sessionIdResolver, "WebSessionIdResolver is required");
this.sessionIdResolver = sessionIdResolver;
}
/**
* Return the configured {@link WebSessionIdResolver}.
*/
public WebSessionIdResolver getSessionIdResolver() {
return this.sessionIdResolver;
}
/**
* Configure the persistence strategy.
*
By default an instance of {@link InMemoryWebSessionStore}.
* @param sessionStore the persistence strategy to use
*/
public void setSessionStore(WebSessionStore sessionStore) {
Assert.notNull(sessionStore, "WebSessionStore is required");
this.sessionStore = sessionStore;
}
/**
* Return the configured {@link WebSessionStore}.
*/
public WebSessionStore getSessionStore() {
return this.sessionStore;
}
@Override
public Mono getSession(ServerWebExchange exchange) {
return Mono.defer(() -> retrieveSession(exchange)
.switchIfEmpty(this.sessionStore.createWebSession())
.doOnNext(session -> exchange.getResponse().beforeCommit(() -> save(exchange, session))));
}
private Mono retrieveSession(ServerWebExchange exchange) {
return Flux.fromIterable(getSessionIdResolver().resolveSessionIds(exchange))
.concatMap(this.sessionStore::retrieveSession)
.next();
}
private Mono save(ServerWebExchange exchange, WebSession session) {
List ids = getSessionIdResolver().resolveSessionIds(exchange);
if (!session.isStarted() || session.isExpired()) {
if (!ids.isEmpty()) {
// Expired on retrieve or while processing request, or invalidated..
this.sessionIdResolver.expireSession(exchange);
}
return Mono.empty();
}
if (ids.isEmpty() || !session.getId().equals(ids.get(0))) {
this.sessionIdResolver.setSessionId(exchange, session.getId());
}
return session.save();
}
}