/*
* JBoss, Home of Professional Open Source.
* Copyright 2013, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.clustering.web.undertow.session;
import io.undertow.UndertowMessages;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.session.SessionConfig;
import io.undertow.server.session.SessionListener;
import io.undertow.server.session.SessionListeners;
import io.undertow.server.session.SessionManagerStatistics;
import java.time.Duration;
import java.util.Base64;
import java.util.Collections;
import java.util.OptionalLong;
import java.util.Set;
import java.util.concurrent.locks.StampedLock;
import org.wildfly.clustering.ee.Batch;
import org.wildfly.clustering.ee.Batcher;
import org.wildfly.clustering.web.session.ImmutableSession;
import org.wildfly.clustering.web.session.Session;
import org.wildfly.clustering.web.session.SessionManager;
import org.wildfly.clustering.web.undertow.logging.UndertowClusteringLogger;
/**
* Adapts a distributable {@link SessionManager} to an Undertow {@link io.undertow.server.session.SessionManager}.
* @author Paul Ferraro
*/
public class DistributableSessionManager implements UndertowSessionManager {
private final String deploymentName;
private final SessionListeners listeners;
private final SessionManager<LocalSessionContext, Batch> manager;
private final RecordableSessionManagerStatistics statistics;
private final StampedLock lifecycleLock = new StampedLock();
// Guarded by this
private OptionalLong lifecycleStamp = OptionalLong.empty();
public DistributableSessionManager(String deploymentName, SessionManager<LocalSessionContext, Batch> manager, SessionListeners listeners, RecordableSessionManagerStatistics statistics) {
this.deploymentName = deploymentName;
this.manager = manager;
this.listeners = listeners;
this.statistics = statistics;
}
@Override
public SessionListeners getSessionListeners() {
return this.listeners;
}
@Override
public SessionManager<LocalSessionContext, Batch> getSessionManager() {
return this.manager;
}
@Override
public synchronized void start() {
this.lifecycleStamp.ifPresent(stamp -> this.lifecycleLock.unlock(stamp));
this.manager.start();
if (this.statistics != null) {
this.statistics.reset();
}
}
@Override
public synchronized void stop() {
if (!this.lifecycleStamp.isPresent()) {
try {
this.lifecycleStamp = OptionalLong.of(this.lifecycleLock.writeLockInterruptibly());
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
this.manager.stop();
}
}
private Runnable getSessionCloseTask() {
long stamp = this.lifecycleLock.tryReadLock();
if (stamp == 0) {
throw UndertowClusteringLogger.ROOT_LOGGER.sessionManagerStopped();
}
return () -> this.lifecycleLock.unlock(stamp);
}
@Override
public io.undertow.server.session.Session createSession(HttpServerExchange exchange, SessionConfig config) {
if (config == null) {
throw UndertowMessages.MESSAGES.couldNotFindSessionCookieConfig();
}
String requestedId = config.findSessionId(exchange);
String id = (requestedId == null) ? this.manager.createIdentifier() : requestedId;
Runnable closeTask = this.getSessionCloseTask();
boolean close = true;
try {
Batcher<Batch> batcher = this.manager.getBatcher();
// Batch will be closed by Session.close();
Batch batch = batcher.createBatch();
try {
Session<LocalSessionContext> session = this.manager.createSession(id);
if (session == null) {
throw UndertowClusteringLogger.ROOT_LOGGER.sessionAlreadyExists(id);
}
if (requestedId == null) {
config.setSessionId(exchange, id);
}
io.undertow.server.session.Session result = new DistributableSession(this, session, config, batcher.suspendBatch(), closeTask);
this.listeners.sessionCreated(result, exchange);
if (this.statistics != null) {
this.statistics.record(result);
}
close = false;
return result;
} catch (RuntimeException | Error e) {
batch.discard();
throw e;
} finally {
if (close) {
batch.close();
}
}
} finally {
if (close) {
closeTask.run();
}
}
}
@Override
public io.undertow.server.session.Session getSession(HttpServerExchange exchange, SessionConfig config) {
if (config == null) {
throw UndertowMessages.MESSAGES.couldNotFindSessionCookieConfig();
}
String id = config.findSessionId(exchange);
if (id == null) {
return null;
}
// If requested id contains invalid characters, then session cannot exist and would otherwise cause session lookup to fail
try {
Base64.getUrlDecoder().decode(id);
} catch (IllegalArgumentException e) {
return null;
}
Runnable closeTask = this.getSessionCloseTask();
boolean close = true;
try {
Batcher<Batch> batcher = this.manager.getBatcher();
Batch batch = batcher.createBatch();
try {
Session<LocalSessionContext> session = this.manager.findSession(id);
if (session == null) {
return null;
}
io.undertow.server.session.Session result = new DistributableSession(this, session, config, batcher.suspendBatch(), closeTask);
close = false;
return result;
} catch (RuntimeException | Error e) {
batch.discard();
throw e;
} finally {
if (close) {
batch.close();
}
}
} finally {
if (close) {
closeTask.run();
}
}
}
@Override
public void registerSessionListener(SessionListener listener) {
this.listeners.addSessionListener(listener);
}
@Override
public void removeSessionListener(SessionListener listener) {
this.listeners.removeSessionListener(listener);
}
@Override
public void setDefaultSessionTimeout(int timeout) {
this.manager.setDefaultMaxInactiveInterval(Duration.ofSeconds(timeout));
}
@Override
public Set<String> getTransientSessions() {
// We are a distributed session manager, so none of our sessions are transient
return Collections.emptySet();
}
@Override
public Set<String> getActiveSessions() {
return this.manager.getActiveSessions();
}
@Override
public Set<String> getAllSessions() {
return this.manager.getLocalSessions();
}
@Override
public io.undertow.server.session.Session getSession(String sessionId) {
try (Batch batch = this.manager.getBatcher().createBatch()) {
try {
ImmutableSession session = this.manager.viewSession(sessionId);
return (session != null) ? new DistributableImmutableSession(this, session) : null;
} catch (RuntimeException | Error e) {
batch.discard();
throw e;
}
}
}
@Override
public String getDeploymentName() {
return this.deploymentName;
}
@Override
public SessionManagerStatistics getStatistics() {
return this.statistics;
}
@Override
public boolean equals(Object object) {
if (!(object instanceof DistributableSessionManager)) return false;
DistributableSessionManager manager = (DistributableSessionManager) object;
return this.deploymentName.equals(manager.getDeploymentName());
}
@Override
public int hashCode() {
return this.deploymentName.hashCode();
}
@Override
public String toString() {
return this.deploymentName;
}
}