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HttpRequestAndSessionHolder.java
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HttpRequestAndSessionHolder.java
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/*
* Copyright 2015, 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.zanata.servlet;
import java.util.Optional;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Observes;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.apache.deltaspike.core.api.lifecycle.Destroyed;
import org.apache.deltaspike.core.api.lifecycle.Initialized;
/**
* DeltaSpike will always inject a HttpServletRequest or HttpSession proxy
* object even when you don't have an active request. Invoke any method on the
* proxy object will result in an IllegalStateException. This way we will be
* able to get an optional request or session object in the cases where it's
* optional.
*
* @author Patrick Huang <a
* href="mailto:pahuang@redhat.com">pahuang@redhat.com</a>
*/
@ApplicationScoped
public class HttpRequestAndSessionHolder {
private static final ThreadLocal<HttpServletRequest> REQUEST =
new ThreadLocal<>();
private static String defaultServerPath;
void setRequest(@Observes @Initialized HttpServletRequest request) {
if (REQUEST.get() != null) {
throw new IllegalStateException(
"There is already a request for this thread");
}
REQUEST.set(request);
if (defaultServerPath == null) {
defaultServerPath = request.getScheme() + "://" + request.getServerName()
+ ":" + request.getServerPort()
+ request.getContextPath();
}
}
void removeRequest(@Observes @Destroyed HttpServletRequest request) {
REQUEST.remove();
}
public static Optional<HttpServletRequest> getRequest() {
return Optional.ofNullable(REQUEST.get());
}
public static Optional<HttpSession> getHttpSession() {
Optional<HttpServletRequest> requestOpt = getRequest();
if (requestOpt.isPresent()) {
return Optional.of(requestOpt.get().getSession());
}
return Optional.empty();
}
public static Optional<HttpSession> getHttpSession(boolean create) {
Optional<HttpServletRequest> requestOpt = getRequest();
if (requestOpt.isPresent()) {
return Optional.of(requestOpt.get().getSession(create));
}
return Optional.empty();
}
public static String getDefaultServerPath() {
return defaultServerPath;
}
}