org.opencms.flex.CmsFlexRequestContextInfo Maven / Gradle / Ivy
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/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
*
* This library 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 library 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.
*
* For further information about Alkacon Software GmbH & Co. KG, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.flex;
import org.opencms.file.CmsResource;
/**
* Contains information about the OpenCms request context required by the
* Flex implementation.
*
* An instance of this class is attached to every CmsRequestContext as
* an attribute as soon as the request context is wrapped in a flex response.
* Information about the "last modified" and "expire" times of VFS resources are
* stored in this Object.
*
* @since 6.0.0
*/
public class CmsFlexRequestContextInfo {
/** The currently calculated "expires" date for this request context .*/
private long m_dateExpires;
/** The currently calculated "last modified" date for this request context. */
private long m_dateLastModified;
/**
* Public constructor.
*/
public CmsFlexRequestContextInfo() {
// by default the expiration date is the max long value
m_dateExpires = CmsResource.DATE_EXPIRED_DEFAULT;
}
/**
* Returns the "expires" date for this context.
*
* @return the "expires" date for this context
*/
public long getDateExpires() {
return m_dateExpires;
}
/**
* Returns the "last modified" date for this context.
*
* @return the "last modified" date for this context
*/
public long getDateLastModified() {
return m_dateLastModified;
}
/**
* Merges this context info with the values from the other context info.
*
* @param other the context info to merge with
*/
public void merge(CmsFlexRequestContextInfo other) {
updateDateLastModified(other.getDateLastModified());
updateDateExpires(other.getDateExpires());
}
/**
* Updates the "expires" date for this context with the given value.
*
* @param dateExpires the value to update the "expires" date with
*/
public void updateDateExpires(long dateExpires) {
if (dateExpires > System.currentTimeMillis()) {
if (dateExpires < m_dateExpires) {
m_dateExpires = dateExpires;
}
} else {
updateDateLastModified(dateExpires);
}
}
/**
* Updates the "last modified" date for this context with the given value.
*
* The currently stored value is only updated with the new value if
* the new value is either larger (i.e. newer) then the stored value,
* or if the new value is less then zero, which indicates that the "last modified"
* optimization can not be used because the element is dynamic.
*
* @param dateLastModified the value to update the "last modified" date with
*/
public void updateDateLastModified(long dateLastModified) {
if ((m_dateLastModified > -1) && ((dateLastModified > m_dateLastModified) || (dateLastModified < 0))) {
m_dateLastModified = dateLastModified;
}
}
/**
* Updates both the "last modified" and the "expires" date
* for this context with the given values.
*
* @param dateLastModified the value to update the "last modified" date with
* @param dateExpires the value to update the "expires" date with
*/
public void updateDates(long dateLastModified, long dateExpires) {
updateDateLastModified(dateLastModified);
updateDateExpires(dateExpires);
}
/**
* Updates the "last modified" date for this context as well as the
* "expires" date with the values from a given resource.
*
* The "expires" date is the calculated from the given date values
* of resource release and expiration and also the current time.
*
* @param resource the resource to use for updating the context values
*/
public void updateFromResource(CmsResource resource) {
// first set the last modification date
updateDateLastModified(resource.getDateLastModified());
// now use both release and expiration date from the resource to update the expires info
updateDateExpires(resource.getDateReleased());
updateDateExpires(resource.getDateExpired());
}
}