org.opencms.gwt.CmsGwtService 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, 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.gwt;
import org.opencms.file.CmsObject;
import org.opencms.file.CmsProperty;
import org.opencms.file.CmsResource;
import org.opencms.file.CmsResourceFilter;
import org.opencms.file.CmsUser;
import org.opencms.lock.CmsLockActionRecord;
import org.opencms.lock.CmsLockUtil;
import org.opencms.main.CmsException;
import org.opencms.main.CmsLog;
import org.opencms.main.OpenCms;
import org.opencms.security.CmsRole;
import org.opencms.security.CmsRoleViolationException;
import org.opencms.util.CmsUUID;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import com.google.gwt.user.server.rpc.SerializationPolicy;
/**
* Wrapper for GWT services served through OpenCms.
*
* @since 8.0.0
*/
public class CmsGwtService extends RemoteServiceServlet {
/** The static log object for this class. */
private static final Log LOG = CmsLog.getLog(CmsGwtService.class);
/** Serialization id. */
private static final long serialVersionUID = 8119684308154724518L;
/** The service class context. */
private CmsGwtServiceContext m_context;
/** The current CMS context. */
private ThreadLocal m_perThreadCmsObject;
/**
* Constructor.
*/
public CmsGwtService() {
super();
}
/**
* Checks the permissions of the current user to match the required security level.
*
* Note that the current request and response are not available yet.
*
* Override if needed.
*
* @param cms the current cms object
*
* @throws CmsRoleViolationException if the security level can not be satisfied
*/
public void checkPermissions(CmsObject cms) throws CmsRoleViolationException {
OpenCms.getRoleManager().checkRole(cms, CmsRole.ELEMENT_AUTHOR);
}
/**
* Logs and re-throws the given exception for RPC responses.
*
* @param t the exception
*
* @throws CmsRpcException the converted exception
*/
public void error(Throwable t) throws CmsRpcException {
logError(t);
throw new CmsRpcException(t);
}
/**
* Returns the current cms context.
*
* @return the current cms context
*/
public CmsObject getCmsObject() {
return m_perThreadCmsObject.get();
}
/**
* Returns the current request.
*
* @return the current request
*
* @see #getThreadLocalRequest()
*/
public HttpServletRequest getRequest() {
return getThreadLocalRequest();
}
/**
* Returns the current response.
*
* @return the current response
*
* @see #getThreadLocalResponse()
*/
public HttpServletResponse getResponse() {
return getThreadLocalResponse();
}
/**
* @see javax.servlet.GenericServlet#log(java.lang.String)
*/
@Override
public void log(String msg) {
if (getResponse() != null) {
super.log(msg);
}
// also log to opencms.log
LOG.info(msg);
}
/**
* @see javax.servlet.GenericServlet#log(java.lang.String, java.lang.Throwable)
*/
@Override
public void log(String message, Throwable t) {
if (getResponse() != null) {
super.log(message, t);
}
// also log to opencms.log
LOG.info(message, t);
}
/**
* Logs the given exception.
*
* @param t the exception to log
*/
public void logError(Throwable t) {
LOG.error(t.getLocalizedMessage(), t);
}
/**
* @see javax.servlet.http.HttpServlet#service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
*/
@Override
public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException {
try {
response.setCharacterEncoding(request.getCharacterEncoding());
super.service(request, response);
} finally {
clearThreadStorage();
}
}
/**
* Sets the current cms context.
*
* @param cms the current cms context to set
*/
public synchronized void setCms(CmsObject cms) {
if (m_perThreadCmsObject == null) {
m_perThreadCmsObject = new ThreadLocal();
}
m_perThreadCmsObject.set(cms);
}
/**
* Sets the service context.
*
* @param context the new service context
*/
public synchronized void setContext(CmsGwtServiceContext context) {
m_context = context;
}
/**
* Sets the current request.
*
* @param request the request to set
*/
public synchronized void setRequest(HttpServletRequest request) {
if (perThreadRequest == null) {
perThreadRequest = new ThreadLocal();
}
perThreadRequest.set(request);
}
/**
* Sets the current response.
*
* @param response the response to set
*/
public synchronized void setResponse(HttpServletResponse response) {
if (perThreadResponse == null) {
perThreadResponse = new ThreadLocal();
}
perThreadResponse.set(response);
}
/**
* Clears the objects stored in thread local.
*/
protected void clearThreadStorage() {
if (m_perThreadCmsObject != null) {
m_perThreadCmsObject.remove();
}
if (perThreadRequest != null) {
perThreadRequest.remove();
}
if (perThreadResponse != null) {
perThreadResponse.remove();
}
}
/**
* We do not want that the server goes to fetch files from the servlet context.
*
* @see com.google.gwt.user.server.rpc.RemoteServiceServlet#doGetSerializationPolicy(javax.servlet.http.HttpServletRequest, java.lang.String, java.lang.String)
*/
@Override
protected SerializationPolicy doGetSerializationPolicy(
HttpServletRequest request,
String moduleBaseURL,
String strongName) {
return m_context.getSerializationPolicy(getCmsObject(), moduleBaseURL, strongName);
}
/**
* @see com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet#doUnexpectedFailure(java.lang.Throwable)
*/
@Override
protected void doUnexpectedFailure(Throwable e) {
LOG.error(String.valueOf(System.currentTimeMillis()), e);
super.doUnexpectedFailure(e);
}
/**
* Locks the given resource with a temporary, if not already locked by the current user.
* Will throw an exception if the resource could not be locked for the current user.
*
* @param resource the resource to lock
*
* @return the assigned lock
*
* @throws CmsException if the resource could not be locked
*/
protected CmsLockActionRecord ensureLock(CmsResource resource) throws CmsException {
CmsObject cms = getCmsObject();
return CmsLockUtil.ensureLock(cms, resource);
}
/**
*
* Locks the given resource with a temporary, if not already locked by the current user.
* Will throw an exception if the resource could not be locked for the current user.
*
* @param structureId the structure id of the resource
*
* @return the assigned lock
*
* @throws CmsException if something goes wrong
*/
protected CmsLockActionRecord ensureLock(CmsUUID structureId) throws CmsException {
return ensureLock(getCmsObject().readResource(structureId, CmsResourceFilter.IGNORE_EXPIRATION));
}
/**
* Locks the given resource with a temporary, if not already locked by the current user.
* Will throw an exception if the resource could not be locked for the current user.
*
* @param sitepath the site-path of the resource to lock
*
* @return the assigned lock
*
* @throws CmsException if the resource could not be locked
*/
protected CmsLockActionRecord ensureLock(String sitepath) throws CmsException {
return ensureLock(getCmsObject().readResource(sitepath, CmsResourceFilter.IGNORE_EXPIRATION));
}
/**
* Ensures that the user session is still valid.
*
* @throws CmsException if the current user is the guest user
*/
protected void ensureSession() throws CmsException {
CmsUser user = getCmsObject().getRequestContext().getCurrentUser();
if (user.isGuestUser()) {
throw new CmsException(Messages.get().container(Messages.ERR_SESSION_EXPIRED_0));
}
}
/**
* Converts a list of properties to a map.
*
* @param properties the list of properties
*
* @return a map from property names to properties
*/
protected Map getPropertiesByName(List properties) {
Map result = new HashMap();
for (CmsProperty property : properties) {
String key = property.getName();
result.put(key, property.clone());
}
return result;
}
/**
* Tries to unlock a resource.
*
* @param resource the resource to unlock
*/
protected void tryUnlock(CmsResource resource) {
try {
getCmsObject().unlockResource(resource);
} catch (CmsException e) {
LOG.debug("Unable to unlock " + resource.getRootPath(), e);
}
}
}