com.opencms.launcher
Class CmsLinkLauncher

java.lang.Object
  |
  +--com.opencms.launcher.A_CmsLauncher
        |
        +--com.opencms.launcher.CmsLinkLauncher

All Implemented Interfaces:

I_CmsConstants, I_CmsLauncher, I_CmsLogChannels

public class CmsLinkLauncher

extends com.opencms.launcher.A_CmsLauncher

OpenCms launcher class for starting template classes implementing the I_CmsDumpTemplate interface. This can be used for plain text files or files containing graphics.

If no other start template class is given, CmsDumpTemplate will be used to create output.

Version:

$Revision: 1.16 $ $Date: 2003/01/20 23:59:23 $

Author:

Michael Emmerich

Field Summary

protected static I_CmsTemplateCache

m_templateCache The template cache that holds all cached templates

Fields inherited from interface com.opencms.launcher.I_CmsLauncher

C_TYPE_DUMP, C_TYPE_JAVASCRIPT, C_TYPE_JSP, C_TYPE_LINK, C_TYPE_PDF, C_TYPE_VELOCITY, C_TYPE_XML

Fields inherited from interface com.opencms.boot.I_CmsLogChannels

C_FLEX_CACHE, C_FLEX_LOADER, C_LOGGING, C_MODULE_CRITICAL, C_MODULE_DEBUG, C_MODULE_INFO, C_OPENCMS_CACHE, C_OPENCMS_CRITICAL, C_OPENCMS_CRONSCHEDULER, C_OPENCMS_DEBUG, C_OPENCMS_ELEMENTCACHE, C_OPENCMS_INFO, C_OPENCMS_INIT, C_OPENCMS_POOL, C_OPENCMS_STATICEXPORT, C_OPENCMS_STREAMING, C_PREPROCESSOR_IS_LOGGING

Fields inherited from interface com.opencms.core.I_CmsConstants

C_ACCESS_DEFAULT_FLAGS, C_ACCESS_GROUP, C_ACCESS_GROUP_READ, C_ACCESS_GROUP_VISIBLE, C_ACCESS_GROUP_WRITE, C_ACCESS_INTERNAL_READ, C_ACCESS_OWNER, C_ACCESS_OWNER_READ, C_ACCESS_OWNER_VISIBLE, C_ACCESS_OWNER_WRITE, C_ACCESS_PUBLIC, C_ACCESS_PUBLIC_READ, C_ACCESS_PUBLIC_VISIBLE, C_ACCESS_PUBLIC_WRITE, C_ACCESS_READ, C_ACCESS_VISIBLE, C_ACCESS_WRITE, C_ADDITIONAL_INFO_EXPLORERSETTINGS, C_ADDITIONAL_INFO_PREFERENCES, C_ADDITIONAL_INFO_STARTSETTINGS, C_ADDITIONAL_INFO_TASKSETTINGS, C_ADDITIONAL_INFO_TOWN, C_ADDITIONAL_INFO_ZIPCODE, C_AT_LEAST_ONCE, C_CLUSTERURL, C_CONFIGURATION_CACHE, C_CONFIGURATION_CLASS, C_CONFIGURATION_REGISTRY, C_CONFIGURATION_RESOURCEBROKER, C_COPYRIGHT, C_DEFAULT_SITE, C_DELETE_HISTORY, C_ENABLE_HISTORY, C_ERRPREFIX, C_ERRSPERATOR, C_EXPORT_TAG_ACCESS, C_EXPORT_TAG_ADDRESS, C_EXPORT_TAG_CREATOR, C_EXPORT_TAG_DATE, C_EXPORT_TAG_DEFAULTGROUP, C_EXPORT_TAG_DESCRIPTION, C_EXPORT_TAG_DESTINATION, C_EXPORT_TAG_EMAIL, C_EXPORT_TAG_EXPORT, C_EXPORT_TAG_FILE, C_EXPORT_TAG_FIRSTNAME, C_EXPORT_TAG_FLAGS, C_EXPORT_TAG_GROUP, C_EXPORT_TAG_GROUPDATA, C_EXPORT_TAG_GROUPNAME, C_EXPORT_TAG_INFO, C_EXPORT_TAG_LASTMODIFIED, C_EXPORT_TAG_LASTNAME, C_EXPORT_TAG_LAUNCHER_START_CLASS, C_EXPORT_TAG_MODULEXPORT, C_EXPORT_TAG_NAME, C_EXPORT_TAG_OC_VERSION, C_EXPORT_TAG_PARENTGROUP, C_EXPORT_TAG_PASSWORD, C_EXPORT_TAG_PROJECT, C_EXPORT_TAG_PROPERTIES, C_EXPORT_TAG_PROPERTY, C_EXPORT_TAG_RECOVERYPASSWORD, C_EXPORT_TAG_SECTION, C_EXPORT_TAG_SOURCE, C_EXPORT_TAG_TYPE, C_EXPORT_TAG_USER, C_EXPORT_TAG_USERDATA, C_EXPORT_TAG_USERGROUPDATA, C_EXPORT_TAG_USERGROUPS, C_EXPORT_TAG_USERINFO, C_EXPORT_TAG_VALUE, C_EXPORT_TAG_VERSION, C_EXPORT_VERSION, C_EXPORT_XMLFILENAME, C_EXPORTONLYFILES, C_EXPORTONLYUSERS, C_EXPORTPOINT, C_EXPORTPOINT_PATH, C_EXPORTUSERSFILES, C_FCONTENT, C_FELEMENT, C_FILE, C_FILECONTENT, C_FILES_IMPORTED, C_FLAG_DISABLED, C_FLAG_ENABLED, C_FLAG_GROUP_PROJECTCOWORKER, C_FLAG_GROUP_PROJECTMANAGER, C_FLAG_GROUP_ROLE, C_FOLDER, C_FOLDER_SEPARATOR, C_GROUP, C_GROUP_ADMIN, C_GROUP_GUEST, C_GROUP_PROJECTLEADER, C_GROUP_USERS, C_LINKCHECKTABLE_DATE, C_MAX_LENGTH_RESOURCE_NAME, C_MODULE_PROPERTY_ADDITIONAL_RESOURCES, C_MODULE_PROPERTY_ADDITIONAL_RESOURCES_SEPARATOR, C_MODUS_AUTO, C_MODUS_EXPORT, C_MODUS_EXTERN, C_MODUS_OFFLINE, C_MODUS_ONLINE, C_MOUNTPOINT_FILESYSTEM, C_MOUNTPOINT_MYSQL, C_NEVER, C_NO_FILES_IMPORTED, C_ORDER_AGENTUSER, C_ORDER_ENDTIME, C_ORDER_ID, C_ORDER_INITIATORUSER, C_ORDER_NAME, C_ORDER_ORIGINALUSER, C_ORDER_PERCENTAGE, C_ORDER_PRIORITY, C_ORDER_ROLE, C_ORDER_STARTTIME, C_ORDER_STATE, C_ORDER_TASKTYPE, C_ORDER_TIMEOUT, C_ORDER_WAKEUPTIME, C_PASSWORD_MINIMUMSIZE, C_PROJECT_ONLINE, C_PROJECT_ONLINE_ID, C_PROJECT_STATE_ARCHIVE, C_PROJECT_STATE_INVISIBLE, C_PROJECT_STATE_LOCKED, C_PROJECT_STATE_UNLOCKED, C_PROJECT_TYPE_INVISIBLE, C_PROJECT_TYPE_NORMAL, C_PROJECT_TYPE_TEMPORARY, C_PROPERTY_ACTIV, C_PROPERTY_CHANNELID, C_PROPERTY_CONTENT_ENCODING, C_PROPERTY_DEFAULT_FILE, C_PROPERTY_DESCRIPTION, C_PROPERTY_EXPORT, C_PROPERTY_EXPORTNAME, C_PROPERTY_KEYWORDS, C_PROPERTY_NAVPOS, C_PROPERTY_NAVTEXT, C_PROPERTY_RELATIVEROOT, C_PROPERTY_TEMPLATETYPE, C_PROPERTY_TITLE, C_PROPERTY_VISIBLE, C_PUBLISH_METHOD_LINK, C_REGISTRY_DESTINATION, C_REGISTRY_HISTORY, C_REGISTRY_KNOWNLAUNCHERS, C_REGISTRY_LAUNCHER, C_REGISTRY_SOURCE, C_REQUEST_CONSOLE, C_REQUEST_HTTP, C_RESPONSE_CONSOLE, C_RESPONSE_HTTP, C_ROOT, C_ROOT_TEMPLATE_NAME, C_ROOTNAME_COS, C_ROOTNAME_VFS, C_SESSION_ADMIN_POS, C_SESSION_BROADCASTMESSAGE, C_SESSION_CONTENT_ENCODING, C_SESSION_CURRENTGROUP, C_SESSION_DATA, C_SESSION_IS_DIRTY, C_SESSION_MESSAGEPENDING, C_SESSION_MODULE_VECTOR, C_SESSION_PROJECT, C_SESSION_THREAD_ERROR, C_SESSION_USERNAME, C_SORT_ASC, C_SORT_DESC, C_START_ACCESSFLAGS, C_START_DEFAULTGROUP, C_START_LANGUAGE, C_START_LOCKDIALOG, C_START_PROJECT, C_START_VIEW, C_STATE_CHANGED, C_STATE_DELETED, C_STATE_NEW, C_STATE_UNCHANGED, C_STATICEXPORT_PATH, C_STATICEXPORT_START, C_SYNCHRONISATION_PATH, C_SYNCHRONISATION_PROJECT, C_SYNCHRONISATION_RESOURCE, C_SYNCHRONISATION_RESOURCETAG, C_SYSTEMPROPERTY_CRONTABLE, C_SYSTEMPROPERTY_EXPORTPATH, C_SYSTEMPROPERTY_EXTENSIONS, C_SYSTEMPROPERTY_LINKCHECKTABLE, C_SYSTEMPROPERTY_MIMETYPES, C_SYSTEMPROPERTY_MOUNTPOINT, C_SYSTEMPROPERTY_RESOURCE_TYPE, C_TABLE_CHANNELID, C_TASK_FILTER, C_TASK_MESSAGES, C_TASK_MESSAGES_ACCEPTED, C_TASK_MESSAGES_COMPLETED, C_TASK_MESSAGES_FORWARDED, C_TASK_MESSAGES_MEMBERS, C_TASK_ORDER_BY_DATE, C_TASK_ORDER_BY_NAME, C_TASK_PRIORITY_HIGH, C_TASK_PRIORITY_LOW, C_TASK_PRIORITY_NORMAL, C_TASK_STATE_ENDED, C_TASK_STATE_HALTED, C_TASK_STATE_NOTENDED, C_TASK_STATE_PREPARE, C_TASK_STATE_START, C_TASK_STATE_STARTED, C_TASK_VIEW_ALL, C_TASKLOG_SYSTEM, C_TASKLOG_USER, C_TASKORDER_NONE, C_TASKORDER_STARTDATE, C_TASKORDER_TIMEOUT, C_TASKS_ACTIVE, C_TASKS_ALL, C_TASKS_DONE, C_TASKS_NEW, C_TASKS_OPEN, C_TASKSORDER_TASKNAME, C_TEMP_PREFIX, C_TFACCESS, C_TFGROUP, C_TFILEOBJ, C_TFILES, C_TFNAME, C_TFPROPERTYINFO, C_TFPROPERTYNAME, C_TFPROPERTYTYPE, C_TFPROPERTYVALUE, C_TFTYPE, C_TFTYPENAME, C_TFUSER, C_TGDESC, C_TGFLAG, C_TGNAME, C_TGPARENTGROUP, C_TGROUPOBJ, C_TGROUPS, C_TGROUPUSERS, C_TGUSER, C_TUADDINFO, C_TUDESC, C_TUDGROUP, C_TUDISABLED, C_TUEMAIL, C_TUFIRSTNAME, C_TUFLAG, C_TUGROUP, C_TUINFOKEY, C_TUINFOVALUE, C_TULOGIN, C_TUNAME, C_TUPASSWD, C_TUSERGROUPS, C_TUSEROBJ, C_TUSERS, C_TYPE_BODY_NAME, C_TYPE_COMPATIBLEPLAIN_NAME, C_TYPE_FOLDER, C_TYPE_FOLDER_NAME, C_TYPE_IMAGE_NAME, C_TYPE_LAST_INDEX, C_TYPE_PAGE_NAME, C_TYPE_PLAIN_NAME, C_UNKNOWN_ID, C_UNKNOWN_INT, C_UNKNOWN_LAUNCHER, C_UNKNOWN_LAUNCHER_ID, C_UNKNOWN_LONG, C_URL_PREFIX_EXPORT, C_URL_PREFIX_HTTP, C_URL_PREFIX_HTTPS, C_URL_PREFIX_SERVERNAME, C_USER, C_USER_ADMIN, C_USER_GUEST, C_USER_TYPE_SYSTEMANDWEBUSER, C_USER_TYPE_SYSTEMUSER, C_USER_TYPE_WEBUSER, C_WEB_APP_REPLACE_KEY, C_WEEKS_HISTORY, C_WHATEVER, C_XML_BODY_ELEMENT

Constructor Summary

CmsLinkLauncher()

Method Summary

protected byte[]	callCanonicalRoot(CmsObject cms, I_CmsTemplate templateClass, CmsFile masterTemplate, Hashtable parameters) Utility method used by the launcher implementation to give control to the CanonicalRoot.
void	clearCache() Method for clearing this launchers template cache.
static void	clearLauncherCache(CmsObject cms) Clear the XML template cache that is maintained in the launcher.
protected String	getClassName() Gets the name of the class in the form "[ClassName] " This can be used for error logging purposes.
int	getLauncherId() Gets the ID that indicates the type of the launcher.
static I_CmsTemplateCache	getTemplateCache() Gets a reference to the global template cache
protected I_CmsTemplate	getTemplateClass(CmsObject cms, String classname) Calls the CmsClassManager to get an instance of the given template class.
void	handleException(CmsObject cms, Exception e, String errorText) Utility method to handle any occurence of an execption.
void	initlaunch(CmsObject cms, CmsFile file, String startTemplateClass, A_OpenCms openCms) Start method called by the OpenCms system to show a resource.
protected void	launch(CmsObject cms, CmsFile file, String startTemplateClass, A_OpenCms openCms) Unitary method to start generating the output.
void	setOpenCms(A_OpenCms openCms) Sets the currently running OpenCms instance.
protected void	writeBytesToResponse(CmsObject cms, byte[] result) Writes a given byte array to the HttpServletRespose output stream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

m_templateCache

protected static I_CmsTemplateCache m_templateCache

The template cache that holds all cached templates

Constructor Detail

CmsLinkLauncher

public CmsLinkLauncher()

Method Detail

getLauncherId

public int getLauncherId()

Gets the ID that indicates the type of the launcher.

Specified by:

getLauncherId in interface I_CmsLauncher

Specified by:

getLauncherId in class com.opencms.launcher.A_CmsLauncher

Returns:

launcher ID

launch

protected void launch(CmsObject cms,
                      CmsFile file,
                      String startTemplateClass,
                      A_OpenCms openCms)
               throws CmsException

Unitary method to start generating the output. Every launcher has to implement this method. In it possibly the selected file will be analyzed, and the Canonical Root will be called with the appropriate template class, template file and parameters. At least the canonical root's output must be written to the HttpServletResponse.

Specified by:

launch in class com.opencms.launcher.A_CmsLauncher

Parameters:

cms - CmsObject Object for accessing system resources

file - CmsFile Object with the selected resource to be shown

startTemplateClass - Name of the template class to start with.

openCms - a instance of A_OpenCms for redirect-needs

Throws:

CmsException

setOpenCms

public void setOpenCms(A_OpenCms openCms)

Sets the currently running OpenCms instance.

Specified by:

setOpenCms in interface I_CmsLauncher

Overrides:

setOpenCms in class com.opencms.launcher.A_CmsLauncher

callCanonicalRoot

protected byte[] callCanonicalRoot(CmsObject cms,
                                   I_CmsTemplate templateClass,
                                   CmsFile masterTemplate,
                                   Hashtable parameters)
                            throws CmsException

Utility method used by the launcher implementation to give control to the CanonicalRoot. The CanonicalRoot will call the master template and return a byte array of the generated output.

Parameters:

cms - CmsObject Object for accessing system resources.

templateClass - Class that should generate the output of the master template.

masterTemplate - CmsFile Object with masterTemplate for the output.

parameters - Hashtable with all parameters for the template class.

Returns:

byte array with the generated output or null if there were errors.

Throws:

CmsException

clearCache

public void clearCache()

Method for clearing this launchers template cache.

Specified by:

clearCache in interface I_CmsLauncher

getClassName

protected String getClassName()

Gets the name of the class in the form "[ClassName] " This can be used for error logging purposes.

Returns:

name of this class

getTemplateCache

public static I_CmsTemplateCache getTemplateCache()

Gets a reference to the global template cache

Returns:

Template cache

getTemplateClass

protected I_CmsTemplate getTemplateClass(CmsObject cms,
                                         String classname)
                                  throws CmsException

Calls the CmsClassManager to get an instance of the given template class. The returned object is checked to be an implementing class of the interface I_CmsTemplate. If the template cache of the template class is not yet setted, this will be done, too.

Parameters:

cms - CmsObject object for accessing system resources.

classname - Name of the requested template class.

Returns:

Instance of the template class.

Throws:

CmsException.

CmsException

handleException

public void handleException(CmsObject cms,
                            Exception e,
                            String errorText)
                     throws CmsException

Utility method to handle any occurence of an execption.

If the Exception is NO CmsException (i.e. it was not detected previously) it will be written to the logfile.

If the current user is the anonymous user, no further execption will be thrown, but a server error will be sent (we want to prevent the user from seeing any exeptions). Otherwise a new Exception will be thrown.

Parameters:

cms - CmsObject Object for accessing system resources.

e - Exception that should be handled.

errorText - Error message that should be shown.

Throws:

CmsException

initlaunch

public void initlaunch(CmsObject cms,
                       CmsFile file,
                       String startTemplateClass,
                       A_OpenCms openCms)
                throws CmsException

Start method called by the OpenCms system to show a resource.

In this method initial values valid for all launchers can be set and the _clearcache parameter is checked. After this the abstract method launch(...) is called to invoke the customized part of the launcher.

Specified by:

initlaunch in interface I_CmsLauncher

Parameters:

cms - CmsObject Object for accessing system resources.

file - CmsFile Object with the selected resource to be shown.

startTemplateClass - Name of the template class to start with.

openCms - a instance of A_OpenCms for redirect-needs

Throws:

CmsException

clearLauncherCache

public static void clearLauncherCache(CmsObject cms)

Clear the XML template cache that is maintained in the launcher. To use this method, call it on one of the classes that extend A_CmsLauncher (e.g. com.opencms.launcher.CmsXmlLauncher.clearLauncherCache()).

Parameters:

cms - an initialized CmsObject

writeBytesToResponse

protected void writeBytesToResponse(CmsObject cms,
                                    byte[] result)
                             throws CmsException

Writes a given byte array to the HttpServletRespose output stream.

Parameters:

result - byte array that should be written.

Throws:

CmsException