Package org.opencms.db

Class CmsTempFolderExportPointDriver

java.lang.Object

org.opencms.db.CmsExportPointDriver

org.opencms.db.CmsTempFolderExportPointDriver

All Implemented Interfaces:

I_CmsExportPointDriver

public class CmsTempFolderExportPointDriver
extends CmsExportPointDriver

An alternative export point driver which replaces the RFS targets of some export points with locations in a temporary export folder. This is designed specifically for export points which map to WEB-INF/lib and WEB-INF/classes. The problem with these is that replacing jar files or classes does not work at runtime. If these files are written to a temp folder (which is not picked up by the servlet coontainer's class loader) instead, an external script can be used to update the actual export point locations based on the temp folder while the servlet container is stopped. Since the script needs to know which files to delete in the 'real' (not temporary) export point locations, deletions of files which are mapped to the temp export point folder are not handled by deleting the files in that folder, but rather by replacing them with "dummy" files containing a specific marker string (which is contained in the DELETE_MARKER variable), so the script that updates the 'real' folder needs to delete files if it comes across a file starting with that marker string.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DELETE_MARKER	The content to be used for dummy files in the temporary export point folders which represent deleted files.
protected static byte[]	DELETE_MARKER_BYTES	The byte array used to mark files as deleted.
static final String	TEMP_EXPORTPOINT_FOLDER	The temp folder for export points.

Fields inherited from class org.opencms.db.CmsExportPointDriver

m_exportpointLookupMap, m_exportpoints

Constructor Summary

Constructors

Constructor	Description
CmsTempFolderExportPointDriver(Set<CmsExportPoint> exportpoints, List<String> tempFolderDestinations)	Constructor for a CmsExportPointDriver.

Method Summary

Modifier and Type	Method	Description
void	deleteResource(String resourceName, String exportpoint)	Deletes a file or a folder in the real file sytem.
void	writeFile(String resourceName, String exportpoint, byte[] content)	Writes the file with the given root path to the real file system.

Methods inherited from class org.opencms.db.CmsExportPointDriver

createFolder, getExportPoint, getExportPointFile, getExportPointPaths, writeResource, writeResource

Methods inherited from class java.lang.Object

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

Field Details

DELETE_MARKER

public static final String DELETE_MARKER

The content to be used for dummy files in the temporary export point folders which represent deleted files.

See Also:

• Constant Field Values

DELETE_MARKER_BYTES

protected static byte[] DELETE_MARKER_BYTES

The byte array used to mark files as deleted.

TEMP_EXPORTPOINT_FOLDER

public static final String TEMP_EXPORTPOINT_FOLDER

The temp folder for export points.

See Also:

• Constant Field Values

Constructor Details

CmsTempFolderExportPointDriver

public CmsTempFolderExportPointDriver(Set<CmsExportPoint> exportpoints,
 List<String> tempFolderDestinations)

Constructor for a CmsExportPointDriver.

Parameters:

exportpoints - the list of export points

tempFolderDestinations - the export point destinations (relative to the web application folder) which should be replaced with

Method Details

deleteResource

public void deleteResource(String resourceName,
 String exportpoint)

Description copied from class: CmsExportPointDriver

Deletes a file or a folder in the real file sytem.

If the given resource name points to a folder, then this folder is only deleted if it is empty. This is required since the same export point RFS target folder may be used by multiple export points. For example, this is usually the case with the /WEB-INF/classes/ and /WEB-INF/lib/ folders which are export point for multiple modules. If all resources in the RFS target folder where deleted, uninstalling one module would delete the export classes and lib resources of all other modules.

Specified by:

deleteResource in interface I_CmsExportPointDriver

Overrides:

deleteResource in class CmsExportPointDriver

Parameters:

resourceName - the root path of the resource to be deleted

exportpoint - the name of the export point

See Also:

• I_CmsExportPointDriver.deleteResource(java.lang.String, java.lang.String)

writeFile

public void writeFile(String resourceName,
 String exportpoint,
 byte[] content)

Description copied from class: CmsExportPointDriver

Writes the file with the given root path to the real file system.

If required, missing parent folders in the real file system are automatically created.

Specified by:

writeFile in interface I_CmsExportPointDriver

Overrides:

writeFile in class CmsExportPointDriver

Parameters:

resourceName - the root path of the file to write

exportpoint - the export point to write file to

content - the contents of the file to write

See Also:

• CmsExportPointDriver.writeFile(java.lang.String, java.lang.String, byte[])