@Override
public void install(LocalExtension localExtension, String namespace) throws InstallException {
ExtensionURLClassLoader classLoader =
this.jarExtensionClassLoader.getURLClassLoader(namespace, true);
// 1) load jar into classloader
try {
classLoader.addURL(localExtension.getFile().toURI().toURL());
} catch (MalformedURLException e) {
throw new InstallException("Failed to load jar file", e);
}
// 2) load and register components
loadComponents(localExtension.getFile(), classLoader);
}
// TODO: support question/answer with the UI to resolve conflicts
@Override
public void upgrade(
LocalExtension previousLocalExtension, LocalExtension newLocalExtension, String namespace)
throws InstallException {
// TODO
// 1) find all modified pages between old and new version
// 2) compare old version and wiki (to find pages modified by user)
// 3) delete pages removed in new version (even if modified ?)
// 4) merge xar
// 4.1) merge modified pages in wiki with diff between old/new version
// 4.2) update unmodified pages different between old and new version
// CURRENT
XarLocalExtension previousXarExtension;
try {
previousXarExtension =
(XarLocalExtension) this.xarRepository.resolve(previousLocalExtension.getId());
} catch (ResolveException e) {
// Not supposed to be possible
throw new InstallException(
"Failed to get xar extension ["
+ previousLocalExtension.getId()
+ "] from xar repository",
e);
}
// Install new pages
install(previousXarExtension, newLocalExtension, namespace);
// Uninstall old version pages not anymore in the new version
Set<XarEntry> previousPages = new HashSet<XarEntry>(previousXarExtension.getPages());
List<XarEntry> newPages;
try {
XarLocalExtension newXarExtension =
(XarLocalExtension) this.xarRepository.resolve(newLocalExtension.getId());
newPages = newXarExtension.getPages();
} catch (ResolveException e) {
try {
newPages =
this.packager.getEntries(new File(newLocalExtension.getFile().getAbsolutePath()));
} catch (IOException e1) {
throw new InstallException(
"Failed to get xar extension [" + newLocalExtension.getId() + "] pages", e);
}
}
for (XarEntry entry : newPages) {
previousPages.remove(entry);
}
try {
this.packager.unimportPages(previousPages, namespace);
} catch (Exception e) {
this.logger.warn(
"Exception when cleaning pages removed since previous xar extension version", e);
}
}
@Override
public void uninstall(LocalExtension localExtension, String namespace) throws UninstallException {
ExtensionURLClassLoader classLoader =
this.jarExtensionClassLoader.getURLClassLoader(namespace, false);
if (namespace == null || classLoader.getWiki().equals(namespace)) {
// unregister components
unloadComponents(localExtension.getFile(), classLoader);
// TODO: find a way to unload the jar from the classloader
}
}
public void install(
XarLocalExtension previousExtension, LocalExtension localExtension, String wiki)
throws InstallException {
// TODO: should be configurable
MergeConfiguration mergeConfiguration = new MergeConfiguration();
// import xar into wiki (add new version when the page already exists)
try {
this.packager.importXAR(
previousExtension != null
? new XarFile(
new File(previousExtension.getFile().getAbsolutePath()),
previousExtension.getPages())
: null,
new File(localExtension.getFile().getAbsolutePath()),
wiki,
mergeConfiguration);
} catch (Exception e) {
throw new InstallException("Failed to import xar for extension [" + localExtension + "]", e);
}
}