@Override
public void afterCreateVersion(NodeRef versionableNode, Version version) {
VersionHistory versionHistory = versionService.getVersionHistory(versionableNode);
if (maxVersions == 0) {
logger.debug("alvexMaxVersionPolicy is disabled");
return;
}
if (versionHistory == null) {
logger.debug("versionHistory does not exist");
}
logger.debug("Current number of versions: " + versionHistory.getAllVersions().size());
// If the current number of versions in the VersionHistory is greater
// than the maxVersions limit, remove the least recent versions
while (versionHistory.getAllVersions().size() > maxVersions) {
logger.debug("Removing Version: " + versionHistory.getRootVersion().getVersionLabel());
versionService.deleteVersion(versionableNode, versionHistory.getRootVersion());
versionHistory = versionService.getVersionHistory(versionableNode);
}
}
@Override
protected Map<String, Object> executeImpl(
SiteInfo site,
String pageTitle,
WebScriptRequest req,
JSONObject json,
Status status,
Cache cache) {
Map<String, Object> model = new HashMap<>();
// Grab the version string
Map<String, String> templateVars = req.getServiceMatch().getTemplateVars();
String versionId = templateVars.get("versionId");
if (versionId == null) {
String error = "No versionId supplied";
throw new WebScriptException(Status.STATUS_BAD_REQUEST, error);
}
// Try to find the page
WikiPageInfo page = wikiService.getWikiPage(site.getShortName(), pageTitle);
if (page == null) {
String message = "The Wiki Page could not be found";
status.setCode(Status.STATUS_NOT_FOUND);
status.setMessage(message);
// Return an empty string though
model.put(PARAM_CONTENT, "");
return model;
}
// Fetch the version history for the node
VersionHistory versionHistory = null;
Version version = null;
try {
versionHistory = versionService.getVersionHistory(page.getNodeRef());
} catch (AspectMissingException e) {
}
if (versionHistory == null) {
// Not been versioned, return an empty string
model.put(PARAM_CONTENT, "");
return model;
}
// Fetch the version by either ID or Label
Matcher m = LABEL_PATTERN.matcher(versionId);
if (m.matches()) {
// It's a version label like 2.3
try {
version = versionHistory.getVersion(versionId);
} catch (VersionDoesNotExistException e) {
}
} else {
// It's a version ID like ed00bac1-f0da-4042-8598-45a0d39cb74d
// (The ID is usually part of the NodeRef of the frozen node, but we
// don't assume to be able to just generate the full NodeRef)
for (Version v : versionHistory.getAllVersions()) {
if (v.getFrozenStateNodeRef().getId().equals(versionId)) {
version = v;
}
}
}
// Did we find the right version in the end?
String contents;
if (version != null) {
ContentReader reader =
contentService.getReader(version.getFrozenStateNodeRef(), ContentModel.PROP_CONTENT);
if (reader != null) {
contents = reader.getContentString();
} else {
// No content was stored in the version history
contents = "";
}
} else {
// No warning of the missing version, just return an empty string
contents = "";
}
// All done
model.put(PARAM_CONTENT, contents);
model.put("page", page);
model.put("site", site);
model.put("siteId", site.getShortName());
return model;
}