@Override
public void executeHardThresholdAction(final String message) {
final String subject =
"HARD Threshold limit reached for: LogEventMisuseHandler -- Log Data Requests too large";
EmailCommunicationMessage e =
new EmailCommunicationMessage(
null,
properties.getProperty(Constants.SERVER_ADMIN_ADDRESS),
subject,
message,
message,
EmailType.ADMIN,
null,
null);
try {
emailManager.addSystemEmailToQueue(e);
} catch (SegueDatabaseException e1) {
log.error(
"Database access error when attempting to send hard threshold limit warnings: "
+ e1.getMessage());
}
log.warn("Hard threshold limit reached for LoginMisuseHandler: " + message);
}
/**
* This method should use the configuration settings to maintain the cache of the content manager
* object.
*
* @param versionJustIndexed - the version we just indexed.
*/
public synchronized void cleanupCache(final String versionJustIndexed) {
int maxCacheSize = Integer.parseInt(properties.getProperty(Constants.MAX_VERSIONS_TO_CACHE));
// clean up task queue
for (Future<?> future : this.indexQueue) {
if (future.isDone() || future.isCancelled()) {
this.indexQueue.remove(future);
}
}
log.info("Index job queue currently of size (" + this.indexQueue.size() + ")");
// first check if our cache is bigger than we want it to be
if (contentManager.getCachedVersionList().size() > maxCacheSize) {
log.info(
"Cache is too full ("
+ contentManager.getCachedVersionList().size()
+ ") finding and deleting old versions");
// Now we want to decide which versions we can safely get rid of.
List<String> allCachedVersions = Lists.newArrayList(contentManager.getCachedVersionList());
// sort them so they are in ascending order with the oldest version first.
Collections.sort(
allCachedVersions,
new Comparator<String>() {
@Override
public int compare(final String arg0, final String arg1) {
return contentManager.compareTo(arg0, arg1);
}
});
for (String version : allCachedVersions) {
// we want to stop when we have deleted enough.
if (contentManager.getCachedVersionList().size() <= maxCacheSize) {
log.info("Cache clear complete");
break;
}
// check we are not deleting the version that is currently
// in use before we delete it.
if (!isVersionInUse(version) && !versionJustIndexed.equals(version)) {
log.info("Requesting to delete the content at version " + version + " from the cache.");
contentManager.clearCache(version);
}
}
// we couldn't free up enough space
if (contentManager.getCachedVersionList().size() > maxCacheSize) {
log.warn(
"Warning unable to reduce cache to target size: current cache size is "
+ contentManager.getCachedVersionList().size());
}
} else {
log.info(
"Not evicting cache as we have enough space: current cache size is "
+ contentManager.getCachedVersionList().size()
+ ".");
}
}
/**
* This method is intended to be used by Synchronisation jobs to inform the controller that they
* have completed their work.
*
* @param version the version that has just been indexed.
* @param success - whether or not the job completed successfully.
*/
public synchronized void syncJobCompleteCallback(final String version, final boolean success) {
// this job is about to complete so remove it from the queue.
this.indexQueue.remove();
// for use by ContentSynchronisationWorkers to alert the controller that
// they have finished
if (!success) {
log.error(
String.format(
"ContentSynchronisationWorker reported a failure to synchronise %s. Giving up...",
version));
return;
}
// verify that the version is indeed cached
if (!contentManager.getCachedVersionList().contains(version)) {
// if not just return without doing anything.
log.error(
"Sync job informed version controller "
+ "that a version was ready and it lied. The version is no longer cached. "
+ "Terminating sync job.");
return;
}
// Decide if we have to update the live version or not.
if (Boolean.parseBoolean(properties.getProperty(Constants.FOLLOW_GIT_VERSION))) {
// if we are in FOLLOW_GIT_VERSION mode then we do have to try to update.
// acquire the lock for an atomic update
synchronized (liveVersion) {
// set it to the live version only if it is newer than the
// current live version OR if the current live version no-longer
// exists (a rebase might have happened, for example).
boolean newer;
try {
newer = contentManager.compareTo(version, this.getLiveVersion()) > 0;
} catch (NotFoundException e) {
// The current live version was not found. A rebase probably happened underneath us.
log.info(
"Failed to find current live version, someone probably rebased and force-pushed. Tut tut.");
newer = true;
}
if (newer) {
this.setLiveVersion(version);
} else {
log.info(
"Not changing live version as part of sync job as the "
+ "version ("
+ version
+ ") just indexed is older than (or the same as) the current one ("
+ this.getLiveVersion()
+ ").");
}
}
cleanUpTheIndexQueue();
} else {
// we don't want to change the latest version until told to do so.
log.info(
"New content version "
+ version
+ " indexed and available. Not changing liveVersion of the "
+ "site until told to do so.");
}
if (success) {
this.cleanupCache(version);
}
log.debug("Sync job completed - callback received and finished.");
}
