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Implement 'best effort' deletion

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This commit is contained in:
Eugene Livis 2022-04-21 16:16:01 -04:00
parent 0527d3c62e
commit 1252022a41
1 changed files with 38 additions and 8 deletions
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34
Experimental/src/org/sleuthkit/autopsy/experimental/autoingest/DeleteCaseTask.java
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@ -61,16 +61,41 @@ import org.sleuthkit.datamodel.TskCoreException;
*/
public final class DeleteCaseTask implements Runnable {
private static final int MANIFEST_FILE_LOCKING_TIMEOUT_MINS = 1; // ELTODO
private static final int MANIFEST_FILE_LOCKING_TIMEOUT_MINS = 1;
private static final int MANIFEST_DELETE_TRIES = 3;
private static final Logger logger = AutoIngestDashboardLogger.getLogger();
private final CaseNodeData caseNodeData;
private final DeleteOptions deleteOption;
private final ProgressIndicator progress;
private final boolean bestEffortDeletion;
private final List<ManifestFileLock> manifestFileLocks;
private CoordinationService coordinationService;
private CaseMetadata caseMetadata;
/**
* Constructs a task that deletes part or all of a given case.Note that all
* logging is directed to the dedicated auto ingest dashboard log instead of
* to the general application log.
*
* @param caseNodeData The case directory coordination service node data for
* the case.
* @param deleteOption The deletion option for the task.
* @param progress A progress indicator.
* @param bestEffortDeletion A flag whether manifest/input deletion is "best
* effort". If the flag is set to true, then we will delete all manifest
* files for which we are able to get exclusive lock, and leave behind all
* manifest files and data sources for which we were unable to get exclusive
* lock. If the flag is set to false, then the algorithm will abort and exit
* unless it is able to get exclusive lock on all of the manifest files.
*/
public DeleteCaseTask(CaseNodeData caseNodeData, DeleteOptions deleteOption, ProgressIndicator progress, boolean bestEffortDeletion) {
this.caseNodeData = caseNodeData;
this.deleteOption = deleteOption;
this.progress = progress;
this.bestEffortDeletion = bestEffortDeletion;
manifestFileLocks = new ArrayList<>();
}
/**
* Constructs a task that deletes part or all of a given case.Note that all
* logging is directed to the dedicated auto ingest dashboard log instead of
@ -85,6 +110,7 @@ public final class DeleteCaseTask implements Runnable {
this.caseNodeData = caseNodeData;
this.deleteOption = deleteOption;
this.progress = progress;
this.bestEffortDeletion = false; //abort and exit unless we get exclusive lock on all of the manifest files.
manifestFileLocks = new ArrayList<>();
}
@ -147,6 +173,8 @@ public final class DeleteCaseTask implements Runnable {
coordinationService = CoordinationService.getInstance();
checkForCancellation();
// ELTODO Reduce amount of INFO logging
/*
* Acquire an exclusive case name lock. The case name lock is the lock
* that auto ingest node (AIN) job processing tasks acquire exclusively
@ -361,12 +389,14 @@ public final class DeleteCaseTask implements Runnable {
if (null != manifestLock) {
manifestFileLocks.add(new ManifestFileLock(manifestPath, manifestLock));
} else {
logger.log(Level.INFO, String.format("Failed to exclusively lock the manifest %s because it was already held by another host", manifestPath, caseNodeData.getDisplayName()));
logger.log(Level.WARNING, String.format("Failed to exclusively lock the manifest %s because it was already held by another host", manifestPath, caseNodeData.getDisplayName()));
if (!bestEffortDeletion) {
allLocksAcquired = false;
releaseManifestFileLocks();
break;
}
}
}
} catch (CoordinationServiceException | InterruptedException ex) {
releaseManifestFileLocks();
throw ex;