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NIFI-916 Refactoring how the closed flag is used in PersistentProvenanceRepository to ensure proper shutdown

This commit is contained in:
Bryan Bende 2015-09-01 14:34:25 -04:00
parent 72ccc252fe
commit 85534ca860
1 changed files with 10 additions and 4 deletions
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14
nifi-nar-bundles/nifi-provenance-repository-bundle/nifi-persistent-provenance-repository/src/main/java/org/apache/nifi/provenance/PersistentProvenanceRepository.java
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@ -124,7 +124,7 @@ public class PersistentProvenanceRepository implements ProvenanceEventRepository
private final AtomicReference<SortedMap<Long, Path>> idToPathMap = new AtomicReference<>();
private final AtomicBoolean recoveryFinished = new AtomicBoolean(false);
private volatile boolean closed = false;
private final AtomicBoolean closed = new AtomicBoolean(false);
private volatile long firstEventTimestamp = 0L;
// the following are all protected by the lock
@ -630,11 +630,11 @@ public class PersistentProvenanceRepository implements ProvenanceEventRepository
@Override
public synchronized void close() throws IOException {
this.closed.set(true);
writeLock.lock();
try {
logger.debug("Obtained write lock for close");
this.closed = true;
scheduledExecService.shutdownNow();
rolloverExecutor.shutdownNow();
queryExecService.shutdownNow();
@ -652,7 +652,7 @@ public class PersistentProvenanceRepository implements ProvenanceEventRepository
}
public boolean isShutdownComplete() {
return this.closed;
return this.closed.get();
}
private void persistRecord(final Iterable<ProvenanceEventRecord> records) {
@ -1269,6 +1269,12 @@ public class PersistentProvenanceRepository implements ProvenanceEventRepository
+ "exceeding the provenance recording rate. Slowing down flow to accommodate");
while (journalFileCount > journalCountThreshold || repoSize > sizeThreshold) {
// if a shutdown happens while we are in this loop, kill the rollover thread and break
if (this.closed.get()) {
future.cancel(true);
break;
}
if (repoSize > sizeThreshold) {
logger.debug("Provenance Repository has exceeded its size threshold; will trigger purging of oldest events");
purgeOldEvents();
@ -1397,7 +1403,7 @@ public class PersistentProvenanceRepository implements ProvenanceEventRepository
*/
File mergeJournals(final List<File> journalFiles, final File suggestedMergeFile, final EventReporter eventReporter) throws IOException {
logger.debug("Merging {} to {}", journalFiles, suggestedMergeFile);
if ( this.closed ) {
if ( this.closed.get() ) {
logger.info("Provenance Repository has been closed; will not merge journal files to {}", suggestedMergeFile);
return null;
}