private void assertEnvIsLocked() {
if (!closed.get() && locks != null) {
for (Lock lock : locks) {
try {
lock.ensureValid();
} catch (IOException e) {
logger.warn("lock assertion failed", e);
throw new IllegalStateException("environment is not locked", e);
}
}
}
}
private boolean assertEnvIsLocked() {
if (!closed.get() && locks != null) {
for (Lock lock : locks) {
try {
assert lock.isLocked() : "Lock: " + lock + "is not locked";
} catch (IOException e) {
logger.warn("lock assertion failed", e);
return false;
}
}
}
return true;
}
@Override
public void close() {
if (closed.compareAndSet(false, true) && locks != null) {
for (Lock lock : locks) {
try {
logger.trace("releasing lock [{}]", lock);
lock.close();
} catch (IOException e) {
logger.trace("failed to release lock [{}]", e, lock);
}
}
}
}
private boolean assertEnvIsLocked() {
if (!closed.get() && locks != null) {
for (Lock lock : locks) {
try {
lock.ensureValid();
} catch (IOException e) {
logger.warn("lock assertion failed", e);
return false;
}
}
}
return true;
}
@Override
public void close() {
if (closed.compareAndSet(false, true) && locks != null) {
for (Lock lock : locks) {
try {
logger.trace("releasing lock [{}]", lock);
lock.close();
} catch (IOException e) {
logger.trace(
(Supplier<?>) () -> new ParameterizedMessage("failed to release lock [{}]", lock), e);
}
}
}
}
public GeoOnlyIndexer(GeoSearchConfig config, Directory directory, String indexName)
throws IOException {
this.config = config;
this.directory = directory;
this.indexName = indexName;
lock = directory.makeLock(indexName);
if (!lock.obtain()) {
throw new LockObtainFailedException("Index locked for write: " + indexName);
}
}
/**
* Tries to acquire the WriteLock on this directory. this method is only valid if this IndexReader
* is directory owner.
*
* @throws StaleReaderException if the index has changed since this reader was opened
* @throws CorruptIndexException if the index is corrupt
* @throws org.apache.lucene.store.LockObtainFailedException if another writer has this index open
* (<code>write.lock</code> could not be obtained)
* @throws IOException if there is a low-level IO error
*/
@Override
protected void acquireWriteLock()
throws StaleReaderException, CorruptIndexException, LockObtainFailedException, IOException {
if (readOnly) {
// NOTE: we should not reach this code w/ the core
// IndexReader classes; however, an external subclass
// of IndexReader could reach this.
ReadOnlySegmentReader.noWrite();
}
if (segmentInfos != null) {
ensureOpen();
if (stale)
throw new StaleReaderException(
"IndexReader out of date and no longer valid for delete, undelete, or setNorm operations");
if (writeLock == null) {
Lock writeLock = directory.makeLock(IndexWriter.WRITE_LOCK_NAME);
if (!writeLock.obtain(IndexWriterConfig.WRITE_LOCK_TIMEOUT)) // obtain write lock
throw new LockObtainFailedException("Index locked for write: " + writeLock);
this.writeLock = writeLock;
// we have to check whether index has changed since this reader was opened.
// if so, this reader is no longer valid for
// deletion
if (SegmentInfos.readCurrentVersion(directory) > maxIndexVersion) {
stale = true;
this.writeLock.release();
this.writeLock = null;
throw new StaleReaderException(
"IndexReader out of date and no longer valid for delete, undelete, or setNorm operations");
}
}
}
}
@Test
public void testSimpleLocking() throws Exception {
ByteBufferCache cache = new ByteBufferCache(40, 80, true);
ByteBufferDirectory dir = new ByteBufferDirectory(cache);
Lock lock = dir.makeLock("testlock");
assertThat(lock.isLocked(), equalTo(false));
assertThat(lock.obtain(200), equalTo(true));
assertThat(lock.isLocked(), equalTo(true));
try {
assertThat(lock.obtain(200), equalTo(false));
assertThat("lock should be thrown", false, equalTo(true));
} catch (LockObtainFailedException e) {
// all is well
}
lock.release();
assertThat(lock.isLocked(), equalTo(false));
dir.close();
cache.close();
}
/**
* Commit changes resulting from delete, undeleteAll, or setNorm operations
*
* <p>If an exception is hit, then either no changes or all changes will have been committed to
* the index (transactional semantics).
*
* @throws IOException if there is a low-level IO error
*/
@Override
protected void doCommit(Map<String, String> commitUserData) throws IOException {
if (hasChanges) {
segmentInfos.setUserData(commitUserData);
// Default deleter (for backwards compatibility) is
// KeepOnlyLastCommitDeleter:
IndexFileDeleter deleter =
new IndexFileDeleter(
directory,
deletionPolicy == null ? new KeepOnlyLastCommitDeletionPolicy() : deletionPolicy,
segmentInfos,
null,
null);
segmentInfos.updateGeneration(deleter.getLastSegmentInfos());
segmentInfos.changed();
// Checkpoint the state we are about to change, in
// case we have to roll back:
startCommit();
final List<SegmentInfo> rollbackSegments = segmentInfos.createBackupSegmentInfos(false);
boolean success = false;
try {
for (int i = 0; i < subReaders.length; i++) subReaders[i].commit();
// Remove segments that contain only 100% deleted
// docs:
segmentInfos.pruneDeletedSegments();
// Sync all files we just wrote
directory.sync(segmentInfos.files(directory, false));
segmentInfos.commit(directory);
success = true;
} finally {
if (!success) {
// Rollback changes that were made to
// SegmentInfos but failed to get [fully]
// committed. This way this reader instance
// remains consistent (matched to what's
// actually in the index):
rollbackCommit();
// Recompute deletable files & remove them (so
// partially written .del files, etc, are
// removed):
deleter.refresh();
// Restore all SegmentInfos (in case we pruned some)
segmentInfos.rollbackSegmentInfos(rollbackSegments);
}
}
// Have the deleter remove any now unreferenced
// files due to this commit:
deleter.checkpoint(segmentInfos, true);
deleter.close();
maxIndexVersion = segmentInfos.getVersion();
if (writeLock != null) {
writeLock.release(); // release write lock
writeLock = null;
}
}
hasChanges = false;
}
/**
* Closes this geoIndexer and releases any locks held
*
* @throws IOException
*/
public void close() throws IOException {
lock.release();
}