@Override
public GetResult get(Get get, Function<String, Searcher> searcherFactory) throws EngineException {
try (ReleasableLock lock = readLock.acquire()) {
ensureOpen();
if (get.realtime()) {
VersionValue versionValue = versionMap.getUnderLock(get.uid().bytes());
if (versionValue != null) {
if (versionValue.delete()) {
return GetResult.NOT_EXISTS;
}
if (get.versionType().isVersionConflictForReads(versionValue.version(), get.version())) {
Uid uid = Uid.createUid(get.uid().text());
throw new VersionConflictEngineException(
shardId,
uid.type(),
uid.id(),
get.versionType().explainConflictForReads(versionValue.version(), get.version()));
}
Translog.Operation op = translog.read(versionValue.translogLocation());
if (op != null) {
return new GetResult(true, versionValue.version(), op.getSource());
}
}
}
// no version, get the version from the index, we know that we refresh on flush
return getFromSearcher(get, searcherFactory);
}
}
private boolean innerIndex(Index index) throws IOException {
synchronized (dirtyLock(index.uid())) {
lastWriteNanos = index.startTime();
final long currentVersion;
final boolean deleted;
VersionValue versionValue = versionMap.getUnderLock(index.uid().bytes());
if (versionValue == null) {
currentVersion = loadCurrentVersionFromIndex(index.uid());
deleted = currentVersion == Versions.NOT_FOUND;
} else {
deleted = versionValue.delete();
if (engineConfig.isEnableGcDeletes()
&& versionValue.delete()
&& (engineConfig.getThreadPool().estimatedTimeInMillis() - versionValue.time())
> getGcDeletesInMillis()) {
currentVersion = Versions.NOT_FOUND; // deleted, and GC
} else {
currentVersion = versionValue.version();
}
}
long expectedVersion = index.version();
if (isVersionConflictForWrites(index, currentVersion, deleted, expectedVersion)) {
if (index.origin() != Operation.Origin.RECOVERY) {
throw new VersionConflictEngineException(
shardId,
index.type(),
index.id(),
index
.versionType()
.explainConflictForWrites(currentVersion, expectedVersion, deleted));
}
return false;
}
long updatedVersion = index.versionType().updateVersion(currentVersion, expectedVersion);
final boolean created;
index.updateVersion(updatedVersion);
if (currentVersion == Versions.NOT_FOUND) {
// document does not exists, we can optimize for create
created = true;
index(index, indexWriter);
} else {
created = update(index, versionValue, indexWriter);
}
Translog.Location translogLocation = translog.add(new Translog.Index(index));
versionMap.putUnderLock(
index.uid().bytes(), new VersionValue(updatedVersion, translogLocation));
index.setTranslogLocation(translogLocation);
return created;
}
}
private void innerDelete(Delete delete) throws IOException {
synchronized (dirtyLock(delete.uid())) {
lastWriteNanos = delete.startTime();
final long currentVersion;
final boolean deleted;
VersionValue versionValue = versionMap.getUnderLock(delete.uid().bytes());
if (versionValue == null) {
currentVersion = loadCurrentVersionFromIndex(delete.uid());
deleted = currentVersion == Versions.NOT_FOUND;
} else {
deleted = versionValue.delete();
if (engineConfig.isEnableGcDeletes()
&& versionValue.delete()
&& (engineConfig.getThreadPool().estimatedTimeInMillis() - versionValue.time())
> getGcDeletesInMillis()) {
currentVersion = Versions.NOT_FOUND; // deleted, and GC
} else {
currentVersion = versionValue.version();
}
}
long updatedVersion;
long expectedVersion = delete.version();
if (delete
.versionType()
.isVersionConflictForWrites(currentVersion, expectedVersion, deleted)) {
if (delete.origin() == Operation.Origin.RECOVERY) {
return;
} else {
throw new VersionConflictEngineException(
shardId,
delete.type(),
delete.id(),
delete
.versionType()
.explainConflictForWrites(currentVersion, expectedVersion, deleted));
}
}
updatedVersion = delete.versionType().updateVersion(currentVersion, expectedVersion);
final boolean found;
if (currentVersion == Versions.NOT_FOUND) {
// doc does not exist and no prior deletes
found = false;
} else if (versionValue != null && versionValue.delete()) {
// a "delete on delete", in this case, we still increment the version, log it, and return
// that version
found = false;
} else {
// we deleted a currently existing document
indexWriter.deleteDocuments(delete.uid());
found = true;
}
delete.updateVersion(updatedVersion, found);
Translog.Location translogLocation = translog.add(new Translog.Delete(delete));
versionMap.putUnderLock(
delete.uid().bytes(),
new DeleteVersionValue(
updatedVersion,
engineConfig.getThreadPool().estimatedTimeInMillis(),
translogLocation));
delete.setTranslogLocation(translogLocation);
}
}