private Timestamp<?> getCurrentOplogTimestamp() {
return Timestamp.on(
oplogCollection
.find()
.sort(new BasicDBObject(MongoDBRiver.INSERTION_ORDER_KEY, -1))
.limit(1)
.next());
}
private void isRiverStale(DBCursor cursor, Timestamp<?> time) throws SlurperException {
if (cursor == null || time == null) {
return;
}
if (definition.getInitialTimestamp() != null && time.equals(definition.getInitialTimestamp())) {
return;
}
DBObject entry = cursor.next();
Timestamp<?> oplogTimestamp = Timestamp.on(entry);
if (!time.equals(oplogTimestamp)) {
MongoDBRiverHelper.setRiverStatus(client, definition.getRiverName(), Status.RIVER_STALE);
throw new SlurperException("River out of sync with oplog.rs collection");
}
}
private boolean isValidOplogEntry(final DBObject entry, final Timestamp<?> startTimestamp) {
if (MongoDBRiver.OPLOG_NOOP_OPERATION.equals(entry.get(MongoDBRiver.OPLOG_OPERATION))) {
logger.debug("[No-op Oplog Entry] - can be ignored. {}", entry);
return false;
}
String namespace = (String) entry.get(MongoDBRiver.OPLOG_NAMESPACE);
// Initial support for sharded collection -
// https://jira.mongodb.org/browse/SERVER-4333
// Not interested in operation from migration or sharding
if (entry.containsField(MongoDBRiver.OPLOG_FROM_MIGRATE)
&& ((BasicBSONObject) entry).getBoolean(MongoDBRiver.OPLOG_FROM_MIGRATE)) {
logger.debug(
"[Invalid Oplog Entry] - from migration or sharding operation. Can be ignored. {}",
entry);
return false;
}
// Not interested by chunks - skip all
if (namespace.endsWith(MongoDBRiver.GRIDFS_CHUNKS_SUFFIX)) {
return false;
}
if (startTimestamp != null) {
Timestamp<?> oplogTimestamp = Timestamp.on(entry);
if (Timestamp.compare(oplogTimestamp, startTimestamp) < 0) {
logger.debug(
"[Invalid Oplog Entry] - entry timestamp [{}] before startTimestamp [{}]",
entry,
startTimestamp);
return false;
}
}
boolean validNamespace = false;
if (definition.isMongoGridFS()) {
validNamespace = gridfsOplogNamespace.equals(namespace);
} else {
if (definition.isImportAllCollections()) {
// Skip temp entry generated by map / reduce
if (namespace.startsWith(definition.getMongoDb())
&& !namespace.startsWith(definition.getMongoDb() + ".tmp.mr")) {
validNamespace = true;
}
} else {
if (definition.getMongoOplogNamespace().equals(namespace)) {
validNamespace = true;
}
}
if (cmdOplogNamespace.equals(namespace)) {
validNamespace = true;
}
if (MongoDBRiver.OPLOG_ADMIN_COMMAND.equals(namespace)) {
validNamespace = true;
}
}
if (!validNamespace) {
logger.debug("[Invalid Oplog Entry] - namespace [{}] is not valid", namespace);
return false;
}
String operation = (String) entry.get(MongoDBRiver.OPLOG_OPERATION);
if (!oplogOperations.contains(operation)) {
logger.debug("[Invalid Oplog Entry] - operation [{}] is not valid", operation);
return false;
}
// TODO: implement a better solution
if (definition.getMongoOplogFilter() != null) {
DBObject object = (DBObject) entry.get(MongoDBRiver.OPLOG_OBJECT);
BasicDBObject filter = definition.getMongoOplogFilter();
if (!filterMatch(filter, object)) {
logger.debug(
"[Invalid Oplog Entry] - filter [{}] does not match object [{}]", filter, object);
return false;
}
}
return true;
}
private Timestamp<?> processOplogEntry(final DBObject entry, final Timestamp<?> startTimestamp)
throws InterruptedException {
// To support transactions, TokuMX wraps one or more operations in a single oplog entry, in a
// list.
// As long as clients are not transaction-aware, we can pretty safely assume there will only be
// one operation in the list.
// Supporting genuine multi-operation transactions will require a bit more logic here.
flattenOps(entry);
if (!isValidOplogEntry(entry, startTimestamp)) {
return startTimestamp;
}
Operation operation = Operation.fromString(entry.get(MongoDBRiver.OPLOG_OPERATION).toString());
String namespace = entry.get(MongoDBRiver.OPLOG_NAMESPACE).toString();
String collection = null;
Timestamp<?> oplogTimestamp = Timestamp.on(entry);
DBObject object = (DBObject) entry.get(MongoDBRiver.OPLOG_OBJECT);
if (definition.isImportAllCollections()) {
if (namespace.startsWith(definition.getMongoDb()) && !namespace.equals(cmdOplogNamespace)) {
collection = getCollectionFromNamespace(namespace);
}
} else {
collection = definition.getMongoCollection();
}
if (namespace.equals(cmdOplogNamespace)) {
if (object.containsField(MongoDBRiver.OPLOG_DROP_COMMAND_OPERATION)) {
operation = Operation.DROP_COLLECTION;
if (definition.isImportAllCollections()) {
collection = object.get(MongoDBRiver.OPLOG_DROP_COMMAND_OPERATION).toString();
if (collection.startsWith("tmp.mr.")) {
return startTimestamp;
}
}
}
if (object.containsField(MongoDBRiver.OPLOG_DROP_DATABASE_COMMAND_OPERATION)) {
operation = Operation.DROP_DATABASE;
}
}
logger.trace("namespace: {} - operation: {}", namespace, operation);
if (namespace.equals(MongoDBRiver.OPLOG_ADMIN_COMMAND)) {
if (operation == Operation.COMMAND) {
processAdminCommandOplogEntry(entry, startTimestamp);
return startTimestamp;
}
}
if (logger.isTraceEnabled()) {
logger.trace("MongoDB object deserialized: {}", object.toString());
logger.trace("collection: {}", collection);
logger.trace("oplog entry - namespace [{}], operation [{}]", namespace, operation);
logger.trace("oplog processing item {}", entry);
}
String objectId = getObjectIdFromOplogEntry(entry);
if (operation == Operation.DELETE) {
// Include only _id in data, as vanilla MongoDB does, so transformation scripts won't be
// broken by Toku
if (object.containsField(MongoDBRiver.MONGODB_ID_FIELD)) {
if (object.keySet().size() > 1) {
entry.put(
MongoDBRiver.OPLOG_OBJECT,
object = new BasicDBObject(MongoDBRiver.MONGODB_ID_FIELD, objectId));
}
} else {
throw new NullPointerException(MongoDBRiver.MONGODB_ID_FIELD);
}
}
if (definition.isMongoGridFS()
&& namespace.endsWith(MongoDBRiver.GRIDFS_FILES_SUFFIX)
&& (operation == Operation.INSERT || operation == Operation.UPDATE)) {
if (objectId == null) {
throw new NullPointerException(MongoDBRiver.MONGODB_ID_FIELD);
}
GridFS grid = new GridFS(mongo.getDB(definition.getMongoDb()), collection);
GridFSDBFile file = grid.findOne(new ObjectId(objectId));
if (file != null) {
logger.info("Caught file: {} - {}", file.getId(), file.getFilename());
object = file;
} else {
logger.warn("Cannot find file from id: {}", objectId);
}
}
if (object instanceof GridFSDBFile) {
if (objectId == null) {
throw new NullPointerException(MongoDBRiver.MONGODB_ID_FIELD);
}
if (logger.isTraceEnabled()) {
logger.trace("Add attachment: {}", objectId);
}
addToStream(operation, oplogTimestamp, applyFieldFilter(object), collection);
} else {
if (operation == Operation.UPDATE) {
DBObject update = (DBObject) entry.get(MongoDBRiver.OPLOG_UPDATE);
logger.debug("Updated item: {}", update);
addQueryToStream(operation, oplogTimestamp, update, collection);
} else {
if (operation == Operation.INSERT) {
addInsertToStream(oplogTimestamp, applyFieldFilter(object), collection);
} else {
addToStream(operation, oplogTimestamp, applyFieldFilter(object), collection);
}
}
}
return oplogTimestamp;
}
