saga-spring/src/main/java/org/apache/servicecomb/saga/spring/SagaEventRepo.java (1 line):
	- line 30: // TODO: 8/21/2017 replace with hql?


saga-core/src/main/java/org/apache/servicecomb/saga/core/dag/GraphBuilder.java (1 line):
	- line 95: // TODO: 8/20/2017 add random id if user didn't provide one


saga-core/src/main/java/org/apache/servicecomb/saga/core/TransactionTaskConsumer.java (1 line):
	- line 80: // TODO: 7/29/2017 what shall we do when system is shutting down?


saga-core/src/main/java/org/apache/servicecomb/saga/core/SagaRequestImpl.java (1 line):
	- line 52: // TODO: 2017/10/21 set parent to root when null


saga-core/src/main/java/org/apache/servicecomb/saga/core/EventEnvelope.java (1 line):
	- line 32: // TODO: 8/21/2017 this class seems to be useless to saga