Yingyi Bu has posted comments on this change.

Change subject: Deadlock-free locking protocol is enabled
......................................................................


Patch Set 4: Code-Review+1

(2 comments)

A few minor comments inlined.

https://asterix-gerrit.ics.uci.edu/#/c/825/4/asterixdb/asterix-transactions/src/main/java/org/apache/asterix/transaction/management/opcallbacks/LockThenSearchOperationCallback.java
File 
asterixdb/asterix-transactions/src/main/java/org/apache/asterix/transaction/management/opcallbacks/LockThenSearchOperationCallback.java:

Line 37: public class LockThenSearchOperationCallback extends 
AbstractOperationCallback implements ISearchOperationCallback {
1. Why does this class implement ISearchOperationCallback instead of 
IModificationCallBack, since it acquires x lock instead of s lock?

2.  The name of the class seems confusing to me.  It sounds like a 
read-operation-call-back but is actually a modification-call-back.

Since those are kind of orthogonal to your change,  please file JIRA issues if 
you don't want to address them in this change.


https://asterix-gerrit.ics.uci.edu/#/c/825/4/hyracks-fullstack/hyracks/hyracks-storage-am-common/src/main/java/org/apache/hyracks/storage/am/common/api/ISearchOperationCallbackFactory.java
File 
hyracks-fullstack/hyracks/hyracks-storage-am-common/src/main/java/org/apache/hyracks/storage/am/common/api/ISearchOperationCallbackFactory.java:

Line 28:     public ISearchOperationCallback createSearchOperationCallback(long 
resourceId, IHyracksTaskContext ctx, IOperatorNodePushable operatorNodePushable)
The last argument could potentially be removed if you address the 
LockAndThenSearchCallBack issues.


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Gerrit-MessageType: comment
Gerrit-Change-Id: Ie58ae2f519baa53599e99b51bd61ea5f8366dafd
Gerrit-PatchSet: 4
Gerrit-Project: asterixdb
Gerrit-Branch: master
Gerrit-Owner: Young-Seok Kim <[email protected]>
Gerrit-Reviewer: Ian Maxon <[email protected]>
Gerrit-Reviewer: Jenkins <[email protected]>
Gerrit-Reviewer: Murtadha Hubail <[email protected]>
Gerrit-Reviewer: Till Westmann <[email protected]>
Gerrit-Reviewer: Yingyi Bu <[email protected]>
Gerrit-Reviewer: Young-Seok Kim <[email protected]>
Gerrit-Reviewer: abdullah alamoudi <[email protected]>
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