Till Westmann has posted comments on this change.

Change subject: Add record reader and parser for CAP messages
......................................................................


Patch Set 12:

(10 comments)

Just a few comments - didn't think about your object allocation question  ...

https://asterix-gerrit.ics.uci.edu/#/c/1269/12/asterixdb/asterix-app/src/test/resources/runtimets/queries/feeds/caps-adaptor-collection/caps-adaptor-collection.4.update.aql
File 
asterixdb/asterix-app/src/test/resources/runtimets/queries/feeds/caps-adaptor-collection/caps-adaptor-collection.4.update.aql:

Line 18:  */
Should we just leave this file out and renumber the following one(s)? I know 
that we have such empty files in other tests, but maybe we don't need to add 
more of those ..


https://asterix-gerrit.ics.uci.edu/#/c/1269/12/asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/input/record/reader/stream/CAPMessageRecordReader.java
File 
asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/input/record/reader/stream/CAPMessageRecordReader.java:

Line 63:             // TODO: simplify the state numbers (xikui)
It would be better to use named constants instead of numbers for the state. 
Also it seems that "curState" or just "state" would be a better name than 
"curStatus".


https://asterix-gerrit.ics.uci.edu/#/c/1269/12/asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/parser/CAPMessageParser.java
File 
asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/parser/CAPMessageParser.java:

Line 75:     private SAXParserFactory capMessageSAXParserFactory;
Could be a local variable.


Line 130:             rbList.get(0).write(out, true);
Do you expect that parsing changes the value of rbList.get(0)? If not, we could 
have a local variable for the record builder instead of accessing the list 
every time.


Line 244:                         
out.write(BuiltinType.AINT32.getTypeTag().serialize());
This looks strange. Why do we need to serialize the type tag after the value 
here?


Line 329:         private void handleNestedOrderedList(String fullPathName, int 
fieldNameIdx) throws HyracksDataException {
Could you add a comment to this method that describes the case in which it is 
needed?


https://asterix-gerrit.ics.uci.edu/#/c/1269/12/asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/parser/factory/CAPMessageParserFactory.java
File 
asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/parser/factory/CAPMessageParserFactory.java:

Line 31: import org.apache.hyracks.api.exceptions.HyracksDataException;
Some imports seem to be unused. Could you remove them?


https://asterix-gerrit.ics.uci.edu/#/c/1269/12/asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/util/ExternalDataConstants.java
File 
asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/util/ExternalDataConstants.java:

Line 206:     public static final char QUESTION_MARK = '?';
It seems that these 4 are not used. Can we remove them again?


https://asterix-gerrit.ics.uci.edu/#/c/1269/12/asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/util/FileSystemWatcher.java
File 
asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/util/FileSystemWatcher.java:

Line 240:             } catch (InterruptedException x) {
I'm not completely aware of the lifecycle here, but it seems that not setting 
the interrupted state isn't right.
@Abdullah: Can you give some insight on how this should work?


https://asterix-gerrit.ics.uci.edu/#/c/1269/12/asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/util/LocalFileSystemUtils.java
File 
asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/util/LocalFileSystemUtils.java:

Line 71:     private static boolean fileNotExistsInList(LinkedList<File> files, 
Path path) {
Should we use List<> instead of LinkedList<>? It seems that the chosen 
implementation should be immaterial to the interface.


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Gerrit-MessageType: comment
Gerrit-Change-Id: Ia36101a0761973a9edb96b42d3dcc117661301da
Gerrit-PatchSet: 12
Gerrit-Project: asterixdb
Gerrit-Branch: master
Gerrit-Owner: Xikui Wang <[email protected]>
Gerrit-Reviewer: Ian Maxon <[email protected]>
Gerrit-Reviewer: Jenkins <[email protected]>
Gerrit-Reviewer: Till Westmann <[email protected]>
Gerrit-Reviewer: Xikui Wang <[email protected]>
Gerrit-Reviewer: abdullah alamoudi <[email protected]>
Gerrit-HasComments: Yes

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