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From "cbertu81@libero.it" <cbert...@libero.it>
Subject WriteMultiColumns just write one column ... amazing!
Date Thu, 24 Mar 2011 15:03:48 GMT
Hi all,
I'm almost sure I'm just tired and I am doing something stupid however I can't 
understand this problem.
In one Super Column Family I have just 2 rows, called ALL and INCREMENTAL.

For some reason I sometimes need to duplicate a SuperColumn from the row ALL 
to the INCREMENTAL one ... very easy 
(cassandra 0.7.4, java, pelops)

    private static void mirrorizeEngineSuperColumn(Bytes superColumnId) {
        Mutator mutator = Pelops.createMutator(SocialContext.POOL_NAME_VALUE);
        Selector selector = Pelops.createSelector(SocialContext.
POOL_NAME_VALUE);
        try {
            SuperColumn sc = selector.getSuperColumnFromRow(MotoreFamily, 
SocialColumn.MOTORE_ALL_ROW, superColumnId, ConsistencyLevel.QUORUM);
            LOG.debug("Column list size of supercolumn is " + sc.
getColumnsSize());
            mutator.writeSubColumns(MotoreFamily, SocialColumn.
MOTORE_INCREMENTALI_ROW, superColumnId, sc.getColumns());
            mutator.execute(ConsistencyLevel.QUORUM);
        } catch (NotFoundException nfe) {
            LOG.debug("Supercolumn not found ...");
        } catch (Exception e) {
            LOG.error(e.toString());
        }
    }

When I print it the column list size is exact (3, 4 it depends on which 
supercolumn I'm working) but when I write them I find only one column of this 
column list ... here is the output produced (viewing with cassandra cli ...) -- 
compare the 3 super_column in the row INCREMENTAL and you'll see they're 
different from the one in the row ALL

RowKey: ALL
=> (super_column=54b05120-552f-11e0-9d1f-020054554e01,
     (column=54fc9c60-552f-11e0-9d1f-020054554e01, value=00000003, 
timestamp=1300872296917000)
     (column=746595b0-553f-11e0-9e66-020054554e01, value=00000002, 
timestamp=1300879284037000)
     (column=6ec46ef0-5540-11e0-9e66-020054554e01, value=00000004, 
timestamp=1300879641811000)
     (column=99d911d0-5541-11e0-af7b-020054554e01, value=00000001, 
timestamp=1300880138869000))
=> (super_column=97351e20-5545-11e0-9464-001d72d09363,
     (column=9763cf40-5545-11e0-9464-001d72d09363, value=00000004, 
timestamp=1300881876938000)
     (column=1e5b7a40-5549-11e0-8da1-020054554e01, value=00000005, 
timestamp=1300883402593000)
     (column=89f7c3e0-560b-11e0-a6ac-020054554e01, value=00000005, 
timestamp=1300966880883000))
=> (super_column=cadf5940-55ed-11e0-9b97-020054554e01,
     (column=cb03aa20-55ed-11e0-9b97-020054554e01, value=00000004, 
timestamp=1300954178721000)
     (column=27092500-5609-11e0-b1f1-020054554e01, value=00000004, 
timestamp=1300965858839000)
     (column=5cdf88d0-560a-11e0-a6ac-020054554e01, value=00000005, 
timestamp=1300966438198000)
     (column=c6e34110-561c-11e0-9399-020054554e01, value=00000005, 
timestamp=1300974305208000))
=> (super_column=309d66a0-5602-11e0-9cc8-020054554e01,
     (column=30d8e900-5602-11e0-9cc8-020054554e01, value=00000005, 
timestamp=1300963602927000)
     (column=8c8a4f40-5603-11e0-9cc8-020054554e01, value=00000005, 
timestamp=1300963728307000)
     (column=62246620-5606-11e0-9e06-020054554e01, value=00000005, 
timestamp=1300964702748000)
     (column=db951080-561b-11e0-8880-020054554e01, value=00000003, 
timestamp=1300973895462000))
=> (super_column=e44f1860-560c-11e0-b696-020054554e01,
     (column=e5045ea0-560c-11e0-b696-020054554e01, value=00000005, 
timestamp=1300967480905000))
=> (super_column=e53d7000-560c-11e0-b696-020054554e01,
     (column=e56395a0-560c-11e0-b696-020054554e01, value=00000005, 
timestamp=1300967620609000))
=> (super_column=90ce8370-5615-11e0-b696-020054554e01,
     (column=9100de10-5615-11e0-b696-020054554e01, value=00000005, 
timestamp=1300971213814000)
     (column=a5171450-5615-11e0-b696-020054554e01, value=00000005, 
timestamp=1300971294115000)
     (column=9fb68390-5617-11e0-9ed9-020054554e01, value=00000002, 
timestamp=1300972093565000)
     (column=79889ed0-561a-11e0-bf27-020054554e01, value=00000002, 
timestamp=1300973301530000))
-------------------
RowKey: INCREMENTAL
=> (super_column=cadf5940-55ed-11e0-9b97-020054554e01,
     (column=c6e34110-561c-11e0-9399-020054554e01, value=00000005, 
timestamp=1300974305208000))
=> (super_column=309d66a0-5602-11e0-9cc8-020054554e01,
     (column=db951080-561b-11e0-8880-020054554e01, value=00000003, 
timestamp=1300973895462000))
=> (super_column=90ce8370-5615-11e0-b696-020054554e01,
     (column=9fb68390-5617-11e0-9ed9-020054554e01, value=00000002, 
timestamp=1300972093565000))

I think I'm getting crazy!
TIA for any help

Best regards

Carlo

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