First postPut coprocessor test drive

[Steinmaurer Thomas]

Hello,

I want to get a hang on implementing a postPut co-processor. A simple
test case is pretty much adding 1 to received cell values and store that
into a second HBase table. I basically have this here:

        @Override
        public void postPut(
                final ObserverContext<RegionCoprocessorEnvironment> c
                , final Put put
                , final WALEdit edit
                , final boolean writeToWAL
        ) throws IOException {
                Map<byte[], List<KeyValue>> familyMap =
put.getFamilyMap();
                RegionCoprocessorEnvironment e = c.getEnvironment();
                if
(Arrays.equals(e.getRegion().getTableDesc().getName(),
Bytes.toBytes("t"))) {
                        List<KeyValue> kvs = familyMap.get("f1");
                        for (KeyValue kv : kvs) {
                                
                        }
                }
        }

Now the question is how to process in the for loop to get the cell
value, increment the value by 1 and store that into a second HBase
table.

In general, I guess instantiating a HBase table should be at a central
point of my region observer class instead of the postPut implementation
etc ... Concrete examples on co-processors are rather rare, the only
useful thing I found were different coprocessor unit test classes, but
they don't go that far.

Thanks!

Thomas