Can I insert results in a coprocessor?

[某因幡]

Hi, I tried to post process the result before the get requests return.
Is postGet the right place?
        @Override
        public void postGet(ObserverContext<RegionCoprocessorEnvironment> e,
                        Get get, List<KeyValue> results) throws IOException {
                String table = e.getEnvironment().getRegion().getTableDesc()
                                .getNameAsString();
                // if (table.compareTo(LOG_TABLE) != 0)
                //      return;
                KeyValue hack = new KeyValue(get.getRow(), "x".getBytes(),
                                "test".getBytes(), "hello".getBytes());
                results.add(hack);
        }

And this is the table.

hbase(main):001:0> describe 'test'
DESCRIPTION
                                     ENABLED
 {NAME => 'test', coprocessor$1 =>
'hdfs:///tmp/AccessLogRegionHelper.jar|com.test.AccessLogRegionHelper|',
true
  FAMILIES => [{NAME => 'r', BLOOMFILTER => 'NONE', REPLICATION_SCOPE
=> '0', VERSIONS => '3', COMPRESSION
 => 'SNAPPY', MIN_VERSIONS => '0', TTL => '2147483647', BLOCKSIZE =>
'65536', IN_MEMORY => 'false', BLOCKCA
 CHE => 'true'}, {NAME => 's', BLOOMFILTER => 'NONE',
REPLICATION_SCOPE => '0', COMPRESSION => 'SNAPPY', VE
 RSIONS => '3', TTL => '2147483647', MIN_VERSIONS => '0', BLOCKSIZE =>
'65536', IN_MEMORY => 'false', BLOCK
 CACHE => 'true'}, {NAME => 'x', BLOOMFILTER => 'NONE',
REPLICATION_SCOPE => '0', VERSIONS => '3', COMPRESS
 ION => 'SNAPPY', MIN_VERSIONS => '0', TTL => '2147483647', BLOCKSIZE
=> '65536', IN_MEMORY => 'false', BLO
 CKCACHE => 'true'}]}

But in JRuby shell scan won't print the key value pair I inserted in
the coprocessor.

Please figure out if I am on the right way.

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