Github user blrunner commented on the pull request:
https://github.com/apache/tajo/pull/490#issuecomment-89733757
+1
Great! It looks good overall to me and I found that rest server response
successfully on my laptop as follows.
```
$ curl -XGET 'http://localhost:26880/rest/databases'
{"databases":["default","information_schema"]}
$ curl -XGET 'http://localhost:26880/rest/databases/default/tables'
[{"tableName":"customer","external":true},{"tableName":"lineitem","external":true},{"tableName":"nation","external":true},{"tableName":"orders","external":true},{"tableName":"part","external":true},{"tableName":"partsupp","external":true},{"tableName":"supplier","external":true}]
$ curl -XGET 'http://localhost:26880/rest/cluster'
{"workers":[{"connectionInfo":{"id":-2105400716,"host":"192.168.219.106","peerRpcPort":28091,"pullServerPort":64176,"queryMasterPort":28093,"clientPort":28092,"httpInfoPort":28080},"diskSlots":0.0,"cpuCoreSlots":1,"memoryMB":1024,"usedDiskSlots":0.0,"usedMemoryMB":0,"usedCpuCoreSlots":0,"maxHeap":932184064,"freeHeap":365067488,"totalHeap":458227712,"numRunningTasks":0,"numQueryMasterTasks":0,"lastHeartbeatTime":1428221077181}]}
```
I leaved some trivial comments and I found unused methods in
WorkerConnectionInfoResponse and WorkerResponse, too. Before you ship this,
please check my comments. :)
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