[Impala-ASF-CR] IMPALA-4835 (prep only): create io subfolder and namespace

["Tim Armstrong (Code Review)" <ge...@cloudera.org>]

Hello Impala Public Jenkins, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/8424

to look at the new patch set (#4).

Change subject: IMPALA-4835 (prep only): create io subfolder and namespace
......................................................................

IMPALA-4835 (prep only): create io subfolder and namespace

Instead of using the DiskIoMgr class as a namespace, which prevents
forward-declaration of inner classes, create an impala::io namespace
and unnested the inner class.

This is done in anticipation of DiskIoMgr depending on BufferPool. This
helps avoid a circular dependency between DiskIoMgr, TmpFileMgr and
BufferPool headers that could not be broken with forward declarations.

Testing:
Ran core tests.

Change-Id: If807f93a47d8027a43e56dd80b1b535d0bb74e1b
---
M be/CMakeLists.txt
M be/src/exec/base-sequence-scanner.cc
M be/src/exec/hdfs-parquet-scanner.cc
M be/src/exec/hdfs-parquet-scanner.h
M be/src/exec/hdfs-scan-node-base.cc
M be/src/exec/hdfs-scan-node-base.h
M be/src/exec/hdfs-scan-node-mt.h
M be/src/exec/hdfs-scan-node.cc
M be/src/exec/hdfs-scan-node.h
M be/src/exec/hdfs-text-scanner.cc
M be/src/exec/kudu-scan-node.cc
M be/src/exec/scanner-context.cc
M be/src/exec/scanner-context.h
M be/src/runtime/CMakeLists.txt
D be/src/runtime/disk-io-mgr.h
M be/src/runtime/exec-env.cc
M be/src/runtime/exec-env.h
A be/src/runtime/io/CMakeLists.txt
R be/src/runtime/io/disk-io-mgr-internal.h
R be/src/runtime/io/disk-io-mgr-stress-test.cc
R be/src/runtime/io/disk-io-mgr-stress.cc
R be/src/runtime/io/disk-io-mgr-stress.h
R be/src/runtime/io/disk-io-mgr-test.cc
R be/src/runtime/io/disk-io-mgr.cc
A be/src/runtime/io/disk-io-mgr.h
R be/src/runtime/io/handle-cache.h
R be/src/runtime/io/handle-cache.inline.h
R be/src/runtime/io/request-context.cc
R be/src/runtime/io/request-context.h
A be/src/runtime/io/request-ranges.h
R be/src/runtime/io/scan-range.cc
M be/src/runtime/row-batch.h
M be/src/runtime/runtime-state.cc
M be/src/runtime/runtime-state.h
M be/src/runtime/test-env.h
M be/src/runtime/tmp-file-mgr-test.cc
M be/src/runtime/tmp-file-mgr.cc
M be/src/runtime/tmp-file-mgr.h
38 files changed, 1,416 insertions(+), 1,310 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/24/8424/4
-- 
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: If807f93a47d8027a43e56dd80b1b535d0bb74e1b
Gerrit-Change-Number: 8424
Gerrit-PatchSet: 4
Gerrit-Owner: Tim Armstrong <ta...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins