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[BUILD] SDK Header files cleanup, use forward declarations #2182

Merged
merged 3 commits into from
Jun 20, 2023
Merged

[BUILD] SDK Header files cleanup, use forward declarations #2182

merged 3 commits into from
Jun 20, 2023

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cngzhnp
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@cngzhnp cngzhnp commented Jun 6, 2023

Fixes #2043

Changes

Clean up header files in SDK folder to use as much as possible forward declarations.

For significant contributions please make sure you have completed the following items:

  • CHANGELOG.md updated for non-trivial changes
  • Unit tests have been added
  • Changes in public API reviewed

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codecov bot commented Jun 6, 2023 •
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Codecov Report

Merging #2182 (3dbafb8) into main (4cae6aa) will increase coverage by 0.03%.
The diff coverage is 100.00%.

Additional details and impacted files

Impacted file tree graph

@@            Coverage Diff             @@
##             main    #2182      +/-   ##
==========================================
+ Coverage   87.50%   87.53%   +0.03%     
==========================================
  Files         169      169              
  Lines        4887     4888       +1     
==========================================
+ Hits         4276     4278       +2     
+ Misses        611      610       -1
Impacted Files Coverage Δ
...pentelemetry/trace/span_context_kv_iterable_view.h 84.22% <ø> (ø)
exporters/ostream/src/metric_exporter.cc 91.81% <ø> (ø)
exporters/ostream/test/ostream_metric_test.cc 100.00% <ø> (ø)
...include/opentelemetry/sdk/common/attribute_utils.h 98.28% <ø> (ø)
...clude/opentelemetry/sdk/common/attributemap_hash.h 83.88% <ø> (ø)
...include/opentelemetry/sdk/common/circular_buffer.h 100.00% <ø> (ø)
...e/opentelemetry/sdk/common/circular_buffer_range.h 100.00% <ø> (ø)
...nclude/opentelemetry/sdk/common/empty_attributes.h 100.00% <ø> (ø)
...lude/opentelemetry/sdk/common/global_log_handler.h 72.23% <ø> (ø)
...y/sdk/instrumentationscope/instrumentation_scope.h 100.00% <ø> (ø)
... and 65 more

@cngzhnp cngzhnp force-pushed the forward_declaration_for_sdk branch 3 times, most recently from 226ae43 to 2cbbb31 Compare June 6, 2023 22:28
@lalitb
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lalitb commented Jun 7, 2023 •
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@cngzhnp Just curious, how are you finding out these indirect header includes ?

@cngzhnp cngzhnp marked this pull request as ready for review June 7, 2023 06:32
@cngzhnp cngzhnp requested a review from a team June 7, 2023 06:32
marcalff
marcalff approved these changes Jun 7, 2023
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Reviewed all 172 files changed.

LGTM, thanks for the cleanup.

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lalitb commented Jun 9, 2023

@cngzhnp Just curious, how are you finding out these indirect header includes ?

@cngzhnp Could you please reply, this will help review in better way :)

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cngzhnp commented Jun 9, 2023 •
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@cngzhnp Just curious, how are you finding out these indirect header includes ?

@cngzhnp Could you please reply, this will help review in better way :)

Sorry for the late response @lalitb, actually I was doing manually which means it is not perfect. However I could share my following steps like below:

  • Just pass through each header file and find the incomplete types.
  • Only forward declaration is enough and remove unnecessary header files.
  • If dependent header file is already included in the header file, remove it from implementation file.

This could be done by using IWYU as well btw.

@cngzhnp cngzhnp force-pushed the forward_declaration_for_sdk branch from 35d0ba3 to 53b5d01 Compare June 12, 2023 11:37
lalitb
lalitb reviewed Jun 13, 2023
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examples/jaeger/main.cc Show resolved Hide resolved
examples/otlp/grpc_log_main.cc Show resolved Hide resolved
examples/otlp/grpc_log_main.cc Show resolved Hide resolved
@cngzhnp cngzhnp force-pushed the forward_declaration_for_sdk branch from 6079410 to bbe9ddf Compare June 14, 2023 10:36
@esigo esigo self-assigned this Jun 19, 2023
esigo
esigo approved these changes Jun 20, 2023
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LGTM
thanks :)
nit: Jaeger exporter will be removed. no need to have changes there.

@esigo esigo added the ok-to-merge The PR is ok to merge (has two approves or raised by a maintainer/approver and has one approve) label Jun 20, 2023
lalitb
lalitb reviewed Jun 20, 2023
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sdk/include/opentelemetry/sdk/logs/logger_provider.h
# include "opentelemetry/sdk/logs/processor.h"
# include "opentelemetry/nostd/string_view.h"
# include "opentelemetry/sdk/resource/resource.h"
# include "opentelemetry/version.h"
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@lalitb lalitb Jun 20, 2023 •
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nit - This file has reference to KeyValueIterable, - seems it is indirectly included. Not a blocker, we can fix this separately.

lalitb
lalitb reviewed Jun 20, 2023
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sdk/include/opentelemetry/sdk/logs/multi_recordable.h
@@ -20,6 +19,8 @@ namespace sdk
{
namespace logs
{
class LogRecordProcessor;

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This file has reference to opentelemetry::common::SystemTimestamp - seems to be indirectly included. Not a blocker, but can be fixed separately.

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@lalitb

Good find.

I think we should automate this with include-what-you-use, because doing manual reviews checking all dependencies gets too tedious and error prone.

@marcalff marcalff changed the title Forward declaration is applied in SDK folder [SDK] Header files cleanup, use forward declarations Jun 20, 2023
@marcalff marcalff merged commit cfcda57 into open-telemetry:main Jun 20, 2023
@marcalff marcalff changed the title [SDK] Header files cleanup, use forward declarations [BUILD] SDK Header files cleanup, use forward declarations Jul 11, 2023
@chenrui333 chenrui333 mentioned this pull request Jul 14, 2023
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@lalitb lalitb mentioned this pull request Jul 27, 2023
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@marcalff marcalff marcalff approved these changes

@lalitb lalitb lalitb approved these changes

@esigo esigo esigo approved these changes

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