Percona telemetry #5243
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Percona telemetry #5243
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kamil-holubicki
requested review from
percona-ysorokin,
satya-bodapati,
oleksandr-kachan and
dlenev
| REQUIRES_SERVICE_PLACEHOLDER_AS(component_sys_variable_unregister, | ||
| component_sys_variable_unregister_srv); | ||
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| static std::unique_ptr<PerconaTelemetryComponent> percona_telemetry_component; |
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anonymous namespace can be used for a group of static declarations
namespace {
...
} // anonymous namespace
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what is the advantage?
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Just stylistic.
Instead of
static int a;
static int b;
...
you can write
namespace {
int a;
int b;
...
}
Basically, you don't have to put static keyword on each declaration.
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I'm still not fully convinced, but let's do it in modern way as you said :)
- Symbols in unnamed namespaces are exported from the library anyway, but their names are randomly mangled. This can cause the linker to do its job longer.
- Maybe I'm old-school, but when I see
static, I exactly know, what it means in all possible contexts. Having an unnamed namespace it is not instantly clear what the function scope is. - If there is only one static variable/function, wrapping it with an anonymous namespace seems to be too verbose. Using
staticin such a case seems to be violating rules: we should use one or another way of limiting the scope, not mixing to avoid mess. - Looks like C++ committee undepreciated use of
static
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| REQUIRES_SERVICE_PLACEHOLDER_AS(component_sys_variable_unregister, | ||
| component_sys_variable_unregister_srv); | ||
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| static std::unique_ptr<PerconaTelemetryComponent> percona_telemetry_component; |
There was a problem hiding this comment.
Just stylistic.
Instead of
static int a;
static int b;
...
you can write
namespace {
int a;
int b;
...
}
Basically, you don't have to put static keyword on each declaration.
| std::filesystem::path::preferred_separator; | ||
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| // Let's keep it as std::string, because there is no way to string + string_vew | ||
| static const std::string TMP_FILE_EXTENSION(".tmp"); |
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could be std::string_view
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| // history_keep_interval | ||
| // 2. This is someone's else file, but it is older than the highest | ||
| // possible history_keep_interval | ||
| if (our_file && (file_timestamp < oldest_timestamp)) { |
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Up to you but a few comments:
- std::time_t is an unspecified type, so it may not be long.
- Even if it is long, this is a SIGNED type which may not be what you expect (as you may have already noticed I don't like signed types :) )
- For instance a difference between 2 timestamps may be negative (in case of clock change / ntp adjustments).
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VarunNagaraju
approved these changes
Jun 14, 2024
TEL-46: MySql telemetry component creates telemetry files with not sufficient r/w privileges for TA Problem: Depending on OS configuration, MySql component can create telemetry files with permissions not enough for TA to read their content (e.g. 600). It is required to have permissions mask at least 644. TA deletes files after processing, but deletion permission is a matter of the directory mask, not the file itself. Solution: Storage component adds needed permissions after file creation.
https://perconadev.atlassian.net/browse/PS-9165 Updated copyright info.
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kamil-holubicki
merged commit 2cdd70f
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percona:release-8.0.37-29
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