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stats: rename statsns to clearer statsprefix

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`statsns`, aside from being an unclear name, in its default behaviour,
doesn't use the namespace delimiter contaminates the root namespace
of the key.

Let's take care of that by deprecating `statsns` with its replacement,
`statsprefix`, that behaves properly.
This commit is contained in:
Kittywhiskers Van Gogh 2024-09-10 18:52:28 +00:00
parent 42918c2cdc
commit 18a2e48eb9
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GPG Key ID: 30CD0C065E5C4AAD
3 changed files with 26 additions and 11 deletions
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3
src/init.cpp
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@ -777,8 +777,9 @@ void SetupServerArgs(ArgsManager& argsman)
argsman.AddArg("-statshost=<ip>", strprintf("Specify statsd host (default: %s)", DEFAULT_STATSD_HOST), ArgsManager::ALLOW_ANY, OptionsCategory::STATSD);
hidden_args.emplace_back("-statshostname");
argsman.AddArg("-statsport=<port>", strprintf("Specify statsd port (default: %u)", DEFAULT_STATSD_PORT), ArgsManager::ALLOW_ANY, OptionsCategory::STATSD);
argsman.AddArg("-statsns=<ns>", strprintf("Specify additional namespace prefix (default: %s)", DEFAULT_STATSD_SUFFIX), ArgsManager::ALLOW_ANY, OptionsCategory::STATSD);
hidden_args.emplace_back("-statsns");
argsman.AddArg("-statsperiod=<seconds>", strprintf("Specify the number of seconds between periodic measurements (default: %d)", DEFAULT_STATSD_PERIOD), ArgsManager::ALLOW_ANY, OptionsCategory::STATSD);
argsman.AddArg("-statsprefix=<string>", strprintf("Specify an optional string prepended to every stats key (default: %s)", DEFAULT_STATSD_PREFIX), ArgsManager::ALLOW_ANY, OptionsCategory::STATSD);
argsman.AddArg("-statssuffix=<string>", strprintf("Specify an optional string appended to every stats key (default: %s)", DEFAULT_STATSD_SUFFIX), ArgsManager::ALLOW_ANY, OptionsCategory::STATSD);
#if HAVE_DECL_FORK
argsman.AddArg("-daemon", strprintf("Run in the background as a daemon and accept commands (default: %d)", DEFAULT_DAEMON), ArgsManager::ALLOW_BOOL, OptionsCategory::OPTIONS);

28
src/stats/client.cpp
View File

@ -80,15 +80,29 @@ std::unique_ptr<StatsdClient> InitStatsClient(const ArgsManager& args)
auto sanitize_string = [](std::string& string) {
// Remove key delimiters from the front and back as they're added back
// in formatting
if (!string.empty()) {
if (string.front() == STATSD_NS_DELIMITER) string.erase(string.begin());
if (string.back() == STATSD_NS_DELIMITER) string.pop_back();
}
};
// Get our suffix and if we get nothing, try again with the deprecated
// argument. If we still get nothing, that's fine, suffixes are optional.
// Get our prefix and suffix and if we get nothing, try again with the
// deprecated argument. If we still get nothing, that's fine, they're optional.
auto prefix = args.GetArg("-statsprefix", DEFAULT_STATSD_PREFIX);
if (prefix.empty()) {
prefix = args.GetArg("-statsns", DEFAULT_STATSD_PREFIX);
} else {
// We restrict sanitization logic to our newly added arguments to
// prevent breaking changes.
sanitize_string(prefix);
// We need to add the delimiter here for backwards compatibility with
// the deprecated argument.
//
// TODO: Move this step into the constructor when removing deprecated
// args support
prefix += STATSD_NS_DELIMITER;
}
auto suffix = args.GetArg("-statssuffix", DEFAULT_STATSD_SUFFIX);
if (suffix.empty()) {
suffix = args.GetArg("-statshostname", DEFAULT_STATSD_SUFFIX);
@ -103,15 +117,15 @@ std::unique_ptr<StatsdClient> InitStatsClient(const ArgsManager& args)
args.GetArg("-statsport", DEFAULT_STATSD_PORT),
args.GetArg("-statsbatchsize", DEFAULT_STATSD_BATCH_SIZE),
args.GetArg("-statsduration", DEFAULT_STATSD_DURATION),
args.GetArg("-statsns", DEFAULT_STATSD_NAMESPACE),
prefix,
suffix,
is_enabled
);
}
StatsdClient::StatsdClient(const std::string& host, uint16_t port, uint64_t batch_size, uint64_t interval_ms,
const std::string& ns, const std::string& suffix, bool enabled) :
m_ns{ns},
const std::string& prefix, const std::string& suffix, bool enabled) :
m_prefix{prefix},
m_suffix{[suffix]() { return !suffix.empty() ? STATSD_NS_DELIMITER + suffix : suffix; }()}
{
if (!enabled) {
@ -177,7 +191,7 @@ bool StatsdClient::send(const std::string& key, T1 value, const std::string& typ
}
// Construct the message and if our message isn't always-send, report the sample rate
RawMessage msg{strprintf("%s%s%s:%f|%s", m_ns, key, m_suffix, value, type)};
RawMessage msg{strprintf("%s%s%s:%f|%s", m_prefix, key, m_suffix, value, type)};
if (!always_send) {
msg += strprintf("|@%.2f", sample_rate);
}

6
src/stats/client.h
View File

@ -21,7 +21,7 @@ static constexpr uint16_t DEFAULT_STATSD_PORT{8125};
/** Default host assumed to be running a Statsd server */
static const std::string DEFAULT_STATSD_HOST{"127.0.0.1"};
/** Default prefix prepended to Statsd message keys */
static const std::string DEFAULT_STATSD_NAMESPACE{""};
static const std::string DEFAULT_STATSD_PREFIX{""};
/** Default suffix appended to Statsd message keys */
static const std::string DEFAULT_STATSD_SUFFIX{""};
@ -40,7 +40,7 @@ class StatsdClient
{
public:
explicit StatsdClient(const std::string& host, uint16_t port, uint64_t batch_size, uint64_t interval_ms,
const std::string& ns, const std::string& suffix, bool enabled);
const std::string& prefix, const std::string& suffix, bool enabled);
~StatsdClient();
public:
@ -69,7 +69,7 @@ private:
std::unique_ptr<RawSender> m_sender{nullptr};
/* Phrase prepended to keys */
const std::string m_ns;
const std::string m_prefix{""};
/* Phrase appended to keys */
const std::string m_suffix{""};
};