bneradt commented on code in PR #13278:
URL: https://github.com/apache/trafficserver/pull/13278#discussion_r3447034624
##########
include/proxy/http/remap/PluginDso.h:
##########
@@ -46,16 +46,72 @@
namespace fs = swoc::file;
#include "tscore/Ptr.h"
+#include "tsutil/Metrics.h"
#include "iocore/eventsystem/EventSystem.h"
#include "proxy/Plugin.h"
+#include <cctype>
+#include <string>
+#include <string_view>
+
class PluginThreadContext : public RefCountObjInHeap
{
public:
- virtual void acquire() = 0;
- virtual void release() = 0;
- static constexpr const char *const _tag = "plugin_context"; /** @brief
log tag used by this class */
+ virtual void acquire() = 0;
+ virtual void release() = 0;
+
+ /** @brief Register this plugin's proxy.process.plugin.<name>.* metrics. @a
plugin_name is the DSO
+ * path; only its basename stem is used as <name>. Defined inline so
callers in ts::proxy (the
+ * global-plugin context) take no link dependency on ts::http_remap. */
+ void
+ registerPluginMetrics(std::string_view plugin_name)
+ {
+ std::string prefix = "proxy.process.plugin." + _metric_token(plugin_name)
+ ".";
+
+ _invocations = ts::Metrics::Counter::createPtr(prefix + "invocations");
+ _bytes = ts::Metrics::Counter::createPtr(prefix + "bytes");
+ _transfers = ts::Metrics::Counter::createPtr(prefix + "transfers");
+ }
Review Comment:
Can we put the implementation of this and these other functions in
PluginDso.cc?
##########
tests/gold_tests/pluginTest/per_plugin_metrics/per_plugin_metrics.test.py:
##########
@@ -0,0 +1,100 @@
+'''
+Verify the per-plugin workload counters
proxy.process.plugin.<name>.{invocations,bytes,transfers}.
+'''
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+Test.Summary = '''
+Verify the per-plugin workload counters
proxy.process.plugin.<name>.invocations (global and remap
+dispatch), .bytes and .transfers (PluginVC intercept transport).
+'''
+
+Test.ContinueOnFail = True
+
+ts = Test.MakeATSProcess("ts")
+server = Test.MakeOriginServer("server")
+
+request_header = {"headers": "GET / HTTP/1.1\r\nHost: test.example\r\n\r\n",
"timestamp": "1469733493.993", "body": ""}
Review Comment:
Can you please ask your clanker to reorganize this as a test class?
```python
class TestPerPluginWorkloadCounters:
def __init__(self, params):
# Create a TestRun and setup up the needed servers and configure the
client
TestPerPluginWorkloadCounters(params1)
TestPerPluginWorkloadCounters(params2)
```
##########
include/proxy/http/remap/PluginDso.h:
##########
@@ -46,16 +46,72 @@
namespace fs = swoc::file;
#include "tscore/Ptr.h"
+#include "tsutil/Metrics.h"
#include "iocore/eventsystem/EventSystem.h"
#include "proxy/Plugin.h"
+#include <cctype>
+#include <string>
+#include <string_view>
+
class PluginThreadContext : public RefCountObjInHeap
{
public:
- virtual void acquire() = 0;
- virtual void release() = 0;
- static constexpr const char *const _tag = "plugin_context"; /** @brief
log tag used by this class */
+ virtual void acquire() = 0;
+ virtual void release() = 0;
+
+ /** @brief Register this plugin's proxy.process.plugin.<name>.* metrics. @a
plugin_name is the DSO
+ * path; only its basename stem is used as <name>. Defined inline so
callers in ts::proxy (the
+ * global-plugin context) take no link dependency on ts::http_remap. */
+ void
+ registerPluginMetrics(std::string_view plugin_name)
+ {
+ std::string prefix = "proxy.process.plugin." + _metric_token(plugin_name)
+ ".";
+
+ _invocations = ts::Metrics::Counter::createPtr(prefix + "invocations");
+ _bytes = ts::Metrics::Counter::createPtr(prefix + "bytes");
+ _transfers = ts::Metrics::Counter::createPtr(prefix + "transfers");
+ }
+
+ void
+ countInvocation()
+ {
+ if (_invocations != nullptr) {
+ _invocations->increment(1);
+ }
+ }
+
+ ts::Metrics::Counter::AtomicType *_invocations = nullptr;
+ ts::Metrics::Counter::AtomicType *_bytes = nullptr;
+ ts::Metrics::Counter::AtomicType *_transfers = nullptr;
+
+ static constexpr const char *const _tag = "plugin_context"; /** @brief log
tag used by this class */
+
+private:
+ /** Derive a metric-safe token from a plugin path: the basename with the
extension removed, then any
+ * character outside [A-Za-z0-9_-] replaced by '_' (e.g.
"/.../header_rewrite.so" -> "header_rewrite"). */
+ static std::string
+ _metric_token(std::string_view name)
+ {
+ if (auto slash = name.find_last_of('/'); slash != std::string_view::npos) {
+ name.remove_prefix(slash + 1);
+ }
+ if (auto dot = name.find_last_of('.'); dot != std::string_view::npos) {
+ name = name.substr(0, dot);
+ }
+
+ std::string token{name};
+ for (auto &c : token) {
+ if (!(std::isalnum(static_cast<unsigned char>(c)) || c == '_' || c ==
'-')) {
+ c = '_';
+ }
+ }
Review Comment:
`replace_if` is made for this and by virtue of its name will communicate
intent better:
```cpp
std::string token{name};
std::replace_if(token.begin(), token.end(),
[](unsigned char c) {
return !(std::isalnum(c) || c == '_' || c == '-');
},
'_');
```
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