Add instrumentation for druid connection pool

[AlchemyDing]

resolve issue
connection pools mertric, like hikaricp, DBCP ,c3p0 , etc...

[trask]

For simplicity, and since 1.0.0 was released in 2013 I'd recommend going ahead and baselining against 1.0 and renaming the module to druid-1.0

[AlchemyDing]

@trask done, thank you

[trask]

Suggested change

	skip("1.0.30")
	skip("1.0.30")
	assertInverse.set(true)

[AlchemyDing]

@trask assertInverse.set(true) will make muzzle3 check failed ,history check

[laurit]

I think your best option is to set the version range back to versions.set("[0.2.6,)") so you could add assertInverse.set(true). The same approach is used in

opentelemetry-java-instrumentation/instrumentation/logback/logback-appender-1.0/javaagent/build.gradle.kts

Line 9 in bc5398c

versions.set("[0.9.16,)")

Alternatively if there is a class that appears in 1.0 but does not appear in earlier versions you could use something like

opentelemetry-java-instrumentation/instrumentation/jetty/jetty-8.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/jetty/v8_0/Jetty8InstrumentationModule.java

Lines 26 to 28 in bc5398c

	public ElementMatcher.Junction<ClassLoader> classLoaderMatcher() {
	return hasClassesNamed("javax.servlet.Servlet");
	}

to limit the range where the instrumentation works.

[AlchemyDing]

@laurit Early versions may not have the DruidDataSourceStatManager.addDataSource method, or the parameters may be different, such as
0.2
0.2.5

[AlchemyDing]

Can I write in this way

muzzle {
  pass {
    group.set("com.alibaba")
    module.set("druid")
    versions.set("[0.1.18,)")
    skip("1.0.30")
    assertInverse.set(true)
  }
}

[laurit]

@AlchemyDing sure, I think you can also use versions.set("(,)") if muzzle passes on all published versions.

[AlchemyDing]

@laurit done, thank you

[laurit]

Overall looks nice, the only open question for me is whether we should name this alibaba-druid instead of druid because there is also https://druid.apache.org/ which is a completely different thing. @trask @mateuszrzeszutek wdyt?

[AlchemyDing]

Overall looks nice, the only open question for me is whether we should name this alibaba-druid instead of druid because there is also https://druid.apache.org/ which is a completely different thing. @trask @mateuszrzeszutek wdyt?

I think named alibaba-druid is better.