Fix tomcat instrumentation when user includes wrong servlet api (#10757)

Author: laurit

instrumentation/tomcat/tomcat-10.0/javaagent/build.gradle.kts

@@ -21,6 +21,8 @@ dependencies {
 
   // Make sure nothing breaks due to both 7.0 and 10.0 modules being present together
   testInstrumentation(project(":instrumentation:tomcat:tomcat-7.0:javaagent"))
+  // testing whether instrumentation still works when javax servlet api is also present
+  testImplementation("javax.servlet:javax.servlet-api:3.0.1")
 }
 
 tasks {

instrumentation/tomcat/tomcat-10.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/tomcat/v10_0/Tomcat10InstrumentationModule.java

@@ -25,7 +25,7 @@ public Tomcat10InstrumentationModule() {
   @Override
   public ElementMatcher.Junction<ClassLoader> classLoaderMatcher() {
     // only matches tomcat 10.0+
-    return hasClassesNamed("jakarta.servlet.ReadListener");
+    return hasClassesNamed("jakarta.servlet.http.HttpServletRequest");
   }
 
   @Override

instrumentation/tomcat/tomcat-7.0/javaagent/build.gradle.kts

@@ -22,6 +22,8 @@ dependencies {
   testInstrumentation(project(":instrumentation:servlet:servlet-javax-common:javaagent"))
   // Make sure nothing breaks due to both 7.0 and 10.0 modules being present together
   testInstrumentation(project(":instrumentation:tomcat:tomcat-10.0:javaagent"))
+  // testing whether instrumentation still works when jakarta servlet api is also present
+  testImplementation("jakarta.servlet:jakarta.servlet-api:5.0.0")
 
   testLibrary("org.apache.tomcat.embed:tomcat-embed-core:8.0.41")
   testLibrary("org.apache.tomcat.embed:tomcat-embed-jasper:8.0.41")

instrumentation/tomcat/tomcat-7.0/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/tomcat/v7_0/Tomcat7InstrumentationModule.java

@@ -7,7 +7,6 @@
 
 import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasClassesNamed;
 import static java.util.Collections.singletonList;
-import static net.bytebuddy.matcher.ElementMatchers.not;
 
 import com.google.auto.service.AutoService;
 import io.opentelemetry.javaagent.extension.instrumentation.InstrumentationModule;
@@ -26,7 +25,7 @@ public Tomcat7InstrumentationModule() {
   @Override
   public ElementMatcher.Junction<ClassLoader> classLoaderMatcher() {
     // does not match tomcat 10.0+
-    return not(hasClassesNamed("jakarta.servlet.ReadListener"));
+    return hasClassesNamed("javax.servlet.http.HttpServletRequest");
   }
 
   @Override