use generic JVM params + faster cassandra startup

Author: SylvainJuge

jmx-scraper/src/integrationTest/java/io/opentelemetry/contrib/jmxscraper/target_systems/ActiveMqIntegrationTest.java

@@ -25,12 +25,7 @@ protected GenericContainer<?> createTargetContainer(int jmxPort) {
                     builder -> builder.from("apache/activemq-classic:5.18.6").build()))
         .withEnv(
             "JAVA_TOOL_OPTIONS",
-            "-Dcom.sun.management.jmxremote.port="
-                + jmxPort
-                + " -Dcom.sun.management.jmxremote.rmi.port="
-                + jmxPort
-                + " -Dcom.sun.management.jmxremote.ssl=false"
-                + " -Dcom.sun.management.jmxremote.authenticate=false")
+            genericJmxJvmArguments(jmxPort))
         .withStartupTimeout(Duration.ofMinutes(2))
         .waitingFor(Wait.forListeningPort());
   }

jmx-scraper/src/integrationTest/java/io/opentelemetry/contrib/jmxscraper/target_systems/CassandraIntegrationTest.java

@@ -18,24 +18,16 @@
 import org.assertj.core.api.MapAssert;
 import org.testcontainers.containers.GenericContainer;
 import org.testcontainers.containers.wait.strategy.Wait;
-import org.testcontainers.images.builder.ImageFromDockerfile;
 
 public class CassandraIntegrationTest extends TargetSystemIntegrationTest {
 
   @Override
   protected GenericContainer<?> createTargetContainer(int jmxPort) {
-    return new GenericContainer<>(
-            new ImageFromDockerfile()
-                .withDockerfileFromBuilder(builder -> builder.from("cassandra:5.0.2").build()))
-        .withEnv(
-            "JVM_EXTRA_OPTS",
-            " -Dcassandra.jmx.remote.port="
-                + jmxPort
-                + " -Dcom.sun.management.jmxremote.rmi.port="
-                + jmxPort
-                + " -Dcom.sun.management.jmxremote.local.only=false"
-                + " -Dcom.sun.management.jmxremote.ssl=false"
-                + " -Dcom.sun.management.jmxremote.authenticate=false")
+    return new GenericContainer<>("cassandra:5.0.2")
+        .withEnv("JVM_EXTRA_OPTS",
+            genericJmxJvmArguments(jmxPort)
+            // making cassandra startup faster for single node, from ~1min to ~15s
+            + " -Dcassandra.skip_wait_for_gossip_to_settle=0 -Dcassandra.initial_token=0")
         .withStartupTimeout(Duration.ofMinutes(2))
         .waitingFor(Wait.forLogMessage(".*Startup complete.*", 1));
   }