Polish "Default to optimized launch of the JVM when using spring-boot:run"

Closes gh-16941

Author: snicoll

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/it/run-fork/invoker.properties

@@ -0,0 +1 @@
+invoker.goals=clean verify -X

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/it/run-fork/verify.groovy

@@ -1,3 +1,6 @@
+import static org.junit.Assert.assertTrue
+
 def file = new File(basedir, "build.log")
-return file.text.contains("I haz been run from '$basedir'")
+assertTrue file.text.contains("I haz been run from '$basedir'")
+assertTrue file.text.contains("JVM argument(s): -Xverify:none -XX:TieredStopAtLevel=1")
 

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/RunMojo.java

@@ -19,7 +19,6 @@
 import java.io.File;
 import java.net.URL;
 import java.net.URLClassLoader;
-import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 
@@ -55,8 +54,12 @@ public class RunMojo extends AbstractRunMojo {
 	 */
 	private Boolean hasDevtools;
 
+	/**
+	 * Whether the JVM's launch should be optimized.
+	 * @since 2.2.0
+	 */
 	@Parameter(property = "optimizedLaunch", defaultValue = "true")
-	private boolean optimizedLaunch = true;
+	private boolean optimizedLaunch;
 
 	@Override
 	@Deprecated
@@ -72,13 +75,19 @@ protected void logDisabledFork() {
 		}
 	}
 
+	@Override
+	protected RunArguments resolveJvmArguments() {
+		RunArguments jvmArguments = super.resolveJvmArguments();
+		if (isFork() && this.optimizedLaunch) {
+			jvmArguments.getArgs().addFirst("-XX:TieredStopAtLevel=1");
+			jvmArguments.getArgs().addFirst("-Xverify:none");
+		}
+		return jvmArguments;
+	}
+
 	@Override
 	protected void runWithForkedJvm(File workingDirectory, List<String> args,
 			Map<String, String> environmentVariables) throws MojoExecutionException {
-		if (this.optimizedLaunch) {
-			String[] optimizedLaunchArgs = { "-Xverify:none", "-XX:TieredStopAtLevel=1" };
-			Collections.addAll(args, optimizedLaunchArgs);
-		}
 		int exitCode = forkJvm(workingDirectory, args, environmentVariables);
 		if (exitCode == 0 || exitCode == EXIT_CODE_SIGINT) {
 			return;