Merge pull request #13148 from izeye:polish-20180512

* pr/13148:
  Polish

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

@@ -256,6 +256,7 @@ public abstract class AbstractRunMojo extends AbstractDependencyFilterMojo {
 	 * @see #enableForkByDefault()
 	 */
 	protected void logDisabledFork() {
+		if (getLog().isWarnEnabled()) {
 			if (hasAgent()) {
 				getLog().warn("Fork mode disabled, ignoring agent");
 			}
@@ -269,6 +270,7 @@ public abstract class AbstractRunMojo extends AbstractDependencyFilterMojo {
 				getLog().warn("Fork mode disabled, ignoring working directory configuration");
 			}
 		}
+	}
 
 	private void doRunWithForkedJvm(String startClassName)
 			throws MojoExecutionException, MojoFailureException {
@@ -338,7 +340,7 @@ public abstract class AbstractRunMojo extends AbstractDependencyFilterMojo {
 	 * @return a {@link RunArguments} defining the JVM arguments
 	 */
 	protected RunArguments resolveJvmArguments() {
-		final StringBuilder stringBuilder = new StringBuilder();
+		StringBuilder stringBuilder = new StringBuilder();
 		if (this.systemPropertyVariables != null) {
 			stringBuilder.append(this.systemPropertyVariables.entrySet().stream()
 					.map((e) -> SystemPropertyFormatter.format(e.getKey(), e.getValue()))
@@ -358,7 +360,9 @@ public abstract class AbstractRunMojo extends AbstractDependencyFilterMojo {
 
 	private void addAgents(List<String> args) {
 		if (this.agent != null) {
+			if (getLog().isInfoEnabled()) {
 				getLog().info("Attaching agents: " + Arrays.asList(this.agent));
+			}
 			for (File agent : this.agent) {
 				args.add("-javaagent:" + agent);
 			}
@@ -390,7 +394,9 @@ public abstract class AbstractRunMojo extends AbstractDependencyFilterMojo {
 						.append((classpath.length() > 0 ? File.pathSeparator : "")
 								+ new File(ele.toURI()));
 			}
+			if (getLog().isDebugEnabled()) {
 				getLog().debug("Classpath for forked process: " + classpath);
+			}
 			args.add("-cp");
 			args.add(classpath.toString());
 		}
@@ -468,11 +474,9 @@ public abstract class AbstractRunMojo extends AbstractDependencyFilterMojo {
 	}
 
 	private void logArguments(String message, String[] args) {
-		StringBuilder sb = new StringBuilder(message);
-		for (String arg : args) {
-			sb.append(arg).append(" ");
+		if (getLog().isDebugEnabled()) {
+			getLog().debug(Arrays.stream(args).collect(Collectors.joining(" ", message, "")));
 		}
-		getLog().debug(sb.toString().trim());
 	}
 
 	private static class TestArtifactFilter extends AbstractArtifactFeatureFilter {
@@ -569,11 +573,11 @@ public abstract class AbstractRunMojo extends AbstractDependencyFilterMojo {
 	 */
 	static class SystemPropertyFormatter {
 
-		public static String format(Object key, Object value) {
+		public static String format(String key, String value) {
 			if (key == null) {
 				return "";
 			}
-			if (value == null || String.valueOf(value).isEmpty()) {
+			if (value == null || value.isEmpty()) {
 				return String.format("-D%s", key);
 			}
 			return String.format("-D%s=\"%s\"", key, value);

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/site/apt/examples/run-env-variables.apt.vm

@@ -40,7 +40,7 @@ Dmytro Nosan
 
   If the value is empty or not defined (i.e. <<<<MY_ENV/>>>>), the env variable is set
   with an empty String as the value. Maven trims values specified in the pom so it is
-  not possible to specify a env variable who needs to start or end with a space.
+  not possible to specify an env variable which needs to start or end with a space.
 
   Any String typed Maven variable can be passed as system properties. Any attempt to pass
   any other Maven variable type (e.g. a <<<List>>> or a <<<URL>>> variable) will cause the

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/site/apt/examples/run-system-properties.apt.vm

@@ -27,7 +27,7 @@
           <systemPropertyVariables>
             <property1>test</property1>
             <property2>${my.value}</property2>
-          </profiles>
+          </systemPropertyVariables>
         </configuration>
         ...
       </plugin>
@@ -41,7 +41,7 @@
 
   If the value is empty or not defined (i.e. <<<<my-property/>>>>), the system property
   is set with an empty String as the value. Maven trims values specified in the pom so it
-  is not possible to specify a System property who needs to start or end with a space via
+  is not possible to specify a System property which needs to start or end with a space via
   this mechanism: consider using <<<jvmArguments>>> instead.
 
   Any String typed Maven variable can be passed as system properties. Any attempt to pass

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/SystemPropertyFormatterTests.java

@@ -49,7 +49,7 @@ public class SystemPropertyFormatterTests {
 	}
 
 	@Test
-	public void parseKeyWithOnlySpace() {
+	public void parseKeyWithOnlySpaces() {
 		assertThat(SystemPropertyFormatter.format("key1", "   "))
 				.isEqualTo("-Dkey1=\"   \"");
 	}