Optimize debug level logs

See gh-18604

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/batch/JobLauncherCommandLineRunner.java

@@ -174,7 +174,9 @@ public class JobLauncherCommandLineRunner implements CommandLineRunner, Ordered,
 			if (StringUtils.hasText(this.jobNames)) {
 				String[] jobsToRun = this.jobNames.split(",");
 				if (!PatternMatchUtils.simpleMatch(jobsToRun, job.getName())) {
-					logger.debug("Skipped job: " + job.getName());
+					if (logger.isDebugEnabled()) {
+						logger.debug("Skipped job: " + job.getName());
+					}
 					continue;
 				}
 			}
@@ -194,7 +196,9 @@ public class JobLauncherCommandLineRunner implements CommandLineRunner, Ordered,
 					execute(job, jobParameters);
 				}
 				catch (NoSuchJobException ex) {
-					logger.debug("No job found in registry for job name: " + jobName);
+					if (logger.isDebugEnabled()) {
+						logger.debug("No job found in registry for job name: " + jobName);
+					}
 				}
 			}
 		}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jms/artemis/ArtemisEmbeddedConfigurationFactory.java

@@ -63,7 +63,7 @@ class ArtemisEmbeddedConfigurationFactory {
 		TransportConfiguration transportConfiguration = new TransportConfiguration(InVMAcceptorFactory.class.getName(),
 				this.properties.generateTransportParameters());
 		configuration.getAcceptorConfigurations().add(transportConfiguration);
-		if (this.properties.isDefaultClusterPassword()) {
+		if (this.properties.isDefaultClusterPassword() && logger.isDebugEnabled()) {
 			logger.debug("Using default Artemis cluster password: " + this.properties.getClusterPassword());
 		}
 		configuration.setClusterPassword(this.properties.getClusterPassword());

spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/livereload/Connection.java

@@ -68,7 +68,9 @@ class Connection {
 		this.inputStream = new ConnectionInputStream(inputStream);
 		this.outputStream = new ConnectionOutputStream(outputStream);
 		this.header = this.inputStream.readHeader();
-		logger.debug("Established livereload connection [" + this.header + "]");
+		if (logger.isDebugEnabled()) {
+			logger.debug("Established livereload connection [" + this.header + "]");
+		}
 	}
 
 	/**
@@ -107,7 +109,9 @@ class Connection {
 				throw new ConnectionClosedException();
 			}
 			else if (frame.getType() == Frame.Type.TEXT) {
-				logger.debug("Received LiveReload text frame " + frame);
+				if (logger.isDebugEnabled()) {
+					logger.debug("Received LiveReload text frame " + frame);
+				}
 			}
 			else {
 				throw new IOException("Unexpected Frame Type " + frame.getType());

spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/livereload/LiveReloadServer.java

@@ -109,7 +109,9 @@ public class LiveReloadServer {
 	public int start() throws IOException {
 		synchronized (this.monitor) {
 			Assert.state(!isStarted(), "Server already started");
-			logger.debug("Starting live reload server on port " + this.port);
+			if (logger.isDebugEnabled()) {
+				logger.debug("Starting live reload server on port " + this.port);
+			}
 			this.serverSocket = new ServerSocket(this.port);
 			int localPort = this.serverSocket.getLocalPort();
 			this.listenThread = this.threadFactory.newThread(this::acceptConnections);

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/diagnostics/FailureAnalyzers.java

@@ -113,7 +113,9 @@ final class FailureAnalyzers implements SpringBootExceptionReporter {
 				}
 			}
 			catch (Throwable ex) {
-				logger.debug("FailureAnalyzer " + analyzer + " failed", ex);
+				if (logger.isDebugEnabled()) {
+					logger.debug("FailureAnalyzer " + analyzer + " failed", ex);
+				}
 			}
 		}
 		return null;