Read PID and version used in startup logging from the environment

See gh-41604

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/SpringApplication.java

@@ -336,7 +336,7 @@ public class SpringApplication {
 			afterRefresh(context, applicationArguments);
 			startup.started();
 			if (this.logStartupInfo) {
-				new StartupInfoLogger(this.mainApplicationClass).logStarted(getApplicationLog(), startup);
+				new StartupInfoLogger(this.mainApplicationClass, environment).logStarted(getApplicationLog(), startup);
 			}
 			listeners.started(context, startup.timeTakenToStarted());
 			callRunners(context, applicationArguments);
@@ -404,6 +404,7 @@ public class SpringApplication {
 		bootstrapContext.close(context);
 		if (this.logStartupInfo) {
 			logStartupInfo(context.getParent() == null);
+			logStartupInfo(context);
 			logStartupProfileInfo(context);
 		}
 		// Add boot specific singleton beans
@@ -633,14 +634,27 @@ public class SpringApplication {
 	/**
 	 * Called to log startup information, subclasses may override to add additional
 	 * logging.
-	 * @param isRoot true if this application is the root of a context hierarchy
+	 * @param context the application context
+	 * @since 3.4.0
 	 */
-	protected void logStartupInfo(boolean isRoot) {
+	protected void logStartupInfo(ConfigurableApplicationContext context) {
+		boolean isRoot = context.getParent() == null;
 		if (isRoot) {
-			new StartupInfoLogger(this.mainApplicationClass).logStarting(getApplicationLog());
+			new StartupInfoLogger(this.mainApplicationClass, context.getEnvironment()).logStarting(getApplicationLog());
 		}
 	}
 
+	/**
+	 * Called to log startup information, subclasses may override to add additional
+	 * logging.
+	 * @param isRoot true if this application is the root of a context hierarchy
+	 * @deprecated since 3.4.0 for removal in 3.6.0 in favor of
+	 * {@link #logStartupInfo(ConfigurableApplicationContext)}
+	 */
+	@Deprecated(since = "3.4.0", forRemoval = true)
+	protected void logStartupInfo(boolean isRoot) {
+	}
+
 	/**
 	 * Called to log active profile information.
 	 * @param context the application context

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/StartupInfoLogger.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,8 +23,8 @@ import org.apache.commons.logging.Log;
 import org.springframework.aot.AotDetector;
 import org.springframework.boot.SpringApplication.Startup;
 import org.springframework.boot.system.ApplicationHome;
-import org.springframework.boot.system.ApplicationPid;
 import org.springframework.context.ApplicationContext;
+import org.springframework.core.env.Environment;
 import org.springframework.core.log.LogMessage;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
@@ -41,8 +41,11 @@ class StartupInfoLogger {
 
 	private final Class<?> sourceClass;
 
-	StartupInfoLogger(Class<?> sourceClass) {
+	private final Environment environment;
+
+	StartupInfoLogger(Class<?> sourceClass, Environment environment) {
 		this.sourceClass = sourceClass;
+		this.environment = environment;
 	}
 
 	void logStarting(Log applicationLog) {
@@ -62,7 +65,7 @@ class StartupInfoLogger {
 		message.append("Starting");
 		appendAotMode(message);
 		appendApplicationName(message);
-		appendVersion(message, this.sourceClass);
+		appendApplicationVersion(message);
 		appendJavaVersion(message);
 		appendPid(message);
 		appendContext(message);
@@ -106,8 +109,12 @@ class StartupInfoLogger {
 		append(message, "v", () -> source.getPackage().getImplementationVersion());
 	}
 
+	private void appendApplicationVersion(StringBuilder message) {
+		append(message, "v", () -> this.environment.getProperty("spring.application.version"));
+	}
+
 	private void appendPid(StringBuilder message) {
-		append(message, "with PID ", ApplicationPid::new);
+		append(message, "with PID ", () -> this.environment.getProperty("spring.application.pid"));
 	}
 
 	private void appendContext(StringBuilder message) {

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/StartupInfoLoggerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,10 +17,11 @@
 package org.springframework.boot;
 
 import org.apache.commons.logging.Log;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.SpringApplication.Startup;
-import org.springframework.boot.system.ApplicationPid;
+import org.springframework.mock.env.MockEnvironment;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.ArgumentMatchers.assertArg;
@@ -39,15 +40,48 @@ class StartupInfoLoggerTests {
 
 	private final Log log = mock(Log.class);
 
+	private MockEnvironment environment;
+
+	@BeforeEach
+	void setUp() {
+		this.environment = new MockEnvironment();
+		this.environment.setProperty("spring.application.version", "1.2.3");
+		this.environment.setProperty("spring.application.pid", "42");
+	}
+
 	@Test
 	void startingFormat() {
 		given(this.log.isInfoEnabled()).willReturn(true);
-		new StartupInfoLogger(getClass()).logStarting(this.log);
+		new StartupInfoLogger(getClass(), this.environment).logStarting(this.log);
 		then(this.log).should()
-			.info(assertArg((message) -> assertThat(message.toString())
-				.contains("Starting " + getClass().getSimpleName() + " using Java " + System.getProperty("java.version")
-						+ " with PID " + new ApplicationPid() + " (started by " + System.getProperty("user.name")
-						+ " in " + System.getProperty("user.dir") + ")")));
+			.info(assertArg(
+					(message) -> assertThat(message.toString()).contains("Starting " + getClass().getSimpleName()
+							+ " v1.2.3 using Java " + System.getProperty("java.version") + " with PID 42 (started by "
+							+ System.getProperty("user.name") + " in " + System.getProperty("user.dir") + ")")));
+	}
+
+	@Test
+	void startingFormatWhenVersionIsNotAvailable() {
+		this.environment.setProperty("spring.application.version", "");
+		given(this.log.isInfoEnabled()).willReturn(true);
+		new StartupInfoLogger(getClass(), this.environment).logStarting(this.log);
+		then(this.log).should()
+			.info(assertArg(
+					(message) -> assertThat(message.toString()).contains("Starting " + getClass().getSimpleName()
+							+ " using Java " + System.getProperty("java.version") + " with PID 42 (started by "
+							+ System.getProperty("user.name") + " in " + System.getProperty("user.dir") + ")")));
+	}
+
+	@Test
+	void startingFormatWhenPidIsNotAvailable() {
+		this.environment.setProperty("spring.application.pid", "");
+		given(this.log.isInfoEnabled()).willReturn(true);
+		new StartupInfoLogger(getClass(), this.environment).logStarting(this.log);
+		then(this.log).should()
+			.info(assertArg(
+					(message) -> assertThat(message.toString()).contains("Starting " + getClass().getSimpleName()
+							+ " v1.2.3 using Java " + System.getProperty("java.version") + " (started by "
+							+ System.getProperty("user.name") + " in " + System.getProperty("user.dir") + ")")));
 	}
 
 	@Test
@@ -55,11 +89,11 @@ class StartupInfoLoggerTests {
 		System.setProperty("spring.aot.enabled", "true");
 		try {
 			given(this.log.isInfoEnabled()).willReturn(true);
-			new StartupInfoLogger(getClass()).logStarting(this.log);
+			new StartupInfoLogger(getClass(), this.environment).logStarting(this.log);
 			then(this.log).should()
 				.info(assertArg((message) -> assertThat(message.toString())
-					.contains("Starting AOT-processed " + getClass().getSimpleName() + " using Java "
-							+ System.getProperty("java.version") + " with PID " + new ApplicationPid() + " (started by "
+					.contains("Starting AOT-processed " + getClass().getSimpleName() + " v1.2.3 using Java "
+							+ System.getProperty("java.version") + " with PID 42 (started by "
 							+ System.getProperty("user.name") + " in " + System.getProperty("user.dir") + ")")));
 
 		}
@@ -71,7 +105,7 @@ class StartupInfoLoggerTests {
 	@Test
 	void startedFormat() {
 		given(this.log.isInfoEnabled()).willReturn(true);
-		new StartupInfoLogger(getClass()).logStarted(this.log, new TestStartup(1345L, "Started"));
+		new StartupInfoLogger(getClass(), this.environment).logStarted(this.log, new TestStartup(1345L, "Started"));
 		then(this.log).should()
 			.info(assertArg((message) -> assertThat(message.toString()).matches("Started " + getClass().getSimpleName()
 					+ " in \\d+\\.\\d{1,3} seconds \\(process running for 1.345\\)")));
@@ -80,7 +114,7 @@ class StartupInfoLoggerTests {
 	@Test
 	void startedWithoutUptimeFormat() {
 		given(this.log.isInfoEnabled()).willReturn(true);
-		new StartupInfoLogger(getClass()).logStarted(this.log, new TestStartup(null, "Started"));
+		new StartupInfoLogger(getClass(), this.environment).logStarted(this.log, new TestStartup(null, "Started"));
 		then(this.log).should()
 			.info(assertArg((message) -> assertThat(message.toString())
 				.matches("Started " + getClass().getSimpleName() + " in \\d+\\.\\d{1,3} seconds")));
@@ -89,7 +123,7 @@ class StartupInfoLoggerTests {
 	@Test
 	void restoredFormat() {
 		given(this.log.isInfoEnabled()).willReturn(true);
-		new StartupInfoLogger(getClass()).logStarted(this.log, new TestStartup(null, "Restored"));
+		new StartupInfoLogger(getClass(), this.environment).logStarted(this.log, new TestStartup(null, "Restored"));
 		then(this.log).should()
 			.info(assertArg((message) -> assertThat(message.toString())
 				.matches("Restored " + getClass().getSimpleName() + " in \\d+\\.\\d{1,3} seconds")));