BAEL-5691: Log properties in Spring Boot application (#12663)

* BAEL-5691: Log properties in Spring Boot application

* removed lombok

* merged 2 streams into one

* removed unnecessary exception handling

spring-boot-modules/spring-boot-properties-3/pom.xml

@@ -19,6 +19,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

spring-boot-modules/spring-boot-properties-3/src/main/java/com/baeldung/properties/log/AppContextRefreshedEventPropertiesPrinter.java

@@ -0,0 +1,55 @@
+package com.baeldung.properties.log;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.event.ContextRefreshedEvent;
+import org.springframework.context.event.EventListener;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.MapPropertySource;
+import org.springframework.stereotype.Component;
+
+import java.util.Collection;
+
+@Component
+public class AppContextRefreshedEventPropertiesPrinter {
+    private static final Logger LOGGER = LoggerFactory.getLogger(AppContextRefreshedEventPropertiesPrinter.class);
+
+    @EventListener
+    public void handleContextRefreshed(ContextRefreshedEvent event) {
+        printAllActiveProperties((ConfigurableEnvironment) event.getApplicationContext().getEnvironment());
+
+        printAllApplicationProperties((ConfigurableEnvironment) event.getApplicationContext().getEnvironment());
+    }
+
+    private void printAllActiveProperties(ConfigurableEnvironment env) {
+
+        LOGGER.info("************************* ALL PROPERTIES(EVENT) ******************************");
+
+        env.getPropertySources()
+                .stream()
+                .filter(ps -> ps instanceof MapPropertySource)
+                .map(ps -> ((MapPropertySource) ps).getSource().keySet())
+                .flatMap(Collection::stream)
+                .distinct()
+                .sorted()
+                .forEach(key -> LOGGER.info("{}={}", key, env.getProperty(key)));
+
+        LOGGER.info("******************************************************************************");
+    }
+
+    private void printAllApplicationProperties(ConfigurableEnvironment env) {
+
+        LOGGER.info("************************* APP PROPERTIES(EVENT) ******************************");
+
+        env.getPropertySources()
+                .stream()
+                .filter(ps -> ps instanceof MapPropertySource && ps.getName().contains("application.properties"))
+                .map(ps -> ((MapPropertySource) ps).getSource().keySet())
+                .flatMap(Collection::stream)
+                .distinct()
+                .sorted()
+                .forEach(key -> LOGGER.info("{}={}", key, env.getProperty(key)));
+
+        LOGGER.info("******************************************************************************");
+    }
+}

spring-boot-modules/spring-boot-properties-3/src/main/java/com/baeldung/properties/log/EnvironmentPropertiesPrinter.java

@@ -0,0 +1,29 @@
+package com.baeldung.properties.log;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+import javax.annotation.PostConstruct;
+
+@Component
+public class EnvironmentPropertiesPrinter {
+    private static final Logger LOGGER = LoggerFactory.getLogger(EnvironmentPropertiesPrinter.class);
+    private final Environment env;
+
+    public EnvironmentPropertiesPrinter(Environment env) {
+        this.env = env;
+    }
+
+    @PostConstruct
+    public void logApplicationProperties() {
+        LOGGER.info("************************* PROPERTIES(ENVIRONMENT) ******************************");
+
+        LOGGER.info("{}={}", "bael.property", env.getProperty("bael.property"));
+        LOGGER.info("{}={}", "app.name", env.getProperty("app.name"));
+        LOGGER.info("{}={}", "app.description", env.getProperty("app.description"));
+
+        LOGGER.info("******************************************************************************");
+    }
+}

spring-boot-modules/spring-boot-properties-3/src/main/java/com/baeldung/properties/log/LogPropertiesDemoApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.properties.log;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class LogPropertiesDemoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(LogPropertiesDemoApplication.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-properties-3/src/main/resources/application.yml

@@ -55,3 +55,9 @@ application:
       uk: 14
       fr: 42
       us: 10
+---
+management:
+  endpoints:
+    web:
+      exposure:
+        include: env, health