feat: 라이브러리 사용 시 초기화 메세지를 통해 설정 정보를 출력하도록 구현

handler/src/main/java/io/jeyong/handler/SigtermHandlerConfiguration.java

@@ -1,5 +1,9 @@
 package io.jeyong.handler;
 
+import jakarta.annotation.PostConstruct;
+import org.apache.logging.log4j.util.Strings;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.ApplicationContext;
@@ -16,6 +20,7 @@
 @EnableConfigurationProperties(SigtermHandlerProperties.class)
 public class SigtermHandlerConfiguration {
 
+    private static final Logger logger = LoggerFactory.getLogger(SigtermHandlerConfiguration.class);
     private static final String SIGNAL_TYPE = "TERM";
 
     private final SigtermHandlerProperties sigtermHandlerProperties;
@@ -24,6 +29,19 @@ public SigtermHandlerConfiguration(final SigtermHandlerProperties sigtermHandler
         this.sigtermHandlerProperties = sigtermHandlerProperties;
     }
 
+    @PostConstruct
+    public void logInitialization() {
+        if (Strings.isBlank(sigtermHandlerProperties.getTerminationMessagePath())) {
+            logger.info("Sigterm handler initialized with exitCode: {}", sigtermHandlerProperties.getExitCode());
+        } else {
+            logger.info(
+                    "Sigterm handler initialized with exitCode: {}, terminationMessagePath: {}, terminationMessage: '{}'",
+                    sigtermHandlerProperties.getExitCode(),
+                    sigtermHandlerProperties.getTerminationMessagePath(),
+                    sigtermHandlerProperties.getTerminationMessage());
+        }
+    }
+
     @Bean
     public ApplicationTerminator applicationTerminator(final ApplicationContext applicationContext) {
         return new SpringContextTerminator(applicationContext, sigtermHandlerProperties.getExitCode(),