✨ 파이어베이스 자동 초기화 (#120)

src/main/java/com/tickettogether/global/fcm/FCMInitializer.java

@@ -0,0 +1,39 @@
+package com.tickettogether.global.fcm;
+
+import com.google.auth.oauth2.GoogleCredentials;
+import com.google.firebase.FirebaseApp;
+import com.google.firebase.FirebaseOptions;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.stereotype.Component;
+
+import javax.annotation.PostConstruct;
+import java.io.IOException;
+import java.io.InputStream;
+
+@Component
+@Slf4j
+public class FCMInitializer {
+
+    @Value("${fcm.certification}")
+    private String googleApplicationCredentials;
+
+    @PostConstruct
+    public void initialize() throws IOException {
+        ClassPathResource resource = new ClassPathResource(googleApplicationCredentials);
+        try (InputStream is = resource.getInputStream()){
+            FirebaseOptions options = FirebaseOptions.builder()
+                    .setCredentials(GoogleCredentials.fromStream(is))
+                    .build();
+
+            if (FirebaseApp.getApps().isEmpty()) {
+                FirebaseApp.initializeApp(options);
+                log.info("FirebaseApp initialization complete");
+            }
+        }catch(Exception ex){
+            log.info(ex.getMessage());
+        }
+    }
+}
+