feat: 헬스 상태 수동 변경 컨트롤러 구현

server/src/main/java/com/ticketing/server/global/health/L7checkController.java

@@ -0,0 +1,44 @@
+package com.ticketing.server.global.health;
+
+import javax.servlet.http.HttpServletRequest;
+import lombok.RequiredArgsConstructor;
+import org.springframework.boot.actuate.health.Health;
+import org.springframework.boot.actuate.health.Status;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/l7check")
+@RequiredArgsConstructor
+public class L7checkController {
+
+	private final MutableHealthIndicator indicator;
+
+	@GetMapping
+	public ResponseEntity health() {
+		Health health = indicator.health();
+		boolean isUp = health.getStatus().equals(Status.UP);
+		return ResponseEntity
+			.status(isUp ? HttpStatus.OK : HttpStatus.SERVICE_UNAVAILABLE)
+			.build();
+	}
+
+	@DeleteMapping
+	@ResponseStatus(HttpStatus.NO_CONTENT)
+	public void down(HttpServletRequest request) {
+		indicator.setHealth(Health.down().build());
+	}
+
+	@PostMapping
+	@ResponseStatus(HttpStatus.CREATED)
+	public void up(HttpServletRequest request) {
+		indicator.setHealth(Health.up().build());
+	}
+
+}

server/src/main/java/com/ticketing/server/global/health/ManualHealthIndicator.java

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+package com.ticketing.server.global.health;
+
+import java.util.concurrent.atomic.AtomicReference;
+import org.springframework.boot.actuate.health.Health;
+
+public class ManualHealthIndicator implements MutableHealthIndicator {
+
+	private final AtomicReference<Health> healthRef = new AtomicReference<>(Health.up().build());
+
+	@Override
+	public void setHealth(Health health) {
+		healthRef.set(health);
+	}
+
+	@Override
+	public Health health() {
+		return healthRef.get();
+	}
+
+}

server/src/main/java/com/ticketing/server/global/health/MutableHealthIndicator.java

@@ -0,0 +1,10 @@
+package com.ticketing.server.global.health;
+
+import org.springframework.boot.actuate.health.Health;
+import org.springframework.boot.actuate.health.HealthIndicator;
+
+public interface MutableHealthIndicator extends HealthIndicator {
+
+	void setHealth(Health health);
+
+}