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src/main/java/com/auction/AuctionMonitorHealthCheck.java

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+package com.auction;
+
+import jakarta.enterprise.context.ApplicationScoped;
+import jakarta.inject.Inject;
+import org.eclipse.microprofile.health.HealthCheck;
+import org.eclipse.microprofile.health.HealthCheckResponse;
+import org.eclipse.microprofile.health.Liveness;
+import org.eclipse.microprofile.health.Readiness;
+
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+/**
+ * Health checks for Auction Monitor.
+ * Provides liveness and readiness probes for Kubernetes/Docker deployment.
+ */
+@ApplicationScoped
+public class AuctionMonitorHealthCheck {
+
+    @Inject
+    DatabaseService db;
+
+    /**
+     * Liveness probe - checks if application is alive
+     * GET /health/live
+     */
+    @Liveness
+    public static class LivenessCheck implements HealthCheck {
+        @Override
+        public HealthCheckResponse call() {
+            return HealthCheckResponse.up("Auction Monitor is alive");
+        }
+    }
+
+    /**
+     * Readiness probe - checks if application is ready to serve requests
+     * GET /health/ready
+     */
+    @Readiness
+    @ApplicationScoped
+    public static class ReadinessCheck implements HealthCheck {
+
+        @Inject
+        DatabaseService db;
+
+        @Override
+        public HealthCheckResponse call() {
+            try {
+                // Check database connection
+                var auctions = db.getAllAuctions();
+
+                // Check database path exists
+                var dbPath = Paths.get("C:\\mnt\\okcomputer\\output\\cache.db");
+                if (!Files.exists(dbPath.getParent())) {
+                    return HealthCheckResponse.down("Database directory does not exist");
+                }
+
+                return HealthCheckResponse.named("database")
+                    .up()
+                    .withData("auctions", auctions.size())
+                    .build();
+
+            } catch (Exception e) {
+                return HealthCheckResponse.named("database")
+                    .down()
+                    .withData("error", e.getMessage())
+                    .build();
+            }
+        }
+    }
+
+    /**
+     * Startup probe - checks if application has started correctly
+     * GET /health/started
+     */
+    @org.eclipse.microprofile.health.Startup
+    @ApplicationScoped
+    public static class StartupCheck implements HealthCheck {
+
+        @Inject
+        DatabaseService db;
+
+        @Override
+        public HealthCheckResponse call() {
+            try {
+                // Verify database schema
+                db.ensureSchema();
+
+                return HealthCheckResponse.named("startup")
+                    .up()
+                    .withData("message", "Database schema initialized")
+                    .build();
+
+            } catch (Exception e) {
+                return HealthCheckResponse.named("startup")
+                    .down()
+                    .withData("error", e.getMessage())
+                    .build();
+            }
+        }
+    }
+}