initial project setup

services/api-gateway/src/main/java/com/labfusion/model/DeviceState.java

@@ -0,0 +1,64 @@
+package com.labfusion.model;
+
+import jakarta.persistence.*;
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "device_states")
+public class DeviceState {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    
+    @Column(name = "timestamp", nullable = false)
+    private LocalDateTime timestamp;
+    
+    @Column(name = "entity_id", nullable = false)
+    private String entityId;
+    
+    @Column(name = "value", columnDefinition = "TEXT")
+    private String value;
+    
+    @Column(name = "service", nullable = false)
+    private String service;
+    
+    @Column(name = "created_at")
+    private LocalDateTime createdAt;
+    
+    @PrePersist
+    protected void onCreate() {
+        createdAt = LocalDateTime.now();
+        if (timestamp == null) {
+            timestamp = LocalDateTime.now();
+        }
+    }
+    
+    // Constructors
+    public DeviceState() {}
+    
+    public DeviceState(String entityId, String value, String service) {
+        this.entityId = entityId;
+        this.value = value;
+        this.service = service;
+        this.timestamp = LocalDateTime.now();
+    }
+    
+    // Getters and Setters
+    public Long getId() { return id; }
+    public void setId(Long id) { this.id = id; }
+    
+    public LocalDateTime getTimestamp() { return timestamp; }
+    public void setTimestamp(LocalDateTime timestamp) { this.timestamp = timestamp; }
+    
+    public String getEntityId() { return entityId; }
+    public void setEntityId(String entityId) { this.entityId = entityId; }
+    
+    public String getValue() { return value; }
+    public void setValue(String value) { this.value = value; }
+    
+    public String getService() { return service; }
+    public void setService(String service) { this.service = service; }
+    
+    public LocalDateTime getCreatedAt() { return createdAt; }
+    public void setCreatedAt(LocalDateTime createdAt) { this.createdAt = createdAt; }
+}