加入服务定位器模式 | add Service Locator Pattern

加入服务定位器模式 | add Service Locator Pattern

Assets/Game Programming Patterns/Service Locator Pattern/Example/ServiceLocatorPatternExample.cs

@@ -0,0 +1,194 @@
+//-------------------------------------------------------------------------------------
+//	ServiceLocatorPatternExample.cs
+//-------------------------------------------------------------------------------------
+
+using UnityEngine;
+using System.Collections;
+using System;
+
+namespace ServiceLocatorPatternExample
+{
+    public class ServiceLocatorPatternExample : MonoBehaviour
+    {
+        void Start()
+        {
+            //注册到服务定位器
+            TheAudioPlayer audio = new TheAudioPlayer();
+            ServiceLocator.RegisterService(audio);
+        }
+
+        void Update()
+        {
+            //播放声音
+            if (Input.GetKeyDown(KeyCode.Alpha1))
+            {
+                var audio=ServiceLocator.GetAudioService();
+                if (audio!=null)
+                {
+                    audio.PlaySound(1);
+                }
+            }
+
+            //结束声音
+            if (Input.GetKeyDown(KeyCode.Alpha2))
+            {
+                var audio = ServiceLocator.GetAudioService();
+                if (audio != null)
+                {
+                    audio.StopSound(1);
+                }
+            }
+
+            //结束所有声音
+            if (Input.GetKeyDown(KeyCode.Alpha3))
+            {
+                var audio = ServiceLocator.GetAudioService();
+                if (audio != null)
+                {
+                    audio.StopAllSounds();
+                }
+            }
+
+            //注册日志音频类
+            if (Input.GetKeyDown(KeyCode.Alpha4))
+            {
+                ServiceLocator.EnableAudioLogging();
+            }
+        }
+
+
+    }
+
+
+
+    /// <summary>
+    /// 服务定位器管理类
+    /// </summary>
+    public class ServiceLocator
+    {
+        static IAudio AudioService_;
+        static NullAudio NullAudioService_;
+
+        public static IAudio GetAudioService() { return AudioService_; }
+
+        /// <summary>
+        /// 注册服务
+        /// </summary>
+        /// <param name="service"></param>
+        public static void RegisterService(IAudio service)
+        {
+            if (service == null)
+            {
+                // Revert to null service.
+                AudioService_ = NullAudioService_;
+            }
+            else
+            {
+                AudioService_ = service;
+            }
+            Debug.Log("[ServiceLocator]Finish Register Service!");
+        }
+
+        /// <summary>
+        ///  注册带日志的音频类
+        /// </summary>
+        public static void EnableAudioLogging()
+        {
+            // Decorate the existing service.
+            IAudio service = new LoggedAudio(ServiceLocator.GetAudioService());
+
+            // Swap it in.
+            RegisterService(service);
+        }
+
+    }
+
+
+
+    /// <summary>
+    ///音频接口 
+    /// </summary>
+    public interface IAudio
+    {
+        void PlaySound(int soundID);
+        void StopSound(int soundID);
+        void StopAllSounds();
+    };
+
+    /// <summary>
+    /// 实际的播放音频的实现类
+    /// </summary>
+    public class TheAudioPlayer : IAudio
+    {
+        public void PlaySound(int soundID)
+        {
+            // Play sound using console audio api...
+            Debug.Log("Play Sound ! ID = "+soundID.ToString());
+        }
+
+        public void StopSound(int soundID)
+        {
+            // Stop sound using console audio api...
+            Debug.Log("Stop Sound ! ID = " + soundID.ToString());
+        }
+
+        public void StopAllSounds()
+        {
+            // Stop all sounds using console audio api...
+            Debug.Log("Stop All Sound ! ");
+        }
+    };
+
+    /// <summary>
+    ///  null音频类
+    /// </summary>
+    public class NullAudio : IAudio
+    {
+        public void PlaySound(int soundID) { /* Do nothing. */ }
+        public void StopSound(int soundID) { /* Do nothing. */ }
+        public void StopAllSounds() { /* Do nothing. */ }
+    };
+
+    /// <summary>
+    /// 带日志的音频类
+    /// </summary>
+    class LoggedAudio : IAudio
+    {
+
+        IAudio wrapped_;
+        public LoggedAudio(IAudio wrapped)
+        {
+            wrapped_ = wrapped;
+        }
+
+        public void PlaySound(int soundID)
+        {
+            Log("[LoggedAudio]Play sound!");
+            wrapped_.PlaySound(soundID);
+        }
+
+        public void StopSound(int soundID)
+        {
+            Log("[LoggedAudio]Stop sound!");
+            wrapped_.StopSound(soundID);
+        }
+
+        public void StopAllSounds()
+        {
+            Log("[LoggedAudio]Stop all sounds!");
+            wrapped_.StopAllSounds();
+        }
+
+        private void Log(string message)
+        {
+            Debug.LogError(message);
+            // Code to log message...
+        }
+    }
+
+
+
+}
+
+
+