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Fix message bus not handling base classes and interfaces, rename defa…
…ult implementations of some systems, add more tests
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161 changes: 161 additions & 0 deletions
161
Packages/com.chark.game-management/Runtime/Messaging/DefaultMessageBus.cs
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,161 @@ | ||
using System; | ||
using System.Collections.Generic; | ||
using CHARK.GameManagement.Utilities; | ||
|
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namespace CHARK.GameManagement.Messaging | ||
{ | ||
internal sealed class DefaultMessageBus : IMessageBus | ||
{ | ||
private readonly IDictionary<Type, Type[]> interfacesByListenerTypeCache = | ||
new Dictionary<Type, Type[]>(); | ||
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private readonly IDictionary<Type, MessageListener> listenersByType = | ||
new Dictionary<Type, MessageListener>(); | ||
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public int CachedTypeCount => interfacesByListenerTypeCache.Count; | ||
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public int MessageListenerCount => listenersByType.Count; | ||
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public int TotalListenerCount | ||
{ | ||
get | ||
{ | ||
var totalListenerCount = 0; | ||
foreach (var messageListener in listenersByType.Values) | ||
{ | ||
totalListenerCount += messageListener.ListenerCount; | ||
} | ||
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return totalListenerCount; | ||
} | ||
} | ||
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public void Publish<TMessage>(TMessage message) where TMessage : IMessage | ||
{ | ||
#if UNITY_EDITOR | ||
if (message == null) | ||
{ | ||
Logging.LogError($"Message of type {typeof(TMessage)} cannot be null", GetType()); | ||
return; | ||
} | ||
#endif | ||
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if (TryGetListener<TMessage>(out var messageListener) == false) | ||
{ | ||
#if UNITY_EDITOR | ||
Logging.LogWarning($"Could not find a listener for {typeof(TMessage)}", GetType()); | ||
#endif | ||
return; | ||
} | ||
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messageListener.Raise(message); | ||
} | ||
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public void AddListener<TMessage>(OnMessageReceived<TMessage> listener) where TMessage : IMessage | ||
{ | ||
#if UNITY_EDITOR | ||
if (listener == null) | ||
{ | ||
Logging.LogError($"Listener of type {typeof(TMessage)} cannot be null", GetType()); | ||
return; | ||
} | ||
#endif | ||
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var listenerType = typeof(TMessage); | ||
if (TryGetListener<TMessage>(out var messageListener)) | ||
{ | ||
messageListener.AddListener(listener); | ||
return; | ||
} | ||
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var newMessageListener = new MessageListener(); | ||
newMessageListener.AddListener(listener); | ||
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listenersByType[listenerType] = newMessageListener; | ||
} | ||
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public void RemoveListener<TMessage>(OnMessageReceived<TMessage> listener) where TMessage : IMessage | ||
{ | ||
#if UNITY_EDITOR | ||
if (listener == null) | ||
{ | ||
Logging.LogError($"Listener of type {typeof(TMessage)} cannot be null", GetType()); | ||
return; | ||
} | ||
#endif | ||
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var listenerType = typeof(TMessage); | ||
if (TryGetListener<TMessage>(out var messageListener) == false) | ||
{ | ||
#if UNITY_EDITOR | ||
Logging.LogWarning($"Could not find a listener for {typeof(TMessage)}", GetType()); | ||
#endif | ||
return; | ||
} | ||
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messageListener.RemoveListener(listener); | ||
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if (messageListener.ListenerCount == 0) | ||
{ | ||
interfacesByListenerTypeCache.Remove(listenerType); | ||
listenersByType.Remove(listenerType); | ||
} | ||
} | ||
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private bool TryGetListener<TMessage>(out MessageListener listener) where TMessage : IMessage | ||
{ | ||
var listenerType = typeof(TMessage); | ||
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// Simple base type listener, the most common case | ||
{ | ||
if (listenersByType.TryGetValue(listenerType, out listener)) | ||
{ | ||
return true; | ||
} | ||
} | ||
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// Look up base types (abstract classes and such) | ||
{ | ||
var listenerBaseType = listenerType.BaseType; | ||
while (listenerBaseType != null && typeof(IMessage).IsAssignableFrom(listenerBaseType)) | ||
{ | ||
if (listenersByType.TryGetValue(listenerBaseType, out listener)) | ||
{ | ||
return true; | ||
} | ||
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listenerBaseType = listenerBaseType.BaseType; | ||
} | ||
} | ||
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// Look up interfaces | ||
{ | ||
// ReSharper disable once InlineOutVariableDeclaration | ||
Type[] interfaceTypes; | ||
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if (interfacesByListenerTypeCache.TryGetValue(listenerType, out interfaceTypes) == false) | ||
{ | ||
interfaceTypes = listenerType.GetInterfaces(); | ||
interfacesByListenerTypeCache[listenerType] = interfaceTypes; | ||
} | ||
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// ReSharper disable once ForCanBeConvertedToForeach | ||
for (var index = 0; index < interfaceTypes.Length; index++) | ||
{ | ||
var interfaceType = interfaceTypes[index]; | ||
if (typeof(IMessage).IsAssignableFrom(interfaceType) == false) | ||
{ | ||
continue; | ||
} | ||
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if (listenersByType.TryGetValue(interfaceType, out listener)) | ||
{ | ||
return true; | ||
} | ||
} | ||
} | ||
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return false; | ||
} | ||
} | ||
} |
File renamed without changes.
4 changes: 4 additions & 0 deletions
4
Packages/com.chark.game-management/Runtime/Messaging/Delegates.cs
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,4 @@ | ||
namespace CHARK.GameManagement.Messaging | ||
{ | ||
public delegate void OnMessageReceived<in TMessage>(TMessage message) where TMessage : IMessage; | ||
} |
3 changes: 3 additions & 0 deletions
3
Packages/com.chark.game-management/Runtime/Messaging/Delegates.cs.meta
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82 changes: 0 additions & 82 deletions
82
Packages/com.chark.game-management/Runtime/Messaging/MessageBus.cs
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