#11 - Include service loading into HttpClientContext.create() mechanism

Author: rbygrave

client/src/main/java/io/avaje/http/client/DHttpApi.java

@@ -34,16 +34,31 @@ void addProvider(HttpApiProvider apiProvider) {
     providerMap.put(apiProvider.type(), apiProvider);
   }
 
+  @SuppressWarnings("unchecked")
+  private <T> HttpApiProvider<T> lookup(Class<T> type) {
+    return (HttpApiProvider<T>) providerMap.get(type);
+  }
+
   @SuppressWarnings("unchecked")
   <T> T provideFor(Class<T> type, HttpClientContext clientContext) {
-    final HttpApiProvider<T> apiProvider = (HttpApiProvider<T>) providerMap.get(type);
+    final HttpApiProvider<T> apiProvider = lookup(type);
     if (apiProvider == null) {
       throw new IllegalArgumentException("No registered HttpApiProvider for type: " + type);
     }
     return apiProvider.provide(clientContext);
   }
 
+  /**
+   * Return the client implementation via service loading.
+   */
   static <T> T provide(Class<T> type, HttpClientContext clientContext) {
     return INSTANCE.provideFor(type, clientContext);
   }
+
+  /**
+   * Return the HttpApiProvider for the client interface type or null if not registered.
+   */
+  static <T> HttpApiProvider<T> get(Class<T> type) {
+    return INSTANCE.lookup(type);
+  }
 }

client/src/main/java/io/avaje/http/client/DHttpClientContext.java

@@ -40,6 +40,10 @@ public <T> T create(Class<T> clientInterface) {
     if (!clientInterface.isInterface()) {
       throw new IllegalArgumentException("API declarations must be interfaces.");
     }
+    HttpApiProvider<T> apiProvider = DHttpApi.get(clientInterface);
+    if (apiProvider != null) {
+      return apiProvider.provide(this);
+    }
     String implClassName = clientImplementationClassName(clientInterface);
     try {
       Class<?> serviceClass = Class.forName(implClassName);