public static HttpFunctionExecutor forClass()

in invoker/core/src/main/java/com/google/cloud/functions/invoker/HttpFunctionExecutor.java [44:64]

21 lines of code
3 McCabe index (conditional complexity)


  public static HttpFunctionExecutor forClass(Class<?> functionClass) {
    if (!HttpFunction.class.isAssignableFrom(functionClass)) {
      throw new RuntimeException(
          "Class "
              + functionClass.getName()
              + " does not implement "
              + HttpFunction.class.getName());
    }
    Class<? extends HttpFunction> httpFunctionClass = functionClass.asSubclass(HttpFunction.class);
    ClassLoader oldContextLoader = Thread.currentThread().getContextClassLoader();
    try {
      Thread.currentThread().setContextClassLoader(httpFunctionClass.getClassLoader());
      HttpFunction httpFunction = httpFunctionClass.getConstructor().newInstance();
      return new HttpFunctionExecutor(httpFunction);
    } catch (ReflectiveOperationException e) {
      throw new RuntimeException(
          "Could not construct an instance of " + functionClass.getName() + ": " + e, e);
    } finally {
      Thread.currentThread().setContextClassLoader(oldContextLoader);
    }
  }