Question

我一直在尝试使用此库：https://github.com/xkeshi/image-compressor

来自那里的例子：

new ImageCompressor(file, {
    quality: .6,
    success(result) {
      ...
    },
    error(e) {
      ...
    },
  });

我想将这个函数包装在一个名为compress的异步函数中，以便像使用它一样：

const compressed file = await compress(file)

Answer 1

private final class LoggingTaskDecorator implements TaskDecorator {

    @Override
    public Runnable decorate(Runnable task) {
        // web thread
        Map<String, String> webThreadContext = MDC.getCopyOfContextMap();
        return () -> {
            // work thread
            try {
                // TODO: is this thread safe?
                MDC.setContextMap(webThreadContext);
                task.run();
            } finally {
                MDC.clear();
            }
        };
    }

}

Answer 2

您可以像这样简单地包装函数：

  function compress(parameters) {
      return new Promise((resolve,reject) => {
        new ImageCompressor(file, {
          quality: .6,
          success(result) {
            resolve(result)
          },
          error(e) {
            reject(e)
          },
        });
     })

回调到异步等待

2 个答案: