java Retrofit 2/OkHttp：取消所有正在运行的请求
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Retrofit 2/OkHttp: Cancel all running requests
提问by Shubhadeep Chaudhuri
I'm using Retrofit 2-beta2 with OkHttp 2.7.0.
我正在使用带有 OkHttp 2.7.0 的 Retrofit 2-beta2。
To get the OkHttpClientobject from Retrofit I'm using the Retrofit .client()method and to cancel all it's running requests, I'm calling it's cancel(Object tag)method but the requests still keep running and I get a response.
为了OkHttpClient从 Retrofit 中获取对象，我使用了Retrofit .client()方法并取消了它正在运行的所有请求，我调用了它的cancel(Object tag)方法，但请求仍然继续运行并且我得到了响应。
Even the client's Dispatcher's getQueuedCallCount()and getRunningCallCount()return 0 after calling cancel().
即使客户Dispatcher的getQueuedCallCount（）和getRunningCallCount（）返回0调用cancel（）之后。
Is there anything else that I need to do for this to work? Or could it be a bug in OkHttp?
我还需要做些什么才能让它发挥作用？或者它可能是 OkHttp 中的错误？
As a workaround, I'm calling shutdownNow()on the client's ExecutorServicebut I'd prefer a cleaner solution.
作为一种解决方法，我正在拜访shutdownNow()客户，ExecutorService但我更喜欢更简洁的解决方案。
回答by Shubhadeep Chaudhuri
UPDATE:This is now much easier to achieve in OkHttp 3 by using Dispatcherwhich has a cancelAll()method. The dispatcher is returned from OkHttpClient.dispatcher().
更新：现在通过使用Dispatcherwhich 有一个cancelAll()方法，这在 OkHttp 3 中更容易实现。调度程序从 返回OkHttpClient.dispatcher()。
Old Solution:The only way to do this (that I could find) is to create a subclass of OkHttpClientand use that with Retrofit.
旧解决方案：执行此操作的唯一方法（我能找到）是创建一个子类OkHttpClient并将其与 Retrofit 一起使用。
class OkHttpClientExt extends OkHttpClient {
static final Object TAG_CALL = new Object();
@Override
public Call newCall(Request request) {
Request.Builder requestBuilder = request.newBuilder();
requestBuilder.tag(TAG_CALL);
return super.newCall(requestBuilder.build());
}
}
The following line cancels all requests with tag TAG_CALL. Since the class above sets TAG_CALLon all requests, so all requests are cancelled.
以下行取消所有带有标记的请求TAG_CALL。由于上面的类设置TAG_CALL了所有请求，因此所有请求都被取消。
retrofit.client().cancel(OkHttpClientExt.TAG_CALL);
