改造2：捕获连接超时异常

Question

我有以下设置：

final OkHttpClient okHttpClient = new OkHttpClient();
okHttpClient.setReadTimeout(5, TimeUnit.SECONDS);
okHttpClient.setConnectTimeout(5, TimeUnit.SECONDS);

RestAdapter.Builder builder = new RestAdapter.Builder()
        .setEndpoint(ROOT)
        .setClient(new OkClient(okHttpClient))
        .setLogLevel(RestAdapter.LogLevel.FULL);

我正在尝试处理服务器关闭，用户出现连接超时异常的情况，这是我的日志记录：

java.net.SocketTimeoutException: failed to connect to /192.168.0.53 (port 3000) after 5000ms

完整日志记录：http://pastebin.com/gscCGb7x

有没有办法将其转化为改造失败的方法，这样我就可以在那里处理它？

提前感谢！

Answer 1

如果有人在静态编程语言/协程中遇到同样的问题，请在协程范围中添加错误处理程序：

CoroutineScope(Dispatchers.IO).launch(handler) {

而处理程序本身看起来像：

val handler = CoroutineExceptionHandler { _, exception ->
    Log.t("Network", "Caught $exception")
}

Answer 2

@Override
public void onFailure(Call call, Throwable t) {
    if(t instanceof SocketTimeoutException){
        message = "Socket Time out. Please try again.";
    }
}

Answer 3

用于改装2

在web服务实例中定义侦听器：

public interface OnConnectionTimeoutListener {
    void onConnectionTimeout();
}

向Web服务添加拦截器：

public WebServiceClient() {
    OkHttpClient client = new OkHttpClient();
    client.setConnectTimeout(10, TimeUnit.SECONDS);
    client.setReadTimeout(30, TimeUnit.SECONDS);
    client.interceptors().add(new Interceptor() {
        @Override
        public Response intercept(Chain chain) throws IOException {
            return onOnIntercept(chain);
        }
    });
    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(BASE_URL)
            .addConverterFactory(GsonConverterFactory.create())
            .client(client)
            .build();
    webService = retrofit.create(WebService.class);
}

用try-catch块括住intercep代码，并在异常发生时通知侦听器：

private Response onOnIntercept(Chain chain) throws IOException {
    try {
        Response response = chain.proceed(chain.request());
        String content = UtilityMethods.convertResponseToString(response);
        Log.d(TAG, lastCalledMethodName + " - " + content);
        return response.newBuilder().body(ResponseBody.create(response.body().contentType(), content)).build();
    }
    catch (SocketTimeoutException exception) {
        exception.printStackTrace();
        if(listener != null)
            listener.onConnectionTimeout();
    }

    return chain.proceed(chain.request());
}