Examples with AbsCallbackWrapper com.lzy.okgo.callback.AbsCallbackWrapper used on opensource projects

Example 1 with AbsCallbackWrapper

use of com.lzy.okgo.callback.AbsCallbackWrapper in project okhttp-OkGo by jeasonlzy.

the class CacheCall method execute.

@Override
public void execute(AbsCallback<T> callback) {
    synchronized (this) {
        if (executed)
            throw new IllegalStateException("Already executed.");
        executed = true;
    }
    mCallback = callback;
    if (mCallback == null)
        mCallback = new AbsCallbackWrapper<>();
    //请求执行前UI线程调用
    mCallback.onBefore(baseRequest);
    //请求之前获取缓存信息，添加缓存头和其他的公共头
    if (baseRequest.getCacheKey() == null)
        baseRequest.setCacheKey(HttpUtils.createUrlFromParams(baseRequest.getBaseUrl(), baseRequest.getParams().urlParamsMap));
    if (baseRequest.getCacheMode() == null)
        baseRequest.setCacheMode(CacheMode.NO_CACHE);
    //无缓存模式,不需要进入缓存逻辑
    final CacheMode cacheMode = baseRequest.getCacheMode();
    if (cacheMode != CacheMode.NO_CACHE) {
        //noinspection unchecked
        cacheEntity = (CacheEntity<T>) CacheManager.INSTANCE.get(baseRequest.getCacheKey());
        //检查缓存的有效时间,判断缓存是否已经过期
        if (cacheEntity != null && cacheEntity.checkExpire(cacheMode, baseRequest.getCacheTime(), System.currentTimeMillis())) {
            cacheEntity.setExpire(true);
        }
        HeaderParser.addCacheHeaders(baseRequest, cacheEntity, cacheMode);
    }
    //构建请求
    RequestBody requestBody = baseRequest.generateRequestBody();
    final Request request = baseRequest.generateRequest(baseRequest.wrapRequestBody(requestBody));
    rawCall = baseRequest.generateCall(request);
    if (cacheMode == CacheMode.IF_NONE_CACHE_REQUEST) {
        //如果没有缓存，或者缓存过期,就请求网络，否者直接使用缓存
        if (cacheEntity != null && !cacheEntity.isExpire()) {
            T data = cacheEntity.getData();
            HttpHeaders headers = cacheEntity.getResponseHeaders();
            if (data == null || headers == null) {
                //由于没有序列化等原因,可能导致数据为空
                sendFailResultCallback(true, rawCall, null, OkGoException.INSTANCE("没有获取到缓存,或者缓存已经过期!"));
            } else {
                sendSuccessResultCallback(true, data, rawCall, null);
                //获取缓存成功,不请求网络
                return;
            }
        } else {
            sendFailResultCallback(true, rawCall, null, OkGoException.INSTANCE("没有获取到缓存,或者缓存已经过期!"));
        }
    } else if (cacheMode == CacheMode.FIRST_CACHE_THEN_REQUEST) {
        //先使用缓存，不管是否存在，仍然请求网络
        if (cacheEntity != null && !cacheEntity.isExpire()) {
            T data = cacheEntity.getData();
            HttpHeaders headers = cacheEntity.getResponseHeaders();
            if (data == null || headers == null) {
                //由于没有序列化等原因,可能导致数据为空
                sendFailResultCallback(true, rawCall, null, OkGoException.INSTANCE("没有获取到缓存,或者缓存已经过期!"));
            } else {
                sendSuccessResultCallback(true, data, rawCall, null);
            }
        } else {
            sendFailResultCallback(true, rawCall, null, OkGoException.INSTANCE("没有获取到缓存,或者缓存已经过期!"));
        }
    }
    if (canceled) {
        rawCall.cancel();
    }
    currentRetryCount = 0;
    rawCall.enqueue(new okhttp3.Callback() {

        @Override
        public void onFailure(okhttp3.Call call, IOException e) {
            if (e instanceof SocketTimeoutException && currentRetryCount < baseRequest.getRetryCount()) {
                //超时重试处理
                currentRetryCount++;
                okhttp3.Call newCall = baseRequest.generateCall(call.request());
                newCall.enqueue(this);
            } else {
                mCallback.parseError(call, e);
                //请求失败，一般为url地址错误，网络错误等,并且过滤用户主动取消的网络请求
                if (!call.isCanceled()) {
                    sendFailResultCallback(false, call, null, e);
                }
            }
        }

        @Override
        public void onResponse(okhttp3.Call call, okhttp3.Response response) throws IOException {
            int responseCode = response.code();
            //304缓存数据
            if (responseCode == 304 && cacheMode == CacheMode.DEFAULT) {
                if (cacheEntity == null) {
                    sendFailResultCallback(true, call, response, OkGoException.INSTANCE("服务器响应码304，但是客户端没有缓存！"));
                } else {
                    T data = cacheEntity.getData();
                    HttpHeaders headers = cacheEntity.getResponseHeaders();
                    if (data == null || headers == null) {
                        //由于没有序列化等原因,可能导致数据为空
                        sendFailResultCallback(true, call, response, OkGoException.INSTANCE("没有获取到缓存,或者缓存已经过期!"));
                    } else {
                        sendSuccessResultCallback(true, data, call, response);
                    }
                }
                return;
            }
            //响应失败，一般为服务器内部错误，或者找不到页面等
            if (responseCode == 404 || responseCode >= 500) {
                sendFailResultCallback(false, call, response, OkGoException.INSTANCE("服务器数据异常!"));
                return;
            }
            try {
                Response<T> parseResponse = parseResponse(response);
                T data = parseResponse.body();
                //网络请求成功，保存缓存数据
                handleCache(response.headers(), data);
                //网络请求成功回调
                sendSuccessResultCallback(false, data, call, response);
            } catch (Exception e) {
                //一般为服务器响应成功，但是数据解析错误
                sendFailResultCallback(false, call, response, e);
            }
        }
    });
}