我正在尝试创建一个简单的包装器，它将调用服务器下载信息并解析发送的二进制数据。
对于连接，我使用名为okhttp的库，由于3G上的连接不是非常可靠，因此我决定使用以下函数实现非常简单的重试功能**(请注意，此方法始终将从后台线程调用)**
private InputStream callServer() throws ServerException, NoNetworkAvailableException, ConnectionErrorException {
NetworkOperation networkOperation = getNetworkOperation();
InputStream inputStream = null;
//in case of network problems we will retry 3 times separated by 5 seconds before gave up
while (connectionFailedRetryCounter < connectionFailedMaximumAllowedRetries()) {
connectionFailedRetryCounter++;
try {
inputStream = networkOperation.execute();
break;//if this line was reached it means a successfull operation, no need to retry .
} catch (ConnectionErrorException e) {
if (canRetryToConnect()) {
Utils.forceSleepThread(Constants.Communications.ConnectionFailedTrialCounter.SLEEP_BETWEEN_REQUESTS_MILLI);//retry after 5 secs (Thread.sleep)
} else {
throw e;//I give up
}
}
}
return inputStream;
}
private boolean canRetryToConnect() {
return (connectionFailedRetryCounter < connectionFailedMaximumAllowedRetries()) && !canceled;
}
这是否是正确的做法？或者库本身已经实现了此功能（不需要再实现此类内容）？
以下是execute()方法所执行的操作：
public InputStream execute() throws ConnectionErrorException, NoNetworkAvailableException, ServerException {
if (!Utils.isNetworkAvailable(context)) {
throw new NoNetworkAvailableException();
}
Response response = doExecute();
if (!response.isSuccessful()) {
throw new ServerException(response.code());
}
return response.body().byteStream();
}
private Response doExecute() throws ConnectionErrorException {
Response response;
try {
if (getRequestType() == RequestType.GET) {
response = executeGet();
} else {
response = executePost();
}
} catch (IOException e) {
throw new ConnectionErrorException();
}
return response;
}