如果发生超时异常，请重新订阅一个可观察对象

Question

i'm using retrofit to return an observable as a result of REST API call to server. Its very usual that a request timeout exception occurs and observable stops executing. How to resubscribe of retry if exception is of a specific type

myObservable
    .subscribe(new Subscriber<Something> sub(){
        @override
        void onNext(Something something){
            //do something with something
        }
                    @override
        void onError(Throwable e){
            //retry and resend call to server if e is request timeout exception
        }

Answer 1

You can use the retry operator.

Example:

myObservable
    .retry((retryCount, throwable) -> retryCount < 3 && throwable instanceof SocketTimeoutException)
    .subscribe(new Subscriber<Something> sub(){
        @override
        void onNext(Something something){
            //do something with something
        }
                    @override
        void onError(Throwable e){

        }

In the example it will resubscribe when there is a SocketTimeoutException max 3 times.

or without lambda:

myObservable
    .retry(new Func2<Integer, Throwable, Boolean>() {
                @Override
                public Boolean call(Integer retryCount, Throwable throwable) {
                    return retryCount < 3 && throwable instanceof SocketTimeoutException;
                }
            })
    .subscribe(new Subscriber<Something> sub(){
        @override
        void onNext(Something something){
            //do something with something
        }
                    @override
        void onError(Throwable e){

        }