jax rs - StreamingOutput in jax-rs usecases? -

-

jax-rs provides streamingoutput interface can implement raw streaming of our response bodies.

public interface streamingoutput {     void write(outputstream output) }

i not sure why go building interface expose response outputstream. why not inject outputstream directly , can write on it!!

in book restful java jax-rs 2.0 written bill burk (one of resteasy authors), find explanation streamingoutput.

the same question asked answered author:

streamingoutput simple callback interface implement when want raw streaming of response bodies [...]

you allocate implemented instances of interface , return them jax-rs resource methods. when jax-rs runtime ready write response body of message, write() method invoked on streamingoutput instance. [...]

you may asking yourself, “why not inject outputstream directly? why have callback object streaming output?” that’s question! reason having callback object gives jax-rs implementation freedom handle output wants. performance reasons, may beneficial jax-rs implementation use different thread other calling thread output responses. more importantly, many jax-rs implementations have interceptor model abstracts things out automatic gzip encoding or response caching. streaming directly can bypass these architectural constructs. finally, servlet 3.0 specification has introduced idea of asynchronous responses. callback model fits in nicely idea of asynchronous http within servlet 3.0 specification.

and streamingoutput documentation states following:

this lightweight alternative messagebodywriter.


Comments

Post a Comment

Popular posts from this blog

magento2 - Magento 2 admin grid add filter to collection -

-
i created grid in admin xml ui components. need filter collection via url parameter , dont know how achieve that. tried inject requestinterface collection, filter didnt work. di.xml <virtualtype name="slidelistingdataprovider" type="magento\framework\view\element\uicomponent\dataprovider\dataprovider"> <arguments> <argument name="collection" xsi:type="object" shared="false">xxx\xxx\model\resourcemodel\grid\slide\collection</argument> <argument name="filterpool" xsi:type="object" shared="false">slidelistingfilterpool</argument> <!-- define new object filters --> </arguments> </virtualtype> <virtualtype name="slidelistingfilterpool" type="magento\framework\view\element\uicomponent\dataprovider\filterpool"> <arguments> <argument name="applier...
Read more

Android volley - avoid multiple requests of the same kind to the server? -

-
i using volley upload list of images server. happens within service. once image uploaded remove list. problem arises when internet connection breaks. when internet connection breaks , comes again thinking of adding images yet uploaded request queue. this can result in more 1 copy of same image saved on server request same image might have gone through before getting rseponse. how can address scenario? i'm not quite sure why you're using service schedule requests volley automatically runs it's request in seperate thread. nevertheless can listen both request results, successful , unsuccessful adding listeners. you can remove image list schedule request using volley. if succeeds can carry on desired, if fails can add again list. public static request getimageuploadrequest(final string image) { response.listener<t> responselistener = new response.listener<t>() { @override public void onresponse(t response...
Read more

Combining PHP Registration and Login into one class with multiple functions in one PHP file -

-
i'm trying combine registration, activation , login scripts php website backend script front end developer can pass variables different forms to. my question whether appropriate approach this. don't want have lot of php files different pieces of application developing. far have written following 2 functions login, register , activate user front end developer can call: <?php /** * created phpstorm. * user: karl * date: 26/07/2016 * time: 02:25 */ class users { function register_user($email, $password, $user_name) { $server_name = "localhost"; $u_name = "root"; $db_password = "root"; $db_name = "betamath_graspe"; //email notification variable $from_address="info@slack.com"; //registration form $msg_reg_user='username taken. please choose different username'; $msg_reg_email='email registered'; $msg_reg_active=...
Read more