java - Akka Remote and interception of unknown classes through custom deserialization -


problem/context. need send messages remote actor. these messages may contain objects of class unknown on recipient side. , need intercept such situation in order avoid classnotfoundexception.

one solution may consist in intercepting unknown classes @ time of message deserialization. then, message may replaced different application-level message remote actor can communicate sender doesn't have required classes.

i don't know if such interception possible, because custom de/serializators must implement akka.serialization.serializer has following method

def frombinary(bytes: array[byte],                clazz: option[class[_]]): anyref

now, problem stems construction of class objects (which done akka) objects of unknown class.

is there way customize akka deserialization @ lower-level point in order accomodate needs?

other solutions.

  • the problem similar 1 depicted in following question, different solution has been proposed: deserialize remote object narrowest accessible class still useful have answer there. however, solution wouldn't sufficient me, because while ok restrict interface, still need class implementation methods.

fact 1. discovered there alternative deserialization class type hint, namely deserialization string manifest. reference: http://doc.akka.io/docs/akka/2.4.0/scala/serialization.html#serializer_with_string_manifest

note: not available akka < 2.4.0. might matter akka 2.4.0 support java 1.6/1.7 dropped. means use akka 2.4 required have java 8.

fact 2. discovered akka not provide type hint. can disable type hint in following way

class myownserializer extends akka.serialization.serializer {    override def includemanifest: boolean = false // !!!

Comments

Post a Comment

Popular posts from this blog

javascript - jQuery: Add class depending on URL in the best way -

i have html progress meter: <div class="col-md-3" style="margin-left: -20px;"> <div class="progress-pos active" id="progess-1"> <div class="progress-pos-inner"> login </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-2"> <div class="progress-pos-inner"> scan items </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-3"> <div class="progress-pos-inner"> confirm address </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-4"> <div class="progress-pos-in
Read more

caching - How to check if a url path exists in the service worker cache -

i need check if particular url path exists in service worker cache. example, suppose url is: /myserviceworker/service?a=110&b=70 this url exists in cache, there many of them different values of , b. now, suppose want refresh of these urls, how can that? i want know how access key values service worker cache. if know key, plan follows: var url = new url(key); if(url.pathname === "\/myserviceworker/service") refetch key but not sure how cache key , in format is. mean, string or url? cache api has match() method returns promise resolving in response object if match or undefined if no match exists. second parameter object can specify ignoresearch not take account url parameters. the ignoresearch option supported firefox ( chrome status here ). in other hand, retrieve cache entries, can use keys() method.
Read more

Redirect to a HTTPS version using .htaccess -

i need modify .htaccess file redirect urls https version without "www". http://example.com --> https://example.com http://www.example.com --> https://example.com https://www.example.com --> https://example.com this how .htaccess file looks like: rewriteengine on rewritecond %{request_filename} !-d rewritecond %{request_filename} !-f rewriterule ^(.*)$ redirect.php?id=$1&page=$2 [qsa,l] what modifications need make .htaccess in order forward https without "www"? it depends on doing current code. looks file called redirect trying display php page seo friendly url. think might confusing people. anyway, need , force https without www, need 1 more rule above. also second rule needs two capture groups in rewriterule test string because wanting 2 different values using $1 , $2 references. rewriteengine on #rediect www non www and/or http https --- combinations. rewritecond %{http_host} !^example\.com [nc,or] rewritecond %{https} !^
Read more