java - Akka message is null -


i playing akka framework java, version 2.3.9 going fine, have issue callback. when run callback getsender().tell(null, self());

i in logs 

[akka://system/user/towerofdeath:current:266:ceil:34] message null     akka.actor.invalidmessageexception: message null     @ akka.pattern.promiseactorref.$bang(asksupport.scala:266)     @ akka.actor.actorref.tell(actorref.scala:123)

it's fine, can't send null, made small generic message , problem solved. if error happens, actor dies. believe possible produce bag, send object, null.

hot restore actor in case?

thanks help.

use supervision, allows parent actor decide how deal failures (bugs) that:

here's example: http://doc.akka.io/docs/akka/2.3.14/java/fault-tolerance.html#creating_a_supervisor_strategy

for more information:

http://doc.akka.io/docs/akka/2.3.14/general/supervision.html http://doc.akka.io/docs/akka/2.3.14/java/fault-tolerance.html


Comments

Post a Comment

Popular posts from this blog

java - WARN : org.springframework.web.servlet.PageNotFound - No mapping found for HTTP request with URI [/board/] in DispatcherServlet with name 'appServlet' -

this question has answer here: why spring mvc respond 404 , report “no mapping found http request uri […] in dispatcherservlet”? 3 answers i trying making simple bbs i'm encountering following error, warn : org.springframework.web.servlet.pagenotfound - no mapping found http request uri [/board/] in dispatcherservlet name 'appservlet' i have tried solve error many times, have failed. how can solve error? here web.xml, controllerand , servlet-context. my web.xml <?xml version="1.0" encoding="utf-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <filter> <filter-nam...
Read more

html - Outlook 2010 Anchor (url/address/link) -

i'm trying link specific pdf page msoutlook'10 or msword'10, #page=... anchor particularly useful , works fine elsewhere. unfortunately when click [ctr-k] in outlook or winword, links re-formatted assuming unc path. pdf file located on shared drive. using "file:" prefix links open pdf in adobe reader (outside of browser), , "http:" open inside browser. issue seem need open in browser "file:" prefix in order anchor work. know anchors work inside browser. outlook uses windows/explorer default program (based on file extension) seems open in adobe reader neglecting anchor. is aware of solution, link specific page or bookmark of shared-pdf ms outlook and/or winword link? common references: mailermailer.com/...anchor-tags-html-emails campaignmonitor.com/...anchor-links-in-email-newsletters/ stackoverflow.com/...anchor-in-pdf-document
Read more

android - How to create dynamically Fragment pager adapter -

i unable create dynamic layout each tabs, able create tabs dynamically constructor(public mypageradapter(fragmentmanager fm , int nooftabs)), coudn't inflate view each tabs creating each fragment should dyanmic. public class mypageradapter extends fragmentpageradapter { private final string[] titles = { "categories", "home", "top paid", "top free", "top grossing", "top new paid", "top new free", "trending" }; int nooftabs; **public mypageradapter(fragmentmanager fm , int nooftabs) { super(fm); this.nooftabs = nooftabs; }** /*public mypageradapter(fragmentmanager fm) { super(fm); }*/ @override public charsequence getpagetitle(int position) { return titles[position]; } @override public int getcount() { ...
Read more