scope - How to get ApplicationScoped producer in Java SE via weld? -


i'm trying implement dependency injection in java se program using weld , have problems using application scoped producer. poc of problem minimal code. mybean class:

public class mybean implements serializable{   private int value;    public mybean(int value) {     this.value = value;   }    public int getvalue() {     return value;   }    public void setvalue(int value) {     this.value = value;   } }

the injection point:

@path("api") public class myresource implements serializable {   @inject   private mybean bean;    @get   @path("bean")   @produces(mediatype.application_json)   public response getbean() {     return response.ok(bean).build();   } }

the producer want it's produced instance @applicationscoped is:

public class beanproducer {    @produces   @applicationscoped   public mybean beanproducer(){     system.out.println("producing");     return new mybean(42);   } }

and bound in main class:

public class main {   public void main(@observes containerinitialized event) {     try {       uri baseuri = uribuilder.fromuri("http://localhost").port(1234).build();       resourceconfig config = new resourceconfig(myresource.class)           .register(jacksonfeature.class);       simpleserver server = simplecontainerfactory.create(baseuri, config);       system.in.read();       server.close();     } catch (ioexception e) {       e.printstacktrace();     }   } }

when try run this, following exception:

exception in thread "main" org.jboss.weld.exceptions.deploymentexception: weld-001410: injection point [backedannotatedfield] @inject @applicationscoped private myresource.bean has non-proxyable dependencies @ org.jboss.weld.bootstrap.validator.validateinjectionpointfordeploymentproblems(validator.java:392) @ org.jboss.weld.bootstrap.validator.validateinjectionpoint(validator.java:293) @ org.jboss.weld.bootstrap.validator.validategeneralbean(validator.java:134) @ org.jboss.weld.bootstrap.validator.validateribean(validator.java:167) @ org.jboss.weld.bootstrap.validator.validatebean(validator.java:530) @ org.jboss.weld.bootstrap.concurrentvalidator$1.dowork(concurrentvalidator.java:68) @ org.jboss.weld.bootstrap.concurrentvalidator$1.dowork(concurrentvalidator.java:66) @ org.jboss.weld.executor.iterativeworkertaskfactory$1.call(iterativeworkertaskfactory.java:60) @ org.jboss.weld.executor.iterativeworkertaskfactory$1.call(iterativeworkertaskfactory.java:53) @ java.util.concurrent.futuretask.run(futuretask.java:266) @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1142) @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:617) @ java.lang.thread.run(thread.java:745) caused by: org.jboss.weld.exceptions.unproxyableresolutionexception: weld-001435: normal scoped bean class mybean not proxyable because has no no-args constructor - producer method [mybean] qualifiers [@any @default] declared [[backedannotatedmethod] @produces @applicationscoped public beanproducer.beanproducer()]. @ org.jboss.weld.util.proxies.getunproxyableclassexception(proxies.java:214) @ org.jboss.weld.util.proxies.getunproxyabletypeexception(proxies.java:178) @ org.jboss.weld.bootstrap.validator.validateinjectionpointfordeploymentproblems(validator.java:390) ... 12 more

if define scope producer, won't work. if set injection point scope @applicationscoped , producer without scope, works want, means have single instance of bean in entire lifecycle of app.

but setting scope of injection point @applicationscoped same default scope, ie. new instance each request.

what reason behind of this?

this happens because @applicationscoped normal scope, needs proxyable. proxyable, need no-args constructor.

to clarify 1 of points

it works want, means have single instance of bean in entire lifecycle of app.

this isn't accurate. injection points don't define scope, producer does. there's no type-safe way in java, since can have producer field.


Comments

Post a Comment

Popular posts from this blog

java - pagination of xlsx file to XSSFworkbook using apache POI -

right in code, reading xlsx file, xssfworkbook, , writing database. but, when size of xlsx file increases, causes outofmemory error. can not increase server size, or divide xlsx file pieces. tried loading workbook using file (instead of inputstream), didn't either. i looking way read 10k rows @ time (instead of entire file @ once) , iteratively write workbook , database. is there way apache poi? poi contains called "eventmodel" designed purpose. it's mentioned in faq : the ss eventmodel package api reading excel files without loading whole spreadsheet memory. require more knowledge on part of user, reduces memory consumption more tenfold. based on awt event model in combination sax. if need read-only access, best way it. however, may want double check first if issue somewhere else. check out this item : i think poi using memory! can do? 1 comes quite lot, reason isn't might think. so, first thing check - what's source of prob...
Read more

Unlimited choices in BASH case statement -

consider simple bash snippet: case $option in 1) image=${options[0]%.tar} ;; 2) image=${options[1]%.tar} ;; 3) image=${options[2]%.tar} ;; 4) image=${options[3]%.tar} ;; *) echo "invalid option" exit 1 esac in real script numbers goes 30. makes pretty long. can somehow specify cases variable? something this: case $option in $i) image=${options[$(($i-1))]%.tar} any pointer appreciated. you can match against multiple patterns in single clause: case $option in 1|2|3: echo "$option one, 2 or three" ;; esac if still typing you, can use simple pattern matching: case $option in # following matches # - single-digit numbers 0-9 # - two-digit numbers starting either 1 or 2 # - number 30 [0-9]|[12][0-9]|30) image=${options[$(($option-1))]%.tar} ;; *) echo "invalid option" 1>&2 exit 1 esac
Read more

apache - How do I stop my index.php being run twice for every user -

we've got webapp initial html served using apache , php. i noticed index.php being run twice every request. seems caused / effected rewrite rules in our .htaccess - rewritecond %{http_host} ^(www\.|hotels\.)ourdomain\.com$ [nc,or] rewritecond %{server_name} ^(www\.|hotels\.)ourdomain\.com$ [nc] rewriterule (.*) http://ourdomain.com/$1 [r=301] rewriterule ^hotels/([^/]+)/?\??(.*)$ ?d=$1&$2 [qsa] the final rule moving parameter url path query string. i.e. http://ourdomain.com/hotels/vegas?someparam=1 becomes http://ourdomain.com?d=vegas&someparam=1 if go directly query string version index.php run once. if use url redirected, index.php run twice (i'm checking adding error_log('end of index.php') file). so example going http://ourdomain.com/hotels/paris hits file twice http://ourdomain.com?d=paris hits once. i've seen this question , had @ blog mentioned , , can't find empty string url's (i've tried using yslow process). ...
Read more