Send cdi-dev mailing list submissions to cdi-dev(a)lists.jboss.org To subscribe or unsubscribe via the World Wide Web, visit https://lists.jboss.org/mailman/listinfo/cdi-dev or, via email, send a message with subject or body 'help' to cdi-dev-request(a)lists.jboss.org You can reach the person managing the list at cdi-dev-owner(a)lists.jboss.org When replying, please edit your Subject line so it is more specific than "Re: Contents of cdi-dev digest..." Today's Topics: 1. [JBoss JIRA] (CDI-45) Optional Injection Points (John Ament (JIRA)) 2. [JBoss JIRA] (CDI-45) Optional Injection Points (Martin Kouba (JIRA)) 3. [JBoss JIRA] (CDI-45) Optional Injection Points (John Ament (JIRA)) 4. [JBoss JIRA] (CDI-45) Optional Injection Points (Martin Kouba (JIRA)) 5. [JBoss JIRA] (CDI-489) NonexistentConversationException thrown at restore view or not? (Tomas Remes (JIRA)) 6. [JBoss JIRA] (CDI-45) Optional Injection Points (Matej Novotny (JIRA)) 7. Moving on SERVLET_SPEC-116 (giving servlet beans to servlet spec) (Antoine Sabot-Durand) ---------------------------------------------------------------------- Message: 1 Date: Tue, 11 Oct 2016 16:50:00 -0400 (EDT) From: "John Ament (JIRA)" <issues(a)jboss.org&gt; Subject: [cdi-dev] [JBoss JIRA] (CDI-45) Optional Injection Points To: cdi-dev(a)lists.jboss.org Message-ID: <JIRA.12428685.1295838622000.12490.1476219000927(a)Atlassian.JIRA&gt; Content-Type: text/plain; charset=UTF-8 [ https://issues.jboss.org/browse/CDI-45?page=com. atlassian.jira.plugin.system.issuetabpanels:comment- tabpanel&focusedCommentId=13305781#comment-13305781 ] John Ament commented on CDI-45: ------------------------------- I really like the idea of {{@Inject Optional<T>}}. I may try to prototype a CDI extension that does it. > Optional Injection Points > ------------------------- > > Key: CDI-45 > URL: https://issues.jboss.org/browse/CDI-45 > Project: CDI Specification Issues > Issue Type: Feature Request > Components: Resolution > Affects Versions: 1.0 > Reporter: Stuart Douglas > Priority: Optional > Fix For: TBD > > > There are occoasions where it may be useful for some injection points to be optional, e.g. > @Inject > @Optional > MyBean bean; > This would behave the same as a normal injection point, however it will not cause the deployment to fail if it is not satisified. -- This message was sent by Atlassian JIRA (v6.4.11#64026) ------------------------------ Message: 2 Date: Tue, 11 Oct 2016 17:21:00 -0400 (EDT) From: "Martin Kouba (JIRA)" <issues(a)jboss.org&gt; Subject: [cdi-dev] [JBoss JIRA] (CDI-45) Optional Injection Points To: cdi-dev(a)lists.jboss.org Message-ID: <JIRA.12428685.1295838622000.12514.1476220860783(a)Atlassian.JIRA&gt; Content-Type: text/plain; charset=UTF-8 [ https://issues.jboss.org/browse/CDI-45?page=com. atlassian.jira.plugin.system.issuetabpanels:comment- tabpanel&focusedCommentId=13305785#comment-13305785 ] Martin Kouba commented on CDI-45: --------------------------------- Note that {{Optional}} is not {{Serializable}} and is defined final. So there will be problems with injecting into beans with passivating scope (e.g. {{@SessionScoped}}). > Optional Injection Points > ------------------------- > > Key: CDI-45 > URL: https://issues.jboss.org/browse/CDI-45 > Project: CDI Specification Issues > Issue Type: Feature Request > Components: Resolution > Affects Versions: 1.0 > Reporter: Stuart Douglas > Priority: Optional > Fix For: TBD > > > There are occoasions where it may be useful for some injection points to be optional, e.g. > @Inject > @Optional > MyBean bean; > This would behave the same as a normal injection point, however it will not cause the deployment to fail if it is not satisified. -- This message was sent by Atlassian JIRA (v6.4.11#64026) ------------------------------ Message: 3 Date: Tue, 11 Oct 2016 18:38:00 -0400 (EDT) From: "John Ament (JIRA)" <issues(a)jboss.org&gt; Subject: [cdi-dev] [JBoss JIRA] (CDI-45) Optional Injection Points To: cdi-dev(a)lists.jboss.org Message-ID: <JIRA.12428685.1295838622000.12589.1476225480575(a)Atlassian.JIRA&gt; Content-Type: text/plain; charset=UTF-8 [ https://issues.jboss.org/browse/CDI-45?page=com. atlassian.jira.plugin.system.issuetabpanels:comment- tabpanel&focusedCommentId=13305798#comment-13305798 ] John Ament commented on CDI-45: ------------------------------- Underestood. The way I see it, for each Bean of type {{<T>}} there exists a Bean of type {{Optional<T>}} that shares the same qualifiers but has scope dependent. Optional beans can't be looked up programmatically. Another way to do this is to add all methods from https://docs.oracle.com/ javase/8/docs/api/java/util/Optional.html to Instance, which would be: * ifPresent * isPresent * orElse * orElseGet * orElseThrow So hm. > Optional Injection Points > ------------------------- > > Key: CDI-45 > URL: https://issues.jboss.org/browse/CDI-45 > Project: CDI Specification Issues > Issue Type: Feature Request > Components: Resolution > Affects Versions: 1.0 > Reporter: Stuart Douglas > Priority: Optional > Fix For: TBD > > > There are occoasions where it may be useful for some injection points to be optional, e.g. > @Inject > @Optional > MyBean bean; > This would behave the same as a normal injection point, however it will not cause the deployment to fail if it is not satisified. -- This message was sent by Atlassian JIRA (v6.4.11#64026) ------------------------------ Message: 4 Date: Wed, 12 Oct 2016 02:11:01 -0400 (EDT) From: "Martin Kouba (JIRA)" <issues(a)jboss.org&gt; Subject: [cdi-dev] [JBoss JIRA] (CDI-45) Optional Injection Points To: cdi-dev(a)lists.jboss.org Message-ID: <JIRA.12428685.1295838622000.12813.1476252661033(a)Atlassian.JIRA&gt; Content-Type: text/plain; charset=UTF-8 [ https://issues.jboss.org/browse/CDI-45?page=com. atlassian.jira.plugin.system.issuetabpanels:comment- tabpanel&focusedCommentId=13305826#comment-13305826 ] Martin Kouba commented on CDI-45: --------------------------------- -1 for adding those methods on {{Instance}} and -1 for introducing {{Optional}} built-in bean (mainly due to serialization issues and the need for special handling, e.g. disallow programatic lookup). {{Instance.getOptional().ifPresent(...)}} etc. is imho easier to understand. > Optional Injection Points > ------------------------- > > Key: CDI-45 > URL: https://issues.jboss.org/browse/CDI-45 > Project: CDI Specification Issues > Issue Type: Feature Request > Components: Resolution > Affects Versions: 1.0 > Reporter: Stuart Douglas > Priority: Optional > Fix For: TBD > > > There are occoasions where it may be useful for some injection points to be optional, e.g. > @Inject > @Optional > MyBean bean; > This would behave the same as a normal injection point, however it will not cause the deployment to fail if it is not satisified. -- This message was sent by Atlassian JIRA (v6.4.11#64026) _______________________________________________ cdi-dev mailing list cdi-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/cdi-dev Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (http://www.apache.org/ licenses/LICENSE-2.0.html). 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