CDI's dependency injection support

[salvadormarcos]

I tried using dependency injection (Java EE's CDI) with Sql2o and didn't work. It would be a very useful feature.

Just add a no-arg constructor in Sql2o and Connection classes. I did it and decided to share.

[eliandroribeiro]

Why not just use a *@Producer* method? Em 28 de jan de 2017 5:29 PM, "Marcos Koch Salvador" < [email protected]> escreveu:

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I tried using Dependency Injection (Java EE's CDI) with Sql2o and didn't work. It would be a very useful feature. Just add a no-arg constructor in Sql2o and Connection classes. I did it and decided to share. ------------------------------ You can view, comment on, or merge this pull request online at: #267 Commit Summary - Added CDI's dependency injection support File Changes - *M* core/src/main/java/org/sql2o/Connection.java <https://github.com/aaberg/sql2o/pull/267/files#diff-0> (7) - *M* core/src/main/java/org/sql2o/Sql2o.java <https://github.com/aaberg/sql2o/pull/267/files#diff-1> (8) Patch Links: - https://github.com/aaberg/sql2o/pull/267.patch - https://github.com/aaberg/sql2o/pull/267.diff — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#267>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AFERfDvdT14E3BIJ72YAmXLJhL0L0_Jpks5rW5b8gaJpZM4Lwl9B> .

[salvadormarcos]

I created the producer methods as code below, but the CDI threw an exception requiring a no-arg constructor.

public class ConnectionProducer {
    @Produces
    @ApplicationScoped
    public Sql2o createSql2o() {
        return new Sql2o("jdbc:hsqldb:mem:aname", "SA", "");
    }
    
    @Produces
    @RequestScoped
    public Connection openConnection(Sql2o sql2o) throws SQLException {
        return sql2o.open();
    }
    
    public void closeConnection(@Disposes Connection conn) {
        conn.close();
    }
}

The only way to work without changing Sql2o would be to replace @ApplicationScoped and @RequestScoped by @singleton.
However, in a web application, share the same connection between multiple requests would be a problem.