Hi,
How about creating a "preloader" injector - only containing the
configuration - and calling injectMembers() on the actual module classes ?
Injector modulesInjector = Guice.createInjector(Stage.PRODUCTION,
new AbstractModule() {
@Override
protected void configure() {
Names.bindProperties(binder(), p); // p holds all the
properties
}
});
for (AbstractModule module : all) {
modulesInjector.injectMembers(module);
}
Injector injector = Guice.createInjector(Stage.PRODUCTION, all);
Is this considered an anti-pattern ?
--
L
--
L
On Tue, Jun 25, 2013 at 9:04 AM, Stephan Classen <[email protected]> wrote:
> Hi
>
> You are right, neither guice-persist nor guice-jpa provide the option to
> inject the persistence unit name.
> This is because it is kind of a chicken egg problem.
>
> In order to inject the persistence unit name you need an injector, then on
> the other hand you can't have the injector before configuring the modules...
> I guess you could build a persistence extension which instead of taking
> the name in the constructor just requires a binding with a given name to be
> defined (I may consider this for a next release of gucie-jpa).
>
> But for now it is not easily doable. What I usually do is collect all the
> information needed to configure the injector in a single property file. And
> then do it the "old Java" way, load that one file using
> java.util.Properties and java.lang.ClassLoader.getResourceAsStream(String).
> I like this because the settings for configuring guice are separated from
> the rest and are all in a single place. In most projects I have not more
> than 3 settings in this properties file.
>
> Hope this helps
>
>
>
> On 06/24/2013 10:14 PM, Daniel Bimschas wrote:
>
> Hi,
>
> I've just discovered this thread and I find myself in a somewhat similar
> situation as described by Martin, working with guice-persist. In my case I
> have a POJO holding the applications configuration which gets injected
> itself from bound constants loaded from a properties file. So (from my
> understanding) at the time of installing the guice-persist module, the POJO
> instance can't be created/injected yet as we're still in the phase of
> configuring the bindings, so I can't access the POJOs fields to load the
> properties for the guice-persist module.
>
> I've also discovered https://github.com/sclassen/guice-jpa which looks
> like its able to solve one of my other issues but I couldn't figure out how
> to solve this runtime configuration issue with it either.
>
> Any ideas?
>
> Cheers,
> Daniel
>
>
> On Wednesday, 26 September 2012 10:11:08 UTC+2, Martin Schayna wrote:
>>
>> Hi,
>>
>> I have small API server application based on Jersey, Hibernate/JPA and
>> Guice, running in Tomcat. I want to use guice-persist extension for better
>> handling EntityManager instances and transactions. Now I'm doing the whole
>> work in each controller method, so each method creates EntityManager,
>> starts transaction, close everything etc. The guice-persist thing looks
>> pretty straightforward, but I don't know how to handle this:
>>
>> I have only one persistence-unit, but application caches more
>> EntityManagerFactory instances, each with its own properties. These
>> properties are loaded from configuration on runtime. I cannot configure
>> GuiceServletContextListener with module
>> JpaPersistModule("unit").**properties(myProperties)
>> because myProperties are based on request parameters -- my application
>> supports multi-tenancy and tenants has data in several similar databases.
>>
>> How can I use guice-persist with this scenario?
>>
>> Thanks,
>> Martin Schayna
>>
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