Instances you construct can be injected into other classes, but those instances will not have their own @Inject points injected. You can use the ServiceLocator's inject(...) method to inject into such instances manually, but I'm not aware of a way to do so when using the DependencyBinder approach.
I would love to be wrong, though, as this is something I have wanted before.
--Tom Boettcher
On 09/09/2015 03:25 PM, Paul O'Fallon wrote:
Hello! Not sure if this is what you're asking about, but I have an example of binding an instance of a class. This instance is then injected via a @Context annotation.
Instance binding happens here:
https://github.com/pofallon/jersey2-akka-java/blob/master/src/main/java/com/ofallonfamily/jersey2akka/ExampleApplication.java<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_pofallon_jersey2-2Dakka-2Djava_blob_master_src_main_java_com_ofallonfamily_jersey2akka_ExampleApplication.java&d=BQMFaQ&c=NRtzTzKNaCCmhN_9N2YJR-XrNU1huIgYP99yDsEzaJo&r=9A14nJoP0MJM1-5Sr_v-32319N_9OuTZ9NAMrtQwyw0&m=Z3-CpGh4Nf_KDcTp2a9UeczUL1r_EzZIXzjaURTLl0M&s=Fz1p0smFeSa2JNd7kFkhhMuhuJp6LpRcLCpw3dEWz8k&e=>
Injected into resource here:
https://github.com/pofallon/jersey2-akka-java/blob/master/src/main/java/com/ofallonfamily/jersey2akka/ExampleService.java<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_pofallon_jersey2-2Dakka-2Djava_blob_master_src_main_java_com_ofallonfamily_jersey2akka_ExampleService.java&d=BQMFaQ&c=NRtzTzKNaCCmhN_9N2YJR-XrNU1huIgYP99yDsEzaJo&r=9A14nJoP0MJM1-5Sr_v-32319N_9OuTZ9NAMrtQwyw0&m=Z3-CpGh4Nf_KDcTp2a9UeczUL1r_EzZIXzjaURTLl0M&s=g5si6mp1mG9eRiII2wsiJoqERpbKVOjDpx7IfqjOndI&e=>
HTH,
Paul
On Wed, Sep 9, 2015 at 12:32 PM, Patrick Lawler <patrick.lawler_at_englishcentral.com<mailto:patrick.lawler_at_englishcentral.com>> wrote:
Awesome, made the change suggested by Tom and the layered injection appears to work now. Thanks!
On Wed, Sep 9, 2015 at 11:22 AM, Boettcher,Tom <<mailto:Tom.Boettcher_at_cerner.com>Tom.Boettcher_at_cerner.com<mailto:Tom.Boettcher_at_cerner.com>> wrote:
HK2 will not perform injection on beans that you have already constructed for yourself, it simply injects them as-is. If you want it to perform injection, you will need to bind the class, rather than an instance:
public class MyBinder extends AbstractBinder {
@Override
protected void configure() {
bind(MyDao.class).to(MyDao.class).in(Singleton.class);
bind(MyService.class).to(MyService.class).in(Singleton.class);
}
}
You can also use bindAsContract(...) to shorten the common case of binding a class to itself.
On 09/09/2015 09:55 AM, Patrick Lawler wrote:
Hello,
Is it possible to do spring-like injection in Jersey without using the jersey-spring integration?
Our project uses Jersey for RESTful web services. We want to move to a more layered architecture and use injection to inject singletons into other singletons that may be injected into yet other singletons. I have perused and experimented with @Inject and gone over what I hope was relevant parts of the Jersey and HK2 documentation and there did not seem to be an easy way to do this. We will be doing a lot of injecting of many different classes so did not want to create instances, nor do we want to create Providers for each class that we want to inject. I did do a test with the spring extension which works as expected though there are concerns about how heavy it may be. Is there a way to get the HK2 injection working in a similar manner?
We are using Jersey 2.19
simple example trying to use @Inject
@Path("/1/2/3")
public class MyRest {
@Inject
private MyService myService;
}
public class MyService {
@Inject
private MyDao myDao;
}
public class JerseyApplication extends ResourceConfig {
@Inject
public JerseyApplication(ServiceLocator serviceLocator) {
packages("com.my.app.api");
register(new MyBinder());
}
}
public class MyBinder extends AbstractBinder {
@Override
protected void configure() {
bind(new MyDao()).to(MyDao.class);
bind(new MyService()).to(MyService.class);
}
}
MyService gets successfully injected into the MyRest class, but the MyDao does not get injected into the MyService class. I started down the path of creating a provider, but that scenario just will not work for us given the number of classes we would need to do this for.
The spring integration I tested with is:
<dependency>
<groupId>org.glassfish.jersey.ext</groupId>
<artifactId>jersey-spring3</artifactId>
<version>2.19</version>
</dependency>
and this worked just fine using @Service, @Repository and @Autowired
Any suggestions or pointers to relevant documentation would be appreciated.
Thanks
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