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/*
For step-by-step instructions on connecting your Android application to this backend module,
see "App Engine Backend with Google Cloud Messaging" template documentation at
https://github.com/GoogleCloudPlatform/gradle-appengine-templates/tree/master/GcmEndpoints
*/
package ${packageName};
import com.google.api.server.spi.config.Api;
import com.google.api.server.spi.config.ApiMethod;
import com.google.api.server.spi.config.ApiNamespace;
import com.google.api.server.spi.response.CollectionResponse;
import java.util.List;
import java.util.logging.Logger;
import javax.inject.Named;
import static ${packageName}.OfyService.ofy;
/**
* A registration endpoint class we are exposing for a device's GCM registration id on the backend
*
* For more information, see
* https://developers.google.com/appengine/docs/java/endpoints/
*
* NOTE: This endpoint does not use any form of authorization or
* authentication! If this app is deployed, anyone can access this endpoint! If
* you'd like to add authentication, take a look at the documentation.
*/
@Api(
name = "registration",
version = "v1",
namespace = @ApiNamespace(
ownerDomain = "${endpointOwnerDomain}",
ownerName = "${endpointOwnerDomain}",
packagePath="${endpointPackagePath}"
)
)
public class RegistrationEndpoint {
private static final Logger log = Logger.getLogger(RegistrationEndpoint.class.getName());
/**
* Register a device to the backend
*
* @param regId The Google Cloud Messaging registration Id to add
*/
@ApiMethod(name = "register")
public void registerDevice(@Named("regId") String regId) {
if(findRecord(regId) != null) {
log.info("Device " + regId + " already registered, skipping register");
return;
}
RegistrationRecord record = new RegistrationRecord();
record.setRegId(regId);
ofy().save().entity(record).now();
}
/**
* Unregister a device from the backend
*
* @param regId The Google Cloud Messaging registration Id to remove
*/
@ApiMethod(name = "unregister")
public void unregisterDevice(@Named("regId") String regId) {
RegistrationRecord record = findRecord(regId);
if(record == null) {
log.info("Device " + regId + " not registered, skipping unregister");
return;
}
ofy().delete().entity(record).now();
}
/**
* Return a collection of registered devices
*
* @param count The number of devices to list
* @return a list of Google Cloud Messaging registration Ids
*/
@ApiMethod(name = "listDevices")
public CollectionResponse<RegistrationRecord> listDevices(@Named("count") int count) {
List<RegistrationRecord> records = ofy().load().type(RegistrationRecord.class).limit(count).list();
return CollectionResponse.<RegistrationRecord>builder().setItems(records).build();
}
private RegistrationRecord findRecord(String regId) {
return ofy().load().type(RegistrationRecord.class).filter("regId", regId).first().now();
}
}
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