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https://issues.apache.org/jira/browse/IGNITE-13005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17142037#comment-17142037
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Ilya Kasnacheev commented on IGNITE-13005:
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Please create a pull-request. [~mnusan]
> Spring Data 2 - "JPA style" and working with multiple Ignite instances on
> same JVM
> ----------------------------------------------------------------------------------
>
> Key: IGNITE-13005
> URL: https://issues.apache.org/jira/browse/IGNITE-13005
> Project: Ignite
> Issue Type: Improvement
> Components: spring
> Affects Versions: 2.7.6, 2.8.1
> Reporter: Manuel Núñez
> Priority: Major
> Labels: spring-data
>
> I have it working for Spring Data 2 (2.7.6, 2.8.1) module with some
> interesting improvements. Is there any ignite developer who can do the
> pull-request process?. Thanks community!!
> Code is 100% compatible with previous versions.
> [https://github.com/hawkore/ignite-hk/tree/master/modules/spring-data-2.0]
> * Supports multiple ignite instances on same JVM (@RepositoryConfig).
> * Supports query tuning parameters in {{@Query}} annotation
> * Supports projections
> * Supports {{Page}} and {{Stream}} responses
> * Supports Sql Fields Query resultset transformation into the domain entity
> * Supports named parameters ({{:myParam}}) into SQL queries, declared using
> {{@Param("myParam")}}
> * Supports advanced parameter binding and SpEL expressions into SQL queries:
> ** *Template variables*:
> *** {{#entityName}} - the simple class name of the domain entity
> ** *Method parameter expressions*: Parameters are exposed for indexed access
> ({{[0]}} is the first query method's param) or via the name declared using
> {{@Param}}. The actual SpEL expression binding is triggered by {{?#}}.
> Example: {{?#\{[0]\}} or {{?#\{#myParamName\}}}
> ** *Advanced SpEL expressions*: While advanced parameter binding is a very
> useful feature, the real power of SpEL stems from the fact, that the
> expressions can refer to framework abstractions or other application
> components through SpEL EvaluationContext extension model.
> * Supports SpEL expressions into Text queries ({{TextQuery}}).
> Some examples:
> {code:java}
> // Spring Data Repositories using different ignite instances on same JVM
> @RepositoryConfig(igniteInstance = "FLIGHTS_BBDD", cacheName = "ROUTES")
> public interface FlightRouteRepository extends IgniteRepository<Route,
> String> {
> ...
> }
> @RepositoryConfig(igniteInstance = "GEO_BBDD", cacheName = "POIS")
> public interface PoiRepository extends IgniteRepository<Poi, String> {
> ...
> }
> {code}
> {code:java}
> // named parameter
> @Query(value = "SELECT * from #{#entityName} where email = :email")
> User searchUserByEmail(@Param("email") String email);
> {code}
> {code:java}
> // indexed parameters
> @Query(value = "SELECT * from #{#entityName} where country = ?#{[0] and city
> = ?#{[1]}")
> List<User> searchUsersByCity(@Param("country") String country, @Param("city")
> String city, Pageable pageable);
> {code}
> {code:java}
> // ordered method parameters
> @Query(value = "SELECT * from #{#entityName} where email = ?")
> User searchUserByEmail(String email);
> {code}
> {code:java}
> // Advanced SpEL expressions
> @Query(value = "SELECT * from #{#entityName} where uuidCity =
> ?#{mySpELFunctionsBean.cityNameToUUID(#city)}")
> List<User> searchUsersByCity(@Param("city") String city, Pageable pageable);
> {code}
> {code:java}
> // textQuery - evaluated SpEL named parameter
> @Query(textQuery = true, value = "email: #{#email}")
> User searchUserByEmail(@Param("email") String email);
> {code}
> {code:java}
> // textQuery - evaluated SpEL named parameter
> @Query(textQuery = true, value = "#{#textToSearch}")
> List<User> searchUsersByText(@Param("textToSearch") String text, Pageable
> pageable);
> {code}
> {code:java}
> // textQuery - evaluated SpEL indexed parameter
> @Query(textQuery = true, value = "#{[0]}")
> List<User> searchUsersByText(String textToSearch, Pageable pageable);
> {code}
> {code:java}
> // Static Projection
> @Query(value =
> "SELECT DISTINCT m.id, m.name, m.logos FROM #{#entityName} e
> USE INDEX (ORIGIN_IDX) INNER JOIN \"flightMerchants\".Merchant m ON m"
> + "._key=e"
> + ".merchant WHERE e.origin = :origin and e.disabled =
> :disabled GROUP BY m.id, m.name, m.logos ORDER BY m.name")
> List<AProjection> searchMerchantsByOrigin(@Param("origin") String origin,
> @Param("disabled") boolean disabled);
> {code}
> {code:java}
> // Dynamic Projection
> @Query(value =
> "SELECT DISTINCT m.id, m.name, m.logos FROM #{#entityName} e
> USE INDEX (ORIGIN_IDX) INNER JOIN \"flightMerchants\".Merchant m ON m"
> + "._key=e"
> + ".merchant WHERE e.origin = :origin and e.disabled =
> :disabled GROUP BY m.id, m.name, m.logos ORDER BY m.name")
> <P> List<P> searchMerchantsByOrigin(Class<P> projection, @Param("origin")
> String origin, @Param("disabled") boolean disabled);
> {code}
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