new custom query operation for spring data and tests

Author: eugenp

spring-security-rest-full/src/main/java/org/baeldung/persistence/dao/IFooDao.java

@@ -4,10 +4,11 @@
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
 import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 
 public interface IFooDao extends JpaRepository<Foo, Long>, JpaSpecificationExecutor<Foo> {
 
     @Query("SELECT f FROM Foo f WHERE LOWER(f.name) = LOWER(:name)")
-    Foo retrieveByName(String name);
+    Foo retrieveByName(@Param("name") String name);
 
 }

spring-security-rest-full/src/main/java/org/baeldung/persistence/service/IFooService.java

@@ -4,5 +4,7 @@
 import org.baeldung.persistence.model.Foo;
 
 public interface IFooService extends IOperations<Foo> {
-    //
+
+    Foo retrieveByName(String name);
+
 }

spring-security-rest-full/src/main/java/org/baeldung/persistence/service/impl/FooService.java

@@ -32,6 +32,12 @@ protected PagingAndSortingRepository<Foo, Long> getDao() {
         return dao;
     }
 
+    // custom methods
+
+    public Foo retrieveByName(final String name) {
+        return dao.retrieveByName(name);
+    }
+
     // overridden to be secured
 
     @Override

spring-security-rest-full/src/test/java/org/baeldung/persistence/service/FooServicePersistenceIntegrationTest.java

@@ -1,6 +1,7 @@
 package org.baeldung.persistence.service;
 
 import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
+import static org.junit.Assert.assertNotNull;
 
 import org.baeldung.persistence.IOperations;
 import org.baeldung.persistence.model.Foo;
@@ -39,16 +40,20 @@ public final void whenInvalidEntityIsCreated_thenDataException() {
         service.create(new Foo());
     }
 
-    // @Test(expected = DataIntegrityViolationException.class)
-    // public final void whenEntityWithLongNameIsCreated_thenDataException() {
-    // service.create(new Foo(randomAlphabetic(2048)));
-    // }
+    @Test(expected = DataIntegrityViolationException.class)
+    public final void whenEntityWithLongNameIsCreated_thenDataException() {
+        service.create(new Foo(randomAlphabetic(2048)));
+    }
 
     // custom Query method
 
     @Test
-    public final void givenUsingCustomQuery_whenExecuting_thenNoExceptions() {
-        // service.create(new Foo(randomAlphabetic(2048)));
+    public final void givenUsingCustomQuery_whenRetrievingEntity_thenFound() {
+        final String name = randomAlphabetic(6);
+        service.create(new Foo(name));
+
+        final Foo retrievedByName = service.retrieveByName(name);
+        assertNotNull(retrievedByName);
     }
 
     // work in progress