BAEL-1107 : Introduction to Apache Cayenne Orm (#2650)

* Different types of bean injection in Spring * Difference between two dates in java * Update README.md * Simple clean of difference between dates * Clean my test article * Improve dates diff: for dates and datetimes * Move difference between dates from core-java to libraries * BAEL-890 - Kotlin-Allopen with Spring example * BAEL-1107 - Introduction to Apache Cayenne Orm
2017-09-21 02:01:43 +01:00
parent 1852438f6a
commit 16b6e089c6
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+package com.baeldung.apachecayenne;
+
+import com.baeldung.apachecayenne.persistent.Article;
+import com.baeldung.apachecayenne.persistent.Author;
+import org.apache.cayenne.ObjectContext;
+import org.apache.cayenne.configuration.server.ServerRuntime;
+import org.apache.cayenne.query.ObjectSelect;
+import org.apache.cayenne.query.SQLTemplate;
+import org.junit.After;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.util.List;
+
+import static junit.framework.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+
+public class CayenneOperationTests {
+    private static ObjectContext context = null;
+
+    @BeforeClass
+    public static void setupTheCayenneContext(){
+        ServerRuntime cayenneRuntime = ServerRuntime.builder()
+                .addConfig("cayenne-project.xml")
+                .build();
+        context = cayenneRuntime.newContext();
+    }
+
+    @After
+    public void deleteAllRecords(){
+        SQLTemplate deleteArticles = new SQLTemplate(Article.class, "delete from article");
+        SQLTemplate deleteAuthors = new SQLTemplate(Author.class, "delete from author");
+
+        context.performGenericQuery(deleteArticles);
+        context.performGenericQuery(deleteAuthors);
+    }
+
+    @Test
+    public void givenAuthor_whenInsert_thenWeGetOneRecordInTheDatabase(){
+        Author author = context.newObject(Author.class);
+        author.setFirstname("Paul");
+        author.setLastname("Smith");
+
+        context.commitChanges();
+
+        long records = ObjectSelect.dataRowQuery(Author.class).selectCount(context);
+        assertEquals(1, records);
+    }
+
+    @Test
+    public void givenAuthor_whenInsert_andQueryByFirstName_thenWeGetTheAuthor(){
+        Author author = context.newObject(Author.class);
+        author.setFirstname("Paul");
+        author.setLastname("Smith");
+
+        context.commitChanges();
+
+        Author expectedAuthor = ObjectSelect.query(Author.class)
+                .where(Author.FIRSTNAME.eq("Paul"))
+                .selectOne(context);
+
+        assertEquals("Paul", expectedAuthor.getFirstname());
+        assertEquals("Smith", expectedAuthor.getLastname());
+    }
+
+    @Test
+    public void givenTwoAuthor_whenInsert_andQueryAll_thenWeGetTwoAuthors(){
+        Author firstAuthor = context.newObject(Author.class);
+        firstAuthor.setFirstname("Paul");
+        firstAuthor.setLastname("Smith");
+
+        Author secondAuthor = context.newObject(Author.class);
+        secondAuthor.setFirstname("Ludovic");
+        secondAuthor.setLastname("Garcia");
+
+        context.commitChanges();
+
+        List<Author> authors = ObjectSelect.query(Author.class).select(context);
+        assertEquals(2, authors.size());
+    }
+
+    @Test
+    public void givenAuthor_whenUpdating_thenWeGetAnUpatedeAuthor(){
+        Author author = context.newObject(Author.class);
+        author.setFirstname("Paul");
+        author.setLastname("Smith");
+        context.commitChanges();
+
+        Author expectedAuthor = ObjectSelect.query(Author.class)
+                .where(Author.FIRSTNAME.eq("Paul"))
+                .selectOne(context);
+        expectedAuthor.setLastname("Smith 2");
+        context.commitChanges();
+
+        assertEquals(author.getFirstname(), expectedAuthor.getFirstname());
+        assertEquals(author.getLastname(), expectedAuthor.getLastname());
+    }
+
+    @Test
+    public void givenAuthor_whenDeleting_thenWeLostHisDetails(){
+        Author author = context.newObject(Author.class);
+        author.setFirstname("Paul");
+        author.setLastname("Smith");
+        context.commitChanges();
+
+        Author savedAuthor = ObjectSelect.query(Author.class)
+                .where(Author.FIRSTNAME.eq("Paul")).selectOne(context);
+        if(savedAuthor != null) {
+            context.deleteObjects(author);
+            context.commitChanges();
+        }
+
+        Author expectedAuthor = ObjectSelect.query(Author.class)
+                .where(Author.FIRSTNAME.eq("Paul")).selectOne(context);
+        assertNull(expectedAuthor);
+    }
+
+    @Test
+    public void givenAuthor_whenAttachingToArticle_thenTheRelationIsMade(){
+        Author author = context.newObject(Author.class);
+        author.setFirstname("Paul");
+        author.setLastname("Smith");
+
+        Article article = context.newObject(Article.class);
+        article.setTitle("My post title");
+        article.setContent("The content");
+        article.setAuthor(author);
+
+        context.commitChanges();
+
+        Author expectedAuthor = ObjectSelect.query(Author.class)
+                .where(Author.LASTNAME.eq("Smith"))
+                .selectOne(context);
+
+        Article expectedArticle = (expectedAuthor.getArticles()).get(0);
+        assertEquals(article.getTitle(), expectedArticle.getTitle());
+    }
+
+}