jpa_base_dao impl

.gitignore

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+

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.loafle</groupId>
+        <artifactId>maven_parent_jar</artifactId>
+        <version>1.0.0-RELEASE</version>
+    </parent>
+
+    <groupId>com.loafle</groupId>
+    <artifactId>jpa_base_dao</artifactId>
+    <packaging>jar</packaging>
+    <version>1.0.0-RELEASE</version>
+    <name>com.loafle.jpa_base_dao</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.loafle</groupId>
+            <artifactId>overflow_base_dao</artifactId>
+            <version>1.0.0-RELEASE</version>
+        </dependency>
+
+        <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager -->
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-entitymanager</artifactId>
+            <version>5.2.10.Final</version>
+        </dependency>
+
+    </dependencies>
+
+</project>

src/main/java/com/loafle/overflow/commons/dao/JPABaseDAO.java

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+package com.loafle.overflow.commons.dao;
+
+import javax.persistence.EntityManager;
+import javax.persistence.Persistence;
+import javax.persistence.PersistenceContext;
+import java.lang.reflect.ParameterizedType;
+
+/**
+ * Created by insanity on 17. 5. 25.
+ */
+public class JPABaseDAO<T> implements BaseDAO<T>  {
+
+    @PersistenceContext
+    private EntityManager entityManager;
+    private final Class<T> entityType;
+
+    public JPABaseDAO() {
+        this.entityManager = Persistence.createEntityManagerFactory("overflow").createEntityManager();
+        this.entityType = ((Class<T>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0]);
+    }
+
+    protected EntityManager getEntityManager() {
+        return this.entityManager;
+    }
+
+    public T find(T entity)
+    {
+        return this.entityManager.find(entityType, entity);
+    }
+
+    public T create(T entity) {
+        this.entityManager.getTransaction().begin();
+        this.entityManager.persist(entity);
+        this.entityManager.getTransaction().commit();
+        return entity;
+    }
+
+    public T update(T entity) {
+        this.entityManager.getTransaction().begin();
+        T result = this.entityManager.merge(entity);
+        this.entityManager.getTransaction().commit();
+        return result;
+    }
+
+    public void delete(T entity) {
+        this.entityManager.getTransaction().begin();
+        this.entityManager.remove(entityManager.contains(entity) ? entity : entityManager.merge(entity));
+        this.entityManager.getTransaction().commit();
+    }
+}

src/test/java/com/loafle/AppTest.java

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+
+package com.loafle;
+import static org.junit.Assert.*;
+
+import org.junit.Ignore;
+import org.junit.Test;
+
+@Ignore
+public class AppTest {
+    @Test
+    public void testSum() {
+        fail("Not yet implemented");
+    }
+}

src/test/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="3 seconds">
+    <contextName>jpa_base_dao</contextName>
+    <!-- TRACE > DEBUG > INFO > WARN > ERROR -->
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>
+                %d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{32} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="DEBUG">
+        <appender-ref ref="STDOUT" />
+    </root>
+    <logger name="com.loafle" level="ALL" />
+</configuration>