Added showcase for JDK 8's Optional support on repository methods.

Abbreviated JPA sample module folder names. Renamed the Java 8 auditing sample module to Java 8 module as it not only contains samples for auditing anymore.

jpa/showcase/src/test/java/example/springdata/jpa/showcase/AbstractShowcaseTest.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2011-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package example.springdata.jpa.showcase;
+
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.junit4.AbstractTransactionalJUnit4SpringContextTests;
+import org.springframework.test.context.transaction.BeforeTransaction;
+import org.springframework.transaction.annotation.Transactional;
+
+import example.springdata.jpa.showcase.AbstractShowcaseTest.TestConfig;
+
+/**
+ * @author Oliver Gierke
+ */
+@SpringApplicationConfiguration(classes = TestConfig.class)
+@Transactional
+public abstract class AbstractShowcaseTest extends AbstractTransactionalJUnit4SpringContextTests {
+
+	@Configuration
+	@EnableAutoConfiguration
+	@ComponentScan
+	static class TestConfig {
+
+	}
+
+	@BeforeTransaction
+	public void setupData() throws Exception {
+
+		deleteFromTables("account", "customer");
+		executeSqlScript("classpath:data.sql", false);
+	}
+}

jpa/showcase/src/test/java/example/springdata/jpa/showcase/after/AccountRepositoryIntegrationTest.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2011-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package example.springdata.jpa.showcase.after;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import java.util.List;
+
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import example.springdata.jpa.showcase.AbstractShowcaseTest;
+import example.springdata.jpa.showcase.core.Account;
+import example.springdata.jpa.showcase.core.Customer;
+
+/**
+ * Integration tests for Spring Data JPA {@link AccountRepository}.
+ * 
+ * @author Oliver Gierke
+ */
+public class AccountRepositoryIntegrationTest extends AbstractShowcaseTest {
+
+	@Autowired AccountRepository accountRepository;
+	@Autowired CustomerRepository customerRepository;
+
+	@Test
+	public void savesAccount() {
+
+		Account account = accountRepository.save(new Account());
+		assertThat(account.getId(), is(notNullValue()));
+	}
+
+	@Test
+	public void findsCustomersAccounts() {
+
+		Customer customer = customerRepository.findOne(1L);
+		List<Account> accounts = accountRepository.findByCustomer(customer);
+
+		assertFalse(accounts.isEmpty());
+		assertThat(accounts.get(0).getCustomer(), is(customer));
+	}
+}

jpa/showcase/src/test/java/example/springdata/jpa/showcase/after/CustomerRepositoryIntegrationTest.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2011-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package example.springdata.jpa.showcase.after;
+
+import static example.springdata.jpa.showcase.snippets.CustomerSpecifications.*;
+import static org.hamcrest.Matchers.*;
+import static org.junit.Assert.*;
+import static org.springframework.data.jpa.domain.Specifications.*;
+
+import java.util.List;
+
+import org.joda.time.LocalDate;
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+
+import example.springdata.jpa.showcase.AbstractShowcaseTest;
+import example.springdata.jpa.showcase.core.Customer;
+
+/**
+ * Integration tests for Spring Data JPA {@link CustomerRepository}.
+ * 
+ * @author Oliver Gierke
+ */
+public class CustomerRepositoryIntegrationTest extends AbstractShowcaseTest {
+
+	@Autowired CustomerRepository repository;
+
+	@Test
+	public void findsAllCustomers() throws Exception {
+
+		Iterable<Customer> result = repository.findAll();
+
+		assertThat(result, is(notNullValue()));
+		assertTrue(result.iterator().hasNext());
+	}
+
+	@Test
+	public void findsFirstPageOfMatthews() throws Exception {
+
+		Page<Customer> customers = repository.findByLastname("Matthews", new PageRequest(0, 2));
+
+		assertThat(customers.getContent().size(), is(2));
+		assertFalse(customers.hasPreviousPage());
+	}
+
+	@Test
+	public void findsCustomerById() throws Exception {
+
+		Customer customer = repository.findOne(2L);
+
+		assertThat(customer.getFirstname(), is("Carter"));
+		assertThat(customer.getLastname(), is("Beauford"));
+	}
+
+	@Test
+	public void findsCustomersBySpecification() throws Exception {
+
+		Customer dave = repository.findOne(1L);
+
+		LocalDate expiryLimit = new LocalDate(2011, 3, 1);
+		List<Customer> result = repository.findAll(where(accountExpiresBefore(expiryLimit)));
+
+		assertThat(result.size(), is(1));
+		assertThat(result, hasItems(dave));
+	}
+}

jpa/showcase/src/test/java/example/springdata/jpa/showcase/before/AccountServiceIntegrationTest.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2011-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package example.springdata.jpa.showcase.before;
+
+import static org.hamcrest.Matchers.*;
+import static org.junit.Assert.*;
+
+import java.util.List;
+
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import example.springdata.jpa.showcase.AbstractShowcaseTest;
+import example.springdata.jpa.showcase.core.Account;
+import example.springdata.jpa.showcase.core.Customer;
+
+/**
+ * Integration test for {@link AccountService}.
+ * 
+ * @author Oliver Gierke
+ */
+public class AccountServiceIntegrationTest extends AbstractShowcaseTest {
+
+	@Autowired AccountService accountService;
+	@Autowired CustomerService customerService;
+
+	@Test
+	public void savesAccount() {
+
+		Account account = accountService.save(new Account());
+		assertThat(account.getId(), is(notNullValue()));
+	}
+
+	@Test
+	public void testname() throws Exception {
+
+		Customer customer = customerService.findById(1L);
+
+		List<Account> accounts = accountService.findByCustomer(customer);
+
+		assertThat(accounts, is(not(empty())));
+		assertThat(accounts.get(0).getCustomer(), is(customer));
+	}
+}

jpa/showcase/src/test/java/example/springdata/jpa/showcase/before/CustomerServiceIntegrationTest.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2011-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package example.springdata.jpa.showcase.before;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import java.util.List;
+
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import example.springdata.jpa.showcase.AbstractShowcaseTest;
+import example.springdata.jpa.showcase.core.Customer;
+
+/**
+ * Integration test for {@link CustomerService}.
+ * 
+ * @author Oliver Gierke
+ */
+public class CustomerServiceIntegrationTest extends AbstractShowcaseTest {
+
+	@Autowired CustomerService repository;
+
+	@Test
+	public void findsAllCustomers() throws Exception {
+
+		List<Customer> result = repository.findAll();
+
+		assertThat(result, is(notNullValue()));
+		assertFalse(result.isEmpty());
+	}
+
+	@Test
+	public void findsPageOfMatthews() throws Exception {
+
+		List<Customer> customers = repository.findByLastname("Matthews", 0, 2);
+
+		assertThat(customers.size(), is(2));
+	}
+
+	@Test
+	public void findsCustomerById() throws Exception {
+
+		Customer customer = repository.findById(2L);
+
+		assertThat(customer.getFirstname(), is("Carter"));
+		assertThat(customer.getLastname(), is("Beauford"));
+	}
+}

jpa/showcase/src/test/resources/logback.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+
+	<appender name="console" class="ch.qos.logback.core.ConsoleAppender">
+		<encoder>
+			<pattern>%d %5p %40.40c:%4L - %m%n</pattern>
+		</encoder>
+	</appender>
+	
+	<logger name="org.springframework.data" level="debug" />
+
+	<root level="info">
+		<appender-ref ref="console" />
+	</root>
+
+</configuration>