#19 - Add example for Spring Data Cassandra.

Shows java-config as well as Repository configuration.

cassandra/example/src/main/java/example/springdata/cassandra/simple/SimpleConfiguration.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 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.cassandra.simple;
+
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.cassandra.config.java.AbstractCqlTemplateConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.cassandra.core.CassandraTemplate;
+import org.springframework.data.cassandra.repository.config.EnableCassandraRepositories;
+
+import com.datastax.driver.core.Session;
+
+/**
+ * @author Oliver Gierke
+ * @author Thomas Darimont
+ */
+@Configuration
+@EnableAutoConfiguration
+class SimpleConfiguration {
+
+	@Configuration
+	@EnableCassandraRepositories
+	static class CassandraConfig extends AbstractCqlTemplateConfiguration {
+
+		@Override
+		public String getKeyspaceName() {
+			return "example";
+		}
+		
+		@Bean
+		public CassandraTemplate cassandraTemplate(Session session) {
+			return new CassandraTemplate(session);
+		}
+	}
+}

cassandra/example/src/main/java/example/springdata/cassandra/simple/SimpleUserRepository.java

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+/*
+ * Copyright 2013-2014 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.cassandra.simple;
+
+import org.springframework.data.repository.CrudRepository;
+
+/**
+ * Simple repository interface for {@link User} instances. The interface is used to declare so called query methods,
+ * methods to retrieve single entities or collections of them.
+ * 
+ * @author Thomas Darimont
+ */
+public interface SimpleUserRepository extends CrudRepository<User, Long> {}

cassandra/example/src/main/java/example/springdata/cassandra/simple/User.java

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+/*
+ * Copyright 2013-2014 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.cassandra.simple;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import org.springframework.data.cassandra.mapping.Column;
+import org.springframework.data.cassandra.mapping.PrimaryKey;
+import org.springframework.data.cassandra.mapping.Table;
+
+/**
+ * Sample user class.
+ * 
+ * @author Oliver Gierke
+ * @author Thomas Darimont
+ */
+@Data
+@NoArgsConstructor
+@Table(value = "users")
+public class User {
+
+	@PrimaryKey("user_id") private Long id;
+
+	@Column("uname") private String username;
+	@Column("fname") private String firstname;
+	@Column("lname") private String lastname;
+
+	public User(Long id) {
+		this.setId(id);
+	}
+}

cassandra/example/src/main/java/example/springdata/cassandra/simple/package-info.java

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+/**
+ * Package showing a simple repository interface to use basic query method execution functionality.
+ */
+package example.springdata.cassandra.simple;
+

cassandra/example/src/test/java/example/springdata/cassandra/simple/SimpleUserRepositoryTests.java

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+/*
+ * Copyright 2013-2014 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.cassandra.simple;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import org.junit.Before;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+/**
+ * Integration test showing the basic usage of {@link SimpleUserRepository}.
+ * 
+ * @author Oliver Gierke
+ * @author Thomas Darimont
+ * @author Christoph Strobl
+ */
+@Ignore
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = SimpleConfiguration.class)
+public class SimpleUserRepositoryTests {
+
+	@Autowired SimpleUserRepository repository;
+	User user;
+
+	@Before
+	public void setUp() {
+
+		user = new User();
+		user.setId(42L);
+		user.setUsername("foobar");
+		user.setFirstname("firstname");
+		user.setLastname("lastname");
+	}
+
+	@Test
+	public void findSavedUserById() {
+
+		user = repository.save(user);
+
+		assertThat(repository.findOne(user.getId()), is(user));
+	}
+}