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#19 - Add example for Spring Data Cassandra.

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Shows java-config as well as Repository configuration.
This commit is contained in:
Thomas Darimont
2014-10-07 20:28:41 +02:00
parent eeb0485cf9
commit 4841bbdc11
9 changed files with 289 additions and 0 deletions
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cassandra/example/Readme.MD Normal file
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# Spring Data Cassandra Example Application
## Preparation
### Install Cassandra
Before we can start we have to install Cassandra, e.g. via brew on Max OS.
```
brew install cassandra
pip install cassandra-driver
brew install cassandra-driver
More details can be found here: https://wiki.apache.org/cassandra/GettingStarted
```
### Start Cassandra
```
/usr/local/bin/cassandra -f
```
### Start a Cassandra shell cqlsh
```
/usr/local/bin/cqlsh
```
### Setup Keyspace and Tables
```
CREATE KEYSPACE example
WITH REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };
USE example;
CREATE TABLE users (
user_id int PRIMARY KEY,
uname text,
fname text,
lname text
);
```
That should be enough to get you started.
Now you can simply type ```mvn clean install``` to run the example.

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cassandra/example/pom.xml Normal file
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<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-data-cassandra-example</artifactId>
<parent>
<groupId>org.springframework.data.examples</groupId>
<artifactId>spring-data-cassandra-examples</artifactId>
<version>1.0.0.BUILD-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>
<name>Spring Data Cassandra - Example</name>
<description>Small sample project showing the usage of Spring Data Cassandra.</description>
</project>

49
cassandra/example/src/main/java/example/springdata/cassandra/simple/SimpleConfiguration.java Normal file
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/*
* 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);
}
}
}

26
cassandra/example/src/main/java/example/springdata/cassandra/simple/SimpleUserRepository.java Normal file
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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> {}

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cassandra/example/src/main/java/example/springdata/cassandra/simple/User.java Normal file
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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);
}
}

5
cassandra/example/src/main/java/example/springdata/cassandra/simple/package-info.java Normal file
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/**
* Package showing a simple repository interface to use basic query method execution functionality.
*/
package example.springdata.cassandra.simple;

61
cassandra/example/src/test/java/example/springdata/cassandra/simple/SimpleUserRepositoryTests.java Normal file
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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));
}
}

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cassandra/pom.xml Normal file
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<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>
<artifactId>spring-data-cassandra-examples</artifactId>
<packaging>pom</packaging>
<parent>
<groupId>org.springframework.data.examples</groupId>
<artifactId>spring-data-examples</artifactId>
<version>1.0.0.BUILD-SNAPSHOT</version>
</parent>
<name>Spring Data Cassandra - Examples</name>
<description>Sample projects for Spring Data Cassandra</description>
<url>http://projects.spring.io/spring-data-cassandra</url>
<inceptionYear>2014</inceptionYear>
<modules>
<module>example</module>
</modules>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-cassandra</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</project>

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pom.xml
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<module>rest</module>
<module>redis</module>
<module>solr</module>
<module>cassandra</module>
</modules>
<properties>