#580 - Add Cassandra examples for optimistic locking.

cassandra/example/src/main/java/example/springdata/cassandra/optimisticlocking/BasicConfiguration.java

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+/*
+ * Copyright 2020 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.optimisticlocking;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Basic {@link Configuration} to create the necessary schema for the {@link OptimisticPerson} table.
+ *
+ * @author Mark Paluch
+ */
+@SpringBootApplication
+@EntityScan(basePackageClasses = OptimisticPerson.class)
+class BasicConfiguration {
+
+}

cassandra/example/src/main/java/example/springdata/cassandra/optimisticlocking/OptimisticPerson.java

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+/*
+ * Copyright 2020 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.optimisticlocking;
+
+import lombok.Data;
+
+import org.springframework.data.annotation.Id;
+import org.springframework.data.annotation.Version;
+import org.springframework.data.cassandra.core.mapping.Table;
+
+/**
+ * Simple domain object that declares properties annotated with Spring Data's {@code @Version} annotation to enable the
+ * object for optimistic locking.
+ *
+ * @author Mark Paluch
+ */
+@Data
+@Table
+public class OptimisticPerson {
+
+	@Id Long id;
+
+	@Version long version;
+
+	String name;
+
+}

cassandra/example/src/main/java/example/springdata/cassandra/optimisticlocking/OptimisticPersonRepository.java

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+/*
+ * Copyright 2020 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.optimisticlocking;
+
+import org.springframework.data.repository.CrudRepository;
+
+/**
+ * Simple repository interface for {@link OptimisticPerson} instances.
+ *
+ * @author Mark Paluch
+ */
+public interface OptimisticPersonRepository extends CrudRepository<OptimisticPerson, Long> {}

cassandra/example/src/main/java/example/springdata/cassandra/optimisticlocking/SimplePerson.java

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+/*
+ * Copyright 2020 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.optimisticlocking;
+
+import lombok.Data;
+
+import org.springframework.data.annotation.Id;
+import org.springframework.data.cassandra.core.mapping.Table;
+
+/**
+ * Simple domain object.
+ *
+ * @author Mark Paluch
+ */
+@Data
+@Table
+public class SimplePerson {
+
+	@Id Long id;
+
+	String name;
+
+}