Couchbase

Couchbase is an open-source, distributed, multi-model NoSQL document-oriented database that is optimized for interactive applications. Spring Boot offers auto-configuration for Couchbase and the abstractions on top of it provided by Spring Data Couchbase. There are spring-boot-starter-data-couchbase and spring-boot-starter-data-couchbase-reactive “Starters” for collecting the dependencies in a convenient way.

Connecting to Couchbase

You can get a Cluster by adding the Couchbase SDK and some configuration. The spring.couchbase.* properties can be used to customize the connection. Generally, you provide the connection string, username, and password, as shown in the following example:

Properties
YAML

spring.couchbase.connection-string=couchbase://192.168.1.123
spring.couchbase.username=user
spring.couchbase.password=secret

spring:
  couchbase:
    connection-string: "couchbase://192.168.1.123"
    username: "user"
    password: "secret"

It is also possible to customize some of the ClusterEnvironment settings. For instance, the following configuration changes the timeout to open a new Bucket and enables SSL support:

Properties
YAML

spring.couchbase.env.timeouts.connect=3s
spring.couchbase.env.ssl.key-store=/location/of/keystore.jks
spring.couchbase.env.ssl.key-store-password=secret

spring:
  couchbase:
    env:
      timeouts:
        connect: "3s"
      ssl:
        key-store: "/location/of/keystore.jks"
        key-store-password: "secret"

Check the spring.couchbase.env.* properties for more details. To take more control, one or more ClusterEnvironmentBuilderCustomizer beans can be used.

Spring Data Couchbase Repositories

Spring Data includes repository support for Couchbase. For complete details of Spring Data Couchbase, see the reference documentation.

You can inject an auto-configured CouchbaseTemplate instance as you would with any other Spring Bean, provided a CouchbaseClientFactory bean is available. This happens when a Cluster is available, as described above, and a bucket name has been specified:

Properties
YAML

spring.data.couchbase.bucket-name=my-bucket

spring:
  data:
    couchbase:
      bucket-name: "my-bucket"

The following examples shows how to inject a CouchbaseTemplate bean:

Java
Kotlin

import org.springframework.data.couchbase.core.CouchbaseTemplate;
import org.springframework.stereotype.Component;

@Component
public class MyBean {

	private final CouchbaseTemplate template;

	public MyBean(CouchbaseTemplate template) {
		this.template = template;
	}

	// ...

	public String someMethod() {
		return this.template.getBucketName();
	}

}

import org.springframework.data.couchbase.core.CouchbaseTemplate
import org.springframework.stereotype.Component

@Component
class MyBean(private val template: CouchbaseTemplate) {

	// ...

	fun someMethod(): String {
		return template.bucketName
	}

}

There are a few beans that you can define in your own configuration to override those provided by the auto-configuration:

A CouchbaseMappingContext @Bean with a name of couchbaseMappingContext.
A CustomConversions @Bean with a name of couchbaseCustomConversions.
A CouchbaseTemplate @Bean with a name of couchbaseTemplate.

To avoid hard-coding those names in your own config, you can reuse BeanNames provided by Spring Data Couchbase. For instance, you can customize the converters to use, as follows:

Java
Kotlin

import org.assertj.core.util.Arrays;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.couchbase.config.BeanNames;
import org.springframework.data.couchbase.core.convert.CouchbaseCustomConversions;

@Configuration(proxyBeanMethods = false)
public class MyCouchbaseConfiguration {

	@Bean(BeanNames.COUCHBASE_CUSTOM_CONVERSIONS)
	public CouchbaseCustomConversions myCustomConversions() {
		return new CouchbaseCustomConversions(Arrays.asList(new MyConverter()));
	}

}

import org.assertj.core.util.Arrays
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.data.couchbase.config.BeanNames
import org.springframework.data.couchbase.core.convert.CouchbaseCustomConversions

@Configuration(proxyBeanMethods = false)
class MyCouchbaseConfiguration {

	@Bean(BeanNames.COUCHBASE_CUSTOM_CONVERSIONS)
	fun myCustomConversions(): CouchbaseCustomConversions {
		return CouchbaseCustomConversions(Arrays.asList(MyConverter()))
	}

}