Spring Boot on GCP
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Getting Started
Application Development
Additional Resources
Memorystore Memcached (beta)
Memorystore Memcached Instance
Enable API
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gcloud services enable servicenetworking.googleapis.com
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gcloud services enable memcache.googleapis.com
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Enabling this API may take a few minutes.
Enable Private Service Access
Memorystore Memcached requires Private Services Access to be enabled. See Establishing a private services access connection documentation for more information.
Reserve an IP address range to be used in a VPC, so that the Memcached instance's IP address can be allocated within this range:
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gcloud beta compute addresses create reserved-range \
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--global --prefix-length=24 \
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--description=description --network=default \
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--purpose=vpc_peering
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This is a simplified range creation on the
default VPC network. In a production environment, you should verify what the range should be and which VPC network to allocate in.Establish peering so that Memorystore can allocate the IP address in the reserved range in the VPC.
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gcloud services vpc-peerings connect \
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--service=servicenetworking.googleapis.com \
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--ranges=reserved-range --network=default
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Create an Instance
Create an instance and attach it to the default VPC.
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gcloud beta memcache instances create orders-cache \
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--node-count=1 --node-cpu=1 --node-memory=1G --region=us-central1
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Creating a Memcached instance may take a few minutes.
Get Instance IP Address
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gcloud beta memcache instances describe orders-cache \
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--region=us-central1 --format="value(memcacheNodes.host)"
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The IP address is not a static IP address. If you create the instance, the IP address may be different.
Connect to Instance
See Memorystore connectivity options to see how to connect to a Memorystore instance from different computing environments.
Computing Environment
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Compute Engine
Kubernetes Engine
App Engine Flexible
App Engine Standard
Cloud Run
Cloud Function
You can test quickly by creating a Compute Engine instance in a zone within the same region:
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gcloud compute instances create test-memorystore-vm --zone=us-central1-c
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SSH into the machine:
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gcloud compute ssh test-memorystore-vm --zone=us-central1-c
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Install
redis-cli:1
sudo apt-get update && sudo apt-get install -y telnet
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Connect to the instance:
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telnet <MEMORYSTORE_MEMCACHED_IP> 11211
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You can try different Memcached commands, for example,
stats:1
Trying ...
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Connected to 10.111.98.4.
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Escape character is '^]'.
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stats
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STAT pid 1
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STAT uptime 1020
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STAT time 1594348128
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...
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END
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quit
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Connection closed by foreign host.
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Spring Boot Cache
Spring Boot does not have a built-in Memcached support. However you can use a 3rd party Memcached starter to provide Spring Boot cache support, e.g.:
Dependency
Add the 3rd party Memcached Spring Boot starter:
Maven
Gradle
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<dependency>
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<groupId>io.sixhours</groupId>
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<artifactId>memcached-spring-boot-starter</artifactId>
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<version>2.1.2</version>
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</dependency>
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compile group: 'io.sixhours', name: 'memcached-spring-boot-starter:2.1.2'
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Configuration
Configure the Memcached instance to connect to:
application.properties
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memcached.cache.servers=<MEMORYSTORE_MEMCACHED_IP>:11211
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memcached.cache.provider=static
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Enable Caching
Turn on caching capability explicitly with the
@EnableCaching annotation:1
@SpringBootApplication
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@EnableCaching
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class DemoApplication {
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...
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}
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Cacheable
Once you configured the Spring Boot with Redis and enabled caching, you can use the
@Cacheable annotation to cache return values.1
@Service
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class OrderService {
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private final OrderRepository orderRepository;
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public OrderService(OrderRepository orderRepository) {
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this.orderRepository = orderRepository;
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}
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@Cacheable("order")
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public Order getOrder(Long id) {
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orderRepository.findById(id);
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}
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}
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Last modified 1yr ago