Design
Micronaut is a microservice framework for building moudlar applications. This develops a configuration that bests works with Micronaut.
Auto-Configuration
Application yaml configuration.
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language | yml |
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title | example config |
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ignite:
enabled: true
comunication-spi:
local-port: 5555
cache-configurations:
- accounts:
table-name: ACCOUNTS
key-type: String
- books:
table-name: BOOKS
key-type: String
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- default is the primary bean
- path loads in a spring bean definition
Ignite factory configuration
A bean for an IgniteConfiguration can be provided from a factory.
Example:
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@Factory
public class MyFactory {
@Singleton
@Bean
@Primary
@Named("default")
IgniteConfiguration defaultConfiguration() {
IgniteConfiguration cfg = new IgniteConfiguration();
// The node will be started as a client node.
cfg.setClientMode(true);
// Setting up an IP Finder to ensure the client can locate the servers.
TcpDiscoveryMulticastIpFinder ipFinder = new TcpDiscoveryMulticastIpFinder();
ipFinder.setAddresses(Collections.singletonList("localhost:47500..47509"));
cfg.setDiscoverySpi(new TcpDiscoverySpi().setIpFinder(ipFinder));
return cfg;
}
}
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Micronaut Ignite Cache
Micronaut cache is covered under snapshot documentation. By default the primary Ignite instance is used for Micronaut cache and the key from for each cache operation will refer to the IgniteCache instance.
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language | java |
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title | IgniteCacheManager |
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collapse | true |
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@Singleton
public class IgniteCacheManager implements DynamicCacheManager<IgniteCache> {
private final Ignite ignite;
private final ConversionService<?> service;
private final ExecutorService executorService;
public IgniteCacheManager(@Primary Ignite ignite,
ConversionService<?> service,
@Named(TaskExecutors.IO) ExecutorService executorService) {
this.ignite = ignite;
this.service = service;
this.executorService = executorService;
}
@NonNull
@Override
public SyncCache<IgniteCache> getCache(String name) {
return new IgniteSyncCache(service, ignite.getOrCreateCache(name), executorService);
}
}
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Example
This is an example of a service using Micronaut Cache.
Code Block |
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language | java |
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title | Example Cacheable Object |
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collapse | true |
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@Singleton
@CacheConfig('counter')
static class CounterService {
Map<String, Integer> counters = new LinkedHashMap<>()
Map<String, Integer> counters2 = new LinkedHashMap<>()
int incrementNoCache(String name) {
int value = counters.computeIfAbsent(name, { 0 })
counters.put(name, ++value)
return value
}
@CachePut
int increment(String name) {
int value = counters.computeIfAbsent(name, { 0 })
counters.put(name, ++value)
return value
}
@PutOperations([
@CachePut('counter'),
@CachePut('counter2')
])
int increment2(String name) {
int value = counters2.computeIfAbsent(name, { 0 })
counters2.put(name, ++value)
return value
}
@Cacheable
CompletableFuture<Integer> futureValue(String name) {
return CompletableFuture.completedFuture(counters.computeIfAbsent(name, { 0 }))
}
@Cacheable
@SingleResult
Flowable<Integer> flowableValue(String name) {
return Flowable.just(counters.computeIfAbsent(name, { 0 }))
}
@Cacheable
Single<Integer> singleValue(String name) {
return Single.just(counters.computeIfAbsent(name, { 0 }))
}
@CachePut
CompletableFuture<Integer> futureIncrement(String name) {
int value = counters.computeIfAbsent(name, { 0 })
counters.put(name, ++value)
return CompletableFuture.completedFuture(value)
}
@Cacheable
int getValue(String name) {
return counters.computeIfAbsent(name, { 0 })
}
@Cacheable('counter2')
int getValue2(String name) {
return counters2.computeIfAbsent(name, { 0 })
}
@Cacheable
Optional<Integer> getOptionalValue(String name) {
return Optional.ofNullable(counters.get(name))
}
@CacheInvalidate(all = true)
void reset() {
counters.clear()
}
@CacheInvalidate
void reset(String name) {
counters.remove(name)
}
@InvalidateOperations([
@CacheInvalidate('counter'),
@CacheInvalidate('counter2')
])
void reset2(String name) {
counters.remove(name)
}
@CacheInvalidate(parameters = 'name')
void set(String name, int val) {
counters.put(name, val)
}
} |
Micronaut Ignite Application