ssouris

loadbalancer <-> NB : Load Balance me

NB.shape: cloud


NB -- backend -> DB

DB --> NB

backend {

ssouris

plugins {
	id 'org.springframework.boot' version '3.0.0'
	id 'io.spring.dependency-management' version '1.1.0'
	id 'org.jetbrains.kotlin.jvm' version '1.7.21'
	id 'org.jetbrains.kotlin.plugin.spring' version '1.7.21'
}

ssouris

{
   "size" : 0,
   "aggs": {
      "groupByCid": {
         "terms": {
            "field": "cid.keyword",
            "size": 1000,
         },
         "aggs": { 
            "groupByOpName": { 

ssouris

::: {node1.mycompany.net}{9GFXG3OWTsqz-dzQQblUmw}{UUtKg-5cSuaZuKtQAjfnMA}{10.48.112.217}{10.48.112.217:9300}{di}{aws_az=us-west-1b, xpack.installed=true}
   Hot threads at 2020-05-18T20:16:02.896Z, interval=500ms, busiestThreads=3, ignoreIdleThreads=true:

    6.1% (30.3ms out of 500ms) cpu usage by thread 'elasticsearch[node1.mycompany.net][write][T#2]'
     unique snapshot
       java.base@13.0.2/java.util.stream.Streams$ConcatSpliterator.<init>(Streams.java:705)
       java.base@13.0.2/java.util.stream.Streams$ConcatSpliterator$OfRef.<init>(Streams.java:773)
       java.base@13.0.2/java.util.stream.Stream.concat(Stream.java:1380)
       app//org.elasticsearch.common.util.concurrent.ThreadContext$ThreadContextStruct.putResponseHeaders(ThreadContext.java:522)
       app//org.elasticsearch.common.util.concurrent.ThreadContext$ThreadContextStruct.access$1900(ThreadContext.java:440)

ssouris

@Autowired
lateinit var petRepository: PetRepository

ssouris

fun goToOwnersIndex() : Mono<ServerResponse> {
  return ok().html().render("owners/index",
    mapOf("owners" to ownersRepository.findAll().map { Pair(it, emptySet<Pet>()) },
          "pets" to petRepository.findAll().collectMultimap { it.owner }))
}

// using type inference
fun goToOwnersIndex() = ok().html().render("owners/index",
  mapOf("owners" to ownersRepository.findAll().map { Pair(it, emptySet<Pet>()) },

ssouris

fun LocalDate.toStr(format:String = "dd/MM/yyyy") = DateTimeFormatter.ofPattern(format).format(this)

fun String.toDate(format:String = "dd/MM/yyyy") = LocalDate.parse(this, DateTimeFormatter.ofPattern(format))

@Test
fun `Test LocalDate#toStr extension method`() {
  Assert.assertEquals(LocalDate.of(1970, 1, 1).toStr(), "01/01/1970")
}

ssouris

@FunctionalInterface
public interface RouterFunction<T extends ServerResponse> {
  
	Mono<HandlerFunction<T>> route(ServerRequest request);
...
}

ssouris

public interface Servlet {
  ...
  public void service(ServletRequest req, ServletResponse res)
	throws ServletException, IOException;
  ...
}

ssouris

@FunctionalInterface
public interface HandlerFunction<T extends ServerResponse> {

  Mono<T> handle(ServerRequest request);

}