Created
May 17, 2022 22:08
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Connection pool - Limit release example
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package br.com.studylibrary | |
import com.zaxxer.hikari.HikariConfig | |
import com.zaxxer.hikari.HikariDataSource | |
import java.time.Instant.now | |
import java.util.Timer | |
import kotlin.concurrent.schedule | |
import kotlin.system.exitProcess | |
fun main() { | |
val dataSource = HikariDataSource(HikariConfig().apply { | |
jdbcUrl = "jdbc:postgresql://localhost:5432/postgres" | |
username = "postgres" | |
password = "test_postgres" | |
}) | |
repeat(times = 9) { dataSource.connection } | |
val lastConnection = dataSource.connection // Abre a última conexão e obtém a referência | |
Timer().schedule(2000) { // Fecha a última conexão após 2s | |
lastConnection.close() | |
printlnWithTime("Conexão liberada após 2s") | |
exitProcess(status = 0) // Termina o programa, para não esperar a thread do timer | |
} | |
printlnWithTime("Aguardando conexão") | |
// A conexão ficará parada na linha abaixo até que a última execução seja liberada após 2s | |
dataSource.connection | |
} | |
private fun printlnWithTime(text: String) = println("[${now()}] $text") |
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