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@carlosedp
Last active March 20, 2024 00:57
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Scala ZIO-HTTP with logback and GraalVM native-image binary support
// Run with scala-cli httpserver.scala
// Save logback.xml file into ./resources dir
// Before generating native image binary, run first as above and make a real access to the URL
// so the native-image-agent can generate the metadata in ./resources dir.
// Then generate native image binary with: scala-cli package --native-image httpserver.scala
//> using scala "3.3.0"
//> using lib "dev.zio::zio:2.0.15"
//> using lib "dev.zio::zio-http:3.0.0-RC2"
//> using lib "dev.zio::zio-logging-slf4j2::2.1.13"
//> using lib "ch.qos.logback:logback-classic:1.4.8"
// This runs the app with the native-image-agent to generate the metadata before generating the native image binary
//> using javaOpt -agentlib:native-image-agent=config-merge-dir=resources/META-INF/native-image
//> using resourceDir ./resources
// Optional imports to prevent native-image warnings as described in https://github.com/zio/zio-http/issues/2007
//> using lib "net.jpountz.lz4:lz4:1.3.0"
//> using lib "org.jboss.marshalling:jboss-marshalling:2.1.1.Final"
//> using lib "com.google.protobuf:protobuf-java:2.6.1"
// GraalVM options needed by netty
//> using packaging.graalvmArgs --no-fallback
//> using packaging.graalvmArgs --enable-http
//> using packaging.graalvmArgs --enable-url-protocols=http,https
//> using packaging.graalvmArgs --install-exit-handlers
//> using packaging.graalvmArgs -Djdk.http.auth.tunneling.disabledSchemes=
// Here we ignore the graalvm initialization flags set by the libs themselves
//> using packaging.graalvmArgs --exclude-config .*.jar,.*.properties
package httpserver
import zio.*
import zio.http.*
import zio.logging.backend.SLF4J
object ZIOHTTPServer extends ZIOAppDefault:
override val bootstrap: ZLayer[ZIOAppArgs, Any, Any] =
Runtime.removeDefaultLoggers >>> SLF4J.slf4j
val app: HttpApp[Any, Nothing] = Http.collectZIO[Request] {
case Method.GET -> Root / "text" =>
ZIO.logDebug("Request received") *>
ZIO.succeed(Response.text("Hello World!"))
}
override val run =
ZIO.logInfo("Server started in http://localhost:8080/text") *>
Server.serve(app).provide(Server.default)
<!-- Put this in ./resources directory -->
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%cyan(%d{HH:mm:ss.SSS}) %highlight(%-5level) %gray([%thread]) %magenta(%logger{36}) - %msg%n
</pattern>
</encoder>
</appender>
<logger name="io.grpc.netty" level="WARN"/>
<logger name="ch.qos.logback" level="INFO"/>
<logger name="io.netty" level="INFO"/>
<root level="DEBUG">
<appender-ref ref="STDOUT"/>
</root>
</configuration>
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