Merge pull request #224 from sladkoff/build/kotlin

build: configure Kotlin support

Author: sladkoff

pom.xml

@@ -24,6 +24,7 @@
 
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <kotlin.version>1.9.22</kotlin.version>
     </properties>
 
     <repositories>
@@ -91,19 +92,22 @@
             <version>5.4.0</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <artifactId>kotlin-stdlib-jdk8</artifactId>
+            <version>${kotlin.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <artifactId>kotlin-test</artifactId>
+            <version>${kotlin.version}</version>
+            <scope>test</scope>
+        </dependency>
 
     </dependencies>
 
     <build>
         <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-                <configuration>
-                    <release>17</release>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
@@ -147,6 +151,76 @@
                     </gitFlowConfig>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.jetbrains.kotlin</groupId>
+                <artifactId>kotlin-maven-plugin</artifactId>
+                <version>${kotlin.version}</version>
+                <executions>
+                    <execution>
+                        <id>compile</id>
+                        <phase>compile</phase>
+                        <goals>
+                            <goal>compile</goal>
+                        </goals>
+                        <configuration>
+                            <sourceDirs>
+                                <sourceDir>${project.basedir}/src/main/kotlin</sourceDir>
+                                <sourceDir>${project.basedir}/src/main/java</sourceDir>
+                                <source>target/generated-sources/annotations</source>
+                            </sourceDirs>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>test-compile</id>
+                        <phase>test-compile</phase>
+                        <goals>
+                            <goal>test-compile</goal>
+                        </goals>
+                        <configuration>
+                            <sourceDirs>
+                                <sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
+                                <sourceDir>${project.basedir}/src/test/java</sourceDir>
+                                <source>target/generated-test-sources/test-annotations</source>
+                            </sourceDirs>
+                        </configuration>
+                    </execution>
+                </executions>
+                <configuration>
+                    <jvmTarget>1.8</jvmTarget>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <id>default-compile</id>
+                        <phase>none</phase>
+                    </execution>
+                    <execution>
+                        <id>default-testCompile</id>
+                        <phase>none</phase>
+                    </execution>
+                    <execution>
+                        <id>compile</id>
+                        <phase>compile</phase>
+                        <goals>
+                            <goal>compile</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>testCompile</id>
+                        <phase>test-compile</phase>
+                        <goals>
+                            <goal>testCompile</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <release>17</release>
+                </configuration>
+            </plugin>
 
         </plugins>
     </build>

src/main/java/de/sldk/mc/PrometheusExporter.java

@@ -0,0 +1,44 @@
+@file:JvmName("PrometheusExporter")
+
+package de.sldk.mc
+
+import de.sldk.mc.config.PrometheusExporterConfig
+import org.bukkit.plugin.java.JavaPlugin
+import java.util.logging.Level
+
+class PrometheusExporter : JavaPlugin() {
+    private val config: PrometheusExporterConfig = PrometheusExporterConfig(this)
+    private var server: MetricsServer? = null
+
+    @Override
+    override fun onEnable() {
+        config.loadDefaultsAndSave()
+        config.enableConfiguredMetrics()
+        startMetricsServer()
+    }
+
+    private fun startMetricsServer() {
+        val host = config[PrometheusExporterConfig.HOST]
+        val port = config[PrometheusExporterConfig.PORT]
+
+        server = MetricsServer(host, port, this)
+
+        try {
+            server?.start()
+            getLogger().info("Started Prometheus metrics endpoint at: $host:$port")
+        } catch (e: Exception) {
+            getLogger().severe("Could not start embedded Jetty server: " + e.message)
+            getServer().getPluginManager().disablePlugin(this)
+        }
+    }
+
+    @Override
+    override fun onDisable() {
+        try {
+            server?.stop()
+        } catch (e: Exception) {
+            getLogger().log(Level.WARNING, "Failed to stop metrics server gracefully: " + e.message)
+            getLogger().log(Level.FINE, "Failed to stop metrics server gracefully", e)
+        }
+    }
+}