Fix ServiceLoader classloader issue for plugin environments

Set thread context classloader before creating ACME Session so
ServiceLoader can find providers in the plugin JAR.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: cryptobench

dependency-reduced-pom.xml

@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.easywebmap</groupId>
+  <artifactId>EasyWebMap</artifactId>
+  <name>EasyWebMap</name>
+  <version>1.0.0</version>
+  <description>Live web map viewer for Hytale servers</description>
+  <build>
+    <resources>
+      <resource>
+        <filtering>true</filtering>
+        <directory>src/main/resources</directory>
+      </resource>
+    </resources>
+    <plugins>
+      <plugin>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.11.0</version>
+        <configuration>
+          <source>25</source>
+          <target>25</target>
+        </configuration>
+      </plugin>
+      <plugin>
+        <artifactId>maven-jar-plugin</artifactId>
+        <version>3.3.0</version>
+        <configuration>
+          <archive>
+            <manifest>
+              <mainClass>com.easywebmap.EasyWebMap</mainClass>
+            </manifest>
+          </archive>
+        </configuration>
+      </plugin>
+      <plugin>
+        <artifactId>maven-shade-plugin</artifactId>
+        <version>3.6.1</version>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>shade</goal>
+            </goals>
+            <configuration>
+              <relocations>
+                <relocation>
+                  <pattern>org.bouncycastle</pattern>
+                  <shadedPattern>com.easywebmap.shaded.bouncycastle</shadedPattern>
+                </relocation>
+                <relocation>
+                  <pattern>org.jose4j</pattern>
+                  <shadedPattern>com.easywebmap.shaded.jose4j</shadedPattern>
+                </relocation>
+              </relocations>
+              <filters>
+                <filter>
+                  <artifact>*:*</artifact>
+                  <excludes>
+                    <exclude>META-INF/*.SF</exclude>
+                    <exclude>META-INF/*.DSA</exclude>
+                    <exclude>META-INF/*.RSA</exclude>
+                  </excludes>
+                </filter>
+              </filters>
+              <transformers>
+                <transformer />
+              </transformers>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+    <dependency>
+      <groupId>com.google.code.gson</groupId>
+      <artifactId>gson</artifactId>
+      <version>2.10.1</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.code.findbugs</groupId>
+      <artifactId>jsr305</artifactId>
+      <version>3.0.2</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.hypixel.hytale</groupId>
+      <artifactId>HytaleServer</artifactId>
+      <version>1.0.0</version>
+      <scope>system</scope>
+      <systemPath>${hytale.server.path}</systemPath>
+    </dependency>
+  </dependencies>
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.target>25</maven.compiler.target>
+    <hytale.server.path>${project.basedir}/lib/HytaleServer.jar</hytale.server.path>
+    <maven.compiler.source>25</maven.compiler.source>
+  </properties>
+</project>

src/main/java/com/easywebmap/ssl/AcmeManager.java

@@ -104,7 +104,16 @@ private boolean obtainCertificate() {
             KeyPair domainKeyPair = loadOrCreateKeyPair(domainKeyFile);
 
             String acmeUrl = plugin.getConfig().isProductionAcme() ? PRODUCTION_URL : STAGING_URL;
-            Session session = new Session(acmeUrl);
+
+            // Set context classloader so ServiceLoader can find ACME providers in plugin JAR
+            ClassLoader originalClassLoader = Thread.currentThread().getContextClassLoader();
+            Thread.currentThread().setContextClassLoader(AcmeManager.class.getClassLoader());
+            Session session;
+            try {
+                session = new Session(acmeUrl);
+            } finally {
+                Thread.currentThread().setContextClassLoader(originalClassLoader);
+            }
 
             Account account = findOrRegisterAccount(session, accountKeyPair);
             System.out.println("[EasyWebMap] ACME account ready");