Fix reloading of the configuration from HTTP(S)

The `HttpWatcher` didn't propagate the observed
last modification time back to the configuration.
As a result, each new configuration was already
deprecated when it started and the reconfiguration
process looped.

Closes #2937

Rewrite Jetty tests using WireMock

Closes #2813

Co-authored-by: Volkan Yazıcı <volkan@yazi.ci>

log4j-appserver/pom.xml

@@ -52,22 +52,32 @@
       org.apache.tomcat.juli;transitive=false,
       org.eclipse.jetty.util;transitive=false
     </bnd-extra-module-options>
+
+    <!-- Dependencies unique for this module -->
+    <jetty.version>9.4.56.v20240826</jetty.version>
+    <tomcat-juli.version>10.0.27</tomcat-juli.version>
   </properties>
 
   <dependencies>
+
     <dependency>
       <groupId>org.eclipse.jetty</groupId>
       <artifactId>jetty-util</artifactId>
+      <version>${jetty.version}</version>
       <scope>provided</scope>
     </dependency>
+
     <dependency>
       <groupId>org.apache.tomcat</groupId>
       <artifactId>tomcat-juli</artifactId>
+      <version>${tomcat-juli.version}</version>
       <scope>provided</scope>
     </dependency>
+
     <dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-api</artifactId>
     </dependency>
+
   </dependencies>
 </project>

log4j-core-test/src/test/java/org/apache/logging/log4j/core/config/ConfigurationSourceTest.java

@@ -16,6 +16,7 @@
  */
 package org.apache.logging.log4j.core.config;
 
+import static java.util.Objects.requireNonNull;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
@@ -32,50 +33,57 @@
 import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.util.jar.Attributes;
 import java.util.jar.JarEntry;
 import java.util.jar.JarOutputStream;
 import java.util.jar.Manifest;
+import org.apache.commons.io.IOUtils;
 import org.apache.logging.log4j.core.net.UrlConnectionFactory;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
 
 public class ConfigurationSourceTest {
-    private static final Path JAR_FILE = Paths.get("target", "test-classes", "jarfile.jar");
-    private static final Path CONFIG_FILE = Paths.get("target", "test-classes", "log4j2-console.xml");
-    private static final byte[] buffer = new byte[1024];
+    /**
+     * The path inside the jar created by {@link #prepareJarConfigURL} containing the configuration.
+     */
+    public static final String PATH_IN_JAR = "/config/console.xml";
+
+    private static final String CONFIG_FILE = "/config/ConfigurationSourceTest.xml";
+
+    @TempDir
+    private Path tempDir;
 
     @Test
-    public void testJira_LOG4J2_2770_byteArray() throws Exception {
+    void testJira_LOG4J2_2770_byteArray() throws Exception {
         final ConfigurationSource configurationSource =
                 new ConfigurationSource(new ByteArrayInputStream(new byte[] {'a', 'b'}));
         assertNotNull(configurationSource.resetInputStream());
     }
 
     /**
      * Checks if the usage of 'jar:' URLs does not increase the file descriptor
-     * count and the jar file can be deleted.
-     *
-     * @throws Exception
+     * count, and the jar file can be deleted.
      */
     @Test
-    public void testNoJarFileLeak() throws Exception {
-        final URL jarConfigURL = prepareJarConfigURL();
+    void testNoJarFileLeak() throws Exception {
+        final Path jarFile = prepareJarConfigURL(tempDir);
+        final URL jarConfigURL = new URL("jar:" + jarFile.toUri().toURL() + "!" + PATH_IN_JAR);
         final long expected = getOpenFileDescriptorCount();
         UrlConnectionFactory.createConnection(jarConfigURL).getInputStream().close();
         // This can only fail on UNIX
         assertEquals(expected, getOpenFileDescriptorCount());
         // This can only fail on Windows
         try {
-            Files.delete(JAR_FILE);
+            Files.delete(jarFile);
         } catch (IOException e) {
             fail(e);
         }
     }
 
     @Test
     public void testLoadConfigurationSourceFromJarFile() throws Exception {
-        final URL jarConfigURL = prepareJarConfigURL();
+        final Path jarFile = prepareJarConfigURL(tempDir);
+        final URL jarConfigURL = new URL("jar:" + jarFile.toUri().toURL() + "!" + PATH_IN_JAR);
         final long expectedFdCount = getOpenFileDescriptorCount();
         ConfigurationSource configSource = ConfigurationSource.fromUri(jarConfigURL.toURI());
         assertNotNull(configSource);
@@ -90,7 +98,7 @@ public void testLoadConfigurationSourceFromJarFile() throws Exception {
         assertEquals(expectedFdCount, getOpenFileDescriptorCount());
         // This can only fail on Windows
         try {
-            Files.delete(JAR_FILE);
+            Files.delete(jarFile);
         } catch (IOException e) {
             fail(e);
         }
@@ -104,22 +112,18 @@ private long getOpenFileDescriptorCount() {
         return 0L;
     }
 
-    public static URL prepareJarConfigURL() throws IOException {
-        if (!Files.exists(JAR_FILE)) {
-            final Manifest manifest = new Manifest();
-            manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");
-            try (final OutputStream os = Files.newOutputStream(JAR_FILE);
-                    final JarOutputStream jar = new JarOutputStream(os, manifest);
-                    final InputStream config = Files.newInputStream(CONFIG_FILE)) {
-                final JarEntry jarEntry = new JarEntry("config/console.xml");
-                jar.putNextEntry(jarEntry);
-                int len;
-                while ((len = config.read(buffer)) != -1) {
-                    jar.write(buffer, 0, len);
-                }
-                jar.closeEntry();
-            }
+    public static Path prepareJarConfigURL(Path dir) throws IOException {
+        Path jarFile = dir.resolve("jarFile.jar");
+        final Manifest manifest = new Manifest();
+        manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");
+        try (final OutputStream os = Files.newOutputStream(jarFile);
+                final JarOutputStream jar = new JarOutputStream(os, manifest);
+                final InputStream config =
+                        requireNonNull(ConfigurationSourceTest.class.getResourceAsStream(CONFIG_FILE))) {
+            final JarEntry jarEntry = new JarEntry("config/console.xml");
+            jar.putNextEntry(jarEntry);
+            IOUtils.copy(config, os);
         }
-        return new URL("jar:" + JAR_FILE.toUri().toURL() + "!/config/console.xml");
+        return jarFile;
     }
 }