Add Log4j API to JUL bridge

log4j-api-to-jul/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to you under the Apache License, Version 2.0
+  ~ (the "License"); you may not use this file except in compliance with
+  ~ the License.  You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<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>
+  <parent>
+    <groupId>org.apache.logging.log4j</groupId>
+    <artifactId>log4j-jdk-parent</artifactId>
+    <version>${revision}</version>
+    <relativePath>../parent</relativePath>
+  </parent>
+
+  <artifactId>log4j-api-to-jul</artifactId>
+  <packaging>jar</packaging>
+  <name>Log4j API to JUL logging bridge</name>
+  <description>The Apache Log4j binding between Log4j 2 API and java.util.logging (JUL).</description>
+
+  <inceptionYear>2022</inceptionYear>
+
+  <properties>
+    <!-- Dependency versions -->
+    <osgi.framework.version>1.8.0</osgi.framework.version>
+  </properties>
+
+  <dependencies>
+
+    <dependency>
+      <groupId>org.osgi</groupId>
+      <artifactId>org.osgi.framework</artifactId>
+      <version>${osgi.framework.version}</version>
+      <scope>provided</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.apache.logging.log4j</groupId>
+      <artifactId>log4j-api</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava-testlib</artifactId>
+      <version>33.3.1-jre</version>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+
+  </dependencies>
+</project>

log4j-api-to-jul/src/main/java/org/apache/logging/log4j/tojul/Activator.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to you under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.logging.log4j.tojul;
+
+import org.apache.logging.log4j.util.ProviderActivator;
+import org.osgi.annotation.bundle.Header;
+import org.osgi.framework.Constants;
+
+@Header(name = Constants.BUNDLE_ACTIVATOR, value = "${@class}")
+@Header(name = Constants.BUNDLE_ACTIVATIONPOLICY, value = Constants.ACTIVATION_LAZY)
+public class Activator extends ProviderActivator {
+
+    public Activator() {
+        super(new JULProvider());
+    }
+}