Update from Logj 1 to the Log4j 2 API compatibility layer (#231)

* Update from Logj1 to the 2 API compatibility layer

* Update from Logj1 to the 2 API compatibility layer

pom.xml

@@ -32,7 +32,7 @@ under the License.
   <groupId>commons-logging</groupId>
   <artifactId>commons-logging</artifactId>
   <name>Apache Commons Logging</name>
-  <version>1.3.1-SNAPSHOT</version>
+  <version>1.4.0-SNAPSHOT</version>
   <description>Apache Commons Logging is a thin adapter allowing configurable bridging to other,
     well-known logging systems.</description>
   <url>https://commons.apache.org/proper/commons-logging/</url>
@@ -237,6 +237,7 @@ under the License.
                 <exclude>org.slf4j:*</exclude>
               </classpathDependencyExcludes>
               <excludes>
+                <exclude>org/apache/commons/logging/log4j/log4j12/**</exclude>
                 <exclude>org/apache/commons/logging/log4j2/**</exclude>
                 <exclude>org/apache/commons/logging/slf4j/**</exclude>
                 <exclude>org/apache/commons/logging/serviceloader/**</exclude>
@@ -248,7 +249,7 @@ under the License.
                 <!--
                   <org.apache.commons.logging.diagnostics.dest>STDOUT</org.apache.commons.logging.diagnostics.dest>
                 -->
-                  <log4j12>${log4j:log4j:jar}</log4j12>
+                <log4j12>${org.apache.logging.log4j:log4j-1.2-api:jar}</log4j12>
                 <logkit>${logkit:logkit:jar}</logkit>
                 <servlet-api>${javax.servlet:servlet-api:jar}</servlet-api>
                 <commons-logging>target/${project.build.finalName}.jar</commons-logging>
@@ -277,7 +278,7 @@ under the License.
             </configuration>
           </execution>
           <!--
-            - Tests logging through the Log4j API.
+            - Tests logging through the Log4j 2 API.
             -->
           <execution>
             <id>log4j-test</id>
@@ -305,6 +306,53 @@ under the License.
               </systemPropertyVariables>
             </configuration>
           </execution>
+          <!--
+            - Tests logging through the Log4j 2 API for 1.2.
+            -->
+          <execution>
+            <id>log4j12-test</id>
+            <goals>
+              <goal>integration-test</goal>
+            </goals>
+            <configuration>
+              <additionalClasspathDependencies>
+                <dependency>
+                  <groupId>org.apache.logging.log4j</groupId>
+                  <artifactId>log4j-1.2-api</artifactId>
+                  <version>${log4j2.version}</version>
+                </dependency>
+                <dependency>
+                  <groupId>org.apache.logging.log4j</groupId>
+                  <artifactId>log4j-api</artifactId>
+                  <version>${log4j2.version}</version>
+                </dependency>
+                <dependency>
+                  <groupId>org.apache.logging.log4j</groupId>
+                  <artifactId>log4j-core</artifactId>
+                  <version>${log4j2.version}</version>
+                </dependency>
+              </additionalClasspathDependencies>
+              <includes>
+                <include>org/apache/commons/logging/log4j/log4j12/*TestCase.java</include>
+              </includes>
+              <systemPropertyVariables>
+                <!-- Due to a bug in `log4j-core-test`,
+                   ~ the default LogEventFactory loses the location info.
+                   ~ We need to force the usage of the reusable version.
+                <log4j2.messageFactory>org.apache.logging.log4j.message.ParameterizedMessageFactory</log4j2.messageFactory>
+                   -->
+                <log4j2.logEventFactory>org.apache.logging.log4j.core.impl.ReusableLogEventFactory</log4j2.logEventFactory>
+                <log4j12>${org.apache.logging.log4j:log4j-1.2-api:jar}</log4j12>
+                <log4j2-api>${org.apache.logging.log4j:log4j-api:jar}</log4j2-api>
+                <log4j2-core>${org.apache.logging.log4j:log4j-core:jar}</log4j2-core>
+                <commons-logging>target/${project.build.finalName}.jar</commons-logging>
+                <commons-logging-api>target/${project.build.finalName}-api.jar</commons-logging-api>
+                <testclasses>target/${project.build.finalName}-tests.jar</testclasses>
+                <!-- Use the Log4j 1.2 version of Log -->
+                <org.apache.commons.logging.LogFactory>org.apache.commons.logging.impl.LogFactoryImpl</org.apache.commons.logging.LogFactory>
+              </systemPropertyVariables>
+            </configuration>
+          </execution>
           <!--
             - Tests falling back to the SLF4J API, when the Log4j API is absent.
           -->
@@ -477,9 +525,9 @@ under the License.
       <optional>true</optional>
     </dependency>
     <dependency>
-      <groupId>log4j</groupId>
-      <artifactId>log4j</artifactId>
-      <version>1.2.17</version>
+      <groupId>org.apache.logging.log4j</groupId>
+      <artifactId>log4j-1.2-api</artifactId>
+      <version>${log4j2.version}</version>
       <optional>true</optional>
     </dependency>
     <dependency>
@@ -603,9 +651,9 @@ under the License.
     <maven.compiler.target>${commons.logging.javaversion}</maven.compiler.target>
     <commons.componentid>logging</commons.componentid>
     <commons.module.name>org.apache.commons.logging</commons.module.name>
-    <commons.release.version>1.3.0</commons.release.version>
-    <commons.release.next>1.3.1</commons.release.next>
-    <commons.bc.version>1.2</commons.bc.version>
+    <commons.release.version>1.4.0</commons.release.version>
+    <commons.release.next>1.4.1</commons.release.next>
+    <commons.bc.version>1.3.0</commons.bc.version>
     <commons.release.isDistModule>true</commons.release.isDistModule>
     <commons.jira.id>LOGGING</commons.jira.id>
     <commons.jira.pid>12310484</commons.jira.pid>

src/test/java/org/apache/commons/logging/log4j/StandardTests.java

@@ -147,9 +147,7 @@ public abstract class StandardTests extends TestCase {
     public void testCreateFactory() {
         final LogFactory factory = LogFactory.getFactory();
         assertNotNull("LogFactory exists", factory);
-        assertEquals("LogFactory class",
-                     "org.apache.commons.logging.impl.LogFactoryImpl",
-                     factory.getClass().getName());
+        assertEquals("LogFactory class", "org.apache.commons.logging.impl.LogFactoryImpl", factory.getClass().getName());
 
         final String[] names = factory.getAttributeNames();
         assertNotNull("Names exists", names);

src/test/java/org/apache/commons/logging/log4j/log4j12/ApiClasspathStandardTestCase.java

@@ -45,6 +45,8 @@ public class ApiClasspathStandardTestCase extends TestCase {
 
         final PathableClassLoader child = new PathableClassLoader(parent);
         child.addLogicalLib("log4j12");
+        child.addLogicalLib("log4j2-api");
+        child.addLogicalLib("log4j2-core");
         child.addLogicalLib("commons-logging");
         child.addLogicalLib("testclasses");
 

src/test/java/org/apache/commons/logging/log4j/log4j12/AppClasspathStandardTestCase.java

@@ -42,6 +42,8 @@ public class AppClasspathStandardTestCase extends TestCase {
         loader.useExplicitLoader("junit.", Test.class.getClassLoader());
         loader.addLogicalLib("testclasses");
         loader.addLogicalLib("log4j12");
+        loader.addLogicalLib("log4j2-api");
+        loader.addLogicalLib("log4j2-core");
         loader.addLogicalLib("commons-logging");
 
         final Class testClass = loader.loadClass(

src/test/java/org/apache/commons/logging/log4j/log4j12/ChildClasspathStandardTestCase.java

@@ -44,6 +44,8 @@ public class ChildClasspathStandardTestCase extends TestCase {
         final PathableClassLoader child = new PathableClassLoader(parent);
         child.addLogicalLib("testclasses");
         child.addLogicalLib("log4j12");
+        child.addLogicalLib("log4j2-api");
+        child.addLogicalLib("log4j2-core");
         child.addLogicalLib("commons-logging");
 
         final Class testClass = child.loadClass(

src/test/java/org/apache/commons/logging/log4j/log4j12/ParentClasspathStandardTestCase.java

@@ -42,6 +42,8 @@ public class ParentClasspathStandardTestCase extends TestCase {
         parent.useExplicitLoader("junit.", Test.class.getClassLoader());
         parent.addLogicalLib("commons-logging");
         parent.addLogicalLib("log4j12");
+        parent.addLogicalLib("log4j2-api");
+        parent.addLogicalLib("log4j2-core");
 
         final PathableClassLoader child = new PathableClassLoader(parent);
         child.addLogicalLib("testclasses");