Migrate commons.logging and log4j-1 loggers to SLF4J

NOTICE.md

@@ -61,10 +61,6 @@ Apache Commons Line Interface (1.0)
 
 * License: Apache Software License 1.1
 
-Apache Commons Logging Jar (1.1.1)
-
-* License: Apache License, 2.0
-
 asm (6.2)
 
 * License: BSD-3-Clause
@@ -113,17 +109,13 @@ Guice (2.0)
 
 * License: Apache License, 2.0
 
-log4j (1.2.15)
-
-* License: Apache License, 2.0
-
 org.apache.ant (1.6.5)
 
 * License: Apache License, 2.0
 
-Apache Commons Logging (1.3.3)
+Simple Logging Facade for Java (SLF4J) (2.0.15)
 
-* License: Apache License, 2.0
+* License: MIT License
 
 ## Cryptography
 

features/org.eclipse.emf.mwe2.launcher-feature/feature.xml

@@ -40,7 +40,6 @@ SPDX-License-Identifier: EPL-2.0
       <import plugin="org.eclipse.core.runtime"/>
       <import plugin="org.eclipse.osgi"/>
       <import plugin="org.apache.commons.cli" version="1.8.0" match="compatible"/>
-      <import plugin="org.apache.log4j"/>
    </requires>
 
    <plugin

maven/org.eclipse.emf.mwe2.parent/pom.xml

@@ -22,7 +22,7 @@
 
 	<properties>
 		<tycho-qualifier>yyyyMMdd-HHmm</tycho-qualifier>
-		
+
 		<tycho-version>2.7.5</tycho-version>
 		<maven.compiler.source>11</maven.compiler.source>
 		<maven.compiler.target>11</maven.compiler.target>
@@ -32,8 +32,6 @@
 		<commons-cli.version>1.8.0</commons-cli.version>
 		<guava.version>33.2.1-jre</guava.version>
 		<google-inject.version>7.0.0</google-inject.version>
-		<log4j.version>1.2.25</log4j.version>
-		<commons-logging.version>1.3.3</commons-logging.version>
 		<cbi-plugins.version>1.3.5</cbi-plugins.version>
 
 		<project.build.sourceEncoding>ISO-8859-1</project.build.sourceEncoding>
@@ -63,7 +61,7 @@
 			<url>http://www.eclipse.org/legal/epl-2.0</url>
 		</license>
 	</licenses>
-	
+
 	<pluginRepositories>
 		<!-- for eclipse-jarsigner-plugin -->
 		<pluginRepository>
@@ -77,7 +75,7 @@
 			</snapshots>
 		</pluginRepository>
 	</pluginRepositories>
-	
+
 	<build>
 		<sourceDirectory>src</sourceDirectory>
 		<plugins>
@@ -211,7 +209,7 @@
 								<name>model</name>
 								<placement>X</placement>
 							</tag>
-						</tags>	
+						</tags>
 					</configuration>
 				</plugin>
 				<plugin>
@@ -304,7 +302,7 @@
 				<module>../org.eclipse.emf.mwe2.target/org.eclipse.emf.mwe2.target.nightly</module>
 			</modules>
 		</profile>
-		<!-- 
+		<!--
 			Profile 'release' is activated when property BUILD_TYPE is NOT 'N' (nightly).
 			For release builds strict version checking is disabled, since Maven version will be a
 			release version, while OSGi artifacts (MANIFEST.MF, feature.xml) still contain a qualified version.

maven/org.eclipse.emf.mwe2.repository/category.xml

@@ -12,8 +12,6 @@
    <bundle id="com.google.guava.failureaccess.source" version="1.0.2.qualifier"/>
    <bundle id="org.apache.commons.cli" version="1.8.0"/>
    <bundle id="org.apache.commons.cli.source" version="1.8.0"/>
-   <bundle id="org.apache.commons.commons-logging" version="0.0.0"/>
-   <bundle id="org.apache.commons.commons-logging.source" version="0.0.0"/>
    <category-def name="mwe2lang" label="MWE">
       <description>
          The configuration language used to configure Xtext&apos;s code generator.

maven/org.eclipse.emf.mwe2.target/org.eclipse.emf.mwe2.target.nightly/org.eclipse.emf.mwe2.target.nightly.target

@@ -24,12 +24,11 @@
 <repository location="https://download.eclipse.org/cbi/updates/license/"/>
 </location>
 <location includeAllPlatforms="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-<unit id="org.apache.log4j" version="1.2.25"/>
 <unit id="org.junit" version="0.0.0"/>
 <unit id="org.apache.commons.cli" version="1.8.0"/>
-<unit id="org.apache.commons.commons-logging" version="0.0.0"/>
 <unit id="com.google.guava" version="33.2.1.jre"/>
 <unit id="com.google.guava.failureaccess" version="1.0.2"/>
+<unit id="slf4j.api" version="2.0.13"/>
 <repository location="https://download.eclipse.org/tools/orbit/simrel/orbit-aggregation/2024-09"/>
 </location>
 </locations>

maven/org.eclipse.emf.mwe2.target/org.eclipse.emf.mwe2.target/org.eclipse.emf.mwe2.target.target

@@ -25,12 +25,11 @@
 <repository location="https://download.eclipse.org/cbi/updates/license/"/>
 </location>
 <location includeAllPlatforms="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-<unit id="org.apache.log4j" version="1.2.25"/>
 <unit id="org.junit" version="0.0.0"/>
 <unit id="org.apache.commons.cli" version="1.8.0"/>
-<unit id="org.apache.commons.commons-logging" version="0.0.0"/>
 <unit id="com.google.guava" version="33.2.1.jre"/>
 <unit id="com.google.guava.failureaccess" version="1.0.2"/>
+<unit id="slf4j.api" version="2.0.13"/>
 <repository location="https://download.eclipse.org/tools/orbit/simrel/orbit-aggregation/2024-09"/>
 </location>
 </locations>

plugins/org.eclipse.emf.mwe.core/META-INF/MANIFEST.MF

@@ -39,5 +39,5 @@ Export-Package: org.eclipse.emf.mwe.core,
  org.eclipse.emf.mwe.internal.core.util;x-friends:="org.eclipse.emf.mwe.tests"
 Bundle-Activator: org.eclipse.emf.mwe.internal.core.MWEPlugin$Implementation
 Bundle-ActivationPolicy: lazy
-Import-Package: org.apache.commons.logging;version="1.0.4"
+Import-Package: org.slf4j;version="[1.7.0,3.0.0)"
 Automatic-Module-Name: org.eclipse.emf.mwe.core

plugins/org.eclipse.emf.mwe.core/pom.xml

@@ -26,10 +26,5 @@
 			<artifactId>commons-cli</artifactId>
 			<version>${commons-cli.version}</version>
 		</dependency>
-		<dependency>
-			<groupId>commons-logging</groupId>
-			<artifactId>commons-logging</artifactId>
-			<version>${commons-logging.version}</version>
-		</dependency>
 	</dependencies>
 </project>

plugins/org.eclipse.emf.mwe.core/src/org/eclipse/emf/mwe/core/WorkflowEngine.java

@@ -15,8 +15,6 @@
 import java.util.Map;
 import java.util.jar.Manifest;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.eclipse.emf.common.util.Diagnostic;
 import org.eclipse.emf.mwe.core.issues.Issues;
 import org.eclipse.emf.mwe.core.issues.IssuesImpl;
@@ -26,6 +24,8 @@
 import org.eclipse.emf.mwe.internal.core.Workflow;
 import org.eclipse.emf.mwe.internal.core.ast.util.WorkflowFactory;
 import org.eclipse.emf.mwe.internal.core.ast.util.converter.Converter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 
 public class WorkflowEngine {
@@ -34,7 +34,7 @@ public class WorkflowEngine {
 
 	private ProgressMonitor monitor;
 
-	private static final Log logger = LogFactory.getLog(WorkflowEngine.class);
+	private static final Logger logger = LoggerFactory.getLogger(WorkflowEngine.class);
 
 	private Map<String, String> params;
 
@@ -113,7 +113,7 @@ public boolean prepare(final String workFlowFile, final ProgressMonitor theMonit
 			}
 		}
 		catch (final ConfigurationException ex) {
-			logger.fatal(ex.getMessage(), ex);
+			logger.error(ex.getMessage(), ex);
 			logIssues(logger, issues);
 			return false;
 		}
@@ -205,7 +205,7 @@ private void addExternalSlotContents(final Map<?, ?> slotContents) {
 		}
 	}
 
-	private void logIssues(final Log logger, final Issues issues) {
+	private void logIssues(final Logger logger, final Issues issues) {
 		// log any configuration warning messages
 		final Diagnostic[] issueArray = issues.getIssues();
 		for (final Diagnostic issue : issueArray) {

plugins/org.eclipse.emf.mwe.core/src/org/eclipse/emf/mwe/core/container/CompositeComponent.java

@@ -16,8 +16,6 @@
 import java.util.Collection;
 import java.util.List;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.eclipse.emf.mwe.core.ConfigurationException;
 import org.eclipse.emf.mwe.core.WorkflowComponent;
 import org.eclipse.emf.mwe.core.WorkflowComponentWithID;
@@ -32,6 +30,8 @@
 import org.eclipse.emf.mwe.internal.core.util.ComponentPrinter;
 import org.eclipse.emf.mwe2.runtime.workflow.IWorkflowComponent;
 import org.eclipse.emf.mwe2.runtime.workflow.IWorkflowContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * A composite <tt>WorkflowComponent</tt>.
@@ -41,7 +41,7 @@ public class CompositeComponent implements WorkflowComponentWithID, IWorkflowCom
 
 	private static final String COMPONENT_NAME = "Composite component";
 
-	protected static final Log log = LogFactory.getLog(CompositeComponent.class);
+	protected static final Logger log = LoggerFactory.getLogger(CompositeComponent.class);
 
 	private final String name;
 

plugins/org.eclipse.emf.mwe.core/src/org/eclipse/emf/mwe/core/customizer/WorkflowCustomization.java

@@ -14,14 +14,14 @@
 import java.util.HashMap;
 import java.util.Map;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class WorkflowCustomization {
 
 	private static Map<String,Class<?>> keywordmapping = new HashMap<String,Class<?>>();
 
-	private static final Log logger = LogFactory.getLog(WorkflowCustomization.class);
+	private static final Logger logger = LoggerFactory.getLogger(WorkflowCustomization.class);
 
 	public static void registerKeywordMapping( String keyword, Class<?> componentClass ) {
 		keywordmapping .put( keyword, componentClass );

plugins/org.eclipse.emf.mwe.core/src/org/eclipse/emf/mwe/core/lib/AbstractWorkflowComponent.java

@@ -11,8 +11,6 @@
  *******************************************************************************/
 package org.eclipse.emf.mwe.core.lib;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.eclipse.emf.mwe.core.WorkflowComponentWithID;
 import org.eclipse.emf.mwe.core.WorkflowContext;
 import org.eclipse.emf.mwe.core.container.CompositeComponent;
@@ -21,14 +19,16 @@
 import org.eclipse.emf.mwe.internal.core.ast.parser.Location;
 import org.eclipse.emf.mwe2.runtime.workflow.IWorkflowComponent;
 import org.eclipse.emf.mwe2.runtime.workflow.IWorkflowContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Base class useful for implementing custom WorkflowComponents.
  * 
  */
 public abstract class AbstractWorkflowComponent implements WorkflowComponentWithID, IWorkflowComponent {
 
-	private static final Log log = LogFactory.getLog(AbstractWorkflowComponent.class);
+	private static final Logger log = LoggerFactory.getLogger(AbstractWorkflowComponent.class);
 
 	/** The component's id */
 	private String componentID;

plugins/org.eclipse.emf.mwe.core/src/org/eclipse/emf/mwe/core/lib/Mwe2Bridge.java

@@ -8,22 +8,22 @@
  *******************************************************************************/
 package org.eclipse.emf.mwe.core.lib;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.eclipse.emf.mwe.core.WorkflowComponentWithID;
 import org.eclipse.emf.mwe.core.WorkflowContext;
 import org.eclipse.emf.mwe.core.issues.IssuesImpl;
 import org.eclipse.emf.mwe.core.issues.MWEDiagnostic;
 import org.eclipse.emf.mwe.core.monitor.NullProgressMonitor;
 import org.eclipse.emf.mwe2.runtime.workflow.IWorkflowContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * @author Sebastian Zarnekow - Initial contribution and API
  */
 public class Mwe2Bridge {
 
-	private static final Log log = LogFactory.getLog(Mwe2Bridge.class); 
-	
+	private static final Logger log = LoggerFactory.getLogger(Mwe2Bridge.class);
+
 	private final WorkflowComponentWithID delegate;
 
 	public Mwe2Bridge(WorkflowComponentWithID delegate) {

plugins/org.eclipse.emf.mwe.core/src/org/eclipse/emf/mwe/internal/core/ast/DeclaredPropertyFileAST.java

@@ -19,14 +19,14 @@
 import java.util.List;
 import java.util.Properties;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.eclipse.emf.mwe.core.resources.ResourceLoader;
 import org.eclipse.emf.mwe.internal.core.ast.parser.Location;
 import org.eclipse.emf.mwe.internal.core.ast.parser.WorkflowParser;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class DeclaredPropertyFileAST extends AbstractASTBase {
-	private final Log log = LogFactory.getLog(getClass());
+	private static final Logger log = LoggerFactory.getLogger(DeclaredPropertyFileAST.class);
 
 	private String file;
 

plugins/org.eclipse.emf.mwe.core/src/org/eclipse/emf/mwe/internal/core/ast/parser/WorkflowParser.java

@@ -20,8 +20,6 @@
 import javax.xml.parsers.SAXParser;
 import javax.xml.parsers.SAXParserFactory;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.eclipse.emf.mwe.core.issues.Issues;
 import org.eclipse.emf.mwe.internal.core.ast.AbstractASTBase;
 import org.eclipse.emf.mwe.internal.core.ast.ComponentAST;
@@ -30,12 +28,14 @@
 import org.eclipse.emf.mwe.internal.core.ast.InclusionAST;
 import org.eclipse.emf.mwe.internal.core.ast.ReferenceAST;
 import org.eclipse.emf.mwe.internal.core.ast.SimpleParamAST;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.xml.sax.Attributes;
 import org.xml.sax.Locator;
 import org.xml.sax.helpers.DefaultHandler;
 
 public class WorkflowParser extends DefaultHandler {
-	private static final Log log = LogFactory.getLog(WorkflowParser.class);
+	private static final Logger log = LoggerFactory.getLogger(WorkflowParser.class);
 
 	// reserved element names
 	public final static String PROPERTY = "property";

plugins/org.eclipse.emf.mwe.core/src/org/eclipse/emf/mwe/internal/core/ast/util/VisitorBase.java

@@ -11,8 +11,6 @@
  *******************************************************************************/
 package org.eclipse.emf.mwe.internal.core.ast.util;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.eclipse.emf.mwe.core.resources.ResourceLoader;
 import org.eclipse.emf.mwe.core.resources.ResourceLoaderFactory;
 import org.eclipse.emf.mwe.internal.core.ast.AbstractASTBase;
@@ -22,10 +20,12 @@
 import org.eclipse.emf.mwe.internal.core.ast.InclusionAST;
 import org.eclipse.emf.mwe.internal.core.ast.ReferenceAST;
 import org.eclipse.emf.mwe.internal.core.ast.SimpleParamAST;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public abstract class VisitorBase {
 
-	protected Log log = LogFactory.getLog(getClass());
+	protected Logger log = LoggerFactory.getLogger(getClass());
 
 	protected ResourceLoader loader = ResourceLoaderFactory.createResourceLoader();
 

plugins/org.eclipse.emf.mwe.core/src/org/eclipse/emf/mwe/internal/core/debug/communication/PackageReceiver.java

@@ -15,9 +15,9 @@
 import java.io.InterruptedIOException;
 import java.util.ArrayList;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.eclipse.emf.mwe.internal.core.debug.communication.packages.AbstractPackage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * This Runnable listens for incoming packages asynchroniously and keeps them, until they are required by
@@ -26,7 +26,7 @@
 public class PackageReceiver implements Runnable {
 	private final ArrayList<AbstractPackage> receivedPackages;
 
-	private static final Log logger = LogFactory.getLog(PackageReceiver.class);
+	private static final Logger logger = LoggerFactory.getLogger(PackageReceiver.class);
 
 	private final Connection connection;
 

plugins/org.eclipse.emf.mwe.core/src/org/eclipse/emf/mwe/internal/core/debug/communication/PackageSender.java

@@ -15,9 +15,9 @@
 import java.io.InterruptedIOException;
 import java.util.ArrayList;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.eclipse.emf.mwe.internal.core.debug.communication.packages.AbstractPackage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * This Runnable sends packages out asynchroniously as they arrive from customers.
@@ -26,7 +26,7 @@ public class PackageSender implements Runnable {
 
 	private final ArrayList<AbstractPackage> outgoingPackages;
 
-	private static final Log logger = LogFactory.getLog(PackageSender.class);
+	private static final Logger logger = LoggerFactory.getLogger(PackageSender.class);
 
 	private final Connection connection;