CCM NG:

- DependencyTreeManager finished and tested
    - AuditReaderProducer for producing and AuditReader which can be injected via CDI
    - Added some of the old com.arsdigita classes to the excludes for PMD


git-svn-id: https://svn.libreccm.org/ccm/ccm_ng@3570 8810af33-2d31-482b-a856-94f89814c4df

ccm-core/pom.xml

@@ -137,6 +137,11 @@
             <scope>test</scope>
         </dependency>
         
+        <dependency>
+            <groupId>org.apache.maven</groupId>
+            <artifactId>maven-artifact</artifactId>
+        </dependency>
+        
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -399,6 +404,7 @@
                         <exclude>**/DateFormatter.java</exclude>
                         <exclude>**/DateFormatterConfig.java</exclude>
                         <exclude>**/DateTimeFormatter.java</exclude>
+                        <exclude>**/DispatcherConfig.java</exclude>
                         <exclude>**/Document.java</exclude>
                         <exclude>**/Element.java</exclude>
                         <exclude>**/EmailParameter.java</exclude>
@@ -407,13 +413,17 @@
                         <exclude>**/ExceptionUnwrapper.java</exclude>
                         <exclude>**/Exceptions.java</exclude>
                         <exclude>**/FileParameter.java</exclude>
+                        <exclude>**/FormBuilderConfig.java</exclude>
                         <exclude>**/FullDateFormatter.java</exclude>
+                        <exclude>**/GlobalizationConfig.java</exclude>
                         <exclude>**/IntegerParameter.java</exclude>
                         <exclude>**/JavaPropertyReader.java</exclude>
                         <exclude>**/JavaPropertyWriter.java</exclude>
                         <exclude>**/KernelConfig.java</exclude>
                         <exclude>**/LockableImpl.java</exclude>
+                        <exclude>**/MailConfig.java</exclude>
                         <exclude>**/MapParameter.java</exclude>
+                        <exclude>**/NotificationConfig.java</exclude>
                         <exclude>**/Parameter.java</exclude>
                         <exclude>**/ParameterError.java</exclude>
                         <exclude>**/ParameterException.java</exclude>
@@ -425,8 +435,11 @@
                         <exclude>**/SpecificClassParameter.java</exclude>
                         <exclude>**/StringParameter.java</exclude>
                         <exclude>**/TimeFormatter.java</exclude>
+                        <exclude>**/UIConfig.java</exclude>
                         <exclude>**/UncheckedWrapperException.java</exclude>
+                        <exclude>**/WorkflowConfig.java</exclude>
                         <exclude>**/XML.java</exclude>
+                        <exclude>**/XMLConfig.java</exclude>
                     </excludes>
                 </configuration>
             </plugin>

ccm-core/src/main/java/org/libreccm/auditing/CcmRevision.java

@@ -21,6 +21,8 @@ package org.libreccm.auditing;
 import org.hibernate.envers.DefaultRevisionEntity;
 import org.hibernate.envers.RevisionEntity;
 
+import java.util.Objects;
+
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.Table;
@@ -51,4 +53,31 @@ public class CcmRevision extends DefaultRevisionEntity {
         this.userName = userName;
     }
 
+    @Override
+    public int hashCode() {
+        int hash = super.hashCode();
+        
+        hash = 17 * hash + Objects.hashCode(this.userName);
+        
+        return hash;
+    }
+    
+    
+    
+    @Override
+    public boolean equals(final Object object) {
+        if(!super.equals(object)) {
+            return false;
+        }
+        
+        if (!(object instanceof CcmRevision)) {
+            return false;
+        }
+        
+        final CcmRevision other = (CcmRevision) object;
+        return userName.equals(other.getUserName());
+    }
+    
+    
+
 }

ccm-core/src/main/java/org/libreccm/jpa/AuditReaderProducer.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2015 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.jpa;
+
+import org.hibernate.envers.AuditReader;
+import org.hibernate.envers.AuditReaderFactory;
+
+import javax.enterprise.inject.Produces;
+import javax.inject.Inject;
+import javax.persistence.EntityManager;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+public class AuditReaderProducer {
+    
+    @Inject
+    private transient EntityManager entityManager;
+    
+    @Produces
+    public AuditReader auditReader() {
+        return AuditReaderFactory.get(entityManager);
+    }
+}

ccm-core/src/main/java/org/libreccm/jpa/EntityManagerProducer.java

@@ -1,8 +1,5 @@
 package org.libreccm.jpa;
 
-import org.hibernate.envers.AuditReader;
-import org.hibernate.envers.AuditReaderFactory;
-
 import javax.enterprise.context.ApplicationScoped;
 import javax.enterprise.inject.Produces;
 import javax.persistence.EntityManager;
@@ -15,12 +12,9 @@ import javax.persistence.PersistenceContext;
 @ApplicationScoped
 @SuppressWarnings("PMD.UnusedPrivateField")
 public class EntityManagerProducer {
-    
+
     @Produces
     @PersistenceContext(name = "LibreCCM")
     private EntityManager entityManager;
-    
+
-    @Produces
-    private AuditReader auditReader = AuditReaderFactory.get(entityManager);
-    
 }

ccm-core/src/main/java/org/libreccm/modules/Bar.java

@@ -1,47 +0,0 @@
-/*
- * Copyright (C) 2015 LibreCCM Foundation.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301  USA
- */
-package org.libreccm.modules;
-
-/**
- *
- * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
- */
-public class Bar implements Module {
-
-    @Override
-    public void prepare() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-
-    @Override
-    public void uninstall() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-
-    @Override
-    public void init() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-
-    @Override
-    public void shutdown() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-    
-}

ccm-core/src/main/java/org/libreccm/modules/Example.java

@@ -1,47 +0,0 @@
-/*
- * Copyright (C) 2015 LibreCCM Foundation.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301  USA
- */
-package org.libreccm.modules;
-
-/**
- *
- * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
- */
-public class Example implements Module {
-
-    @Override
-    public void prepare() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-
-    @Override
-    public void uninstall() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-
-    @Override
-    public void init() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-
-    @Override
-    public void shutdown() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-    
-}

ccm-core/src/main/java/org/libreccm/modules/Foo.java

@@ -1,54 +0,0 @@
-/*
- * Copyright (C) 2015 LibreCCM Foundation.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301  USA
- */
-package org.libreccm.modules;
-
-import org.libreccm.modules.annotations.RequiredModule;
-
-/**
- *
- * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
- */
-@org.libreccm.modules.annotations.Module(name = "org.libreccm.foo.Foo", 
-                                         version = "1.0.0-beta.1",
-        requiredModules = {
-            @RequiredModule(module = Bar.class, version = "1.0.0"),
-            @RequiredModule(module= Example.class, version = "6.6.7")})
-public class Foo implements Module {
-
-    @Override
-    public void prepare() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-
-    @Override
-    public void uninstall() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-
-    @Override
-    public void init() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-
-    @Override
-    public void shutdown() {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-    }
-
-}

ccm-core/src/main/java/org/libreccm/modules/ModuleDescriptor.java

@@ -22,7 +22,7 @@ package org.libreccm.modules;
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
-public interface Module {
+public interface ModuleDescriptor {
 
     /**
      * Called by the {@link ModuleManager} after the database tables for the

ccm-core/src/main/java/org/libreccm/modules/ModuleManager.java

@@ -30,7 +30,7 @@ import javax.inject.Inject;
 public class ModuleManager {
     
     @Inject
-    private transient Instance<Module> modules;
+    private transient Instance<ModuleDescriptor> modules;
     
     
     

ccm-core/src/main/java/org/libreccm/modules/ModuleUtil.java

@@ -18,23 +18,22 @@
  */
 package org.libreccm.modules;
 
+import org.libreccm.modules.annotations.Module;
 import org.libreccm.modules.annotations.RequiredModule;
 
 /**
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
-public class ModuleUtil {
+public final class ModuleUtil {
 
     private ModuleUtil() {
         //Nothing
     }
 
-    private static org.libreccm.modules.annotations.Module getModuleAnnotation(
+    private static Module getModuleAnnotation(
-        final Module module) {
+        final ModuleDescriptor module) {
-        final org.libreccm.modules.annotations.Module annotation = module
+        final Module annotation = module.getClass().getAnnotation(Module.class);
-            .getClass().getAnnotation(
-                org.libreccm.modules.annotations.Module.class);
 
         if (annotation == null) {
             throw new IllegalArgumentException(String.format(
@@ -47,21 +46,22 @@ public class ModuleUtil {
         }
     }
 
-    public static String getModuleName(final Module module) {
+    public static String getModuleName(final ModuleDescriptor module) {
         return getModuleAnnotation(module).name();
     }
 
-    public static String getVersion(final Module module) {
+    public static String getVersion(final ModuleDescriptor module) {
         return getModuleAnnotation(module).version();
     }
 
-    public static RequiredModule[] getRequiredModules(final Module module) {
+    public static RequiredModule[] getRequiredModules(final ModuleDescriptor module) {
         return getModuleAnnotation(module).requiredModules();
     }
 
-    public static String getModuleName(Class<? extends Module> module) {
+    public static String getModuleName(
-        final org.libreccm.modules.annotations.Module annotation = module
+        final Class<? extends ModuleDescriptor> module) {
-            .getAnnotation(org.libreccm.modules.annotations.Module.class);
+        
+        final Module annotation = module.getAnnotation(Module.class);
 
         if (annotation == null) {
             throw new IllegalArgumentException(String.format(

ccm-core/src/main/java/org/libreccm/modules/annotations/Module.java

@@ -18,7 +18,7 @@
  */
 package org.libreccm.modules.annotations;
 
-import org.jboss.as.server.moduleservice.ModuleDefinition;
+import org.libreccm.modules.ModuleDescriptor;
 
 import static java.lang.annotation.ElementType.*;
 
@@ -30,7 +30,7 @@ import javax.enterprise.util.Nonbinding;
 import javax.inject.Qualifier;
 
 /**
- * Annotate an implementation of the {@link ModuleDefinition} interface with 
+ * Annotate an implementation of the {@link ModuleDescriptor} interface with 
  * this annotation to use it as a module.
  * 
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>

ccm-core/src/main/java/org/libreccm/modules/annotations/RequiredModule.java

@@ -24,8 +24,10 @@ package org.libreccm.modules.annotations;
  */
 public @interface RequiredModule {
 
-    Class<? extends org.libreccm.modules.Module> module();
+    Class<? extends org.libreccm.modules.ModuleDescriptor> module();
 
-    String version() default "";
+    String minVersion() default "";
+    
+    String maxVersion() default "";
 
 }

ccm-core/src/main/java/org/libreccm/modules/dependencytree/DependencyTreeManager.java

@@ -20,7 +20,8 @@ package org.libreccm.modules.dependencytree;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.libreccm.modules.Module;
+import org.apache.maven.artifact.versioning.ComparableVersion;
+import org.libreccm.modules.ModuleDescriptor;
 import org.libreccm.modules.ModuleUtil;
 import org.libreccm.modules.annotations.RequiredModule;
 
@@ -32,6 +33,18 @@ import java.util.Map;
 import javax.enterprise.inject.Instance;
 
 /**
+ * This class implements topological sorting to determine the order in which the
+ * modules are loaded and initialised.
+ *
+ * The class is used by creating an instance with the parameterless constructor.
+ * To create the tree/graph call the
+ * {@link #generateTree(javax.enterprise.inject.Instance)} method. With the
+ * returned list of nodes call the the {@link #orderModules(java.util.List)}
+ * method. The list returned by {@link #orderModules(java.util.List)} contains
+ * all modules in order.
+ *
+ * More information about topological sorting:
+ * <a href="https://en.wikipedia.org/wiki/Topological_sorting">https://en.wikipedia.org/wiki/Topological_sorting</a>
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
@@ -40,23 +53,23 @@ public class DependencyTreeManager {
     private static final Logger LOGGER = LogManager.getLogger(
         DependencyTreeManager.class);
 
-    public List<TreeNode> generateTree(final Instance<Module> modules) throws
+    public List<TreeNode> generateTree(final Instance<ModuleDescriptor> modules)
-        DependencyException {
+        throws DependencyException {
 
         LOGGER.info("Starting to generate dependency tree...");
 
         final Map<String, TreeNode> nodes = new HashMap<>();
 
-        for (final Module module : modules) {
+        for (final ModuleDescriptor module : modules) {
             createTreeNode(module, nodes);
         }
 
-        for (final Module module : modules) {
+        for (final ModuleDescriptor module : modules) {
             addDependencyRelations(module, nodes);
         }
 
         final List<TreeNode> nodeList = new ArrayList<>();
-        for (Map.Entry<String, TreeNode> entry : nodes.entrySet()) {
+        for (final Map.Entry<String, TreeNode> entry : nodes.entrySet()) {
             nodeList.add(entry.getValue());
         }
 
@@ -116,7 +129,7 @@ public class DependencyTreeManager {
         }
     }
 
-    private void createTreeNode(final Module module,
+    private void createTreeNode(final ModuleDescriptor module,
                                 final Map<String, TreeNode> nodes) {
         final TreeNode node = new TreeNode(module);
 
@@ -125,7 +138,7 @@ public class DependencyTreeManager {
         nodes.put(ModuleUtil.getModuleName(module), node);
     }
 
-    private void addDependencyRelations(final Module module,
+    private void addDependencyRelations(final ModuleDescriptor module,
                                         final Map<String, TreeNode> nodes)
         throws DependencyException {
 
@@ -147,8 +160,9 @@ public class DependencyTreeManager {
         final TreeNode node = nodes.get(moduleName);
         LOGGER.info("Processing required modules for module \"{}\"...",
                     ModuleUtil.getModuleName(module));
-        for (RequiredModule requiredModule : ModuleUtil.getRequiredModules(
+        for (final RequiredModule requiredModule : ModuleUtil
-            module)) {
+            .getRequiredModules(
+                module)) {
 
             LOGGER.info("\tModule \"{}\" requires module \"{}\".",
                         ModuleUtil.getModuleName(module),
@@ -171,9 +185,84 @@ public class DependencyTreeManager {
             final TreeNode dependencyNode = nodes.get(ModuleUtil.getModuleName(
                 requiredModule.module()));
 
-            node.addDependsOn(node);
+            //Check version
+            if (!validateVersion(ModuleUtil.getVersion(dependencyNode
+                .getModule()),
+                                 requiredModule.minVersion(),
+                                 requiredModule.maxVersion())) {
+                throw new DependencyException(String.format(
+                    "The required module is avialable but in the correct "
+                        + "version. "
+                        + "Available version: \"%s\"; "
+                        + "minimal required version: \"%s\"; "
+                        + "maximum required version: \"%s\"",
+                    ModuleUtil.getVersion(dependencyNode.getModule()),
+                    requiredModule.minVersion(),
+                    requiredModule.maxVersion()));
+            }
+
+            node.addDependsOn(dependencyNode);
             dependencyNode.addDependentModule(node);
         }
     }
 
+    /**
+     * Helper method for checking if an dependency is available in the required
+     * version.
+     *
+     * @param availableVersion   The available version. Can't be {@code null} or
+     *                           empty.
+     * @param minRequiredVersion The minimal version required. Can be
+     *                           {@code null} or empty.
+     * @param maxRequiredVersion The maximum version required. Can be
+     *                           {@code null} or empty.
+     *
+     * @return {@code true} if the available version is in the required range,
+     *         {@code false} if not.
+     */
+    //The names are fine. Shorter names would be less readable. Also removing 
+    //the parentheses in the ifs would make the conditions less readable.
+    @SuppressWarnings({"PMD.LongVariable", 
+                       "PMD.UselessParentheses",
+                       "PMD.CyclomaticComplexity"}) 
+    private boolean validateVersion(final String availableVersion,
+                                    final String minRequiredVersion,
+                                    final String maxRequiredVersion) {
+        if (availableVersion == null || availableVersion.isEmpty()) {
+            throw new IllegalArgumentException("No available version specified.");
+        }
+
+        if ((minRequiredVersion == null || minRequiredVersion.isEmpty())
+                && (maxRequiredVersion == null || maxRequiredVersion.isEmpty())) {
+            return true;
+        } else if ((minRequiredVersion != null && !minRequiredVersion.isEmpty())
+                       && (maxRequiredVersion == null || maxRequiredVersion
+                           .isEmpty())) {
+            final ComparableVersion minVersion = new ComparableVersion(
+                minRequiredVersion);
+            final ComparableVersion version = new ComparableVersion(
+                availableVersion);
+
+            return minVersion.compareTo(version) <= 0;
+        } else if ((minRequiredVersion == null || minRequiredVersion.isEmpty())
+                       && (maxRequiredVersion != null && !maxRequiredVersion
+                           .isEmpty())) {
+            final ComparableVersion maxVersion = new ComparableVersion(
+                maxRequiredVersion);
+            final ComparableVersion version = new ComparableVersion(
+                availableVersion);
+
+            return version.compareTo(maxVersion) <= 0;
+        } else {
+            final ComparableVersion minVersion = new ComparableVersion(
+                minRequiredVersion);
+            final ComparableVersion maxVersion = new ComparableVersion(
+                (maxRequiredVersion));
+            final ComparableVersion version = new ComparableVersion(
+                availableVersion);
+            return minVersion.compareTo(version) <= 0 && version.compareTo(
+                maxVersion) <= 0;
+        }
+    }
+
 }

ccm-core/src/main/java/org/libreccm/modules/dependencytree/TreeNode.java

@@ -18,7 +18,7 @@
  */
 package org.libreccm.modules.dependencytree;
 
-import org.libreccm.modules.Module;
+import org.libreccm.modules.ModuleDescriptor;
 import org.libreccm.modules.ModuleUtil;
 
 import java.util.ArrayList;
@@ -27,12 +27,15 @@ import java.util.List;
 import java.util.Objects;
 
 /**
- *
+ * Represents a node in the dependency tree. 
+ * 
+ * @see DependencyTreeManager
+ * 
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
 public final class TreeNode {
     
-    private Module module;
+    private ModuleDescriptor module;
     private List<TreeNode> dependentModules;
     private List<TreeNode> dependsOn;
     
@@ -40,20 +43,20 @@ public final class TreeNode {
         super();
         
         dependentModules = new ArrayList<>();
-        dependentModules = new ArrayList<>();
+        dependsOn = new ArrayList<>();
     }
     
-    public TreeNode(final Module module) {
+    public TreeNode(final ModuleDescriptor module) {
         this();
         
         this.module = module;
     }
 
-    public Module getModule() {
+    public ModuleDescriptor getModule() {
         return module;
     }
 
-    public void setModule(final Module module) {
+    public void setModule(final ModuleDescriptor module) {
         this.module = module;
     }
 
@@ -61,15 +64,15 @@ public final class TreeNode {
         return Collections.unmodifiableList(dependentModules);
     }
 
-    protected void setDependentModules(final List<TreeNode> dependentModules) {
+    void setDependentModules(final List<TreeNode> dependentModules) {
         this.dependentModules = dependentModules;
     }
     
-    protected void addDependentModule(final TreeNode node) {
+    void addDependentModule(final TreeNode node) {
         dependentModules.add(node);
     }
     
-    protected void removeDependentModule(final TreeNode node) {
+    void removeDependentModule(final TreeNode node) {
         dependentModules.remove(node);
     }
 
@@ -77,15 +80,15 @@ public final class TreeNode {
         return Collections.unmodifiableList(dependsOn);
     }
 
-    protected void setDependsOn(final List<TreeNode> dependsOn) {
+    void setDependsOn(final List<TreeNode> dependsOn) {
         this.dependsOn = dependsOn;
     }
     
-    protected void addDependsOn(final TreeNode node) {
+    void addDependsOn(final TreeNode node) {
         dependsOn.add(node);
     }
     
-    protected void removeDependsOn(final TreeNode node) {
+    void removeDependsOn(final TreeNode node) {
         dependsOn.remove(node);
     }
     

ccm-core/src/test/java/org/libreccm/modules/dependencytree/ComparableVersionTest.java

@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2015 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.modules.dependencytree;
+
+import org.apache.maven.artifact.versioning.ComparableVersion;
+
+import static org.hamcrest.Matchers.*;
+
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.libreccm.tests.categories.UnitTest;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.Assert.*;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@Category(UnitTest.class)
+public class ComparableVersionTest {
+
+    public ComparableVersionTest() {
+    }
+
+    @BeforeClass
+    public static void setUpClass() {
+    }
+
+    @AfterClass
+    public static void tearDownClass() {
+    }
+
+    @Before
+    public void setUp() {
+    }
+
+    @After
+    public void tearDown() {
+    }
+
+    @Test
+    public void compareVersions() {
+        final ComparableVersion version001 = new ComparableVersion("0.0.1");
+        final ComparableVersion version010 = new ComparableVersion("0.1.0");
+        final ComparableVersion version015 = new ComparableVersion("0.1.5");
+        final ComparableVersion version100alpha1 = new ComparableVersion(
+            "1.0.0-alpha.1");
+        final ComparableVersion version100alpha2 = new ComparableVersion(
+            "1.0.0-alpha.2");
+        final ComparableVersion version100beta1 = new ComparableVersion(
+            "1.0.0-beta.1");
+        final ComparableVersion version100beta2 = new ComparableVersion(
+            "1.0.0-beta.2");
+        final ComparableVersion version100 = new ComparableVersion("1.0.0");
+        final ComparableVersion version100final = new ComparableVersion("1.0.0");
+        final ComparableVersion version100ga = new ComparableVersion("1.0.0-ga");
+        final ComparableVersion version157 = new ComparableVersion("1.5.7");
+        final ComparableVersion version273beta3 = new ComparableVersion(
+            "2.7.3-beta.3");
+        final ComparableVersion emptyVersion = new ComparableVersion("");
+
+        final List<ComparableVersion> versions = new ArrayList<>();
+        versions.add(version001);
+        versions.add(version157);
+        versions.add(version100alpha2);
+        versions.add(version100beta2);
+        versions.add(version100alpha1);
+        versions.add(version273beta3);
+        versions.add(version100);
+        versions.add(version010);
+        versions.add(version015);
+        versions.add(version100beta1);
+        versions.add(version100ga);
+        versions.add(version100final);
+        versions.add(emptyVersion);
+
+        Collections.sort(versions);
+
+        assertThat(versions.size(), is(13));
+
+        assertThat(versions,
+                   contains(emptyVersion,
+                            version001,
+                            version010,
+                            version015,
+                            version100alpha1,
+                            version100alpha2,
+                            version100beta1,
+                            version100beta2,
+                            version100final,
+                            version100ga,
+                            version100,
+                            version157,
+                            version273beta3));
+    }
+
+}

ccm-core/src/test/java/org/libreccm/modules/dependencytree/DependencyTreeManagerCycleTest.java

@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2015 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.modules.dependencytree;
+
+import static org.hamcrest.Matchers.*;
+
+import org.jboss.arquillian.container.test.api.Deployment;
+import org.jboss.arquillian.container.test.api.ShouldThrowException;
+import org.jboss.arquillian.junit.Arquillian;
+import org.jboss.shrinkwrap.api.ShrinkWrap;
+import org.jboss.shrinkwrap.api.asset.EmptyAsset;
+import org.jboss.shrinkwrap.api.spec.WebArchive;
+import org.jboss.shrinkwrap.resolver.api.maven.Maven;
+import org.jboss.shrinkwrap.resolver.api.maven.PomEquippedResolveStage;
+import org.junit.After;
+import org.junit.AfterClass;
+
+import static org.junit.Assert.*;
+
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.junit.runner.RunWith;
+import org.libreccm.modules.ModuleDescriptor;
+import org.libreccm.modules.annotations.Module;
+import org.libreccm.modules.dependencytree.test.cycle.TestModuleA;
+import org.libreccm.modules.dependencytree.test.cycle.TestModuleB;
+import org.libreccm.modules.dependencytree.test.cycle.TestModuleC;
+import org.libreccm.modules.dependencytree.test.cycle.TestModuleRoot;
+import org.libreccm.tests.categories.IntegrationTest;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.enterprise.inject.Instance;
+import javax.inject.Inject;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@Category(IntegrationTest.class)
+@RunWith(Arquillian.class)
+public class DependencyTreeManagerCycleTest {
+
+    @Inject
+    @Module
+    private transient Instance<ModuleDescriptor> modules;
+
+    public DependencyTreeManagerCycleTest() {
+    }
+
+    @BeforeClass
+    public static void setUpClass() {
+    }
+
+    @AfterClass
+    public static void tearDownClass() {
+    }
+
+    @Before
+    public void setUp() {
+    }
+
+    @After
+    public void tearDown() {
+    }
+
+    @Deployment
+    public static WebArchive createDeployment() {
+        final PomEquippedResolveStage pom = Maven
+            .resolver()
+            .loadPomFromFile("pom.xml");
+        final PomEquippedResolveStage dependencies = pom
+            .importCompileAndRuntimeDependencies();
+        final File[] libs = dependencies.resolve().withTransitivity().asFile();
+
+        for (File lib : libs) {
+            System.err.printf("Adding file '%s' to test archive...%n",
+                              lib.getName());
+        }
+
+        return ShrinkWrap
+            .create(WebArchive.class,
+                    "LibreCCM-org.libreccm.modules.dependencytree.DependencyTreeManager.war")
+            .addPackage(DependencyTreeManager.class.getPackage())
+            .addPackage(Module.class
+                .getPackage())
+            .addPackage(org.libreccm.tests.categories.IntegrationTest.class
+                .getPackage())
+            .addPackage(
+                org.libreccm.modules.dependencytree.test.cycle.TestModuleRoot.class
+                .getPackage())
+            .addClass(org.libreccm.modules.ModuleDescriptor.class)
+            .addClass(org.libreccm.modules.ModuleUtil.class)
+            .addAsLibraries(libs)
+            .addAsWebInfResource("test-web.xml", "web.xml")
+            .addAsWebInfResource(EmptyAsset.INSTANCE, "beans.xml");
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    public void allModulesInjected() {
+        final List<Class<ModuleDescriptor>> moduleList = new ArrayList<>();
+        for (final ModuleDescriptor module : modules) {
+            moduleList.add((Class<ModuleDescriptor>) module.getClass());
+        }
+
+        assertThat(moduleList.size(), is(4));
+        assertThat(moduleList, containsInAnyOrder(TestModuleRoot.class,
+                                                  TestModuleA.class,
+                                                  TestModuleB.class,
+                                                  TestModuleC.class));
+    }
+
+    @Test(expected = DependencyException.class)
+    @ShouldThrowException(DependencyException.class)
+    public void verifyModuleOrder() throws DependencyException {
+        final DependencyTreeManager treeManager = new DependencyTreeManager();
+
+        final List<TreeNode> tree = treeManager.generateTree(modules);
+        treeManager.orderModules(tree);
+    }
+
+}

ccm-core/src/test/java/org/libreccm/modules/dependencytree/DependencyTreeManagerTest.java

@@ -18,6 +18,11 @@
  */
 package org.libreccm.modules.dependencytree;
 
+import org.libreccm.modules.dependencytree.test.valid.TestModuleB;
+import org.libreccm.modules.dependencytree.test.valid.TestModuleC;
+import org.libreccm.modules.dependencytree.test.valid.TestModuleA;
+import org.libreccm.modules.dependencytree.test.valid.TestModuleRoot;
+
 import static org.hamcrest.Matchers.*;
 
 import org.jboss.arquillian.container.test.api.Deployment;
@@ -37,7 +42,9 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 import org.junit.runner.RunWith;
-import org.libreccm.modules.Module;
+import org.libreccm.modules.ModuleDescriptor;
+import org.libreccm.modules.ModuleUtil;
+import org.libreccm.modules.annotations.Module;
 import org.libreccm.tests.categories.IntegrationTest;
 
 import java.io.File;
@@ -56,8 +63,8 @@ import javax.inject.Inject;
 public class DependencyTreeManagerTest {
 
     @Inject
-    @org.libreccm.modules.annotations.Module
+    @Module
-    private transient Instance<Module> modules;
+    private transient Instance<ModuleDescriptor> modules;
 
     public DependencyTreeManagerTest() {
     }
@@ -96,12 +103,16 @@ public class DependencyTreeManagerTest {
             .create(WebArchive.class,
                     "LibreCCM-org.libreccm.modules.dependencytree.DependencyTreeManager.war")
             .addPackage(DependencyTreeManager.class.getPackage())
-            .addPackage(org.libreccm.modules.annotations.Module.class
+            .addPackage(Module.class
                 .getPackage())
             .addPackage(org.libreccm.tests.categories.IntegrationTest.class
                 .getPackage())
-            .addClass(org.libreccm.modules.Module.class)
+            .addPackage(
+                org.libreccm.modules.dependencytree.test.valid.TestModuleRoot.class
+                .getPackage())
+            .addClass(org.libreccm.modules.ModuleDescriptor.class)
             .addClass(org.libreccm.modules.ModuleUtil.class)
+            .addAsLibraries(libs)
             .addAsWebInfResource("test-web.xml", "web.xml")
             .addAsWebInfResource(EmptyAsset.INSTANCE, "beans.xml");
     }
@@ -109,10 +120,9 @@ public class DependencyTreeManagerTest {
     @Test
     @SuppressWarnings("unchecked")
     public void allModulesInjected() {
-
+        final List<Class<ModuleDescriptor>> moduleList = new ArrayList<>();
-        final List<Class<Module>> moduleList = new ArrayList<>();
+        for (final ModuleDescriptor module : modules) {
-        for (final Module module : modules) {
+            moduleList.add((Class<ModuleDescriptor>) module.getClass());
-            moduleList.add((Class<Module>) module.getClass());
         }
 
         assertThat(moduleList.size(), is(4));
@@ -120,7 +130,25 @@ public class DependencyTreeManagerTest {
                                                   TestModuleA.class,
                                                   TestModuleB.class,
                                                   TestModuleC.class));
+    }
 
+    @Test
+    public void verifyModuleOrder() throws DependencyException {
+        final DependencyTreeManager treeManager = new DependencyTreeManager();
+
+        final List<TreeNode> tree = treeManager.generateTree(modules);
+        final List<TreeNode> ordered = treeManager.orderModules(tree);
+
+        final List<String> modulesInOrder = new ArrayList<>();
+        for (final TreeNode node : ordered) {
+            modulesInOrder.add(ModuleUtil.getModuleName(node.getModule()));
+        }
+
+        assertThat(modulesInOrder,
+                   contains("org.libreccm.core.ccm-testmodule-root",
+                            "org.libreccm.core.ccm-testmodule-a",
+                            "org.libreccm.core.ccm-testmodule-b",
+                            "org.libreccm.core.ccm-testmodule-c"));
     }
 
 }

ccm-core/src/test/java/org/libreccm/modules/dependencytree/test/cycle/TestModuleA.java

@@ -16,9 +16,10 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.modules.dependencytree;
+package org.libreccm.modules.dependencytree.test.cycle;
 
-import org.libreccm.modules.Module;
+import org.libreccm.modules.dependencytree.test.valid.*;
+import org.libreccm.modules.ModuleDescriptor;
 import org.libreccm.modules.annotations.RequiredModule;
 
 /**
@@ -29,7 +30,7 @@ import org.libreccm.modules.annotations.RequiredModule;
     name = "org.libreccm.core.ccm-testmodule-a", version = "1.0.0",
     requiredModules = {
         @RequiredModule(module = TestModuleRoot.class)})
-public class TestModuleA implements Module {
+public class TestModuleA implements ModuleDescriptor {
 
     @Override
     public void prepare() {

ccm-core/src/test/java/org/libreccm/modules/dependencytree/test/cycle/TestModuleB.java

@@ -16,9 +16,10 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.modules.dependencytree;
+package org.libreccm.modules.dependencytree.test.cycle;
 
-import org.libreccm.modules.Module;
+import org.libreccm.modules.dependencytree.test.valid.*;
+import org.libreccm.modules.ModuleDescriptor;
 import org.libreccm.modules.annotations.RequiredModule;
 
 /**
@@ -26,10 +27,10 @@ import org.libreccm.modules.annotations.RequiredModule;
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
 @org.libreccm.modules.annotations.Module(
-    name = "org.libreccm.core.ccm-testmodule-a", version = "1.0.0",
+    name = "org.libreccm.core.ccm-testmodule-b", version = "1.0.0",
     requiredModules = {
         @RequiredModule(module = TestModuleRoot.class)})
-public class TestModuleB implements Module {
+public class TestModuleB implements ModuleDescriptor {
 
     @Override
     public void prepare() {

ccm-core/src/test/java/org/libreccm/modules/dependencytree/test/cycle/TestModuleC.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2015 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.modules.dependencytree.test.cycle;
+
+import org.libreccm.modules.dependencytree.test.valid.*;
+import org.libreccm.modules.ModuleDescriptor;
+import org.libreccm.modules.annotations.RequiredModule;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@org.libreccm.modules.annotations.Module(
+    name = "org.libreccm.core.ccm-testmodule-c", version = "1.0.0",
+    requiredModules = {
+        @RequiredModule(module = TestModuleRoot.class),
+        @RequiredModule(module = TestModuleA.class)})
+public class TestModuleC implements ModuleDescriptor {
+
+    @Override
+    public void prepare() {
+        //Nothing
+    }
+
+    @Override
+    public void uninstall() {
+        //Nothing
+    }
+
+    @Override
+    public void init() {
+        //Nothing
+    }
+
+    @Override
+    public void shutdown() {
+        //Nothing
+    }
+
+}

ccm-core/src/test/java/org/libreccm/modules/dependencytree/test/cycle/TestModuleRoot.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2015 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.modules.dependencytree.test.cycle;
+
+import org.libreccm.modules.ModuleDescriptor;
+import org.libreccm.modules.annotations.RequiredModule;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@org.libreccm.modules.annotations.Module(
+    name = "org.libreccm.core.ccm-testmodule-root",
+    version = "1.0.0",
+    requiredModules = {
+        @RequiredModule(module = TestModuleB.class)})
+public class TestModuleRoot implements ModuleDescriptor {
+
+    @Override
+    public void prepare() {
+        //Nothing
+    }
+
+    @Override
+    public void uninstall() {
+        //Nothing
+    }
+
+    @Override
+    public void init() {
+        //Nothing
+    }
+
+    @Override
+    public void shutdown() {
+        //Nothing
+    }
+
+}

ccm-core/src/test/java/org/libreccm/modules/dependencytree/test/valid/TestModuleA.java

@@ -16,9 +16,9 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.modules.dependencytree;
+package org.libreccm.modules.dependencytree.test.valid;
 
-import org.libreccm.modules.Module;
+import org.libreccm.modules.ModuleDescriptor;
 import org.libreccm.modules.annotations.RequiredModule;
 
 /**
@@ -28,9 +28,8 @@ import org.libreccm.modules.annotations.RequiredModule;
 @org.libreccm.modules.annotations.Module(
     name = "org.libreccm.core.ccm-testmodule-a", version = "1.0.0",
     requiredModules = {
-        @RequiredModule(module = TestModuleRoot.class),
+        @RequiredModule(module = TestModuleRoot.class, minVersion = "1.0.0")})
-        @RequiredModule(module = TestModuleA.class)})
+public class TestModuleA implements ModuleDescriptor {
-public class TestModuleC implements Module {
 
     @Override
     public void prepare() {

ccm-core/src/test/java/org/libreccm/modules/dependencytree/test/valid/TestModuleB.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2015 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.modules.dependencytree.test.valid;
+
+import org.libreccm.modules.ModuleDescriptor;
+import org.libreccm.modules.annotations.RequiredModule;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@org.libreccm.modules.annotations.Module(
+    name = "org.libreccm.core.ccm-testmodule-b", version = "1.0.0",
+    requiredModules = {
+        @RequiredModule(module = TestModuleRoot.class, minVersion = "1.0.0")})
+public class TestModuleB implements ModuleDescriptor {
+
+    @Override
+    public void prepare() {
+        //Nothing
+    }
+
+    @Override
+    public void uninstall() {
+        //Nothing
+    }
+
+    @Override
+    public void init() {
+        //Nothing
+    }
+
+    @Override
+    public void shutdown() {
+        //Nothing
+    }
+
+}

ccm-core/src/test/java/org/libreccm/modules/dependencytree/test/valid/TestModuleC.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2015 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.modules.dependencytree.test.valid;
+
+import org.libreccm.modules.ModuleDescriptor;
+import org.libreccm.modules.annotations.RequiredModule;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@org.libreccm.modules.annotations.Module(
+    name = "org.libreccm.core.ccm-testmodule-c", version = "1.0.0",
+    requiredModules = {
+        @RequiredModule(module = TestModuleRoot.class, minVersion = "1.0.0"),
+        @RequiredModule(module = TestModuleA.class, minVersion = "1.0.0")})
+public class TestModuleC implements ModuleDescriptor {
+
+    @Override
+    public void prepare() {
+        //Nothing
+    }
+
+    @Override
+    public void uninstall() {
+        //Nothing
+    }
+
+    @Override
+    public void init() {
+        //Nothing
+    }
+
+    @Override
+    public void shutdown() {
+        //Nothing
+    }
+
+}

ccm-core/src/test/java/org/libreccm/modules/dependencytree/test/valid/TestModuleRoot.java

@@ -16,17 +16,17 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  * MA 02110-1301  USA
  */
-package org.libreccm.modules.dependencytree;
+package org.libreccm.modules.dependencytree.test.valid;
 
-import org.libreccm.modules.Module;
+import org.libreccm.modules.ModuleDescriptor;
 
 /**
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
 @org.libreccm.modules.annotations.Module(
-    name = "org.libreccm.core.ccm-testmodule-a", version = "1.0.0")
+    name = "org.libreccm.core.ccm-testmodule-root", version = "1.0.0")
-public class TestModuleRoot implements Module {
+public class TestModuleRoot implements ModuleDescriptor {
 
     @Override
     public void prepare() {

pom.xml

@@ -369,7 +369,6 @@
                 <version>1.46</version>
             </dependency>
             
-
             <dependency>
                 <groupId>org.imgscalr</groupId>
                 <artifactId>imgscalr-lib</artifactId>
@@ -382,6 +381,12 @@
                 <version>1.8.2</version>
             </dependency>
             
+            <dependency>
+                <groupId>org.apache.maven</groupId>
+                <artifactId>maven-artifact</artifactId>
+                <version>3.3.3</version>
+            </dependency>
+            
             <dependency>
                 <groupId>oro</groupId>
                 <artifactId>oro</artifactId>