tomcat7-maven-plugin/src/main/java/org/apache/tomcat/maven/plugin/tomcat7/run/AbstractRunMojo.java [1421:1505]:
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        for ( Artifact artifact : artifacts )
        {

            // Artifact is not yet registered and it has neither test, nor a
            // provided scope, not is it optional
            if ( "war".equals( artifact.getType() ) && !artifact.isOptional() && filter.include( artifact ) )
            {
                addContextFromArtifact( container, contexts, artifact, "/" + artifact.getArtifactId(), null, false );
            }
        }

        for ( AbstractWebapp additionalWebapp : getAdditionalWebapps() )
        {
            String contextPath = additionalWebapp.getContextPath();
            if ( !contextPath.startsWith( "/" ) )
            {
                contextPath = "/" + contextPath;
            }
            addContextFromArtifact( container, contexts, getArtifact( additionalWebapp ), contextPath,
                                    additionalWebapp.getContextFile(), additionalWebapp.isAsWebapp() );
        }
        return contexts;
    }


    private void addContextFromArtifact( Tomcat container, List<Context> contexts, Artifact artifact,
                                         String contextPath, File contextXml, boolean asWebApp )
        throws MojoExecutionException, ServletException, IOException
    {
        getLog().info( "Deploy warfile: " + String.valueOf( artifact.getFile() ) + " to contextPath: " + contextPath );
        File webapps = new File( configurationDir, "webapps" );
        File artifactWarDir = new File( webapps, artifact.getArtifactId() );
        if ( !artifactWarDir.exists() )
        {
            //dont extract if exists
            artifactWarDir.mkdir();
            try
            {
                UnArchiver unArchiver = archiverManager.getUnArchiver( "zip" );
                unArchiver.setSourceFile( artifact.getFile() );
                unArchiver.setDestDirectory( artifactWarDir );

                // Extract the module
                unArchiver.extract();
            }
            catch ( NoSuchArchiverException e )
            {
                getLog().error( e );
                return;
            }
            catch ( ArchiverException e )
            {
                getLog().error( e );
                return;
            }
        }
        // TODO make that configurable ?
        //WebappLoader webappLoader = new WebappLoader( Thread.currentThread().getContextClassLoader() );
        WebappLoader webappLoader = createWebappLoader();
        Context context = null;
        if ( asWebApp )
        {
            context = container.addWebapp( contextPath, artifactWarDir.getAbsolutePath() );
        }
        else
        {
            context = container.addContext( contextPath, artifactWarDir.getAbsolutePath() );
        }
        context.setLoader( webappLoader );

        File contextFile = contextXml != null ? contextXml : getContextFile();
        if ( contextFile != null )
        {
            context.setConfigFile( contextFile.toURI().toURL() );
        }

        contexts.add( context );
//        container.getHost().addChild(context);
    }

    private void createStaticContext( final Tomcat container, Context context, Host host )
    {
        if ( staticContextDocbase != null )
        {
            Context staticContext = container.addContext( staticContextPath, staticContextDocbase );
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tomcat8-maven-plugin/src/main/java/org/apache/tomcat/maven/plugin/tomcat8/run/AbstractRunMojo.java [1492:1576]:
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        for ( Artifact artifact : artifacts )
        {

            // Artifact is not yet registered and it has neither test, nor a
            // provided scope, not is it optional
            if ( "war".equals( artifact.getType() ) && !artifact.isOptional() && filter.include( artifact ) )
            {
                addContextFromArtifact( container, contexts, artifact, "/" + artifact.getArtifactId(), null, false );
            }
        }

        for ( AbstractWebapp additionalWebapp : getAdditionalWebapps() )
        {
            String contextPath = additionalWebapp.getContextPath();
            if ( !contextPath.startsWith( "/" ) )
            {
                contextPath = "/" + contextPath;
            }
            addContextFromArtifact( container, contexts, getArtifact( additionalWebapp ), contextPath,
                                    additionalWebapp.getContextFile(), additionalWebapp.isAsWebapp() );
        }
        return contexts;
    }


    private void addContextFromArtifact( Tomcat container, List<Context> contexts, Artifact artifact,
                                         String contextPath, File contextXml, boolean asWebApp )
        throws MojoExecutionException, ServletException, IOException
    {
        getLog().info( "Deploy warfile: " + String.valueOf( artifact.getFile() ) + " to contextPath: " + contextPath );
        File webapps = new File( configurationDir, "webapps" );
        File artifactWarDir = new File( webapps, artifact.getArtifactId() );
        if ( !artifactWarDir.exists() )
        {
            //dont extract if exists
            artifactWarDir.mkdir();
            try
            {
                UnArchiver unArchiver = archiverManager.getUnArchiver( "zip" );
                unArchiver.setSourceFile( artifact.getFile() );
                unArchiver.setDestDirectory( artifactWarDir );

                // Extract the module
                unArchiver.extract();
            }
            catch ( NoSuchArchiverException e )
            {
                getLog().error( e );
                return;
            }
            catch ( ArchiverException e )
            {
                getLog().error( e );
                return;
            }
        }
        // TODO make that configurable ?
        //WebappLoader webappLoader = new WebappLoader( Thread.currentThread().getContextClassLoader() );
        WebappLoader webappLoader = createWebappLoader();
        Context context = null;
        if ( asWebApp )
        {
            context = container.addWebapp( contextPath, artifactWarDir.getAbsolutePath() );
        }
        else
        {
            context = container.addContext( contextPath, artifactWarDir.getAbsolutePath() );
        }
        context.setLoader( webappLoader );

        File contextFile = contextXml != null ? contextXml : getContextFile();
        if ( contextFile != null )
        {
            context.setConfigFile( contextFile.toURI().toURL() );
        }

        contexts.add( context );
//        container.getHost().addChild(context);
    }

    private void createStaticContext( final Tomcat container, Context context, Host host )
    {
        if ( staticContextDocbase != null )
        {
            Context staticContext = container.addContext( staticContextPath, staticContextDocbase );
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