Examples of org.apache.catalina.loader.WebappLoader

org.apache.catalina.loader.WebappLoader
Classloader implementation which is specialized for handling web applications in the most efficient way, while being Catalina aware (all accesses to resources are made through {@link org.apache.catalina.WebResourceRoot}). This class loader supports detection of modified Java classes, which can be used to implement auto-reload support.
This class loader is configured by adding the pathnames of directories, JAR files, and ZIP files with the addRepository() method, prior to calling start(). When a new class is required, these repositories will be consulted first to locate the class. If it is not present, the system class loader will be used instead. @author Craig R. McClanahan @author Remy Maucherat @version $Id: WebappLoader.java 1551238 2013-12-16 15:46:02Z markt $

            } else {
                if (log.isDebugEnabled())
                    log.debug("Configuring non-privileged default Loader");
                parent = getParentClassLoader();
            }
            WebappLoader webappLoader = new WebappLoader(parent);
            webappLoader.setDelegate(getDelegate());
            setLoader(webappLoader);
        }


        // Initialize character set mapper
        getCharsetMapper();

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            } else {
                if (log.isDebugEnabled())
                    log.debug("Configuring non-privileged default Loader");
                parent = getParentClassLoader();
            }
            WebappLoader webappLoader = new WebappLoader(parent);
            webappLoader.setDelegate(getDelegate());
            setLoader(webappLoader);
        }


        // Initialize character set mapper
        getCharsetMapper();

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            } else {
                if (log.isDebugEnabled())
                    log.debug("Configuring non-privileged default Loader");
                parent = getParentClassLoader();
            }
            WebappLoader webappLoader = new WebappLoader(parent);
            webappLoader.setDelegate(getDelegate());
            setLoader(webappLoader);
        }


        // Initialize character set mapper
        getCharsetMapper();

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        if (debug >= 1)
            logger.log("Creating Loader with parent class loader '" +
                       parent + "'");


        WebappLoader loader = new WebappLoader(parent);
        return (loader);


    }

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     */
    public String createWebappLoader(String parent)
        throws Exception {


        // Create a new WebappLoader instance
        WebappLoader loader = new WebappLoader();


        // Add the new instance to its parent component
        ObjectName pname = new ObjectName(parent);
        Server server = ServerFactory.getServer();
        String type = pname.getKeyProperty("type");
        Service service = server.findService(pname.getKeyProperty("service"));
        Engine engine = (Engine) service.getContainer();
        if ((type != null) && (type.equals("Context"))) {
            Host host = (Host) engine.findChild(pname.getKeyProperty("host"));
            String pathStr = getPathStr(pname.getKeyProperty("path"));
            Context context = (Context) host.findChild(pathStr);
            context.setLoader(loader);
        } else if ((type != null) && (type.equals("DefaultContext"))) {
            String hostName = pname.getKeyProperty("host");
            DefaultContext defaultContext = null;
            if (hostName == null) {
                defaultContext = engine.getDefaultContext();
            } else {
                Host host = (Host)engine.findChild(hostName);
                defaultContext = host.getDefaultContext();
            }
            if (defaultContext != null ){
                loader.setDefaultContext(defaultContext);
                defaultContext.setLoader(loader);
            }
        }


        // Return the corresponding MBean name

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        if (getLoader() == null) {      // (2) Required by Manager
            if (getPrivileged()) {
                if (log.isDebugEnabled())
                    log.debug("Configuring privileged default Loader");
                setLoader(new WebappLoader(this.getClass().getClassLoader()));
            } else {
                if (log.isDebugEnabled())
                    log.debug("Configuring non-privileged default Loader");
                setLoader(new WebappLoader(getParentClassLoader()));
            }
        }
        if (getManager() == null) {     // (3) After prerequisites
            if (log.isDebugEnabled())
                log.debug("Configuring default Manager");

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        }
        if (getLoader() == null) {      // (2) Required by Manager
            if (getPrivileged()) {
                if (debug >= 1)
                    log("Configuring privileged default Loader");
                setLoader(new WebappLoader(this.getClass().getClassLoader()));
            } else {
                if (debug >= 1)
                    log("Configuring non-privileged default Loader");
                setLoader(new WebappLoader(getParentClassLoader()));
            }
        }
        if (getManager() == null) {     // (3) After prerequisites
            if (debug >= 1)
                log("Configuring default Manager");

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    private boolean isDefaultLoader(Loader loader) {


        if (!(loader instanceof WebappLoader)) {
            return (false);
        }
        WebappLoader wloader = (WebappLoader) loader;
        if ((wloader.getCheckInterval() != 15) ||
            (wloader.getDebug() != 0) ||
            (wloader.getDelegate() != false) ||
            !wloader.getLoaderClass().equals
             ("org.apache.catalina.loader.WebappClassLoader")) {
            return (false);
        }
        return (true);

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    {
        if ( useSeparateTomcatClassLoader )
        {
            return ( isContextReloadable() )
                ? new ExternalRepositoriesReloadableWebappLoader( getTomcatClassLoader(), getLog() )
                : new WebappLoader( getTomcatClassLoader() );
        }


        return ( isContextReloadable() )
            ? new ExternalRepositoriesReloadableWebappLoader( Thread.currentThread().getContextClassLoader(), getLog() )
            : new WebappLoader( Thread.currentThread().getContextClassLoader() );
    }

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                    {
                        getLog().error( e );
                        continue;
                    }
                }
                WebappLoader webappLoader = new WebappLoader( Thread.currentThread().getContextClassLoader() );
                Context context =
                    container.createContext( "/" + artifact.getArtifactId(), artifactWarDir.getAbsolutePath() );
                context.setLoader( webappLoader );
                File contextFile = getContextFile();
                if ( contextFile != null )

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