webappclassloader.java

This temp directory is used by the JVM for temporary file storage. The JVM is configured to use thi

    protected boolean started = false;


    /**
     * Has external repositories.
     */
    protected boolean hasExternalRepositories = false;


    /**
     * All permission.
     */
    private Permission allPermission = new java.security.AllPermission();


    // ------------------------------------------------------------- Properties


    /**
     * Get associated resources.
     */
    public DirContext getResources() {

        return this.resources;

    }


    /**
     * Set associated resources.
     */
    public void setResources(DirContext resources) {

        this.resources = resources;

    }


    /**
     * Return the debugging detail level for this component.
     */
    public int getDebug() {

        return (this.debug);

    }


    /**
     * Set the debugging detail level for this component.
     *
     * @param debug The new debugging detail level
     */
    public void setDebug(int debug) {

        this.debug = debug;

    }


    /**
     * Return the "delegate first" flag for this class loader.
     */
    public boolean getDelegate() {

        return (this.delegate);

    }


    /**
     * Set the "delegate first" flag for this class loader.
     *
     * @param delegate The new "delegate first" flag
     */
    public void setDelegate(boolean delegate) {

        this.delegate = delegate;

    }


    /**
     * If there is a Java SecurityManager create a read FilePermission
     * or JndiPermission for the file directory path.
     *
     * @param path file directory path
     */
    public void addPermission(String path) {
        if (path == null) {
            return;
        }

        if (securityManager != null) {
            Permission permission = null;
            if( path.startsWith("jndi:") || path.startsWith("jar:jndi:") ) {
                if (!path.endsWith("/")) {
                    path = path + "/";
                }
                permission = new JndiPermission(path + "*");
                addPermission(permission);
            } else {
                if (!path.endsWith(File.separator)) {
                    permission = new FilePermission(path, "read");
                    addPermission(permission);
                    path = path + File.separator;
                }
                permission = new FilePermission(path + "-", "read");
                addPermission(permission);
            }
        }
    }


    /**
     * If there is a Java SecurityManager create a read FilePermission
     * or JndiPermission for URL.
     *
     * @param url URL for a file or directory on local system
     */
    public void addPermission(URL url) {
        if (url != null) {
            addPermission(url.toString());
        }
    }


    /**
     * If there is a Java SecurityManager create a Permission.
     *
     * @param url URL for a file or directory on local system
     */
    public void addPermission(Permission permission) {
        if ((securityManager != null) && (permission != null)) {
            permissionList.add(permission);
        }
    }


    /**
     * Return the JAR path.
     */
    public String getJarPath() {

        return this.jarPath;

    }


    /**
     * Change the Jar path.
     */
    public void setJarPath(String jarPath) {

        this.jarPath = jarPath;

    }


    /**
     * Change the work directory.
     */
    public void setWorkDir(File workDir) {
        this.loaderDir = new File(workDir, "loader");
    }


    // ------------------------------------------------------- Reloader Methods


    /**
     * Add a new repository to the set of places this ClassLoader can look for
     * classes to be loaded.
     *
     * @param repository Name of a source of classes to be loaded, such as a
     *  directory pathname, a JAR file pathname, or a ZIP file pathname
     *
     * @exception IllegalArgumentException if the specified repository is
     *  invalid or does not exist
     */
    public void addRepository(String repository) {

        // Ignore any of the standard repositories, as they are set up using
        // either addJar or addRepository
        if (repository.startsWith("/WEB-INF/lib")
            || repository.startsWith("/WEB-INF/classes"))
            return;

        // Add this repository to our underlying class loader
        try {
            URL url = new URL(repository);
            super.addURL(url);
            hasExternalRepositories = true;
            repositoryURLs = null;
        } catch (MalformedURLException e) {
            throw new IllegalArgumentException(e.toString());
        }

    }


    /**
     * Add a new repository to the set of places this ClassLoader can look for
     * classes to be loaded.
     *
     * @param repository Name of a source of classes to be loaded, such as a
     *  directory pathname, a JAR file pathname, or a ZIP file pathname
     *
     * @exception IllegalArgumentException if the specified repository is
     *  invalid or does not exist
     */
    synchronized void addRepository(String repository, File file) {

        // Note : There should be only one (of course), but I think we should
        // keep this a bit generic

        if (repository == null)
            return;

        if (log.isDebugEnabled())
            log.debug("addRepository(" + repository + ")");

        int i;

        // Add this repository to our internal list
        String[] result = new String[repositories.length + 1];
        for (i = 0; i < repositories.length; i++) {
            result[i] = repositories[i];
        }
        result[repositories.length] = repository;
        repositories = result;

        // Add the file to the list
        File[] result2 = new File[files.length + 1];
        for (i = 0; i < files.length; i++) {
            result2[i] = files[i];
        }
        result2[files.length] = file;
        files = result2;

    }


    synchronized void addJar(String jar, JarFile jarFile, File file)
        throws IOException {

        if (jar == null)
            return;
        if (jarFile == null)
            return;
        if (file == null)
            return;

        if (log.isDebugEnabled())
            log.debug("addJar(" + jar + ")");

        int i;

        if ((jarPath != null) && (jar.startsWith(jarPath))) {

            String jarName = jar.substring(jarPath.length());
            while (jarName.startsWith("/"))
                jarName = jarName.substring(1);

            String[] result = new String[jarNames.length + 1];
            for (i = 0; i < jarNames.length; i++) {
                result[i] = jarNames[i];
            }
            result[jarNames.length] = jarName;
            jarNames = result;

        }

        try {

            // Register the JAR for tracking

            long lastModified =
                ((ResourceAttributes) resources.getAttributes(jar))
                .getLastModified();

            String[] result = new String[paths.length + 1];
            for (i = 0; i < paths.length; i++) {
                result[i] = paths[i];
            }
            result[paths.length] = jar;
            paths = result;

            long[] result3 = new long[lastModifiedDates.length + 1];
            for (i = 0; i < lastModifiedDates.length; i++) {
                result3[i] = lastModifiedDates[i];
            }
            result3[lastModifiedDates.length] = lastModified;
            lastModifiedDates = result3;

        } catch (NamingException e) {
            // Ignore
        }

        // If the JAR currently contains invalid classes, don't actually use it
        // for classloading
        if (!validateJarFile(file))
            return;

        JarFile[] result2 = new JarFile[jarFiles.length + 1];
        for (i = 0; i < jarFiles.length; i++) {
            result2[i] = jarFiles[i];
        }
        result2[jarFiles.length] = jarFile;
        jarFiles = result2;

        // Add the file to the list
        File[] result4 = new File[jarRealFiles.length + 1];
        for (i = 0; i < jarRealFiles.length; i++) {
            result4[i] = jarRealFiles[i];
        }
        result4[jarRealFiles.length] = file;
        jarRealFiles = result4;
    }


    /**
     * Return a String array of the current repositories for this class
     * loader.  If there are no repositories, a zero-length array is
     * returned.For security reason, returns a clone of the Array (since 
     * String are immutable).
     */
    public String[] findRepositories() {

        return ((String[])repositories.clone());

    }


    /**
     * Have one or more classes or resources been modified so that a reload
     * is appropriate?
     */
    public boolean modified() {

        if (log.isDebugEnabled())
            log.debug("modified()");

        // Checking for modified loaded resources
        int length = paths.length;

        // A rare race condition can occur in the updates of the two arrays
        // It's totally ok if the latest class added is not checked (it will
        // be checked the next time
        int length2 = lastModifiedDates.length;
        if (length > length2)
            length = length2;

        for (int i = 0; i < length; i++) {
            try {
                long lastModified =
                    ((ResourceAttributes) resources.getAttributes(paths[i]))
                    .getLastModified();
                if (lastModified != lastModifiedDates[i]) {
                    if( log.isDebugEnabled() ) 
                        log.debug("  Resource '" + paths[i]
                                  + "' was modified; Date is now: "
                                  + new java.util.Date(lastModified) + " Was: "
                                  + new java.util.Date(lastModifiedDates[i]));
                    return (true);
                }
            } catch (NamingException e) {
                log.error("    Resource '" + paths[i] + "' is missing");
                return (true);
            }
        }

        length = jarNames.length;

        // Check if JARs have been added or removed
        if (getJarPath() != null) {

            try {
                NamingEnumeration enum = resources.listBindings(getJarPath());
                int i = 0;
                while (enum.hasMoreElements() && (i < length)) {
                    NameClassPair ncPair = (NameClassPair) enum.nextElement();
                    String name = ncPair.getName();
                    // Ignore non JARs present in the lib folder
                    if (!name.endsWith(".jar"))
                        continue;
                    if (!name.equals(jarNames[i])) {
                        // Missing JAR
                        log.info("    Additional JARs have been added : '" 
                                 + name + "'");
                        return (true);
                    }
                    i++;
                }
                if (enum.hasMoreElements()) {