Examples with WebResource org.apache.catalina.WebResource used on opensource projects

Example 6 with WebResource

use of org.apache.catalina.WebResource in project tomcat by apache.

the class WebappClassLoaderBase method findResources.

/**
     * Return an enumeration of <code>URLs</code> representing all of the
     * resources with the given name.  If no resources with this name are
     * found, return an empty enumeration.
     *
     * @param name Name of the resources to be found
     *
     * @exception IOException if an input/output error occurs
     */
@Override
public Enumeration<URL> findResources(String name) throws IOException {
    if (log.isDebugEnabled())
        log.debug("    findResources(" + name + ")");
    checkStateForResourceLoading(name);
    LinkedHashSet<URL> result = new LinkedHashSet<>();
    String path = nameToPath(name);
    WebResource[] webResources = resources.getClassLoaderResources(path);
    for (WebResource webResource : webResources) {
        if (webResource.exists()) {
            result.add(webResource.getURL());
        }
    }
    // Adding the results of a call to the superclass
    if (hasExternalRepositories) {
        Enumeration<URL> otherResourcePaths = super.findResources(name);
        while (otherResourcePaths.hasMoreElements()) {
            result.add(otherResourcePaths.nextElement());
        }
    }
    return Collections.enumeration(result);
}

Example 7 with WebResource

use of org.apache.catalina.WebResource in project tomcat by apache.

the class WebappClassLoaderBase method modified.

/**
     * Have one or more classes or resources been modified so that a reload
     * is appropriate?
     * @return <code>true</code> if there's been a modification
     */
public boolean modified() {
    if (log.isDebugEnabled())
        log.debug("modified()");
    for (Entry<String, ResourceEntry> entry : resourceEntries.entrySet()) {
        long cachedLastModified = entry.getValue().lastModified;
        long lastModified = resources.getClassLoaderResource(entry.getKey()).getLastModified();
        if (lastModified != cachedLastModified) {
            if (log.isDebugEnabled())
                log.debug(sm.getString("webappClassLoader.resourceModified", entry.getKey(), new Date(cachedLastModified), new Date(lastModified)));
            return true;
        }
    }
    // Check if JARs have been added or removed
    WebResource[] jars = resources.listResources("/WEB-INF/lib");
    // Filter out non-JAR resources
    int jarCount = 0;
    for (WebResource jar : jars) {
        if (jar.getName().endsWith(".jar") && jar.isFile() && jar.canRead()) {
            jarCount++;
            Long recordedLastModified = jarModificationTimes.get(jar.getName());
            if (recordedLastModified == null) {
                // Jar has been added
                log.info(sm.getString("webappClassLoader.jarsAdded", resources.getContext().getName()));
                return true;
            }
            if (recordedLastModified.longValue() != jar.getLastModified()) {
                // Jar has been changed
                log.info(sm.getString("webappClassLoader.jarsModified", resources.getContext().getName()));
                return true;
            }
        }
    }
    if (jarCount < jarModificationTimes.size()) {
        log.info(sm.getString("webappClassLoader.jarsRemoved", resources.getContext().getName()));
        return true;
    }
    // No classes have been modified
    return false;
}

Example 8 with WebResource

use of org.apache.catalina.WebResource in project tomcat by apache.

the class WebappClassLoaderBase method getResourceAsStream.

/**
     * Find the resource with the given name, and return an input stream
     * that can be used for reading it.  The search order is as described
     * for <code>getResource()</code>, after checking to see if the resource
     * data has been previously cached.  If the resource cannot be found,
     * return <code>null</code>.
     *
     * @param name Name of the resource to return an input stream for
     */
@Override
public InputStream getResourceAsStream(String name) {
    if (log.isDebugEnabled())
        log.debug("getResourceAsStream(" + name + ")");
    checkStateForResourceLoading(name);
    InputStream stream = null;
    boolean delegateFirst = delegate || filter(name, false);
    // (1) Delegate to parent if requested
    if (delegateFirst) {
        if (log.isDebugEnabled())
            log.debug("  Delegating to parent classloader " + parent);
        stream = parent.getResourceAsStream(name);
        if (stream != null) {
            if (log.isDebugEnabled())
                log.debug("  --> Returning stream from parent");
            return stream;
        }
    }
    // (2) Search local repositories
    if (log.isDebugEnabled())
        log.debug("  Searching local repositories");
    String path = nameToPath(name);
    WebResource resource = resources.getClassLoaderResource(path);
    if (resource.exists()) {
        stream = resource.getInputStream();
        trackLastModified(path, resource);
    }
    try {
        if (hasExternalRepositories && stream == null) {
            URL url = super.findResource(name);
            if (url != null) {
                stream = url.openStream();
            }
        }
    } catch (IOException e) {
    // Ignore
    }
    if (stream != null) {
        if (log.isDebugEnabled())
            log.debug("  --> Returning stream from local");
        return stream;
    }
    // (3) Delegate to parent unconditionally
    if (!delegateFirst) {
        if (log.isDebugEnabled())
            log.debug("  Delegating to parent classloader unconditionally " + parent);
        stream = parent.getResourceAsStream(name);
        if (stream != null) {
            if (log.isDebugEnabled())
                log.debug("  --> Returning stream from parent");
            return stream;
        }
    }
    // (4) Resource was not found
    if (log.isDebugEnabled())
        log.debug("  --> Resource not found, returning null");
    return null;
}

Example 9 with WebResource

use of org.apache.catalina.WebResource in project tomcat by apache.

the class WebappClassLoaderBase method findResource.

/**
     * Find the specified resource in our local repository, and return a
     * <code>URL</code> referring to it, or <code>null</code> if this resource
     * cannot be found.
     *
     * @param name Name of the resource to be found
     */
@Override
public URL findResource(final String name) {
    if (log.isDebugEnabled())
        log.debug("    findResource(" + name + ")");
    checkStateForResourceLoading(name);
    URL url = null;
    String path = nameToPath(name);
    WebResource resource = resources.getClassLoaderResource(path);
    if (resource.exists()) {
        url = resource.getURL();
        trackLastModified(path, resource);
    }
    if ((url == null) && hasExternalRepositories) {
        url = super.findResource(name);
    }
    if (log.isDebugEnabled()) {
        if (url != null)
            log.debug("    --> Returning '" + url.toString() + "'");
        else
            log.debug("    --> Resource not found, returning null");
    }
    return url;
}

Example 10 with WebResource

use of org.apache.catalina.WebResource in project tomcat by apache.

the class WebappClassLoaderBase method findClassInternal.

/**
     * Find specified class in local repositories.
     *
     * @param name The binary name of the class to be loaded
     *
     * @return the loaded class, or null if the class isn't found
     */
protected Class<?> findClassInternal(String name) {
    checkStateForResourceLoading(name);
    if (name == null) {
        return null;
    }
    String path = binaryNameToPath(name, true);
    ResourceEntry entry = resourceEntries.get(path);
    WebResource resource = null;
    if (entry == null) {
        resource = resources.getClassLoaderResource(path);
        if (!resource.exists()) {
            return null;
        }
        entry = new ResourceEntry();
        entry.lastModified = resource.getLastModified();
        // Add the entry in the local resource repository
        synchronized (resourceEntries) {
            // Ensures that all the threads which may be in a race to load
            // a particular class all end up with the same ResourceEntry
            // instance
            ResourceEntry entry2 = resourceEntries.get(path);
            if (entry2 == null) {
                resourceEntries.put(path, entry);
            } else {
                entry = entry2;
            }
        }
    }
    Class<?> clazz = entry.loadedClass;
    if (clazz != null)
        return clazz;
    synchronized (getClassLoadingLock(name)) {
        clazz = entry.loadedClass;
        if (clazz != null)
            return clazz;
        if (resource == null) {
            resource = resources.getClassLoaderResource(path);
        }
        if (!resource.exists()) {
            return null;
        }
        byte[] binaryContent = resource.getContent();
        Manifest manifest = resource.getManifest();
        URL codeBase = resource.getCodeBase();
        Certificate[] certificates = resource.getCertificates();
        if (transformers.size() > 0) {
            // If the resource is a class just being loaded, decorate it
            // with any attached transformers
            String className = name.endsWith(CLASS_FILE_SUFFIX) ? name.substring(0, name.length() - CLASS_FILE_SUFFIX.length()) : name;
            String internalName = className.replace(".", "/");
            for (ClassFileTransformer transformer : this.transformers) {
                try {
                    byte[] transformed = transformer.transform(this, internalName, null, null, binaryContent);
                    if (transformed != null) {
                        binaryContent = transformed;
                    }
                } catch (IllegalClassFormatException e) {
                    log.error(sm.getString("webappClassLoader.transformError", name), e);
                    return null;
                }
            }
        }
        // Looking up the package
        String packageName = null;
        int pos = name.lastIndexOf('.');
        if (pos != -1)
            packageName = name.substring(0, pos);
        Package pkg = null;
        if (packageName != null) {
            pkg = getPackage(packageName);
            // Define the package (if null)
            if (pkg == null) {
                try {
                    if (manifest == null) {
                        definePackage(packageName, null, null, null, null, null, null, null);
                    } else {
                        definePackage(packageName, manifest, codeBase);
                    }
                } catch (IllegalArgumentException e) {
                // Ignore: normal error due to dual definition of package
                }
                pkg = getPackage(packageName);
            }
        }
        if (securityManager != null) {
            // Checking sealing
            if (pkg != null) {
                boolean sealCheck = true;
                if (pkg.isSealed()) {
                    sealCheck = pkg.isSealed(codeBase);
                } else {
                    sealCheck = (manifest == null) || !isPackageSealed(packageName, manifest);
                }
                if (!sealCheck)
                    throw new SecurityException("Sealing violation loading " + name + " : Package " + packageName + " is sealed.");
            }
        }
        try {
            clazz = defineClass(name, binaryContent, 0, binaryContent.length, new CodeSource(codeBase, certificates));
        } catch (UnsupportedClassVersionError ucve) {
            throw new UnsupportedClassVersionError(ucve.getLocalizedMessage() + " " + sm.getString("webappClassLoader.wrongVersion", name));
        }
        entry.loadedClass = clazz;
    }
    return clazz;
}