Example usage for org.apache.commons.vfs FileObject refresh

Introduction

In this page you can find the example usage for org.apache.commons.vfs FileObject refresh.

Prototype

public void refresh() throws FileSystemException;

Source Link

Document

This will prepare the fileObject to get resynchronized with the underlaying filesystem if required

Usage

From source file:mondrian.spi.impl.ApacheVfsVirtualFileHandler.java

public InputStream readVirtualFile(String url) throws FileSystemException {
    // Treat catalogUrl as an Apache VFS (Virtual File System) URL.
    // VFS handles all of the usual protocols (http:, file:)
    // and then some.
    FileSystemManager fsManager = VFS.getManager();
    if (fsManager == null) {
        throw Util.newError("Cannot get virtual file system manager");
    }/*w  w  w  . ja  v  a2s .  c om*/

    // Workaround VFS bug.
    if (url.startsWith("file://localhost")) {
        url = url.substring("file://localhost".length());
    }
    if (url.startsWith("file:")) {
        url = url.substring("file:".length());
    }

    //work around for VFS bug not closing http sockets
    // (Mondrian-585)
    if (url.startsWith("http")) {
        try {
            return new URL(url).openStream();
        } catch (IOException e) {
            throw Util.newError("Could not read URL: " + url);
        }
    }

    File userDir = new File("").getAbsoluteFile();
    FileObject file = fsManager.resolveFile(userDir, url);
    FileContent fileContent = null;
    try {
        // Because of VFS caching, make sure we refresh to get the latest
        // file content. This refresh may possibly solve the following
        // workaround for defect MONDRIAN-508, but cannot be tested, so we
        // will leave the work around for now.
        file.refresh();

        // Workaround to defect MONDRIAN-508. For HttpFileObjects, verifies
        // the URL of the file retrieved matches the URL passed in.  A VFS
        // cache bug can cause it to treat URLs with different parameters
        // as the same file (e.g. http://blah.com?param=A,
        // http://blah.com?param=B)
        if (file instanceof HttpFileObject && !file.getName().getURI().equals(url)) {
            fsManager.getFilesCache().removeFile(file.getFileSystem(), file.getName());

            file = fsManager.resolveFile(userDir, url);
        }

        if (!file.isReadable()) {
            throw Util.newError("Virtual file is not readable: " + url);
        }

        fileContent = file.getContent();
    } finally {
        file.close();
    }

    if (fileContent == null) {
        throw Util.newError("Cannot get virtual file content: " + url);
    }

    return fileContent.getInputStream();
}

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From source file:net.sf.vfsjfilechooser.plaf.basic.BasicVFSDirectoryModel.java

/**
 *
 *///from w w  w  .  j av  a2 s  .c  om
public void validateFileCache() {
    FileObject currentDirectory = filechooser.getCurrentDirectory();

    if (currentDirectory == null) {
        return;
    }

    try {
        currentDirectory.refresh();
    } catch (FileSystemException ex) {
    }

    if (loadThread != null) {
        loadThread.cancel(true);
    }

    setBusy(true, ++fetchID);

    loadThread = executor.submit(new LoadFilesThread(currentDirectory, fetchID));
}

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From source file:egovframework.rte.fdl.filehandling.FilehandlingServiceTest.java

/**
 * ? ? , ?  ??  ?? ?/*from ww w .  ja  v  a  2s.c om*/
 * ?  ? ? ? .
 * @throws Exception
 */
@Test
public void testCaching() throws Exception {
    String testFolder = "d:/workspace/java/e-gov/eGovFramework/RTE/DEV/trunk/Foundation/egovframework.rte.fdl.filehandling/testfolder";
    FileSystemManager manager = VFS.getManager();

    FileObject scratchFolder = manager.resolveFile(testFolder);

    // testfolder ?  ? 
    scratchFolder.delete(Selectors.EXCLUDE_SELF);

    // ? Manager ?
    DefaultFileSystemManager fs = new DefaultFileSystemManager();
    fs.setFilesCache(manager.getFilesCache());

    // zip, jar, tgz, tar, tbz2, file
    if (!fs.hasProvider("file")) {
        fs.addProvider("file", new DefaultLocalFileProvider());
    }

    fs.setCacheStrategy(CacheStrategy.ON_RESOLVE);
    fs.init();

    // ? ? ?
    FileObject foBase2 = fs.resolveFile(testFolder);
    log.debug("## scratchFolder.getName().getPath() : " + scratchFolder.getName().getPath());

    FileObject cachedFolder = foBase2.resolveFile(scratchFolder.getName().getPath());

    // ??  ?
    FileObject[] fos = cachedFolder.getChildren();
    assertFalse(contains(fos, "file1.txt"));

    // ??
    scratchFolder.resolveFile("file1.txt").createFile();

    // ? 
    // BUT cachedFolder ? ??  ?
    fos = cachedFolder.getChildren();
    assertFalse(contains(fos, "file1.txt"));

    // 
    cachedFolder.refresh();
    // ?? 
    fos = cachedFolder.getChildren();
    assertTrue(contains(fos, "file1.txt"));

}

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From source file:mondrian.olap.Util.java

/**
 * Gets content via Apache VFS. File must exist and have content
 *
 * @param url String// www. ja v  a2s .  c o m
 * @return Apache VFS FileContent for further processing
 * @throws FileSystemException on error
 */
public static InputStream readVirtualFile(String url) throws FileSystemException {
    // Treat catalogUrl as an Apache VFS (Virtual File System) URL.
    // VFS handles all of the usual protocols (http:, file:)
    // and then some.
    FileSystemManager fsManager = VFS.getManager();
    if (fsManager == null) {
        throw newError("Cannot get virtual file system manager");
    }

    // Workaround VFS bug.
    if (url.startsWith("file://localhost")) {
        url = url.substring("file://localhost".length());
    }
    if (url.startsWith("file:")) {
        url = url.substring("file:".length());
    }

    // work around for VFS bug not closing http sockets
    // (Mondrian-585)
    if (url.startsWith("http")) {
        try {
            return new URL(url).openStream();
        } catch (IOException e) {
            throw newError("Could not read URL: " + url);
        }
    }

    File userDir = new File("").getAbsoluteFile();
    FileObject file = fsManager.resolveFile(userDir, url);
    FileContent fileContent = null;
    try {
        // Because of VFS caching, make sure we refresh to get the latest
        // file content. This refresh may possibly solve the following
        // workaround for defect MONDRIAN-508, but cannot be tested, so we
        // will leave the work around for now.
        file.refresh();

        // Workaround to defect MONDRIAN-508. For HttpFileObjects, verifies
        // the URL of the file retrieved matches the URL passed in.  A VFS
        // cache bug can cause it to treat URLs with different parameters
        // as the same file (e.g. http://blah.com?param=A,
        // http://blah.com?param=B)
        if (file instanceof HttpFileObject && !file.getName().getURI().equals(url)) {
            fsManager.getFilesCache().removeFile(file.getFileSystem(), file.getName());

            file = fsManager.resolveFile(userDir, url);
        }

        if (!file.isReadable()) {
            throw newError("Virtual file is not readable: " + url);
        }

        fileContent = file.getContent();
    } finally {
        file.close();
    }

    if (fileContent == null) {
        throw newError("Cannot get virtual file content: " + url);
    }

    return fileContent.getInputStream();
}

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From source file:org.objectweb.proactive.extensions.dataspaces.vfs.VFSNodeScratchSpaceImpl.java

public synchronized void close() throws IllegalStateException {
    logger.debug("Closing node scratch space");
    checkIfConfigured();// w w w . ja  va2 s .  com

    try {
        final FileObject fRuntime = partialSpaceFile.getParent();

        // rm -r node
        partialSpaceFile.delete(Selectors.SELECT_ALL);

        // try to remove runtime file
        // IMPORTANT FIXME: it seems that despite of VFS FileObject documentation,
        // looking at AbstractFileObject docs suggests that it does not implement this
        // delete-if-empty behavior! at least, it appears to be not atomic (and probably may be never atomic
        // as some protocols may not support this kind of atomic operation?)
        // refreshing file before deleting may minimize the risk of delete-when-non-empty behavior
        fRuntime.refresh();
        try {
            final boolean deleted = fRuntime.delete();
            if (deleted)
                logger.debug("Scratch directory for whole runtime was deleted (considered as empty)");
            else
                logger.debug("Scratch directory for whole runtime was not deleted (not considered as empty)");
        } catch (org.apache.commons.vfs.FileSystemException x) {
            logger.debug("Could not delete scratch directory for whole runtime - perhaps it was not empty", x);
        }

        // it is probably not needed to close files if manager is closed, but with VFS you never know...
        fRuntime.close();
        partialSpaceFile.close();
    } catch (org.apache.commons.vfs.FileSystemException x) {
        ProActiveLogger.logEatedException(logger, "Could not close correctly node scratch space", x);
    } finally {
        this.fileSystemManager.close();
    }
    logger.debug("Closed node scratch space");
}

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From source file:org.sonatype.gshell.vfs.FileSystemAccessImpl.java

public FileObject resolveFile(final FileObject baseFile, final String name) throws FileSystemException {
    FileObject f = getManager().resolveFile(baseFile, name);
    FileObject d = dereference(f);
    if (d != null) {
        d.refresh();
    }/*from  w ww  . j  av  a 2 s  .c om*/
    return f;
}

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From source file:org.sonatype.gshell.vfs.FileSystemAccessImpl.java

public FileObject resolveFile(final String name) throws FileSystemException {
    FileObject f = getManager().resolveFile(getCurrentDirectory(), name);
    FileObject d = dereference(f);
    if (d != null) {
        d.refresh();
    }// w  ww  .ja  va 2  s . co  m
    return f;
}

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From source file:org.sonatype.gshell.vfs.FileSystemAccessImpl.java

public File getLocalFile(final FileObject file) throws FileSystemException {
    if (!isLocalFile(file)) {
        throw new FileSystemException("Unable to get local file from: " + file.getClass());
    }/*from   w  ww.  j  a va 2 s.c  o  m*/

    try {
        file.refresh();
        Field field = LocalFile.class.getDeclaredField("file");

        try {
            return (File) field.get(file);
        } catch (IllegalAccessException ignore) {
            // try again
            field.setAccessible(true);
            return (File) field.get(file);
        }
    } catch (Exception e) {
        throw new FileSystemException(e);
    }
}

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From source file:org.sonatype.gshell.vfs.FileSystemAccessImpl.java

public FileObject dereference(final FileObject file) throws FileSystemException {
    assert file != null;

    if (file instanceof DelegateFileObject) {
        try {/*from w  w  w  .j a  v  a 2s.com*/
            file.refresh();
            Field field = DelegateFileObject.class.getDeclaredField("file");

            try {
                return (FileObject) field.get(file);
            } catch (IllegalAccessException ignore) {
                // try again
                field.setAccessible(true);
                return (FileObject) field.get(file);
            }
        } catch (Exception e) {
            throw new FileSystemException(e);
        }
    }

    return file;
}

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