Example usage for org.apache.commons.vfs FileSystemManager getFilesCache

Introduction

In this page you can find the example usage for org.apache.commons.vfs FileSystemManager getFilesCache.

Prototype

public FilesCache getFilesCache();

Source Link

Document

Get the cache used to cache fileobjects.

Usage

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

/**
 * ? ? , ?  ??  ?? ?/*  ww  w.  ja v  a 2s  .c  o  m*/
 * ?  ? ? ? .
 * @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:egovframework.rte.fdl.filehandling.FilehandlingServiceTest.java

@Test
public void testCaching1() throws Exception {
    String testFolder = "d:/workspace/java/e-gov/eGovFramework/RTE/DEV/trunk/Foundation/egovframework.rte.fdl.filehandling/test";

    FileSystemManager manager = VFS.getManager();

    EgovFileUtil.writeFile(testFolder + "/file1.txt", text, "UTF-8");

    /*//from  www.j a  va2  s. c  o  m
     * ? Manager ?
     * CacheStrategy.MANUAL      : Deal with cached data manually. Call FileObject.refresh() to refresh the object data.
     * CacheStrategy.ON_RESOLVE : Refresh the data every time you request a file from FileSystemManager.resolveFile
     * CacheStrategy.ON_CALL   : Refresh the data every time you call a method on the fileObject. You'll use this only if you really need the latest info as this setting is a major performance loss. 
     */
    DefaultFileSystemManager fs = new DefaultFileSystemManager();
    fs.setFilesCache(manager.getFilesCache());

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

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

    // ? ? ?
    //FileObject foBase2 = fs.resolveFile(testFolder);
    log.debug("####1");
    FileObject cachedFile = fs.toFileObject(new File(testFolder + "/file1.txt"));
    log.debug("####2");

    FilesCache filesCache = fs.getFilesCache();
    log.debug("####3");
    filesCache.putFile(cachedFile);
    FileObject obj = filesCache.getFile(cachedFile.getFileSystem(), cachedFile.getName());

    //FileObject baseFile = fs.getBaseFile();
    //        log.debug("### cachedFile.getContent().getSize() is " + cachedFile.getContent().getSize());

    //        long fileSize = cachedFile.getContent().getSize();
    //        log.debug("#########size is " + fileSize);
    //FileObject cachedFile1 = cachedFile.resolveFile("file2.txt");

    //       FileObject scratchFolder = manager.resolveFile(testFolder);
    //       scratchFolder.delete(Selectors.EXCLUDE_SELF);

    EgovFileUtil.delete(new File(testFolder + "/file1.txt"));

    //       obj.createFile();

    //        log.debug("#########obj is " + obj.toString());
    //        log.debug("#########size is " + obj.getContent().getSize());
    log.debug("#########file is " + obj.exists());

    fs.close();
}

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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");
    }/*from  ww  w. j  a v  a2s .co m*/

    // 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:mondrian.olap.Util.java

/**
 * Gets content via Apache VFS. File must exist and have content
 *
 * @param url String// w w  w  . j  a va  2 s.  com
 * @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.eclim.plugin.core.command.archive.ArchiveReadCommand.java

/**
 * {@inheritDoc}/*www  .  ja  v a 2  s.c  om*/
 */
public String execute(CommandLine commandLine) throws Exception {
    InputStream in = null;
    OutputStream out = null;
    FileSystemManager fsManager = null;
    try {
        String file = commandLine.getValue(Options.FILE_OPTION);

        fsManager = VFS.getManager();
        FileObject fileObject = fsManager.resolveFile(file);
        FileObject tempFile = fsManager
                .resolveFile(SystemUtils.JAVA_IO_TMPDIR + "/eclim/" + fileObject.getName().getPath());

        // the vfs file cache isn't very intelligent, so clear it.
        fsManager.getFilesCache().clear(fileObject.getFileSystem());
        fsManager.getFilesCache().clear(tempFile.getFileSystem());

        // NOTE: FileObject.getName().getPath() does not include the drive
        // information.
        String path = tempFile.getName().getURI().substring(URI_PREFIX.length());
        // account for windows uri which has an extra '/' in front of the drive
        // letter (file:///C:/blah/blah/blah).
        if (WIN_PATH.matcher(path).matches()) {
            path = path.substring(1);
        }

        //if(!tempFile.exists()){
        tempFile.createFile();

        in = fileObject.getContent().getInputStream();
        out = tempFile.getContent().getOutputStream();
        IOUtils.copy(in, out);

        new File(path).deleteOnExit();
        //}

        return path;
    } finally {
        IOUtils.closeQuietly(in);
        IOUtils.closeQuietly(out);
    }
}

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