Java FileUtils.delete方法代码示例

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
/**
 * We use a ReferenceQueue to manage deleting files that have been compacted
 * and for which no more SSTable references exist.  But this is not guaranteed
 * to run for each such file because of the semantics of the JVM gc.  So,
 * we write a marker to `compactedFilename` when a file is compacted;
 * if such a marker exists on startup, the file should be removed.
 *
 * This method will also remove SSTables that are marked as temporary.
 *
 * @return true if the file was deleted
 */
public static boolean delete(Descriptor desc, Set<Component> components)
{
    // remove the DATA component first if it exists
    if (components.contains(Component.DATA))
        FileUtils.deleteWithConfirm(desc.filenameFor(Component.DATA));
    for (Component component : components)
    {
        if (component.equals(Component.DATA) || component.equals(Component.SUMMARY))
            continue;

        FileUtils.deleteWithConfirm(desc.filenameFor(component));
    }

    if (components.contains(Component.SUMMARY))
        FileUtils.delete(desc.filenameFor(Component.SUMMARY));

    logger.trace("Deleted {}", desc);
    return true;
}
 

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
/**
 * We use a ReferenceQueue to manage deleting files that have been compacted
 * and for which no more SSTable references exist.  But this is not guaranteed
 * to run for each such file because of the semantics of the JVM gc.  So,
 * we write a marker to `compactedFilename` when a file is compacted;
 * if such a marker exists on startup, the file should be removed.
 *
 * This method will also remove SSTables that are marked as temporary.
 *
 * @return true if the file was deleted
 */
public static boolean delete(Descriptor desc, Set<Component> components)
{
    // remove the DATA component first if it exists
    if (components.contains(Component.DATA))
        FileUtils.deleteWithConfirm(desc.filenameFor(Component.DATA));
    for (Component component : components)
    {
        if (component.equals(Component.DATA) || component.equals(Component.SUMMARY))
            continue;

        FileUtils.deleteWithConfirm(desc.filenameFor(component));
    }
    FileUtils.delete(desc.filenameFor(Component.SUMMARY));

    logger.debug("Deleted {}", desc);
    return true;
}
 

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
/**
 * We use a ReferenceQueue to manage deleting files that have been compacted
 * and for which no more SSTable references exist.  But this is not guaranteed
 * to run for each such file because of the semantics of the JVM gc.  So,
 * we write a marker to `compactedFilename` when a file is compacted;
 * if such a marker exists on startup, the file should be removed.
 *
 * This method will also remove SSTables that are marked as temporary.
 *
 * @return true if the file was deleted
 */
public static boolean delete(Descriptor desc, Set<Component> components)
{
    // remove the DATA component first if it exists
    if (components.contains(Component.DATA))
        FileUtils.deleteWithConfirm(desc.filenameFor(Component.DATA));
    for (Component component : components)
    {
        if (component.equals(Component.DATA) || component.equals(Component.COMPACTED_MARKER) || component.equals(Component.SUMMARY))
            continue;

        FileUtils.deleteWithConfirm(desc.filenameFor(component));
    }
    // remove the COMPACTED_MARKER component last if it exists
    // Note: newly created sstable should not have a marker, but we keep this for now to make sure
    // we don't leave older marker around
    FileUtils.delete(desc.filenameFor(Component.COMPACTED_MARKER));
    FileUtils.delete(desc.filenameFor(Component.SUMMARY));

    logger.debug("Deleted {}", desc);
    return true;
}
 

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
private void rewriteSSTableMetadata(Descriptor descriptor, Map<MetadataType, MetadataComponent> currentComponents) throws IOException
{
    String filePath = descriptor.tmpFilenameFor(Component.STATS);
    try (DataOutputStreamPlus out = new BufferedDataOutputStreamPlus(new FileOutputStream(filePath)))
    {
        serialize(currentComponents, out, descriptor.version);
        out.flush();
    }
    // we cant move a file on top of another file in windows:
    if (FBUtilities.isWindows)
        FileUtils.delete(descriptor.filenameFor(Component.STATS));
    FileUtils.renameWithConfirm(filePath, descriptor.filenameFor(Component.STATS));

}
 

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
private void rewriteSSTableMetadata(Descriptor descriptor, Map<MetadataType, MetadataComponent> currentComponents) throws IOException
{
    Descriptor tmpDescriptor = descriptor.asType(Descriptor.Type.TEMP);

    try (DataOutputStreamAndChannel out = new DataOutputStreamAndChannel(new FileOutputStream(tmpDescriptor.filenameFor(Component.STATS))))
    {
        serialize(currentComponents, out);
        out.flush();
    }
    // we cant move a file on top of another file in windows:
    if (FBUtilities.isWindows())
        FileUtils.delete(descriptor.filenameFor(Component.STATS));
    FileUtils.renameWithConfirm(tmpDescriptor.filenameFor(Component.STATS), descriptor.filenameFor(Component.STATS));

}
 

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
protected static void cleanupSavedCaches()
{
    File cachesDir = new File(DatabaseDescriptor.getSavedCachesLocation());

    if (!cachesDir.exists() || !cachesDir.isDirectory())
        return;

    FileUtils.delete(cachesDir.listFiles());
}
 

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
public void release()
{
    int n = references.decrementAndGet();
    if (n == 0)
    {
        FileUtils.closeQuietly(index);
        sstable.releaseReference();
        if (obsolete.get() || sstable.isMarkedCompacted())
            FileUtils.delete(index.getIndexPath());
    }
}
 

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
private void rewriteSSTableMetadata(Descriptor descriptor, Map<MetadataType, MetadataComponent> currentComponents) throws IOException
{
    String filePath = descriptor.tmpFilenameFor(Component.STATS);
    try (DataOutputStreamPlus out = new BufferedDataOutputStreamPlus(new FileOutputStream(filePath)))
    {
        serialize(currentComponents, out, descriptor.version);
        out.flush();
    }
    // we cant move a file on top of another file in windows:
    if (FBUtilities.isWindows())
        FileUtils.delete(descriptor.filenameFor(Component.STATS));
    FileUtils.renameWithConfirm(filePath, descriptor.filenameFor(Component.STATS));

}
 

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
public static void cleanupSavedCaches()
{
    File cachesDir = new File(DatabaseDescriptor.getSavedCachesLocation());

    if (!cachesDir.exists() || !cachesDir.isDirectory())
        return;

    FileUtils.delete(cachesDir.listFiles());
}
 

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
private static void cleanupSavedCaches() {
  File cachesDir = new File(DatabaseDescriptor.getSavedCachesLocation());
  if (!cachesDir.exists() || !cachesDir.isDirectory()) return;

  FileUtils.delete(cachesDir.listFiles());
}
 

import org.apache.cassandra.io.util.FileUtils; //导入方法依赖的package包/类
public void delete()
{
    FileUtils.delete(lockfile);
}