Examples of org.apache.lucene.store.FSDirectory

org.apache.lucene.store.FSDirectory

sun.com/bugdatabase/view_bug.do?bug_id=6265734">Sun JRE bug this is a poor choice for Windows, but on all other platforms this is the preferred choice. Applications using {@link Thread#interrupt()} or{@link Future#cancel(boolean)} should use{@link SimpleFSDirectory} instead. See {@link NIOFSDirectory} java docfor details.

{@link MMapDirectory} uses memory-mapped IO whenreading. This is a good choice if you have plenty of virtual memory relative to your index size, eg if you are running on a 64 bit JRE, or you are running on a 32 bit JRE but your index sizes are small enough to fit into the virtual memory space. Java has currently the limitation of not being able to unmap files from user code. The files are unmapped, when GC releases the byte buffers. Due to this bug in Sun's JRE, MMapDirectory's {@link IndexInput#close}is unable to close the underlying OS file handle. Only when GC finally collects the underlying objects, which could be quite some time later, will the file handle be closed. This will consume additional transient disk usage: on Windows, attempts to delete or overwrite the files will result in an exception; on other platforms, which typically have a "delete on last close" semantics, while such operations will succeed, the bytes are still consuming space on disk. For many applications this limitation is not a problem (e.g. if you have plenty of disk space, and you don't rely on overwriting files on Windows) but it's still an important limitation to be aware of. This class supplies a (possibly dangerous) workaround mentioned in the bug report, which may fail on non-Sun JVMs. Applications using {@link Thread#interrupt()} or{@link Future#cancel(boolean)} should use{@link SimpleFSDirectory} instead. See {@link MMapDirectory}java doc for details.

The locking implementation is by default {@link NativeFSLockFactory}, but can be changed by passing in a custom {@link LockFactory} instance. @see Directory

        }


        File cachedir = null;
        if(dir instanceof FSDirectory)
        {
          FSDirectory d=(FSDirectory)dir;
          cachedir=new File(d.getDirectory(), "cacheField");
        }else{
          cachedir=new File(f, "cacheField");
        }

  }


  private void initSourceReader() {
    if (sourceLocation != null) {
      try {
        FSDirectory luceneIndexDir = FSDirectory.open(new File(sourceLocation));
        this.reader = IndexReader.open(luceneIndexDir);
      } catch (IOException e) {
        throw new RuntimeException(e);
      }
    }

      // make sure that all index files have been read or are kept open
      // so that if an index update removes them we'll still have them
      String filename=IndexFileNames.segmentFileName(segment, IndexFileNames.FREQ_EXTENSION);
      if(cfsDir instanceof FSDirectory)
      {
        FSDirectory dddir=(FSDirectory)cfsDir;
        freqStream = new BlockBufferInput.KeyInput(cfsDir.openInput(filename, readBufferSize), cfsDir,filename,cfsDir.getP());
        if (fieldInfos.hasProx()) {
      String fname=IndexFileNames.segmentFileName(segment, IndexFileNames.PROX_EXTENSION);
          proxStream = BlockBufferInput.MaybeInstance(cfsDir.openInput(fname, readBufferSize), cfsDir,fname,cfsDir.getP());
        } else {

        m1.d.deleteFile(s);
      }
    }
    if(m1.d instanceof FSDirectory)
    {
      FSDirectory fd=(FSDirectory)m1.d;
            FileUtils.forceDelete(fd.getDirectory());
    }
    
    if(m1.d instanceof FileSystemDirectory)
    {
      FileSystemDirectory fd=(FileSystemDirectory)m1.d;

        m1.d.deleteFile(s);
      }
    }
    if(m1.d instanceof FSDirectory)
    {
      FSDirectory fd=(FSDirectory)m1.d;
            FileUtils.forceDelete(fd.getDirectory());
    }
    
    if(m1.d instanceof FileSystemDirectory)
    {
      FileSystemDirectory fd=(FileSystemDirectory)m1.d;

        if (s1.trim().length() > 0) {
          File f = new File(s1);
          if (!f.exists()) {
            continue;
          }
          FSDirectory d = LinkFSDirectory.open(f,true);
          DirectoryInfo info = new DirectoryInfo();
          info.d = d;
          info.tp = DirectoryInfo.DirTpe.file;
          this.diskDirector.put(s1, info);
          SolrCore.log.info(">>>>> add links "+ s1);

            File f=new File(s1);
            if(!f.exists())
            {
              continue;
            }
            FSDirectory d=LinkFSDirectory.open(f);
            DirectoryInfo info=new DirectoryInfo();
            info.d=d;
            info.tp=DirectoryInfo.DirTpe.file;
            diskDirector.put(s1, info);
            SolrCore.log.info(">>>>>LinkFSDirectory readOnlyOpen add links "+s1);

        if (s1.trim().length() > 0) {
          File f = new File(s1);
          if (!f.exists()) {
            continue;
          }
          FSDirectory d = LinkFSDirectory.open(f,true);
          DirectoryInfo info = new DirectoryInfo();
          info.d = d;
          info.tp = DirectoryInfo.DirTpe.file;
          this.diskDirector.put(s1, info);
          SolrCore.log.info(">>>>> add links "+ s1);

            File f=new File(s1);
            if(!f.exists())
            {
              continue;
            }
            FSDirectory d=LinkFSDirectory.open(f);
            DirectoryInfo info=new DirectoryInfo();
            info.d=d;
            info.tp=DirectoryInfo.DirTpe.file;
            diskDirector.put(s1, info);
            SolrCore.log.info(">>>>>LinkFSDirectory readOnlyOpen add links "+s1);

      sb.append("commit{");


      Directory dir = commit.getDirectory();


      if (dir instanceof FSDirectory) {
        FSDirectory fsd = (FSDirectory) dir;
        sb.append("dir=").append(fsd.getDirectory());
      }else if (dir instanceof FileSystemDirectory) {
        FileSystemDirectory fsd = (FileSystemDirectory) dir;
          sb.append("dir=").append(fsd.directory.toString());
        }else {
        sb.append("dir=").append(dir);

Related Classes of org.apache.lucene.store.FSDirectory

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