本文整理了Java中org.apache.jena.tdb.base.file.Location.isMem()方法的一些代码示例，展示了Location.isMem()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Location.isMem()方法的具体详情如下：
包路径：org.apache.jena.tdb.base.file.Location
类名称：Location
方法名：isMem

Location.isMem介绍

暂无

代码示例

代码示例来源：origin: apache/jena

/**
 * Gets whether the location is lockable i.e. is it an on-disk location
 * where we can use a lock file to prevent multi-process access and the
 * potential data corruption that ensues
 * 
 * @return True if the location is lockable
 */
public boolean canLock() {
  return !location.isMem();
}

代码示例来源：origin: apache/jena

/** Test whether a location already has a TDB database or whether a call to TDBFactory 
 * will cause a new, fresh TDB database to be created (pragmatic tests).
 * The directory may be empty, or not exist.
 * Existing databases return "true".  
 */
public static boolean inUseLocation(Location location) {
  if ( location.isMemUnique() )
    return false ;
  if ( location.isMem() )
    return StoreConnection.getExisting(location) != null ;
  String dirname = location.getDirectoryPath() ;
  File d = new File(dirname) ;
  
  if ( ! d.exists() )
    // TDB autocreates directories one level.
    return ! FileOps.exists(d.getParent()) ;
  return ! TDBInternal.isNewDatabaseArea(location) ;
}

代码示例来源：origin: apache/jena

public boolean isMem()
{
  return location.isMem() ;
}

代码示例来源：origin: apache/jena

public boolean exists(String ext)
{
  if ( location.isMem() )
    return true ;
  String fn = filename(ext) ;
  File f = new File(fn) ;
  if ( f.isDirectory() )
    log.warn("File clashes with a directory") ;
  return f.exists() && f.isFile() ;
}

代码示例来源：origin: apache/jena

/**
 * Gets whether the location is currently locked
 * 
 * @return boolean
 */
public boolean isLocked() {
  // Memory locations are never considered locked
  if (location.isMem())
    return false;
  return getOwner() != NO_OWNER;
}

代码示例来源：origin: apache/jena

private void ensure(String dirname) {
  if ( isMem() )
    return ;
  File file = new File(dirname) ;
  if ( file.exists() && !file.isDirectory() )
    throw new FileException("Existing file: " + file.getAbsolutePath()) ;
  if ( !file.exists() )
    file.mkdir() ;
}

代码示例来源：origin: apache/jena

private String fixupName(String fsName) {
  if (  isMem() )
    return fsName ;
  File file = new File(fsName) ;
  try {
    fsName = file.getCanonicalPath() ;
  } catch (IOException ex) {
    throw new FileException("Failed to get canoncial path: " + file.getAbsolutePath(), ex) ;
  }
  if ( !fsName.endsWith(File.separator) && !fsName.endsWith(pathSeparator) )
    fsName = fsName + pathSeparator ;
  return fsName ;
}

代码示例来源：origin: apache/jena

/** Look at a directory and see if it is a new area */
public static boolean isNewDatabaseArea(Location location) {
  StoreConnection sConn = StoreConnection.getExisting(location) ;
  if ( sConn != null )
    // Already has a StoreConnection
    return false ;
  if ( location.isMem() )
    return true ;
  File d = new File(location.getDirectoryPath()) ;
  if ( !d.exists() )
    return true ;
  FileFilter ff = fileFilterNewDB ;
  File[] entries = d.listFiles(ff) ;
  return entries.length == 0 ;
}

代码示例来源：origin: org.seaborne.rdf-delta/rdf-delta-base

/** Convert a {@link Location} to a {@link Path}. */
public static Path asPath(Location location) {
  if ( location.isMem() )
    throw new RuntimeIOException("Location is a memory location: "+location);
  return Paths.get(location.getDirectoryPath());
}

代码示例来源：origin: apache/jena

public static boolean exists(Location location)
{
  if ( location.isMem() ) return false ;
  return FileOps.exists(journalFilename(location)) ;
}

代码示例来源：origin: apache/jena

/**
 * Read from a file if possible.
 * Return null for memory locations, file not found or syntax errors. 
 */
public static StoreParams read(Location location) {
  if ( location.isMem() )
    return null ;
  return read(location.getPath(TDB_CONFIG_FILE)) ;
}

代码示例来源：origin: apache/jena

/**
 * Gets whether the lock is owned by the current process
 * 
 * @return True if the location is locked and owned by the process, false
 *         otherwise
 */
public boolean isOwned() {
  // Memory locations are never considered locked
  if (location.isMem())
    return false;
  int owner = getOwner();
  if (owner == NO_OWNER)
    return false;
  return owner == ProcessUtils.getPid(NO_OWNER);
}

代码示例来源：origin: apache/jena

private static void checkLocation(Location location) { 
  if ( location.isMem() )
    return ;
  String dirname = location.getDirectoryPath() ;
  File dir = new File(dirname) ;
  // File location.
  if ( ! dir.exists() )
    error(log, "Does not exist: "+dirname) ;
  if ( ! dir.isDirectory() )
    error(log, "Not a directory: "+dirname) ;
  if ( ! dir.canRead() )
    error(log, "Directory not readable: "+dirname) ;
  if ( ! dir.canWrite() )
    error(log, "Directory not writeable: "+dirname) ;
}

代码示例来源：origin: org.seaborne.rdf-delta/rdf-delta-client

private void init() {
  if ( INITIALIZED ) {
    checkInit(stateLocation);
    return;
  }
  synchronized(zoneLock) {
    if ( INITIALIZED ) {
      checkInit(stateLocation);
      return;
    }
    INITIALIZED = true;
    if ( stateLocation == null || stateLocation.isMem() ) {
      // In-memory only.
      stateArea = null;
      return ;
    }
    stateArea = IOX.asPath(stateLocation);
    List<Path> x = scanForDataState(stateLocation);
    x.forEach(p->LOG.info("Connection : "+p));
    x.forEach(p->fromOnDiskState(p));
  }
}

代码示例来源：origin: apache/jena

public static Journal create(Location location)
{
  BufferChannel chan ;
  String channelName = journalFilename(location) ;
  if ( location.isMem() )
    chan = BufferChannelMem.create(channelName) ;
  else
    chan = BufferChannelFile.create(channelName) ;
  return new Journal(chan) ;
}

代码示例来源：origin: apache/jena

public /* for testing */ static void init$() {
    if ( initialized )
      return ;
    initialized = true ;
    
    if ( location == null )
      location = Location.create(FusekiWebapp.dirSystemDatabase.toString()) ;
    
    if ( ! location.isMem() )
      FileOps.ensureDir(location.getDirectoryPath()) ;
    
    // Force it into the store connection as a low footprint
    if ( StoreConnection.getExisting(location) != null )
      Fuseki.serverLog.warn("System database already in the StoreConnection cache") ;
    StoreConnection.make(location, systemDatabaseParams) ;
    
    dataset = TDBFactory.createDataset(location) ;
    dsg     = (DatasetGraphTransaction)(dataset.asDatasetGraph()) ;
    dsg.getContext().set(TDB.symUnionDefaultGraph, false) ;
  }
}

代码示例来源：origin: org.apache.jena/jena-fuseki-webapp

public /* for testing */ static void init$() {
    if ( initialized )
      return ;
    initialized = true ;
    
    if ( location == null )
      location = Location.create(FusekiWebapp.dirSystemDatabase.toString()) ;
    
    if ( ! location.isMem() )
      FileOps.ensureDir(location.getDirectoryPath()) ;
    
    // Force it into the store connection as a low footprint
    if ( StoreConnection.getExisting(location) != null )
      Fuseki.serverLog.warn("System database already in the StoreConnection cache") ;
    StoreConnection.make(location, systemDatabaseParams) ;
    
    dataset = TDBFactory.createDataset(location) ;
    dsg     = (DatasetGraphTransaction)(dataset.asDatasetGraph()) ;
    dsg.getContext().set(TDB.symUnionDefaultGraph, false) ;
  }
}

代码示例来源：origin: apache/jena

@Override
final public void finishBulk() {
  loaderTriples.loadDataFinish() ;
  loaderTriples.loadIndexStart() ;
  loaderTriples.loadIndexFinish() ;
  loaderTriples.loadFinish() ;
  if ( !dsg.getLocation().isMem() && startedEmpty && stats != null ) {
    String filename = dsg.getLocation().getPath(Names.optStats) ;
    Stats.write(filename, stats.results()) ;
  }
  forceSync(dsg) ;
}

代码示例来源：origin: apache/jena

/** Recover a base storage DatasetGraph */
public static void recovery(DatasetGraphTDB dsg)
{
  if ( dsg.getLocation().isMem() )
    return ;
  
  // Do we need to recover?
  Journal journal = findJournal(dsg) ;
  if ( journal == null || journal.isEmpty() )
    return ;
  
  recoverFromJournal(dsg.getConfig(), journal) ;
  
  journal.close();
  // Recovery complete.  Tidy up.  Node journal files have already been handled.
  if ( journal.getFilename() != null )  
  {
    if ( FileOps.exists(journal.getFilename()) )
      FileOps.delete(journal.getFilename()) ;
  }
}

代码示例来源：origin: apache/jena

@Override
public void finishBulk() {
  loaderTriples.loadDataFinish() ;
  loaderQuads.loadDataFinish() ;
  loaderTriples.loadIndexStart() ;
  loaderQuads.loadIndexStart() ;
  loaderTriples.loadIndexFinish() ;
  loaderQuads.loadIndexFinish() ;
  loaderTriples.loadFinish() ;
  loaderQuads.loadFinish() ;
  if ( !dsg.getLocation().isMem() && startedEmpty && stats != null ) {
    String filename = dsg.getLocation().getPath(Names.optStats) ;
    Stats.write(filename, stats.results()) ;
  }
  forceSync(dsg) ;
}