Java FileSystem.getUri方法代碼示例

import org.apache.hadoop.fs.FileSystem; //導入方法依賴的package包/類
/**
 * 此方法用於獲取文件的 Uri
 *
 * @param fileSystemInfo
 *            文件係統信息
 * @return Uri
 */
public static URI getUri(FileSystemInfo fileSystemInfo) {
	FileSystem fs = getFileSystem(fileSystemInfo);
	try {
		return fs.getUri();
	} finally {
		closeFileSystem(fs);
	}
}
 

import org.apache.hadoop.fs.FileSystem; //導入方法依賴的package包/類
private boolean compareFs(FileSystem srcFs, FileSystem destFs) {
  URI srcUri = srcFs.getUri();
  URI dstUri = destFs.getUri();
  if (srcUri.getScheme() == null) {
    return false;
  }
  if (!srcUri.getScheme().equals(dstUri.getScheme())) {
    return false;
  }
  String srcHost = srcUri.getHost();
  String dstHost = dstUri.getHost();
  if ((srcHost != null) && (dstHost != null)) {
    try {
      srcHost = InetAddress.getByName(srcHost).getCanonicalHostName();
      dstHost = InetAddress.getByName(dstHost).getCanonicalHostName();
    } catch (UnknownHostException ue) {
      return false;
    }
    if (!srcHost.equals(dstHost)) {
      return false;
    }
  } else if (srcHost == null && dstHost != null) {
    return false;
  } else if (srcHost != null && dstHost == null) {
    return false;
  }
  // check for ports
  if (srcUri.getPort() != dstUri.getPort()) {
    return false;
  }
  return true;
}
 

import org.apache.hadoop.fs.FileSystem; //導入方法依賴的package包/類
static DistributedFileSystem getDFS(Configuration conf)
    throws IOException {
  FileSystem fs = FileSystem.get(conf);
  if (!(fs instanceof DistributedFileSystem)) {
    throw new IllegalArgumentException("FileSystem " + fs.getUri() +
        " is not an HDFS file system");
  }
  return (DistributedFileSystem)fs;
}
 

import org.apache.hadoop.fs.FileSystem; //導入方法依賴的package包/類
/** Constructor */
public DFSAdminCommand(FileSystem fs) {
  super(fs.getConf());
  if (!(fs instanceof DistributedFileSystem)) {
    throw new IllegalArgumentException("FileSystem " + fs.getUri() + 
        " is not an HDFS file system");
  }
  this.dfs = (DistributedFileSystem)fs;
}
 

import org.apache.hadoop.fs.FileSystem; //導入方法依賴的package包/類
protected DistributedFileSystem getDFS() throws IOException {
  FileSystem fs = getFS();
  if (!(fs instanceof DistributedFileSystem)) {
    throw new IllegalArgumentException("FileSystem " + fs.getUri() + 
    " is not an HDFS file system");
  }
  return (DistributedFileSystem)fs;
}
 

import org.apache.hadoop.fs.FileSystem; //導入方法依賴的package包/類
/**
 * Determines if a file system supports ACLs by running a canary getAclStatus
 * request on the file system root.  This method is used before distcp job
 * submission to fail fast if the user requested preserving ACLs, but the file
 * system cannot support ACLs.
 *
 * @param fs FileSystem to check
 * @throws AclsNotSupportedException if fs does not support ACLs
 */
public static void checkFileSystemAclSupport(FileSystem fs)
    throws AclsNotSupportedException {
  try {
    fs.getAclStatus(new Path(Path.SEPARATOR));
  } catch (Exception e) {
    throw new AclsNotSupportedException("ACLs not supported for file system: "
      + fs.getUri());
  }
}
 

import org.apache.hadoop.fs.FileSystem; //導入方法依賴的package包/類
/**
 * Determines if a file system supports XAttrs by running a getXAttrs request
 * on the file system root. This method is used before distcp job submission
 * to fail fast if the user requested preserving XAttrs, but the file system
 * cannot support XAttrs.
 * 
 * @param fs FileSystem to check
 * @throws XAttrsNotSupportedException if fs does not support XAttrs
 */
public static void checkFileSystemXAttrSupport(FileSystem fs)
    throws XAttrsNotSupportedException {
  try {
    fs.getXAttrs(new Path(Path.SEPARATOR));
  } catch (Exception e) {
    throw new XAttrsNotSupportedException("XAttrs not supported for file system: "
      + fs.getUri());
  }
}
 

import org.apache.hadoop.fs.FileSystem; //導入方法依賴的package包/類
public static boolean compareFs(FileSystem srcFs, FileSystem destFs) {
  URI srcUri = srcFs.getUri();
  URI dstUri = destFs.getUri();
  if (srcUri.getScheme() == null) {
    return false;
  }
  if (!srcUri.getScheme().equals(dstUri.getScheme())) {
    return false;
  }
  String srcHost = srcUri.getHost();
  String dstHost = dstUri.getHost();
  if ((srcHost != null) && (dstHost != null)) {
    try {
      srcHost = InetAddress.getByName(srcHost).getCanonicalHostName();
      dstHost = InetAddress.getByName(dstHost).getCanonicalHostName();
    } catch(UnknownHostException ue) {
      if (LOG.isDebugEnabled())
        LOG.debug("Could not compare file-systems. Unknown host: ", ue);
      return false;
    }
    if (!srcHost.equals(dstHost)) {
      return false;
    }
  }
  else if (srcHost == null && dstHost != null) {
    return false;
  }
  else if (srcHost != null) {
    return false;
  }

  //check for ports

  return srcUri.getPort() == dstUri.getPort();
}
 

import org.apache.hadoop.fs.FileSystem; //導入方法依賴的package包/類
private void assertFsSameUri(FileSystem sourceFs, FileSystem targetFs) {
  Path source = new Path(sourceFs.getUri());
  Path target = new Path(targetFs.getUri());
  assertEquals(source, target);
}