Java S3Object.getMetadata方法代码示例

import org.jets3t.service.model.S3Object; //导入方法依赖的package包/类
private void checkMetadata(S3Object object) throws S3FileSystemException,
    S3ServiceException {
  
  String name = (String) object.getMetadata(FILE_SYSTEM_NAME);
  if (!FILE_SYSTEM_VALUE.equals(name)) {
    throw new S3FileSystemException("Not a Hadoop S3 file.");
  }
  String type = (String) object.getMetadata(FILE_SYSTEM_TYPE_NAME);
  if (!FILE_SYSTEM_TYPE_VALUE.equals(type)) {
    throw new S3FileSystemException("Not a block file.");
  }
  String dataVersion = (String) object.getMetadata(FILE_SYSTEM_VERSION_NAME);
  if (!FILE_SYSTEM_VERSION_VALUE.equals(dataVersion)) {
    throw new VersionMismatchException(FILE_SYSTEM_VERSION_VALUE,
        dataVersion);
  }
}
 

import org.jets3t.service.model.S3Object; //导入方法依赖的package包/类
@Override
public int run(String[] args) throws Exception {
  
  if (args.length == 0) {
    System.err.println("Usage: MigrationTool <S3 file system URI>");
    System.err.println("\t<S3 file system URI>\tfilesystem to migrate");
    ToolRunner.printGenericCommandUsage(System.err);
    return -1;
  }
  
  URI uri = URI.create(args[0]);
  
  initialize(uri);
  
  FileSystemStore newStore = new Jets3tFileSystemStore();
  newStore.initialize(uri, getConf());
  
  if (get("%2F") != null) { 
    System.err.println("Current version number is [unversioned].");
    System.err.println("Target version number is " +
        newStore.getVersion() + ".");
    Store oldStore = new UnversionedStore();
    migrate(oldStore, newStore);
    return 0;
  } else {
    S3Object root = get("/");
    if (root != null) {
      String version = (String) root.getMetadata("fs-version");
      if (version == null) {
        System.err.println("Can't detect version - exiting.");
      } else {
        String newVersion = newStore.getVersion();
        System.err.println("Current version number is " + version + ".");
        System.err.println("Target version number is " + newVersion + ".");
        if (version.equals(newStore.getVersion())) {
          System.err.println("No migration required.");
          return 0;
        }
        // use version number to create Store
        //Store oldStore = ... 
        //migrate(oldStore, newStore);
        System.err.println("Not currently implemented.");
        return 0;
      }
    }
    System.err.println("Can't detect version - exiting.");
    return 0;
  }
  
}
 

import org.jets3t.service.model.S3Object; //导入方法依赖的package包/类
public int run(String[] args) throws Exception {
  
  if (args.length == 0) {
    System.err.println("Usage: MigrationTool <S3 file system URI>");
    System.err.println("\t<S3 file system URI>\tfilesystem to migrate");
    ToolRunner.printGenericCommandUsage(System.err);
    return -1;
  }
  
  URI uri = URI.create(args[0]);
  
  initialize(uri);
  
  FileSystemStore newStore = new Jets3tFileSystemStore();
  newStore.initialize(uri, getConf());
  
  if (get("%2F") != null) { 
    System.err.println("Current version number is [unversioned].");
    System.err.println("Target version number is " +
        newStore.getVersion() + ".");
    Store oldStore = new UnversionedStore();
    migrate(oldStore, newStore);
    return 0;
  } else {
    S3Object root = get("/");
    if (root != null) {
      String version = (String) root.getMetadata("fs-version");
      if (version == null) {
        System.err.println("Can't detect version - exiting.");
      } else {
        String newVersion = newStore.getVersion();
        System.err.println("Current version number is " + version + ".");
        System.err.println("Target version number is " + newVersion + ".");
        if (version.equals(newStore.getVersion())) {
          System.err.println("No migration required.");
          return 0;
        }
        // use version number to create Store
        //Store oldStore = ... 
        //migrate(oldStore, newStore);
        System.err.println("Not currently implemented.");
        return 0;
      }
    }
    System.err.println("Can't detect version - exiting.");
    return 0;
  }
  
}
 

import org.jets3t.service.model.S3Object; //导入方法依赖的package包/类
/**
 * Creates a download package representing an S3Object that will be downloaded, and the
 * target file the downloaded data will be written to.
 * <p>
 * Downloaded data may be transformed if the S3Object is encrypted or gzipped and the
 * appropriate options are set.
 *
 * @param object
 * the object
 * @param fileTarget
 * the file to which downloaded (and possibly transformed) data will be written.
 * @param automaticUnzip
 * if true, gzipped objects will be decrypted on-the-fly as they are downloaded.
 * @param automaticDecrypt
 * if true, encrypted files will be decrypted on-the-fly as they are downloaded (in which
 * case the encryptionPassword must be correct)
 * @param encryptionPassword
 * the password required to decrypt encrypted objects.
 *
 * @deprecated 0.8.0 use
 * {@link #createPackageForDownload(StorageObject, File, boolean, boolean, String)} instead.
 *
 * @return
 * a download package representing an S3Object and a taret file for the object's data.
 * @throws Exception
 */
@Deprecated
public static org.jets3t.service.multithread.DownloadPackage createPackageForDownload(
    S3Object object, File fileTarget, boolean automaticUnzip, boolean automaticDecrypt,
    String encryptionPassword) throws Exception
{
    // Recognize directory place-holder objects and ignore them
    if (object.isDirectoryPlaceholder()) {
        return null;
    }
    else {
        boolean isZipped = false;
        EncryptionUtil encryptionUtil = null;

        if (automaticUnzip &&
            ("gzip".equalsIgnoreCase(object.getContentEncoding())
            || object.containsMetadata(Constants.METADATA_JETS3T_COMPRESSED)))
        {
            // Object data is gzipped.
            isZipped = true;
        }
        if (automaticDecrypt
            && object.containsMetadata(Constants.METADATA_JETS3T_CRYPTO_ALGORITHM))
        {
            // Object is encrypted.
            if (encryptionPassword == null) {
                throw new ServiceException(
                    "One or more objects are encrypted, and cannot be downloaded unless "
                    + " the encyption password is provided");
            }

            String algorithm = (String) object.getMetadata(
                Constants.METADATA_JETS3T_CRYPTO_ALGORITHM);
            String version = (String) object.getMetadata(
                Constants.METADATA_JETS3T_CRYPTO_VERSION);
            if (version == null) {
                version = EncryptionUtil.DEFAULT_VERSION;
            }
            encryptionUtil = new EncryptionUtil(encryptionPassword, algorithm, version);
        }

        return new org.jets3t.service.multithread.DownloadPackage(
            object, fileTarget, isZipped, encryptionUtil);
    }
}