Examples with DataInputByteBuffer org.apache.hadoop.io.DataInputByteBuffer used on opensource projects

Example 21 with DataInputByteBuffer

use of org.apache.hadoop.io.DataInputByteBuffer in project hadoop by apache.

the class YarnServerSecurityUtils method parseCredentials.

/**
   * Parses the container launch context and returns a Credential instance that
   * contains all the tokens from the launch context. 
   * @param launchContext
   * @return the credential instance
   * @throws IOException
   */
public static Credentials parseCredentials(ContainerLaunchContext launchContext) throws IOException {
    Credentials credentials = new Credentials();
    ByteBuffer tokens = launchContext.getTokens();
    if (tokens != null) {
        DataInputByteBuffer buf = new DataInputByteBuffer();
        tokens.rewind();
        buf.reset(tokens);
        credentials.readTokenStorageStream(buf);
        if (LOG.isDebugEnabled()) {
            for (Token<? extends TokenIdentifier> tk : credentials.getAllTokens()) {
                LOG.debug(tk.getService() + " = " + tk.toString());
            }
        }
    }
    return credentials;
}