Utils.java 文件源码

public static void setTokensFor(ContainerLaunchContext amContainer, List<Path> paths, Configuration conf) throws IOException {
    Credentials credentials = new Credentials();
    // for HDFS
    TokenCache.obtainTokensForNamenodes(credentials, paths.toArray(new Path[0]), conf);
    // for HBase
    obtainTokenForHBase(credentials, conf);
    // for user
    UserGroupInformation currUsr = UserGroupInformation.getCurrentUser();

    Collection<Token<? extends TokenIdentifier>> usrTok = currUsr.getTokens();
    for (Token<? extends TokenIdentifier> token : usrTok) {
        final Text id = new Text(token.getIdentifier());
        LOG.info("Adding user token " + id + " with " + token);
        credentials.addToken(id, token);
    }
    try (DataOutputBuffer dob = new DataOutputBuffer()) {
        credentials.writeTokenStorageToStream(dob);

        if (LOG.isDebugEnabled()) {
            LOG.debug("Wrote tokens. Credentials buffer length: " + dob.getLength());
        }

        ByteBuffer securityTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());
        amContainer.setTokens(securityTokens);
    }
}