Examples with NoFlushOutputStream org.apache.accumulo.core.security.crypto.NoFlushOutputStream used on opensource projects

Example 1 with NoFlushOutputStream

use of org.apache.accumulo.core.security.crypto.NoFlushOutputStream in project accumulo by apache.

the class DfsLogger method open.

/**
 * Opens a Write-Ahead Log file and writes the necessary header information and OPEN entry to the file. The file is ready to be used for ingest if this method
 * returns successfully. If an exception is thrown from this method, it is the callers responsibility to ensure that {@link #close()} is called to prevent
 * leaking the file handle and/or syncing thread.
 *
 * @param address
 *          The address of the host using this WAL
 */
public synchronized void open(String address) throws IOException {
    String filename = UUID.randomUUID().toString();
    log.debug("Address is {}", address);
    String logger = Joiner.on("+").join(address.split(":"));
    log.debug("DfsLogger.open() begin");
    VolumeManager fs = conf.getFileSystem();
    VolumeChooserEnvironment chooserEnv = new VolumeChooserEnvironment(ChooserScope.LOGGER);
    logPath = fs.choose(chooserEnv, ServerConstants.getBaseUris()) + Path.SEPARATOR + ServerConstants.WAL_DIR + Path.SEPARATOR + logger + Path.SEPARATOR + filename;
    metaReference = toString();
    LoggerOperation op = null;
    try {
        short replication = (short) conf.getConfiguration().getCount(Property.TSERV_WAL_REPLICATION);
        if (replication == 0)
            replication = fs.getDefaultReplication(new Path(logPath));
        long blockSize = getWalBlockSize(conf.getConfiguration());
        if (conf.getConfiguration().getBoolean(Property.TSERV_WAL_SYNC))
            logFile = fs.createSyncable(new Path(logPath), 0, replication, blockSize);
        else
            logFile = fs.create(new Path(logPath), true, 0, replication, blockSize);
        sync = logFile.getClass().getMethod("hsync");
        flush = logFile.getClass().getMethod("hflush");
        // Initialize the crypto operations.
        org.apache.accumulo.core.security.crypto.CryptoModule cryptoModule = org.apache.accumulo.core.security.crypto.CryptoModuleFactory.getCryptoModule(conf.getConfiguration().get(Property.CRYPTO_MODULE_CLASS));
        // Initialize the log file with a header and the crypto params used to set up this log file.
        logFile.write(LOG_FILE_HEADER_V3.getBytes(UTF_8));
        CryptoModuleParameters params = CryptoModuleFactory.createParamsObjectFromAccumuloConfiguration(conf.getConfiguration());
        // Immediately update to the correct cipher. Doing this here keeps the CryptoModule independent of the writers using it
        if (params.getAllOptions().get(Property.CRYPTO_WAL_CIPHER_SUITE.getKey()) != null && !params.getAllOptions().get(Property.CRYPTO_WAL_CIPHER_SUITE.getKey()).equals("")) {
            params.setCipherSuite(params.getAllOptions().get(Property.CRYPTO_WAL_CIPHER_SUITE.getKey()));
        }
        NoFlushOutputStream nfos = new NoFlushOutputStream(logFile);
        params.setPlaintextOutputStream(nfos);
        // In order to bootstrap the reading of this file later, we have to record the CryptoModule that was used to encipher it here,
        // so that that crypto module can re-read its own parameters.
        logFile.writeUTF(conf.getConfiguration().get(Property.CRYPTO_MODULE_CLASS));
        params = cryptoModule.getEncryptingOutputStream(params);
        OutputStream encipheringOutputStream = params.getEncryptedOutputStream();
        // another data OutputStream.
        if (encipheringOutputStream == nfos) {
            log.debug("No enciphering, using raw output stream");
            encryptingLogFile = nfos;
        } else {
            log.debug("Enciphering found, wrapping in DataOutputStream");
            encryptingLogFile = new DataOutputStream(encipheringOutputStream);
        }
        LogFileKey key = new LogFileKey();
        key.event = OPEN;
        key.tserverSession = filename;
        key.filename = filename;
        op = logFileData(Collections.singletonList(new Pair<>(key, EMPTY)), Durability.SYNC);
    } catch (Exception ex) {
        if (logFile != null)
            logFile.close();
        logFile = null;
        encryptingLogFile = null;
        throw new IOException(ex);
    }
    syncThread = new Daemon(new LoggingRunnable(log, new LogSyncingTask()));
    syncThread.setName("Accumulo WALog thread " + toString());
    syncThread.start();
    op.await();
    log.debug("Got new write-ahead log: {}", this);
}