/**
   * Joins array elements to string.
   *
   * @param arr Array.
   * @return String.
   */
  @Nullable
  public static String compactArray(Object[] arr) {
    if (arr == null || arr.length == 0) return null;

    String sep = ", ";

    StringBuilder sb = new StringBuilder();

    for (Object s : arr) sb.append(s).append(sep);

    if (sb.length() > 0) sb.setLength(sb.length() - sep.length());

    return U.compact(sb.toString());
  }
 /**
  * Log task mapped.
  *
  * @param log Logger.
  * @param clazz Task class.
  * @param nodes Mapped nodes.
  */
 public static void logMapped(
     @Nullable IgniteLogger log, Class<?> clazz, Collection<ClusterNode> nodes) {
   log0(
       log,
       U.currentTimeMillis(),
       String.format("[%s]: MAPPED: %s", clazz.getSimpleName(), U.toShortString(nodes)));
 }
Example #3
0
  /**
   * Decodes value from a given byte array to the object according to the flags given.
   *
   * @param flags Flags.
   * @param bytes Byte array to decode.
   * @return Decoded value.
   * @throws GridException If deserialization failed.
   */
  private Object decodeObj(short flags, byte[] bytes) throws GridException {
    assert bytes != null;

    if ((flags & SERIALIZED_FLAG) != 0)
      return jdkMarshaller.unmarshal(new ByteArrayInputStream(bytes), null);

    int masked = flags & 0xff00;

    switch (masked) {
      case BOOLEAN_FLAG:
        return bytes[0] == '1';
      case INT_FLAG:
        return U.bytesToInt(bytes, 0);
      case LONG_FLAG:
        return U.bytesToLong(bytes, 0);
      case DATE_FLAG:
        return new Date(U.bytesToLong(bytes, 0));
      case BYTE_FLAG:
        return bytes[0];
      case FLOAT_FLAG:
        return Float.intBitsToFloat(U.bytesToInt(bytes, 0));
      case DOUBLE_FLAG:
        return Double.longBitsToDouble(U.bytesToLong(bytes, 0));
      case BYTE_ARR_FLAG:
        return bytes;
      default:
        return new String(bytes);
    }
  }
Example #4
0
  /**
   * Encodes given object to a byte array and returns flags that describe the type of serialized
   * object.
   *
   * @param obj Object to serialize.
   * @param out Output stream to which object should be written.
   * @return Serialization flags.
   * @throws GridException If JDK serialization failed.
   */
  private int encodeObj(Object obj, ByteArrayOutputStream out) throws GridException {
    int flags = 0;

    byte[] data = null;

    if (obj instanceof String) {
      data = ((String) obj).getBytes();
    } else if (obj instanceof Boolean) {
      data = new byte[] {(byte) ((Boolean) obj ? '1' : '0')};

      flags |= BOOLEAN_FLAG;
    } else if (obj instanceof Integer) {
      data = U.intToBytes((Integer) obj);

      flags |= INT_FLAG;
    } else if (obj instanceof Long) {
      data = U.longToBytes((Long) obj);

      flags |= LONG_FLAG;
    } else if (obj instanceof Date) {
      data = U.longToBytes(((Date) obj).getTime());

      flags |= DATE_FLAG;
    } else if (obj instanceof Byte) {
      data = new byte[] {(Byte) obj};

      flags |= BYTE_FLAG;
    } else if (obj instanceof Float) {
      data = U.intToBytes(Float.floatToIntBits((Float) obj));

      flags |= FLOAT_FLAG;
    } else if (obj instanceof Double) {
      data = U.longToBytes(Double.doubleToLongBits((Double) obj));

      flags |= DOUBLE_FLAG;
    } else if (obj instanceof byte[]) {
      data = (byte[]) obj;

      flags |= BYTE_ARR_FLAG;
    } else {
      jdkMarshaller.marshal(obj, out);

      flags |= SERIALIZED_FLAG;
    }

    if (data != null) out.write(data, 0, data.length);

    return flags;
  }
  /** {@inheritDoc} */
  @Override
  public void finishUnmarshal(GridCacheSharedContext ctx, ClassLoader ldr)
      throws IgniteCheckedException {
    super.finishUnmarshal(ctx, ldr);

    if (writes != null) unmarshalTx(writes, false, ctx, ldr);

    if (reads != null) unmarshalTx(reads, false, ctx, ldr);

    if (grpLockKeyBytes != null && grpLockKey == null)
      grpLockKey = ctx.marshaller().unmarshal(grpLockKeyBytes, ldr);

    if (dhtVerKeys != null && dhtVers == null) {
      assert dhtVerVals != null;
      assert dhtVerKeys.size() == dhtVerVals.size();

      Iterator<IgniteTxKey> keyIt = dhtVerKeys.iterator();
      Iterator<GridCacheVersion> verIt = dhtVerVals.iterator();

      dhtVers = U.newHashMap(dhtVerKeys.size());

      while (keyIt.hasNext()) {
        IgniteTxKey key = keyIt.next();

        key.finishUnmarshal(ctx.cacheContext(key.cacheId()), ldr);

        dhtVers.put(key, verIt.next());
      }
    }

    if (txNodesBytes != null) txNodes = ctx.marshaller().unmarshal(txNodesBytes, ldr);
  }
  /**
   * Resolves host for REST TCP server using grid configuration.
   *
   * @param cfg Grid configuration.
   * @return REST host.
   * @throws IOException If failed to resolve REST host.
   */
  private InetAddress resolveRestTcpHost(GridConfiguration cfg) throws IOException {
    String host = cfg.getRestTcpHost();

    if (host == null) host = cfg.getLocalHost();

    return U.resolveLocalHost(host);
  }
  /**
   * Log finished.
   *
   * @param log Logger.
   * @param clazz Class.
   * @param start Start time.
   */
  public static void logFinish(@Nullable IgniteLogger log, Class<?> clazz, long start) {
    final long end = U.currentTimeMillis();

    log0(
        log,
        end,
        String.format(
            "[%s]: FINISHED, duration: %s", clazz.getSimpleName(), formatDuration(end - start)));
  }
  /**
   * Log message.
   *
   * @param log Logger.
   * @param msg Message to log.
   * @param clazz class.
   * @param start start time.
   * @return Time when message was logged.
   */
  public static long log(@Nullable IgniteLogger log, String msg, Class<?> clazz, long start) {
    final long end = U.currentTimeMillis();

    log0(
        log,
        end,
        String.format(
            "[%s]: %s, duration: %s", clazz.getSimpleName(), msg, formatDuration(end - start)));

    return end;
  }
  /**
   * Returns compact class host.
   *
   * @param obj Object to compact.
   * @return String.
   */
  @Nullable
  public static Object compactObject(Object obj) {
    if (obj == null) return null;

    if (obj instanceof Enum) return obj.toString();

    if (obj instanceof String || obj instanceof Boolean || obj instanceof Number) return obj;

    if (obj instanceof Collection) {
      Collection col = (Collection) obj;

      Object[] res = new Object[col.size()];

      int i = 0;

      for (Object elm : col) res[i++] = compactObject(elm);

      return res;
    }

    if (obj.getClass().isArray()) {
      Class<?> arrType = obj.getClass().getComponentType();

      if (arrType.isPrimitive()) {
        if (obj instanceof boolean[]) return Arrays.toString((boolean[]) obj);
        if (obj instanceof byte[]) return Arrays.toString((byte[]) obj);
        if (obj instanceof short[]) return Arrays.toString((short[]) obj);
        if (obj instanceof int[]) return Arrays.toString((int[]) obj);
        if (obj instanceof long[]) return Arrays.toString((long[]) obj);
        if (obj instanceof float[]) return Arrays.toString((float[]) obj);
        if (obj instanceof double[]) return Arrays.toString((double[]) obj);
      }

      Object[] arr = (Object[]) obj;

      int iMax = arr.length - 1;

      StringBuilder sb = new StringBuilder("[");

      for (int i = 0; i <= iMax; i++) {
        sb.append(compactObject(arr[i]));

        if (i != iMax) sb.append(", ");
      }

      sb.append("]");

      return sb.toString();
    }

    return U.compact(obj.getClass().getName());
  }
  /**
   * Run command in separated console.
   *
   * @param workFolder Work folder for command.
   * @param args A string array containing the program and its arguments.
   * @return Started process.
   * @throws IOException If failed to start process.
   */
  public static Process openInConsole(@Nullable File workFolder, String... args)
      throws IOException {
    String[] commands = args;

    String cmd = F.concat(Arrays.asList(args), " ");

    if (U.isWindows()) commands = F.asArray("cmd", "/c", String.format("start %s", cmd));

    if (U.isMacOs())
      commands =
          F.asArray(
              "osascript",
              "-e",
              String.format("tell application \"Terminal\" to do script \"%s\"", cmd));

    if (U.isUnix()) commands = F.asArray("xterm", "-sl", "1024", "-geometry", "200x50", "-e", cmd);

    ProcessBuilder pb = new ProcessBuilder(commands);

    if (workFolder != null) pb.directory(workFolder);

    return pb.start();
  }
  /**
   * Resolve IGFS profiler logs directory.
   *
   * @param igfs IGFS instance to resolve logs dir for.
   * @return {@link Path} to log dir or {@code null} if not found.
   * @throws IgniteCheckedException if failed to resolve.
   */
  public static Path resolveIgfsProfilerLogsDir(IgniteFileSystem igfs)
      throws IgniteCheckedException {
    String logsDir;

    if (igfs instanceof IgfsEx) logsDir = ((IgfsEx) igfs).clientLogDirectory();
    else if (igfs == null)
      throw new IgniteCheckedException(
          "Failed to get profiler log folder (IGFS instance not found)");
    else
      throw new IgniteCheckedException(
          "Failed to get profiler log folder (unexpected IGFS instance type)");

    URL logsDirUrl = U.resolveIgniteUrl(logsDir != null ? logsDir : DFLT_IGFS_LOG_DIR);

    return logsDirUrl != null ? new File(logsDirUrl.getPath()).toPath() : null;
  }
  /** {@inheritDoc} */
  @Override
  public void finishUnmarshal(GridCacheSharedContext ctx, ClassLoader ldr)
      throws IgniteCheckedException {
    super.finishUnmarshal(ctx, ldr);

    if (ownedValKeys != null && ownedVals == null) {
      ownedVals = U.newHashMap(ownedValKeys.size());

      assert ownedValKeys.size() == ownedValVals.size();

      Iterator<IgniteTxKey> keyIter = ownedValKeys.iterator();

      Iterator<CacheVersionedValue> valIter = ownedValVals.iterator();

      while (keyIter.hasNext()) {
        IgniteTxKey key = keyIter.next();

        GridCacheContext cctx = ctx.cacheContext(key.cacheId());

        CacheVersionedValue val = valIter.next();

        key.finishUnmarshal(cctx, ldr);

        val.finishUnmarshal(cctx, ldr);

        ownedVals.put(key, val);
      }
    }

    if (retVal != null && retVal.cacheId() != 0) {
      GridCacheContext cctx = ctx.cacheContext(retVal.cacheId());

      assert cctx != null : retVal.cacheId();

      retVal.finishUnmarshal(cctx, ldr);
    }

    if (filterFailedKeys != null) {
      for (IgniteTxKey key : filterFailedKeys) {
        GridCacheContext cctx = ctx.cacheContext(key.cacheId());

        key.finishUnmarshal(cctx, ldr);
      }
    }
  }
  /**
   * Read block from file.
   *
   * @param file - File to read.
   * @param off - Marker position in file to start read from if {@code -1} read last blockSz bytes.
   * @param blockSz - Maximum number of chars to read.
   * @param lastModified - File last modification time.
   * @return Read file block.
   * @throws IOException In case of error.
   */
  public static VisorFileBlock readBlock(File file, long off, int blockSz, long lastModified)
      throws IOException {
    RandomAccessFile raf = null;

    try {
      long fSz = file.length();
      long fLastModified = file.lastModified();

      long pos = off >= 0 ? off : Math.max(fSz - blockSz, 0);

      // Try read more that file length.
      if (fLastModified == lastModified && fSz != 0 && pos >= fSz)
        throw new IOException(
            "Trying to read file block with wrong offset: " + pos + " while file size: " + fSz);

      if (fSz == 0)
        return new VisorFileBlock(file.getPath(), pos, fLastModified, 0, false, EMPTY_FILE_BUF);
      else {
        int toRead = Math.min(blockSz, (int) (fSz - pos));

        byte[] buf = new byte[toRead];

        raf = new RandomAccessFile(file, "r");

        raf.seek(pos);

        int cntRead = raf.read(buf, 0, toRead);

        if (cntRead != toRead)
          throw new IOException(
              "Count of requested and actually read bytes does not match [cntRead="
                  + cntRead
                  + ", toRead="
                  + toRead
                  + ']');

        boolean zipped = buf.length > 512;

        return new VisorFileBlock(
            file.getPath(), pos, fSz, fLastModified, zipped, zipped ? zipBytes(buf) : buf);
      }
    } finally {
      U.close(raf, null);
    }
  }
  /**
   * Checks if address can be reached using one argument InetAddress.isReachable() version or ping
   * command if failed.
   *
   * @param addr Address to check.
   * @param reachTimeout Timeout for the check.
   * @return {@code True} if address is reachable.
   */
  public static boolean reachableByPing(InetAddress addr, int reachTimeout) {
    try {
      if (addr.isReachable(reachTimeout)) return true;

      String cmd = String.format("ping -%s 1 %s", U.isWindows() ? "n" : "c", addr.getHostAddress());

      Process myProc = Runtime.getRuntime().exec(cmd);

      myProc.waitFor();

      return myProc.exitValue() == 0;
    } catch (IOException ignore) {
      return false;
    } catch (InterruptedException ignored) {
      Thread.currentThread().interrupt();

      return false;
    }
  }
Example #15
0
  /**
   * Parses custom packet serialized by hessian marshaller.
   *
   * @param ses Session.
   * @param buf Buffer containing not parsed bytes.
   * @param state Parser state.
   * @return Parsed message.
   * @throws IOException If packet parsing or deserialization failed.
   */
  @Nullable
  private GridClientMessage parseCustomPacket(GridNioSession ses, ByteBuffer buf, ParserState state)
      throws IOException {
    assert state.packetType() == PacketType.GRIDGAIN;
    assert state.packet() == null;

    ByteArrayOutputStream tmp = state.buffer();

    int len = state.index();

    while (buf.remaining() > 0) {
      byte b = buf.get();

      if (len == 0) {
        tmp.write(b);

        if (tmp.size() == 4) {
          len = U.bytesToInt(tmp.toByteArray(), 0);

          tmp.reset();

          if (len == 0) return PING_MESSAGE;
          else if (len < 0)
            throw new IOException(
                "Failed to parse incoming packet (invalid packet length) [ses="
                    + ses
                    + ", len="
                    + len
                    + ']');

          state.index(len);
        }
      } else {
        tmp.write(b);

        if (tmp.size() == len) return marshaller.unmarshal(tmp.toByteArray());
      }
    }

    return null;
  }
  /**
   * Decode file charset.
   *
   * @param f File to process.
   * @return File charset.
   * @throws IOException in case of error.
   */
  public static Charset decode(File f) throws IOException {
    SortedMap<String, Charset> charsets = Charset.availableCharsets();

    String[] firstCharsets = {
      Charset.defaultCharset().name(), "US-ASCII", "UTF-8", "UTF-16BE", "UTF-16LE"
    };

    Collection<Charset> orderedCharsets = U.newLinkedHashSet(charsets.size());

    for (String c : firstCharsets)
      if (charsets.containsKey(c)) orderedCharsets.add(charsets.get(c));

    orderedCharsets.addAll(charsets.values());

    try (RandomAccessFile raf = new RandomAccessFile(f, "r")) {
      FileChannel ch = raf.getChannel();

      ByteBuffer buf = ByteBuffer.allocate(4096);

      ch.read(buf);

      buf.flip();

      for (Charset charset : orderedCharsets) {
        CharsetDecoder decoder = charset.newDecoder();

        decoder.reset();

        try {
          decoder.decode(buf);

          return charset;
        } catch (CharacterCodingException ignored) {
        }
      }
    }

    return Charset.defaultCharset();
  }
Example #17
0
  /** {@inheritDoc} */
  @Override
  public ByteBuffer encode(GridNioSession ses, GridClientMessage msg)
      throws IOException, GridException {
    assert msg != null;

    if (msg instanceof GridTcpRestPacket) return encodeMemcache((GridTcpRestPacket) msg);
    else if (msg == PING_MESSAGE) return ByteBuffer.wrap(PING_PACKET);
    else {
      byte[] data = marshaller.marshal(msg);

      assert data.length > 0;

      ByteBuffer res = ByteBuffer.allocate(data.length + 5);

      res.put(GRIDGAIN_REQ_FLAG);
      res.put(U.intToBytes(data.length));
      res.put(data);

      res.flip();

      return res;
    }
  }
 /** {@inheritDoc} */
 @Override
 public void writeExternal(ObjectOutput out) throws IOException {
   U.writeByteArray(out, val);
 }
 /** {@inheritDoc} */
 @Override
 public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
   val = U.readByteArray(in);
 }
Example #20
0
  /**
   * Validates incoming packet and deserializes all fields that need to be deserialized.
   *
   * @param ses Session on which packet is being parsed.
   * @param req Raw packet.
   * @return Same packet with fields deserialized.
   * @throws IOException If parsing failed.
   * @throws GridException If deserialization failed.
   */
  private GridClientMessage assemble(GridNioSession ses, GridTcpRestPacket req)
      throws IOException, GridException {
    byte[] extras = req.extras();

    // First, decode key and value, if any
    if (req.key() != null || req.value() != null) {
      short keyFlags = 0;
      short valFlags = 0;

      if (req.hasFlags()) {
        if (extras == null || extras.length < FLAGS_LENGTH)
          throw new IOException(
              "Failed to parse incoming packet (flags required for command) [ses="
                  + ses
                  + ", opCode="
                  + Integer.toHexString(req.operationCode() & 0xFF)
                  + ']');

        keyFlags = U.bytesToShort(extras, 0);
        valFlags = U.bytesToShort(extras, 2);
      }

      if (req.key() != null) {
        assert req.key() instanceof byte[];

        byte[] rawKey = (byte[]) req.key();

        // Only values can be hessian-encoded.
        req.key(decodeObj(keyFlags, rawKey));
      }

      if (req.value() != null) {
        assert req.value() instanceof byte[];

        byte[] rawVal = (byte[]) req.value();

        req.value(decodeObj(valFlags, rawVal));
      }
    }

    if (req.hasExpiration()) {
      if (extras == null || extras.length < 8)
        throw new IOException(
            "Failed to parse incoming packet (expiration value required for command) [ses="
                + ses
                + ", opCode="
                + Integer.toHexString(req.operationCode() & 0xFF)
                + ']');

      req.expiration(U.bytesToInt(extras, 4) & 0xFFFFFFFFL);
    }

    if (req.hasInitial()) {
      if (extras == null || extras.length < 16)
        throw new IOException(
            "Failed to parse incoming packet (initial value required for command) [ses="
                + ses
                + ", opCode="
                + Integer.toHexString(req.operationCode() & 0xFF)
                + ']');

      req.initial(U.bytesToLong(extras, 8));
    }

    if (req.hasDelta()) {
      if (extras == null || extras.length < 8)
        throw new IOException(
            "Failed to parse incoming packet (delta value required for command) [ses="
                + ses
                + ", opCode="
                + Integer.toHexString(req.operationCode() & 0xFF)
                + ']');

      req.delta(U.bytesToLong(extras, 0));
    }

    if (extras != null) {
      // Clients that include cache name must always include flags.
      int length = 4;

      if (req.hasExpiration()) length += 4;

      if (req.hasDelta()) length += 8;

      if (req.hasInitial()) length += 8;

      if (extras.length - length > 0) {
        byte[] cacheName = new byte[extras.length - length];

        System.arraycopy(extras, length, cacheName, 0, extras.length - length);

        req.cacheName(new String(cacheName));
      }
    }

    return req;
  }
Example #21
0
  /**
   * Parses memcache protocol message.
   *
   * @param ses Session.
   * @param buf Buffer containing not parsed bytes.
   * @param state Current parser state.
   * @return Parsed packet.s
   * @throws IOException If packet cannot be parsed.
   * @throws GridException If deserialization error occurred.
   */
  @Nullable
  private GridClientMessage parseMemcachePacket(
      GridNioSession ses, ByteBuffer buf, ParserState state) throws IOException, GridException {
    assert state.packetType() == PacketType.MEMCACHE;
    assert state.packet() != null;
    assert state.packet() instanceof GridTcpRestPacket;

    GridTcpRestPacket req = (GridTcpRestPacket) state.packet();
    ByteArrayOutputStream tmp = state.buffer();
    int i = state.index();

    while (buf.remaining() > 0) {
      byte b = buf.get();

      if (i == 0) req.requestFlag(b);
      else if (i == 1) req.operationCode(b);
      else if (i == 2 || i == 3) {
        tmp.write(b);

        if (i == 3) {
          req.keyLength(U.bytesToShort(tmp.toByteArray(), 0));

          tmp.reset();
        }
      } else if (i == 4) req.extrasLength(b);
      else if (i >= 8 && i <= 11) {
        tmp.write(b);

        if (i == 11) {
          req.totalLength(U.bytesToInt(tmp.toByteArray(), 0));

          tmp.reset();
        }
      } else if (i >= 12 && i <= 15) {
        tmp.write(b);

        if (i == 15) {
          req.opaque(tmp.toByteArray());

          tmp.reset();
        }
      } else if (i >= HDR_LEN && i < HDR_LEN + req.extrasLength()) {
        tmp.write(b);

        if (i == HDR_LEN + req.extrasLength() - 1) {
          req.extras(tmp.toByteArray());

          tmp.reset();
        }
      } else if (i >= HDR_LEN + req.extrasLength()
          && i < HDR_LEN + req.extrasLength() + req.keyLength()) {
        tmp.write(b);

        if (i == HDR_LEN + req.extrasLength() + req.keyLength() - 1) {
          req.key(tmp.toByteArray());

          tmp.reset();
        }
      } else if (i >= HDR_LEN + req.extrasLength() + req.keyLength()
          && i < HDR_LEN + req.totalLength()) {
        tmp.write(b);

        if (i == HDR_LEN + req.totalLength() - 1) {
          req.value(tmp.toByteArray());

          tmp.reset();
        }
      }

      if (i == HDR_LEN + req.totalLength() - 1)
        // Assembled the packet.
        return assemble(ses, req);

      i++;
    }

    state.index(i);

    return null;
  }
  /** {@inheritDoc} */
  @SuppressWarnings("BusyWait")
  @Override
  public void start(final GridRestProtocolHandler hnd) throws GridException {
    assert hnd != null;

    GridConfiguration cfg = ctx.config();

    GridNioServerListener<GridClientMessage> lsnr = new GridTcpRestNioListener(log, hnd);

    GridNioParser parser = new GridTcpRestParser(log);

    try {
      host = resolveRestTcpHost(cfg);

      SSLContext sslCtx = null;

      if (cfg.isRestTcpSslEnabled()) {
        GridSslContextFactory factory = cfg.getRestTcpSslContextFactory();

        if (factory == null)
          // Thrown SSL exception instead of GridException for writing correct warning message into
          // log.
          throw new SSLException("SSL is enabled, but SSL context factory is not specified.");

        sslCtx = factory.createSslContext();
      }

      int lastPort = cfg.getRestTcpPort() + cfg.getRestPortRange() - 1;

      for (port = cfg.getRestTcpPort(); port <= lastPort; port++) {
        if (startTcpServer(host, port, lsnr, parser, sslCtx, cfg)) {
          if (log.isInfoEnabled()) log.info(startInfo());

          return;
        }
      }

      U.warn(
          log,
          "Failed to start TCP binary REST server (possibly all ports in range are in use) "
              + "[firstPort="
              + cfg.getRestTcpPort()
              + ", lastPort="
              + lastPort
              + ", host="
              + host
              + ']');
    } catch (SSLException e) {
      U.warn(
          log,
          "Failed to start " + name() + " protocol on port " + port + ": " + e.getMessage(),
          "Failed to start "
              + name()
              + " protocol on port "
              + port
              + ". Check if SSL context factory is "
              + "properly configured.");
    } catch (IOException e) {
      U.warn(
          log,
          "Failed to start " + name() + " protocol on port " + port + ": " + e.getMessage(),
          "Failed to start "
              + name()
              + " protocol on port "
              + port
              + ". "
              + "Check restTcpHost configuration property.");
    }
  }
  /**
   * Compact class names.
   *
   * @param obj Object for compact.
   * @return Compacted string.
   */
  @Nullable
  public static String compactClass(@Nullable Object obj) {
    if (obj == null) return null;

    return U.compact(obj.getClass().getName());
  }
 /**
  * Log message.
  *
  * @param log Logger.
  * @param msg Message.
  */
 public static void log(@Nullable IgniteLogger log, String msg) {
   log0(log, U.currentTimeMillis(), " " + msg);
 }