예제 #1
0
  /**
   * 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);
    }
  }
  private void scheduleRecheck() {
    if (!isDone()) {
      GridTimeoutObject old = timeoutObj;

      if (old != null) cctx.kernalContext().timeout().removeTimeoutObject(old);

      GridTimeoutObject timeoutObj =
          new GridTimeoutObjectAdapter(
              cctx.gridConfig().getNetworkTimeout()
                  * Math.max(1, cctx.gridConfig().getCacheConfiguration().length)) {
            @Override
            public void onTimeout() {
              cctx.kernalContext()
                  .closure()
                  .runLocalSafe(
                      new Runnable() {
                        @Override
                        public void run() {
                          if (isDone()) return;

                          if (!enterBusy()) return;

                          try {
                            U.warn(
                                log,
                                "Retrying preload partition exchange due to timeout [done="
                                    + isDone()
                                    + ", dummy="
                                    + dummy
                                    + ", exchId="
                                    + exchId
                                    + ", rcvdIds="
                                    + F.id8s(rcvdIds)
                                    + ", rmtIds="
                                    + F.id8s(rmtIds)
                                    + ", remaining="
                                    + F.id8s(remaining())
                                    + ", init="
                                    + init
                                    + ", initFut="
                                    + initFut.isDone()
                                    + ", ready="
                                    + ready
                                    + ", replied="
                                    + replied
                                    + ", added="
                                    + added
                                    + ", oldest="
                                    + U.id8(oldestNode.get().id())
                                    + ", oldestOrder="
                                    + oldestNode.get().order()
                                    + ", evtLatch="
                                    + evtLatch.getCount()
                                    + ", locNodeOrder="
                                    + cctx.localNode().order()
                                    + ", locNodeId="
                                    + cctx.localNode().id()
                                    + ']',
                                "Retrying preload partition exchange due to timeout.");

                            recheck();
                          } finally {
                            leaveBusy();
                          }
                        }
                      });
            }
          };

      this.timeoutObj = timeoutObj;

      cctx.kernalContext().timeout().addTimeoutObject(timeoutObj);
    }
  }