Examples of java.io.FileDescriptor.sync()

java.io.FileDescriptor.sync()
Ensures that data which is buffered within the underlying implementation is written out to the appropriate device before returning. @throws SyncFailedException when the operation fails

        f.delete();
        fos = new FileOutputStream(f.getPath());
        fos.write("Test String".getBytes());
        fis = new FileInputStream(f.getPath());
        FileDescriptor fd = fos.getFD();
        fd.sync();
        int length = "Test String".length();
        assertEquals("Bytes were not written after sync", length, fis
                .available());


        // Regression test for Harmony-1494

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        assertEquals("Bytes were not written after sync", length, fis
                .available());


        RandomAccessFile raf = new RandomAccessFile(f, "r");
        fd = raf.getFD();
        fd.sync();
        raf.close();
    }


    /**
     * @tests java.io.FileDescriptor#valid()

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      Date start = new Date();


      for (int index = 0; index < numberOfCalls; index++)
      {
        randomAccessFile.write(block);
        fileDescriptor.sync();
      }


      Date end = new Date();


      randomAccessFile.close();

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                    descriptor = access.getFD();
                }
            }


            if (descriptor != null) {
                descriptor.sync();
            }
        }
    }


    /**

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                try {
                    FileDescriptor fd = fout.getFD();
                    fout.write((refValue + "\n").getBytes(CHARSET));
                    fout.flush();
                    // force change to be persisted to disk
                    fd.sync();
                } finally {
                    fout.close();
                }
            }
        } catch (IOException e) {

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                    descriptor = access.getFD();
                }
            }


            if (descriptor != null) {
                descriptor.sync();
            }
        }
    }


    /**

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                out.writeInt(bytes.remaining());
                out.write(bytes.array(),bytes.position()+bytes.arrayOffset(),bytes.remaining());
                ++count;
            }
            out.flush();
            fd.sync();
            out.close();
            if (!tmpFile.renameTo(savedCachePath))
                throw new IOException("Unable to rename cache to " + savedCachePath);
            if (logger.isDebugEnabled())
                logger.debug("saved " + count + " keys in " + (System.currentTimeMillis() - start) + " ms from " + msgSuffix);

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/*  753 */           if (synchronousWrites())
/*      */           {
/*  757 */             ofile.flush();
/*      */ 
/*  759 */             FileDescriptor fileDesc = ofile.getFD();
/*  760 */             fileDesc.sync();
/*      */           }
/*      */         }
/*      */         catch (SyncFailedException e)
/*      */         {
/*  765 */           closeAndUnlock(fd, null, ofile);

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                out.writeInt(bytes.remaining());
                out.write(bytes.array(),bytes.position()+bytes.arrayOffset(),bytes.remaining());
                ++count;
            }
            out.flush();
            fd.sync();
            out.close();
            if (!tmpFile.renameTo(savedCachePath))
                throw new IOException("Unable to rename cache to " + savedCachePath);
            if (logger.isDebugEnabled())
                logger.debug("saved " + count + " keys in " + (System.currentTimeMillis() - start) + " ms from" + msgSuffix);

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