@Test
public void testAppend() throws IOException {
final int COL_COUNT = 10;
final byte [] tableName = Bytes.toBytes("tablename");
final byte [] row = Bytes.toBytes("row");
Reader reader = null;
HLog log = new HLog(fs, dir, oldLogDir, conf);
try {
// Write columns named 1, 2, 3, etc. and then values of single byte
// 1, 2, 3...
long timestamp = System.currentTimeMillis();
WALEdit cols = new WALEdit();
for (int i = 0; i < COL_COUNT; i++) {
cols.add(new KeyValue(row, Bytes.toBytes("column"),
Bytes.toBytes(Integer.toString(i)),
timestamp, new byte[] { (byte)(i + '0') }));
}
HRegionInfo hri = new HRegionInfo(tableName,
HConstants.EMPTY_START_ROW, HConstants.EMPTY_END_ROW);
HTableDescriptor htd = new HTableDescriptor();
htd.addFamily(new HColumnDescriptor("column"));
log.append(hri, tableName, cols, System.currentTimeMillis(), htd);
long logSeqId = log.startCacheFlush(hri.getEncodedNameAsBytes());
log.completeCacheFlush(hri.getEncodedNameAsBytes(), tableName, logSeqId, false);
log.close();
Path filename = log.computeFilename();
log = null;
// Now open a reader on the log and assert append worked.
reader = HLog.getReader(fs, filename, conf);
HLog.Entry entry = reader.next();
assertEquals(COL_COUNT, entry.getEdit().size());
int idx = 0;
for (KeyValue val : entry.getEdit().getKeyValues()) {
assertTrue(Bytes.equals(hri.getEncodedNameAsBytes(),
entry.getKey().getEncodedRegionName()));
assertTrue(Bytes.equals(tableName, entry.getKey().getTablename()));
assertTrue(Bytes.equals(row, val.getRow()));
assertEquals((byte)(idx + '0'), val.getValue()[0]);
System.out.println(entry.getKey() + " " + val);
idx++;
}
// Get next row... the meta flushed row.
entry = reader.next();
assertEquals(1, entry.getEdit().size());
for (KeyValue val : entry.getEdit().getKeyValues()) {
assertTrue(Bytes.equals(hri.getEncodedNameAsBytes(),
entry.getKey().getEncodedRegionName()));
assertTrue(Bytes.equals(tableName, entry.getKey().getTablename()));
assertTrue(Bytes.equals(HLog.METAROW, val.getRow()));
assertTrue(Bytes.equals(HLog.METAFAMILY, val.getFamily()));
assertEquals(0, Bytes.compareTo(HLog.COMPLETE_CACHE_FLUSH,
val.getValue()));
System.out.println(entry.getKey() + " " + val);
}
} finally {
if (log != null) {
log.closeAndDelete();
}
if (reader != null) {
reader.close();
}
}
}