public void testAppend() throws IOException {
final int COL_COUNT = 10;
final Text regionName = new Text("regionname");
final Text tableName = new Text("tablename");
final Text row = new Text("row");
Reader reader = null;
HLog log = new HLog(fs, dir, this.conf, null);
try {
// Write columns named 1, 2, 3, etc. and then values of single byte
// 1, 2, 3...
long timestamp = System.currentTimeMillis();
TreeMap<HStoreKey, byte []> cols = new TreeMap<HStoreKey, byte []>();
for (int i = 0; i < COL_COUNT; i++) {
cols.put(new HStoreKey(row, new Text(Integer.toString(i)), timestamp),
new byte[] { (byte)(i + '0') });
}
log.append(regionName, tableName, cols);
long logSeqId = log.startCacheFlush();
log.completeCacheFlush(regionName, tableName, logSeqId);
log.close();
Path filename = log.computeFilename(log.filenum - 1);
log = null;
// Now open a reader on the log and assert append worked.
reader = new SequenceFile.Reader(fs, filename, conf);
HLogKey key = new HLogKey();
HLogEdit val = new HLogEdit();
for (int i = 0; i < COL_COUNT; i++) {
reader.next(key, val);
assertEquals(regionName, key.getRegionName());
assertEquals(tableName, key.getTablename());
assertEquals(row, key.getRow());
assertEquals((byte)(i + '0'), val.getVal()[0]);
System.out.println(key + " " + val);
}
while (reader.next(key, val)) {
// Assert only one more row... the meta flushed row.
assertEquals(regionName, key.getRegionName());
assertEquals(tableName, key.getTablename());
assertEquals(HLog.METAROW, key.getRow());
assertEquals(HLog.METACOLUMN, val.getColumn());
assertEquals(0, HLogEdit.completeCacheFlush.compareTo(val.getVal()));
System.out.println(key + " " + val);
}
} finally {
if (log != null) {
log.closeAndDelete();
}
if (reader != null) {
reader.close();
}
}
}