@Override
protected final String[] runDataTask() throws Exception {
prepareInputs();
result = new Q18ResultRanking();
long startTime = System.currentTimeMillis();
for (int i = 0; i < ordersPartitionCount; ++i) {
LOG.info("processing.. " + i + "/" + ordersPartitionCount);
processPartition(i);
}
long endTime = System.currentTimeMillis();
LOG.info("total processPartition() time: " + (endTime - startTime) + "ms");
LOG.info("sub-ranking:" + result);
// TODO : use outputToLocalTmpFile.
// serialize the sub-ranking to a file
VirtualFile tmpFolder = new LocalVirtualFile(context.localLvfsTmpDir);
if (!tmpFolder.exists()) {
tmpFolder.mkdirs();
}
assert (tmpFolder.exists());
String filename = "tmp_subrank_" + Math.abs(new Random(System.nanoTime()).nextInt());
VirtualFile subrankFile = tmpFolder.getChildFile(filename);
VirtualFileOutputStream out = subrankFile.getOutputStream();
DataOutputStream dataOut = new DataOutputStream(out);
result.write(dataOut);
dataOut.flush();
dataOut.close();
LOG.info("wrote sub-ranking to " + subrankFile.getAbsolutePath());
return new String[] {subrankFile.getAbsolutePath()};
}
private void addRanking(
int custkey, long orderkey, long orderdate, double totalprice, double sumquantity) {
Q18Result tuple = new Q18Result();
tuple.C_CUSTKEY = custkey;
tuple.O_ORDERKEY = orderkey;
tuple.O_ORDERDATE = orderdate;
tuple.O_TOTALPRICE = totalprice;
tuple.SUM_L_QUANTITY = sumquantity;
result.add(tuple);
}
private boolean willBeRanked(long orderkey, long orderdate, double totalprice) {
return result.willBeRanked(orderkey, orderdate, totalprice);
}