/** Main method. */
public void run() {
logger.debug("reducer server running: "); // + rank);
// try {
// pairChannel = new MPIChannel(engine, rank);
// } catch (IOException e) {
// e.printStackTrace();
// return;
// } catch (MPIException e) {
// e.printStackTrace();
// return;
// }
if (logger.isInfoEnabled()) {
logger.info("reducer server running: pairChannel = " + pairChannel);
}
Pair<C> pair;
GenPolynomial<C> H = null;
boolean set = false;
boolean goon = true;
int polIndex = -1;
int red = 0;
int sleeps = 0;
// while more requests
while (goon) {
// receive request
logger.debug("receive request");
Object req = null;
try {
req = pairChannel.receive();
} catch (IOException e) {
goon = false;
e.printStackTrace();
} catch (MPIException e) {
goon = false;
e.printStackTrace();
} catch (ClassNotFoundException e) {
goon = false;
e.printStackTrace();
}
// logger.debug("received request, req = " + req);
if (req == null) {
goon = false;
break;
}
if (!(req instanceof GBTransportMessReq)) {
goon = false;
break;
}
// find pair
logger.debug("find pair");
while (!pairlist.hasNext()) { // wait
if (!set) {
finaler.beIdle();
set = true;
}
if (!finaler.hasJobs() && !pairlist.hasNext()) {
goon = false;
break;
}
try {
sleeps++;
if (sleeps % 10 == 0) {
logger.info(" reducer is sleeping");
}
Thread.sleep(100);
} catch (InterruptedException e) {
goon = false;
break;
}
}
if (!pairlist.hasNext() && !finaler.hasJobs()) {
goon = false;
break; // continue; //break?
}
if (set) {
set = false;
finaler.notIdle();
}
pair = pairlist.removeNext();
/*
* send pair to client, receive H
*/
logger.debug("send pair = " + pair);
GBTransportMess msg = null;
if (pair != null) {
msg = new GBTransportMessPairIndex(pair);
} else {
msg = new GBTransportMess(); // End();
// goon ?= false;
}
try {
pairChannel.send(msg);
} catch (IOException e) {
e.printStackTrace();
goon = false;
break;
} catch (MPIException e) {
e.printStackTrace();
goon = false;
break;
}
logger.debug("#distributed list = " + theList.size());
Object rh = null;
try {
rh = pairChannel.receive();
} catch (IOException e) {
e.printStackTrace();
goon = false;
break;
} catch (MPIException e) {
e.printStackTrace();
goon = false;
break;
} catch (ClassNotFoundException e) {
e.printStackTrace();
goon = false;
break;
}
// logger.debug("received H polynomial");
if (rh == null) {
if (pair != null) {
pair.setZero();
}
} else if (rh instanceof GBTransportMessPoly) {
// update pair list
red++;
H = ((GBTransportMessPoly<C>) rh).pol;
if (logger.isDebugEnabled()) {
logger.debug("H = " + H);
}
if (H == null) {
if (pair != null) {
pair.setZero();
}
} else {
if (H.isZERO()) {
pair.setZero();
} else {
if (H.isONE()) {
polIndex = pairlist.putOne();
// GenPolynomial<C> nn =
theList.putWait(Integer.valueOf(polIndex), H);
goon = false;
break;
}
polIndex = pairlist.put(H);
// use putWait ? but still not all distributed
// GenPolynomial<C> nn =
theList.putWait(Integer.valueOf(polIndex), H);
}
}
}
}
logger.info("terminated, done " + red + " reductions");
/*
* send end mark to client
*/
logger.debug("send end");
try {
pairChannel.send(new GBTransportMessEnd());
} catch (IOException e) {
if (logger.isDebugEnabled()) {
e.printStackTrace();
}
} catch (MPIException e) {
if (logger.isDebugEnabled()) {
e.printStackTrace();
}
}
finaler.beIdle();
pairChannel.close();
}
