public void write(DataOutput out) throws IOException {
if (activeTrackers.size() == 0) {
out.writeInt(numActiveTrackers);
out.writeInt(0);
} else {
out.writeInt(activeTrackers.size());
out.writeInt(activeTrackers.size());
for (String tracker : activeTrackers) {
Text.writeString(out, tracker);
}
}
if (blacklistedTrackersInfo.size() == 0) {
out.writeInt(numBlacklistedTrackers);
out.writeInt(blacklistedTrackersInfo.size());
} else {
out.writeInt(blacklistedTrackersInfo.size());
out.writeInt(blacklistedTrackersInfo.size());
for (BlackListInfo tracker : blacklistedTrackersInfo) {
tracker.write(out);
}
}
out.writeInt(numExcludedNodes);
out.writeLong(ttExpiryInterval);
out.writeInt(map_tasks);
out.writeInt(reduce_tasks);
out.writeInt(max_map_tasks);
out.writeInt(max_reduce_tasks);
out.writeLong(used_memory);
out.writeLong(max_memory);
WritableUtils.writeEnum(out, state);
}
public void readFields(DataInput in) throws IOException {
numActiveTrackers = in.readInt();
int numTrackerNames = in.readInt();
if (numTrackerNames > 0) {
for (int i = 0; i < numTrackerNames; i++) {
String name = Text.readString(in);
activeTrackers.add(name);
}
}
numBlacklistedTrackers = in.readInt();
int blackListTrackerInfoSize = in.readInt();
if (blackListTrackerInfoSize > 0) {
for (int i = 0; i < blackListTrackerInfoSize; i++) {
BlackListInfo info = new BlackListInfo();
info.readFields(in);
blacklistedTrackersInfo.add(info);
}
}
numExcludedNodes = in.readInt();
ttExpiryInterval = in.readLong();
map_tasks = in.readInt();
reduce_tasks = in.readInt();
max_map_tasks = in.readInt();
max_reduce_tasks = in.readInt();
used_memory = in.readLong();
max_memory = in.readLong();
state = WritableUtils.readEnum(in, JobTracker.State.class);
}
/**
* Get the names of task trackers in the cluster.
*
* @return the blacklisted task trackers in the cluster.
*/
public Collection<String> getBlacklistedTrackerNames() {
ArrayList<String> blacklistedTrackers = new ArrayList<String>();
for (BlackListInfo bi : blacklistedTrackersInfo) {
blacklistedTrackers.add(bi.getTrackerName());
}
return blacklistedTrackers;
}
