public void run() {
// TODO Auto-generated method stub
run = true;
System.out.println("Running a map");
while (run) {
// Figure out how to read input file
// Evaluate it
Map<String, List<String>> input = reader.getKeyValuePairs();
if (input == null) {
map.setStatus(-1);
Message msg = new Message();
msg.setTask(map);
msg.setType('f');
coord.conn.sendMessage(msg);
return;
}
OutputCollector<String, String> collect = new OutputCollector<String, String>();
Set<String> keySet = input.keySet();
for (String key : keySet) {
List<String> values = input.get(key);
for (String value : values) {
map.getJob().map(key, value, collect);
}
}
List<Pair> results = collect.getResults();
int length = results.size();
FileOutputStream out;
try {
System.out.println("Trying to Write to File");
out = new FileOutputStream(new File(map.getOutput().get(0)));
BufferedWriter dw = new BufferedWriter(new OutputStreamWriter(out));
for (Pair p : results) {
dw.append(p.toString());
dw.newLine();
}
dw.newLine();
dw.flush();
dw.close();
out.close();
coord.dataNode.addFileToDFS(map.getOutput().get(0), coord.conn.port, false);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
map.setStatus(-1);
Message msg = new Message();
msg.setTask(map);
msg.setType('f');
coord.conn.sendMessage(msg);
return;
}
map.setStatus(1);
Message msg = new Message();
msg.setTask(map);
msg.setType('f');
coord.conn.sendMessage(msg);
break;
}
}
public RunMap(MapTask m, SlaveCoordinator coordinator) {
map = m;
coord = coordinator;
RandomAccessFile read;
try {
read = new RandomAccessFile((m.getInput()).get(0), "r");
List<RandomAccessFile> readers = new LinkedList<RandomAccessFile>();
readers.add(read);
reader = new RecordReader(readers, m.recordlength, true);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}