@Override
public void writeRecord(Record rec) throws IOException {
IntValue key = rec.getField(0, IntValue.class);
IntValue value = rec.getField(1, IntValue.class);
this.bld.setLength(0);
this.bld.append(key.getValue());
this.bld.append('_');
this.bld.append(value.getValue());
this.bld.append('\n');
byte[] bytes = this.bld.toString().getBytes();
this.stream.write(bytes);
}
public static void prepareInputFile(
MutableObjectIterator<Record> inIt, String inputFilePath, boolean insertInvalidData)
throws IOException {
FileWriter fw = new FileWriter(inputFilePath);
BufferedWriter bw = new BufferedWriter(fw);
if (insertInvalidData) {
bw.write("####_I_AM_INVALID_########\n");
}
Record rec = new Record();
while ((rec = inIt.next(rec)) != null) {
IntValue key = rec.getField(0, IntValue.class);
IntValue value = rec.getField(1, IntValue.class);
bw.write(key.getValue() + "_" + value.getValue() + "\n");
}
if (insertInvalidData) {
bw.write("####_I_AM_INVALID_########\n");
}
bw.flush();
bw.close();
}
@Override
public void invoke() throws Exception {
RecordReader<IntValue> reader =
new RecordReader<>(getEnvironment().getInputGate(0), IntValue.class);
try {
final int numberOfSubtaskIndexesToReceive =
getTaskConfiguration().getInteger(CONFIG_KEY, 0);
final BitSet receivedSubtaskIndexes = new BitSet(numberOfSubtaskIndexesToReceive);
IntValue record;
int numberOfReceivedSubtaskIndexes = 0;
while ((record = reader.next()) != null) {
// Check that we don't receive more than expected
numberOfReceivedSubtaskIndexes++;
if (numberOfReceivedSubtaskIndexes > numberOfSubtaskIndexesToReceive) {
throw new IllegalStateException("Received more records than expected.");
}
int subtaskIndex = record.getValue();
// Check that we only receive each subtask index once
if (receivedSubtaskIndexes.get(subtaskIndex)) {
throw new IllegalStateException("Received expected subtask index twice.");
} else {
receivedSubtaskIndexes.set(subtaskIndex, true);
}
}
// Check that we have received all expected subtask indexes
if (receivedSubtaskIndexes.cardinality() != numberOfSubtaskIndexesToReceive) {
throw new IllegalStateException(
"Finished receive, but did not receive " + "all expected subtask indexes.");
}
} finally {
reader.clearBuffers();
}
}