/**
* Return a KijiDataRequest that describes which input columns need to be available.
*
* @return A kiji data request.
*/
public KijiDataRequest getDataRequest() {
final KijiDataRequest dataRequest = mProducer.getDataRequest();
if (dataRequest.isEmpty()) {
throw new JobConfigurationException(
mProducer.getClass().getName()
+ " returned an empty KijiDataRequest, which is not allowed.");
}
return dataRequest;
}
/** {@inheritDoc} */
@Override
protected void setup(Context context) throws IOException {
super.setup(context);
Preconditions.checkState(mProducerContext == null);
final Configuration conf = context.getConfiguration();
mProducer = KijiProducers.create(conf);
final String column = Preconditions.checkNotNull(mProducer.getOutputColumn());
mOutputColumn = new KijiColumnName(column);
mProducerContext = InternalProducerContext.create(context, mOutputColumn);
mProducer.setup(mProducerContext);
}
/** {@inheritDoc} */
@Override
protected void cleanup(Context context) throws IOException {
Preconditions.checkState(mProducerContext != null);
mProducer.cleanup(mProducerContext);
mProducerContext.close();
mProducerContext = null;
super.cleanup(context);
}
/** {@inheritDoc} */
@Override
protected void map(KijiRowData input, Context mapContext) throws IOException {
mProducerContext.setEntityId(input.getEntityId());
mProducer.produce(input, mProducerContext);
mapContext.getCounter(JobHistoryCounters.PRODUCER_ROWS_PROCESSED).increment(1);
}