/**
* get an Iterator containing the abouts for the nativeItem
*
* @param nativeItem
* @return an Iterator containing the list of about values for this nativeItem
*/
private Iterator getAbouts(Map<String, Object> nativeItem) throws OAIInternalServerError {
StatementResultSet stmtRs = null;
try {
List<String> abouts = new ArrayList<String>();
if (aboutQuery != null) {
RecordFactory rf = getRecordFactory();
String oaiIdentifier = rf.getOAIIdentifier(nativeItem);
stmtRs = new StatementResultSet(populateAboutQuery(oaiIdentifier));
while (stmtRs.next()) {
Map<String, Object> aboutMap = stmtRs.getColumnValues();
abouts.add((String) aboutMap.get(aboutValueLabel));
}
}
return abouts.iterator();
} catch (SQLException e) {
LOGGER.error("An Exception occured", e);
throw new OAIInternalServerError(e.getMessage());
} finally {
try {
stmtRs.close();
} catch (SQLException e) {
LOGGER.error("An Exception occured", e);
throw new OAIInternalServerError(e.getMessage());
}
}
}
@Override
public void cleanup(Context context) throws IOException, InterruptedException {
for (RecordFactory factory : reduces) {
key.setSeed(r.nextLong());
while (factory.next(key, val)) {
context.write(key, val);
key.setSeed(r.nextLong());
}
}
}
@Override
protected void cleanup(Context context) throws IOException, InterruptedException {
val.setSeed(r.nextLong());
while (factory.next(null, val)) {
context.write(NullWritable.get(), val);
val.setSeed(r.nextLong());
}
}
@Override
public void map(NullWritable ignored, GridmixRecord rec, Context context)
throws IOException, InterruptedException {
acc += ratio;
while (acc >= 1.0 && !reduces.isEmpty()) {
key.setSeed(r.nextLong());
val.setSeed(r.nextLong());
final int idx = r.nextInt(reduces.size());
final RecordFactory f = reduces.get(idx);
if (!f.next(key, val)) {
reduces.remove(idx);
continue;
}
context.write(key, val);
acc -= 1.0;
}
}
@Override
protected void reduce(GridmixKey key, Iterable<GridmixRecord> values, Context context)
throws IOException, InterruptedException {
for (GridmixRecord ignored : values) {
acc += ratio;
while (acc >= 1.0 && factory.next(null, val)) {
context.write(NullWritable.get(), val);
acc -= 1.0;
}
}
}
@Override
public void close() throws IOException {
factory.close();
}
@Override
public float getProgress() throws IOException {
return factory.getProgress();
}
@Override
public boolean nextKeyValue() throws IOException {
val.setSeed(r.nextLong());
return factory.next(null, val);
}
