@Override
protected void populateAvroHeaders(Map<String, String> hdrs, Schema schema, Object message) {
if (!initialized) {
// initialize here rather than in activateOptions to avoid initialization
// cycle in Configuration and log4j
try {
Class<?> c = Class.forName(datasetRepositoryClass);
Constructor<?> cons = c.getConstructor(URI.class);
DatasetRepository repo =
(DatasetRepository) cons.newInstance(new URI(datasetRepositoryUri));
Dataset dataset = repo.get(datasetName);
if (dataset.getDescriptor().isPartitioned()) {
partitionStrategy = dataset.getDescriptor().getPartitionStrategy();
}
URL schemaUrl = dataset.getDescriptor().getSchemaUrl();
if (schemaUrl != null) {
setAvroSchemaUrl(schemaUrl.toExternalForm());
}
} catch (Exception e) {
throw new FlumeException(e);
} finally {
initialized = true;
}
}
super.populateAvroHeaders(hdrs, schema, message);
if (partitionStrategy != null) {
key = partitionStrategy.partitionKeyForEntity(message, key);
int i = 0;
for (FieldPartitioner fp : partitionStrategy.getFieldPartitioners()) {
hdrs.put(PARTITION_PREFIX + fp.getName(), key.get(i++).toString());
}
}
}