Example 1 with Strategy
use of com.yahoo.bullet.aggregations.Strategy in project bullet-core by yahoo.
the class Querier method initialize.
// ********************************* Monoidal Interface Overrides *********************************
/**
* Starts the query.
*/
@Override
@SuppressWarnings("unchecked")
public Optional<List<BulletError>> initialize() {
// Is an empty map if metadata was disabled
metaKeys = (Map<String, String>) config.getAs(BulletConfig.RESULT_METADATA_METRICS, Map.class);
Boolean shouldInjectTimestamp = config.getAs(BulletConfig.RECORD_INJECT_TIMESTAMP, Boolean.class);
if (shouldInjectTimestamp) {
timestampKey = config.getAs(BulletConfig.RECORD_INJECT_TIMESTAMP_KEY, String.class);
}
boolean isRateLimitEnabled = config.getAs(BulletConfig.RATE_LIMIT_ENABLE, Boolean.class);
if (isRateLimitEnabled) {
int maxEmit = config.getAs(BulletConfig.RATE_LIMIT_MAX_EMIT_COUNT, Integer.class);
int timeInterval = config.getAs(BulletConfig.RATE_LIMIT_TIME_INTERVAL, Integer.class);
rateLimit = new RateLimiter(maxEmit, timeInterval);
}
Optional<List<BulletError>> errors;
errors = runningQuery.initialize();
if (errors.isPresent()) {
return errors;
}
Query query = this.runningQuery.getQuery();
// Aggregation and Strategy are guaranteed to not be null.
Strategy strategy = AggregationOperations.findStrategy(query.getAggregation(), config);
errors = strategy.initialize();
if (errors.isPresent()) {
return errors;
}
// Scheme is guaranteed to not be null.
window = WindowingOperations.findScheme(query, strategy, config);
return window.initialize();
}