hanyuzheng7 commented on code in PR #14570:
URL: https://github.com/apache/kafka/pull/14570#discussion_r1396800666
##########
streams/src/main/java/org/apache/kafka/streams/state/internals/MeteredTimestampedKeyValueStore.java:
##########
@@ -102,4 +139,216 @@ static class RawAndDeserializedValue<ValueType> {
this.value = value;
}
}
+
+ @SuppressWarnings("unchecked")
+ @Override
+ public <R> QueryResult<R> query(final Query<R> query,
+ final PositionBound positionBound,
+ final QueryConfig config) {
+
+ final long start = time.nanoseconds();
+ final QueryResult<R> result;
+
+ final StoreQueryUtils.QueryHandler handler =
queryHandlers.get(query.getClass());
+ if (handler == null) {
+ result = wrapped().query(query, positionBound, config);
+ if (config.isCollectExecutionInfo()) {
+ result.addExecutionInfo(
+ "Handled in " + getClass() + " in " +
(time.nanoseconds() - start) + "ns");
+ }
+ } else {
+ result = (QueryResult<R>) handler.apply(
+ query,
+ positionBound,
+ config,
+ this
+ );
+ if (config.isCollectExecutionInfo()) {
+ result.addExecutionInfo(
+ "Handled in " + getClass() + " with serdes "
+ + serdes + " in " + (time.nanoseconds() -
start) + "ns");
+ }
+ }
+ return result;
+ }
+
+
+
+ @SuppressWarnings("unchecked")
+ private <R> QueryResult<R> runTimestampedKeyQuery(final Query<R> query,
+ final PositionBound
positionBound,
+ final QueryConfig
config) {
+ final QueryResult<R> result;
+ final TimestampedKeyQuery<K, V> typedKeyQuery =
(TimestampedKeyQuery<K, V>) query;
+ final KeyQuery<Bytes, byte[]> rawKeyQuery =
+ KeyQuery.withKey(keyBytes(typedKeyQuery.key()));
+ final QueryResult<byte[]> rawResult =
+ wrapped().query(rawKeyQuery, positionBound, config);
+ if (rawResult.isSuccess()) {
+ final Function<byte[], ValueAndTimestamp<V>> deserializer =
getDeserializeValue(serdes, wrapped());
+ final ValueAndTimestamp<V> valueAndTimestamp =
deserializer.apply(rawResult.getResult());
+ final QueryResult<ValueAndTimestamp<V>> typedQueryResult =
+
InternalQueryResultUtil.copyAndSubstituteDeserializedResult(rawResult,
valueAndTimestamp);
+ result = (QueryResult<R>) typedQueryResult;
+ } else {
+ // the generic type doesn't matter, since failed queries have no
result set.
+ result = (QueryResult<R>) rawResult;
+ }
+ return result;
+ }
+
+ @SuppressWarnings("unchecked")
+ private <R> QueryResult<R> runTimestampedRangeQuery(final Query<R> query,
+ final PositionBound
positionBound,
+ final QueryConfig
config) {
+
+ final QueryResult<R> result;
+ final TimestampedRangeQuery<K, V> typedQuery =
(TimestampedRangeQuery<K, V>) query;
+ RangeQuery<Bytes, byte[]> rawRangeQuery;
+ final boolean isKeyAscending = typedQuery.isKeyAscending();
+ rawRangeQuery = RangeQuery.withRange(
+ keyBytes(typedQuery.lowerBound().orElse(null)),
+ keyBytes(typedQuery.upperBound().orElse(null))
+ );
+ if (!isKeyAscending) {
+ rawRangeQuery = rawRangeQuery.withDescendingKeys();
+ }
+ final QueryResult<KeyValueIterator<Bytes, byte[]>> rawResult =
+ wrapped().query(rawRangeQuery, positionBound, config);
+ if (rawResult.isSuccess()) {
+ final KeyValueIterator<Bytes, byte[]> iterator =
rawResult.getResult();
+ final KeyValueIterator<K, ValueAndTimestamp<V>> resultIterator =
(KeyValueIterator<K, ValueAndTimestamp<V>>) new
MeteredTimestampedKeyValueStoreIterator(
+ iterator,
+ getSensor,
+ getDeserializeValue(serdes, wrapped()),
+ false
+ );
+ final QueryResult<KeyValueIterator<K, ValueAndTimestamp<V>>>
typedQueryResult =
+
InternalQueryResultUtil.copyAndSubstituteDeserializedResult(
+ rawResult,
+ resultIterator
+ );
+ result = (QueryResult<R>) typedQueryResult;
+ } else {
+ // the generic type doesn't matter, since failed queries have no
result set.
+ result = (QueryResult<R>) rawResult;
+ }
+ return result;
+ }
+
+ @SuppressWarnings("unchecked")
+ private <R> QueryResult<R> runKeyQuery(final Query<R> query,
+ final PositionBound positionBound,
+ final QueryConfig config) {
+ final QueryResult<R> result;
+ final KeyQuery<K, V> typedKeyQuery = (KeyQuery<K, V>) query;
+ final KeyQuery<Bytes, byte[]> rawKeyQuery =
+ KeyQuery.withKey(keyBytes(typedKeyQuery.getKey()));
+ final QueryResult<byte[]> rawResult =
+ wrapped().query(rawKeyQuery, positionBound, config);
+ if (rawResult.isSuccess()) {
+ final Function<byte[], ValueAndTimestamp<V>> deserializer =
getDeserializeValue(serdes, wrapped());
+ final ValueAndTimestamp<V> valueAndTimestamp =
deserializer.apply(rawResult.getResult());
+ final V plainValue = valueAndTimestamp == null ? null :
valueAndTimestamp.value();
+ final QueryResult<V> typedQueryResult =
+
InternalQueryResultUtil.copyAndSubstituteDeserializedResult(rawResult,
plainValue);
+ result = (QueryResult<R>) typedQueryResult;
+ } else {
+ // the generic type doesn't matter, since failed queries have no
result set.
+ result = (QueryResult<R>) rawResult;
+ }
+ return result;
+ }
+
+ @SuppressWarnings("unchecked")
+ private <R> QueryResult<R> runRangeQuery(final Query<R> query,
+ final PositionBound
positionBound,
+ final QueryConfig config) {
+
+ final QueryResult<R> result;
+ final RangeQuery<K, V> typedQuery = (RangeQuery<K, V>) query;
+ RangeQuery<Bytes, byte[]> rawRangeQuery;
+ final boolean isKeyAscending = typedQuery.isKeyAscending();
+ rawRangeQuery = RangeQuery.withRange(
+ keyBytes(typedQuery.getLowerBound().orElse(null)),
+ keyBytes(typedQuery.getUpperBound().orElse(null))
+ );
+ if (!isKeyAscending) {
+ rawRangeQuery = rawRangeQuery.withDescendingKeys();
+ }
+ final QueryResult<KeyValueIterator<Bytes, byte[]>> rawResult =
+ wrapped().query(rawRangeQuery, positionBound, config);
+ if (rawResult.isSuccess()) {
+ final KeyValueIterator<Bytes, byte[]> iterator =
rawResult.getResult();
+ final KeyValueIterator<K, V> resultIterator = new
MeteredTimestampedKeyValueStoreIterator(
+ iterator,
+ getSensor,
+ getDeserializeValue(serdes, wrapped()),
+ true
+ );
+ final QueryResult<KeyValueIterator<K, V>> typedQueryResult =
+
InternalQueryResultUtil.copyAndSubstituteDeserializedResult(
+ rawResult,
+ resultIterator
+ );
+ result = (QueryResult<R>) typedQueryResult;
+ } else {
+ // the generic type doesn't matter, since failed queries have no
result set.
+ result = (QueryResult<R>) rawResult;
+ }
+ return result;
+ }
+
+ @SuppressWarnings("unchecked")
+ private class MeteredTimestampedKeyValueStoreIterator implements
KeyValueIterator<K, V> {
+
+ private final KeyValueIterator<Bytes, byte[]> iter;
+ private final Sensor sensor;
+ private final long startNs;
+ private final Function<byte[], ValueAndTimestamp<V>> valueDeserializer;
+
+ private final boolean isKeyOrRangeQuery;
+
+ private MeteredTimestampedKeyValueStoreIterator(final
KeyValueIterator<Bytes, byte[]> iter,
+ final Sensor sensor,
+ final Function<byte[],
ValueAndTimestamp<V>> valueDeserializer,
+ final boolean
isKeyOrRangeQuery) {
Review Comment:
fixed it.
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