| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package accord.api; |
| |
| import javax.annotation.Nonnull; |
| import javax.annotation.Nullable; |
| |
| import accord.primitives.Seekables; |
| import accord.primitives.Timestamp; |
| import accord.primitives.TxnId; |
| |
| /** |
| * The computational/transformation part of a client query |
| */ |
| public interface Query |
| { |
| /** |
| * Perform some transformation on the complete {@link Data} result of a {@link Read} |
| * from some {@link DataStore}, to produce a {@link Result} to return to the client. |
| * |
| * executeAt timestamp is provided so that the result of the transaction can be determined based |
| * on configuration at that epoch. This will be deterministic even if the transaction is recovered. |
| */ |
| Result compute(@Nonnull TxnId txnId, @Nonnull Timestamp executeAt, @Nonnull Seekables<?, ?> keys, @Nullable Data data, @Nullable Read read, @Nullable Update update); |
| } |