| /* |
| * 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 org.apache.flink.runtime.state; |
| |
| import org.apache.flink.annotation.PublicEvolving; |
| |
| /** |
| * This interface provides a context in which operators can initialize by registering to managed |
| * state (i.e. state that is managed by state backends) or iterating over streams of state |
| * partitions written as raw state in a previous snapshot. |
| * |
| * <p>Similar to the managed state from {@link ManagedInitializationContext} and in general, raw |
| * operator state is available to all operators, while raw keyed state is only available for |
| * operators after keyBy. |
| * |
| * <p>For the purpose of initialization, the context signals if all state is empty (new operator) or |
| * if any state was restored from a previous execution of this operator. |
| */ |
| @PublicEvolving |
| public interface StateInitializationContext extends FunctionInitializationContext { |
| |
| /** |
| * Returns an iterable to obtain input streams for previously stored operator state partitions |
| * that are assigned to this operator. |
| */ |
| Iterable<StatePartitionStreamProvider> getRawOperatorStateInputs(); |
| |
| /** |
| * Returns an iterable to obtain input streams for previously stored keyed state partitions that |
| * are assigned to this operator. |
| */ |
| Iterable<KeyGroupStatePartitionStreamProvider> getRawKeyedStateInputs(); |
| } |