| /* |
| * 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.wayang.core.platform; |
| |
| import java.util.Collection; |
| import org.apache.wayang.core.optimizer.enumeration.ExecutionTaskFlow; |
| import org.apache.wayang.core.plan.executionplan.Channel; |
| |
| /** |
| * Contains a state of the execution of an {@link ExecutionTaskFlow}. |
| */ |
| public interface ExecutionState { |
| |
| /** |
| * Register a {@link ChannelInstance}. |
| * |
| * @param channelInstance that should be registered |
| */ |
| void register(ChannelInstance channelInstance); |
| |
| /** |
| * Obtain a previously registered {@link ChannelInstance}. |
| * |
| * @param channel the {@link Channel} of the {@link ChannelInstance} |
| * @return the {@link ChannelInstance} or {@code null} if none |
| */ |
| ChannelInstance getChannelInstance(Channel channel); |
| |
| /** |
| * Registers a measured cardinality. |
| * |
| * @param channelInstance the {@link ChannelInstance} for that there is a measured cardinality |
| */ |
| void addCardinalityMeasurement(ChannelInstance channelInstance); |
| |
| /** |
| * Retrieve previously registered cardinality measurements |
| * |
| * @return {@link ChannelInstance}s that contain cardinality measurements |
| */ |
| Collection<ChannelInstance> getCardinalityMeasurements(); |
| |
| |
| /** |
| * Stores a {@link PartialExecution}. |
| * |
| * @param partialExecution to be stored |
| */ |
| void add(PartialExecution partialExecution); |
| |
| /** |
| * Retrieves previously stored {@link PartialExecution}s. |
| * |
| * @return the {@link PartialExecution}s |
| */ |
| Collection<PartialExecution> getPartialExecutions(); |
| } |