| /* |
| * 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.fluo.api.client; |
| |
| import java.util.concurrent.CompletableFuture; |
| |
| /** |
| * Executes provided {@link Loader} objects to load data into Fluo. {@link LoaderExecutor#close()} |
| * should be called when finished. |
| * |
| * @since 1.0.0 |
| */ |
| public interface LoaderExecutor extends AutoCloseable { |
| |
| /** |
| * Queues {@link Loader} task implemented by users for execution. The load Task may not have |
| * completed when the method returns. If the queue is full, this method will block. |
| * |
| * <p> |
| * If a previous execution of loader has thrown an exception, then this call may throw an |
| * exception. To avoid this odd behavior use {@link #submit(Loader)} instead which relays |
| * exceptions through the returned future. |
| */ |
| void execute(Loader loader); |
| |
| /** |
| * Same as {@link #execute(Loader)}, but allows specifying an identity. The identity is used in |
| * metrics and trace logging. When an identity is not supplied, the class name is used. In the |
| * case of lambdas the class name may not be the same in different processes. |
| * |
| * @since 1.1.0 |
| */ |
| void execute(String identity, Loader loader); |
| |
| |
| /** |
| * Same as {@link #execute(Loader)} except it returns a future that completes upon successful |
| * commit and if an exception is thrown in the loader, it will be relayed through the future. The |
| * result of the future is the Loader that was successfully executed. If storing any information |
| * in the loader object, keep in mind that loaders may execute multiple times in the case of |
| * commit collisions. If a loader executes multiple times, it may see different data on subsequent |
| * executions. |
| * |
| * @since 2.0.0 |
| */ |
| <T extends Loader> CompletableFuture<T> submit(T loader); |
| |
| |
| /** |
| * Same behavior as {@link #submit(Loader)}. |
| * |
| * @param identity see {@link #execute(String, Loader)} for a description of this parameter |
| * @since 2.0.0 |
| */ |
| <T extends Loader> CompletableFuture<T> submit(String identity, T loader); |
| |
| /** |
| * Waits for all queued and running Loader task to complete, then cleans up resources. |
| * |
| * <p> |
| * If a loader executed via {@link #execute(Loader)} or {@link #execute(String, Loader)} threw an |
| * exception then this method will throw an exception. Exceptions thrown by loaders executed using |
| * {@link #submit(Loader)} or {@link #submit(String, Loader)} will never cause this method to |
| * throw an exception. |
| */ |
| @Override |
| void close(); |
| } |