| /* |
| * 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.hugegraph.job; |
| |
| import org.apache.hugegraph.backend.id.Id; |
| import org.apache.hugegraph.backend.id.IdGenerator; |
| import org.apache.hugegraph.task.HugeTask; |
| import org.apache.hugegraph.task.TaskScheduler; |
| import org.apache.hugegraph.HugeGraph; |
| import org.apache.hugegraph.util.E; |
| |
| public class EphemeralJobBuilder<V> { |
| |
| private final HugeGraph graph; |
| |
| private String name; |
| private String input; |
| private EphemeralJob<V> job; |
| |
| // Use negative task id for ephemeral task |
| private static int ephemeralTaskId = -1; |
| |
| public static <T> EphemeralJobBuilder<T> of(final HugeGraph graph) { |
| return new EphemeralJobBuilder<>(graph); |
| } |
| |
| public EphemeralJobBuilder(final HugeGraph graph) { |
| this.graph = graph; |
| } |
| |
| public EphemeralJobBuilder<V> name(String name) { |
| this.name = name; |
| return this; |
| } |
| |
| public EphemeralJobBuilder<V> input(String input) { |
| this.input = input; |
| return this; |
| } |
| |
| public EphemeralJobBuilder<V> job(EphemeralJob<V> job) { |
| this.job = job; |
| return this; |
| } |
| |
| public HugeTask<V> schedule() { |
| E.checkArgumentNotNull(this.name, "Job name can't be null"); |
| E.checkArgumentNotNull(this.job, "Job can't be null"); |
| |
| HugeTask<V> task = new HugeTask<>(this.genTaskId(), null, this.job); |
| task.type(this.job.type()); |
| task.name(this.name); |
| if (this.input != null) { |
| task.input(this.input); |
| } |
| |
| TaskScheduler scheduler = this.graph.taskScheduler(); |
| scheduler.schedule(task); |
| |
| return task; |
| } |
| |
| private Id genTaskId() { |
| if (ephemeralTaskId >= 0) { |
| ephemeralTaskId = -1; |
| } |
| return IdGenerator.of(ephemeralTaskId--); |
| } |
| } |