| /* |
| * 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.ignite.internal; |
| |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Distribution modes for one or more closures executed via {@code Grid.call(...)} methods. |
| * In other words, given a set of jobs (closures) and set of grid nodes this enumeration provides |
| * three simple modes of how these jobs will be mapped to the nodes. |
| * <p> |
| * <b>Note</b> that if you need to provide custom distribution logic you need to |
| * implement {@link org.apache.ignite.compute.ComputeTask} interface that allows you to customize every aspect of a |
| * distributed Java code execution such as mapping, load balancing, failover, collision |
| * resolution, continuations, etc. |
| */ |
| public enum GridClosureCallMode { |
| /** |
| * In this mode all closures will be executed on each node. |
| * This mode essentially allows to <tt>broadcast</tt> executions to all nodes. |
| */ |
| BROADCAST, |
| |
| /** |
| * In this mode closures will be executed on the nodes provided by the default |
| * load balancer. |
| * <p> |
| * NOTE: this mode <b>must</b> be used for all cache affinity routing. Load balance |
| * manager has specific logic to handle co-location between compute grid jobs and |
| * in-memory data grid data. All other modes will not work for affinity-based co-location. |
| */ |
| BALANCE; |
| |
| /** Enumerated values. */ |
| private static final GridClosureCallMode[] VALS = values(); |
| |
| /** |
| * Efficiently gets enumerated value from its ordinal. |
| * |
| * @param ord Ordinal value. |
| * @return Enumerated value. |
| */ |
| @Nullable public static GridClosureCallMode fromOrdinal(byte ord) { |
| return ord >= 0 && ord < VALS.length ? VALS[ord] : null; |
| } |
| } |