wonook commented on a change in pull request #111: [NEMO-139, 6] Logic in the scheduler for appending jobs, Support RDD caching URL: https://github.com/apache/incubator-nemo/pull/111#discussion_r211171694
########## File path: common/src/main/java/edu/snu/nemo/common/ir/vertex/executionproperty/GhostProperty.java ########## @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2018 Seoul National University + * + * Licensed 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 edu.snu.nemo.common.ir.vertex.executionproperty; + +import edu.snu.nemo.common.ir.executionproperty.VertexExecutionProperty; + +/** + * Attaching this property makes runtime to not schedule this ghost vertex. + * This kind of vertices is needed when some data have to be written before it's usage is not determined yet + * (e.g., for caching). + */ +public final class GhostProperty extends VertexExecutionProperty<Boolean> { Review comment: How about keeping all these components in the `EmptyComponents` class? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
