Github user zentol commented on a diff in the pull request: https://github.com/apache/flink/pull/4763#discussion_r143413201 --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/rest/messages/checkpoints/CheckpointStatistics.java --- @@ -0,0 +1,534 @@ +/* + * 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.flink.runtime.rest.messages.checkpoints; + +import org.apache.flink.runtime.checkpoint.AbstractCheckpointStats; +import org.apache.flink.runtime.checkpoint.CheckpointStatsStatus; +import org.apache.flink.runtime.checkpoint.CompletedCheckpointStats; +import org.apache.flink.runtime.checkpoint.FailedCheckpointStats; +import org.apache.flink.runtime.checkpoint.TaskStateStats; +import org.apache.flink.runtime.jobgraph.JobVertexID; +import org.apache.flink.runtime.rest.messages.ResponseBody; +import org.apache.flink.runtime.rest.messages.json.JobVertexIDDeserializer; +import org.apache.flink.runtime.rest.messages.json.JobVertexIDSerializer; +import org.apache.flink.util.Preconditions; + +import com.fasterxml.jackson.annotation.JsonCreator; +import com.fasterxml.jackson.annotation.JsonInclude; +import com.fasterxml.jackson.annotation.JsonProperty; +import com.fasterxml.jackson.annotation.JsonSubTypes; +import com.fasterxml.jackson.annotation.JsonTypeInfo; +import com.fasterxml.jackson.databind.annotation.JsonDeserialize; +import com.fasterxml.jackson.databind.annotation.JsonSerialize; + +import javax.annotation.Nullable; + +import java.util.Collection; +import java.util.HashMap; +import java.util.Map; +import java.util.Objects; + +/** + * Statistics for a checkpoint. + */ +@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "@class") +@JsonSubTypes({ + @JsonSubTypes.Type(value = CheckpointStatistics.CompletedCheckpointStatistics.class, name = "completed"), + @JsonSubTypes.Type(value = CheckpointStatistics.FailedCheckpointStatistics.class, name = "failed")}) +@JsonInclude(JsonInclude.Include.NON_NULL) --- End diff -- We could annotate the particular field instead of the class.
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