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/*
 * 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;

import org.apache.flink.runtime.execution.ExecutionState;
import org.apache.flink.runtime.rest.handler.job.SubtasksTimesHandler;

import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonCreator;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonIgnore;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonProperty;

import java.util.List;
import java.util.Map;
import java.util.Objects;

import static org.apache.flink.util.Preconditions.checkNotNull;

/** Response type of the {@link SubtasksTimesHandler}. */
public class SubtasksTimesInfo implements ResponseBody {

    public static final String FIELD_NAME_ID = "id";
    public static final String FIELD_NAME_NAME = "name";
    public static final String FIELD_NAME_NOW = "now";
    public static final String FIELD_NAME_SUBTASKS = "subtasks";

    @JsonProperty(FIELD_NAME_ID)
    private final String id;

    @JsonProperty(FIELD_NAME_NAME)
    private final String name;

    @JsonProperty(FIELD_NAME_NOW)
    private final long now;

    @JsonProperty(FIELD_NAME_SUBTASKS)
    private final List subtasks;

    @JsonCreator
    public SubtasksTimesInfo(
            @JsonProperty(FIELD_NAME_ID) String id,
            @JsonProperty(FIELD_NAME_NAME) String name,
            @JsonProperty(FIELD_NAME_NOW) long now,
            @JsonProperty(FIELD_NAME_SUBTASKS) List subtasks) {
        this.id = checkNotNull(id);
        this.name = checkNotNull(name);
        this.now = now;
        this.subtasks = checkNotNull(subtasks);
    }

    @JsonIgnore
    public String getId() {
        return id;
    }

    @JsonIgnore
    public String getName() {
        return name;
    }

    @JsonIgnore
    public long getNow() {
        return now;
    }

    @JsonIgnore
    public List getSubtasks() {
        return subtasks;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }

        if (o == null || this.getClass() != o.getClass()) {
            return false;
        }

        SubtasksTimesInfo that = (SubtasksTimesInfo) o;
        return Objects.equals(id, that.id)
                && Objects.equals(name, that.name)
                && now == that.now
                && Objects.equals(subtasks, that.subtasks);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id, name, now, subtasks);
    }

    // ---------------------------------------------------------------------------------
    // Static helper classes
    // ---------------------------------------------------------------------------------

    /** Nested class to encapsulate the sub task times info. */
    public static final class SubtaskTimeInfo {

        public static final String FIELD_NAME_SUBTASK = "subtask";
        public static final String FIELD_NAME_ENDPOINT = "endpoint";
        public static final String FIELD_NAME_DURATION = "duration";
        public static final String FIELD_NAME_TIMESTAMPS = "timestamps";

        @JsonProperty(FIELD_NAME_SUBTASK)
        private final int subtask;

        @JsonProperty(FIELD_NAME_ENDPOINT)
        private final String endpoint;

        @JsonProperty(FIELD_NAME_DURATION)
        private final long duration;

        @JsonProperty(FIELD_NAME_TIMESTAMPS)
        private final Map timestamps;

        public SubtaskTimeInfo(
                @JsonProperty(FIELD_NAME_SUBTASK) int subtask,
                @JsonProperty(FIELD_NAME_ENDPOINT) String endpoint,
                @JsonProperty(FIELD_NAME_DURATION) long duration,
                @JsonProperty(FIELD_NAME_TIMESTAMPS) Map timestamps) {
            this.subtask = subtask;
            this.endpoint = checkNotNull(endpoint);
            this.duration = duration;
            this.timestamps = checkNotNull(timestamps);
        }

        @JsonIgnore
        public int getSubtask() {
            return subtask;
        }

        @JsonIgnore
        public String getEndpoint() {
            return endpoint;
        }

        @JsonIgnore
        public long getDuration() {
            return duration;
        }

        @JsonIgnore
        public Map getTimestamps() {
            return timestamps;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }

            if (null == o || this.getClass() != o.getClass()) {
                return false;
            }

            SubtaskTimeInfo that = (SubtaskTimeInfo) o;
            return subtask == that.subtask
                    && Objects.equals(endpoint, that.endpoint)
                    && duration == that.duration
                    && Objects.equals(timestamps, that.timestamps);
        }

        @Override
        public int hashCode() {
            return Objects.hash(subtask, endpoint, duration, timestamps);
        }
    }
}