org.apache.flink.runtime.rest.messages.job.metrics.Metric Maven / Gradle / Ivy
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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.job.metrics;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonCreator;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonInclude;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonProperty;
import javax.annotation.Nullable;
import static java.util.Objects.requireNonNull;
/**
* Response type for a Metric and Metric-Value-Pair.
*
* @see org.apache.flink.runtime.rest.handler.legacy.metrics.MetricStore
*/
public class Metric {
private static final String FIELD_NAME_ID = "id";
private static final String FIELD_NAME_VALUE = "value";
@JsonProperty(value = FIELD_NAME_ID, required = true)
private final String id;
/**
* The value of the metric. If null, the field should not show up in the JSON
* representation.
*/
@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonProperty(value = FIELD_NAME_VALUE)
private final String value;
/**
* Creates a new {@link Metric} with a possible value.
*
* @param id Name of the metric.
* @param value Value of the metric. Can be null.
*/
@JsonCreator
public Metric(
final @JsonProperty(value = FIELD_NAME_ID, required = true) String id,
final @Nullable @JsonProperty(FIELD_NAME_VALUE) String value) {
this.id = requireNonNull(id, "id must not be null");
this.value = value;
}
/**
* Creates a new {@link Metric} without a value.
*
* @param id Name of the metric.
*/
public Metric(final String id) {
this(id, null);
}
public String getId() {
return id;
}
public String getValue() {
return value;
}
@Override
public String toString() {
return "Metric{" +
"id='" + id + '\'' +
", value='" + value + '\'' +
'}';
}
}