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MetricRecorder.java
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MetricRecorder.java
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/*
* Copyright 2022 The gRPC Authors
*
* 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 io.grpc.services;
import io.grpc.ExperimentalApi;
import java.util.Collections;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* Implements the service/APIs for Out-of-Band metrics reporting, only for utilization metrics.
* A user should use the public set-APIs to update the server machine's utilization metrics data.
*/
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/9006")
public final class MetricRecorder {
private volatile ConcurrentHashMap<String, Double> metricsData = new ConcurrentHashMap<>();
private volatile double cpuUtilization;
private volatile double memoryUtilization;
public static MetricRecorder newInstance() {
return new MetricRecorder();
}
private MetricRecorder() {}
/**
* Update the metrics value corresponding to the specified key.
*/
public void putUtilizationMetric(String key, double value) {
metricsData.put(key, value);
}
/**
* Replace the whole metrics data using the specified map.
*/
public void setAllUtilizationMetrics(Map<String, Double> metrics) {
metricsData = new ConcurrentHashMap<>(metrics);
}
/**
* Remove the metrics data entry corresponding to the specified key.
*/
public void removeUtilizationMetric(String key) {
metricsData.remove(key);
}
/**
* Update the CPU utilization metrics data.
*/
public void setCpuUtilizationMetric(double value) {
cpuUtilization = value;
}
/**
* Clear the CPU utilization metrics data.
*/
public void clearCpuUtilizationMetric() {
cpuUtilization = 0;
}
/**
* Update the memory utilization metrics data.
*/
public void setMemoryUtilizationMetric(double value) {
memoryUtilization = value;
}
/**
* Clear the memory utilization metrics data.
*/
public void clearMemoryUtilizationMetric() {
memoryUtilization = 0;
}
MetricReport getMetricReport() {
return new MetricReport(cpuUtilization, memoryUtilization,
Collections.emptyMap(), Collections.unmodifiableMap(metricsData));
}
}