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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.zookeeper.metrics;
import java.util.HashMap;
import java.util.Map;
import org.apache.zookeeper.server.ServerMetrics;
/**
* Utility for Metrics in tests.
*/
public abstract class MetricsUtils {
private MetricsUtils() {
}
/**
* Collect all metrics from a {@link MetricsProvider}. A MetricsProvider
* provides a {@link MetricsProvider#dump(java.util.function.BiConsumer)
* }
* method, that method will in general be more efficient and it does not
* impose to the MetricsProvider to waste resources.
*
* @param metricsProvider
* @return a Map which collects one entry per each different key returned by
* {@link MetricsProvider#dump(java.util.function.BiConsumer) }
*/
public static Map<String, Object> collect(MetricsProvider metricsProvider) {
Map<String, Object> res = new HashMap<>();
metricsProvider.dump(res::put);
return res;
}
/**
* Collect current {@link ServerMetrics} as a Map.
*
* @return a flattened view of all metrics reported by the MetricsProvider
* in use by the current ServerMetrics static instance.
*/
public static Map<String, Object> currentServerMetrics() {
return collect(ServerMetrics.getMetrics().getMetricsProvider());
}
}
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