ztzg commented on a change in pull request #1644: URL: https://github.com/apache/zookeeper/pull/1644#discussion_r632069739
########## File path: zookeeper-server/src/main/java/org/apache/zookeeper/server/util/QuotaMetricsUtils.java ########## @@ -0,0 +1,169 @@ +/* + * 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.server.util; + +import java.util.ArrayList; +import java.util.List; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; +import org.apache.zookeeper.Quotas; +import org.apache.zookeeper.StatsTrack; +import org.apache.zookeeper.common.PathUtils; +import org.apache.zookeeper.server.DataNode; +import org.apache.zookeeper.server.DataTree; + +public final class QuotaMetricsUtils { + public static final String QUOTA_COUNT_LIMIT_PER_NAMESPACE = "quota_count_limit_per_namespace"; + public static final String QUOTA_BYTES_LIMIT_PER_NAMESPACE = "quota_bytes_limit_per_namespace"; + public static final String QUOTA_COUNT_USAGE_PER_NAMESPACE = "quota_count_usage_per_namespace"; + public static final String QUOTA_BYTES_USAGE_PER_NAMESPACE = "quota_bytes_usage_per_namespace"; + public static final String QUOTA_EXCEEDED_ERROR_PER_NAMESPACE = "quota_exceeded_error_per_namespace"; + + enum QUOTA_LIMIT_USAGE_METRIC_TYPE {QUOTA_COUNT_LIMIT, QUOTA_BYTES_LIMIT, QUOTA_COUNT_USAGE, QUOTA_BYTES_USAGE} + static final String LIMIT_END_STRING = "/" + Quotas.limitNode; + static final String STATS_END_STRING = "/" + Quotas.statNode; + + private QuotaMetricsUtils() { + } + + /** + * Traverse the quota subtree and return per namespace quota count limit + * + * @param dataTree dataTree that contains the quota limit and usage data + * @return a map with top namespace as the key and quota count limit as the value + * + */ + public static Map<String, Number> getQuotaCountLimit(final DataTree dataTree) { + return getQuotaLimitOrUsage(dataTree, QUOTA_LIMIT_USAGE_METRIC_TYPE.QUOTA_COUNT_LIMIT); + } + + /** + * Traverse the quota subtree and return per namespace quota bytes limit + *` + * @param dataTree dataTree that contains the quota limit and usage data + * @return a map with top namespace as the key and quota bytes limit as the value + * + */ + public static Map<String, Number> getQuotaBytesLimit(final DataTree dataTree) { + return getQuotaLimitOrUsage(dataTree, QUOTA_LIMIT_USAGE_METRIC_TYPE.QUOTA_BYTES_LIMIT); + } + + /** + * Traverse the quota subtree and return per namespace quota count usage + * + * @param dataTree dataTree that contains the quota limit and usage data + * @return a map with top namespace as the key and quota count usage as the value + * + */ + public static Map<String, Number> getQuotaCountUsage(final DataTree dataTree) { + return getQuotaLimitOrUsage(dataTree, QUOTA_LIMIT_USAGE_METRIC_TYPE.QUOTA_COUNT_USAGE); + } + + /** + * Traverse the quota subtree and return per namespace quota bytes usage + * + * @param dataTree dataTree that contains the quota limit and usage data + * @return a map with top namespace as the key and quota bytes usage as the value + * + */ + public static Map<String, Number> getQuotaBytesUsage(final DataTree dataTree) { + return getQuotaLimitOrUsage(dataTree, QUOTA_LIMIT_USAGE_METRIC_TYPE.QUOTA_BYTES_USAGE); + } + + // traverse the quota subtree and read the quota limit or usage data + private static Map<String, Number> getQuotaLimitOrUsage(final DataTree dataTree, + final QUOTA_LIMIT_USAGE_METRIC_TYPE type) { + final Map<String, Number> metricsMap = new ConcurrentHashMap<>(); + if (dataTree != null) { + getQuotaLimitOrUsage(Quotas.quotaZookeeper, metricsMap, type, dataTree); + } + return metricsMap; + } + + static void getQuotaLimitOrUsage(final String path, + final Map<String, Number> metricsMap, + final QUOTA_LIMIT_USAGE_METRIC_TYPE type, + final DataTree dataTree) { + final DataNode node = dataTree.getNode(path); + if (node == null) { + return; + } + final List<String> children; + synchronized (node) { + children = new ArrayList<>(node.getChildren()); + } + if (children.size() == 0) { + if (shouldCollect(path, type)) { + collectQuotaLimitOrUsage(path, node, metricsMap, type); Review comment: Agree. Nit: is there a reason the 4-argument overload is not `private`? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
