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Apache ZooKeeper Server Source Code
Apache ZooKeeper is an open-source server which enables highly reliable distributed coordination.
Apache ZooKeeper Server Source Code files are provided in the source package file, apache-zookeeper-3.8.0.tar.gz.
You can download apache-zookeeper-3.8.0.tar.gz as described in the previous tutorial and go to the "zookeeper-server" sub-folder to view Apache ZooKeeper Server Source Code files.
You can also browse Apache ZooKeeper Server Source Code below:
✍: FYIcenter.com
⏎ org/apache/zookeeper/server/util/QuotaMetricsUtils.java
/* * 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.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; } private 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 String[] children; synchronized (node) { children = node.getChildren().toArray(new String[0]); } if (children.length == 0) { if (shouldCollect(path, type)) { collectQuotaLimitOrUsage(path, node, metricsMap, type); } return; } for (final String child : children) { getQuotaLimitOrUsage(path + "/" + child, metricsMap, type, dataTree); } } static boolean shouldCollect(final String path, final QUOTA_LIMIT_USAGE_METRIC_TYPE type) { return path.endsWith(LIMIT_END_STRING) && (QUOTA_LIMIT_USAGE_METRIC_TYPE.QUOTA_COUNT_LIMIT == type || QUOTA_LIMIT_USAGE_METRIC_TYPE.QUOTA_BYTES_LIMIT == type) || path.endsWith(STATS_END_STRING) && (QUOTA_LIMIT_USAGE_METRIC_TYPE.QUOTA_COUNT_USAGE == type || QUOTA_LIMIT_USAGE_METRIC_TYPE.QUOTA_BYTES_USAGE == type); } static void collectQuotaLimitOrUsage(final String path, final DataNode node, final Map<String, Number> metricsMap, final QUOTA_LIMIT_USAGE_METRIC_TYPE type) { final String namespace = PathUtils.getTopNamespace(Quotas.trimQuotaPath(path)); if (namespace == null) { return; } final byte[] data = node.getData(); if (data == null) { return; } final StatsTrack statsTrack = new StatsTrack(data); switch (type) { case QUOTA_COUNT_LIMIT: aggregateQuotaLimitOrUsage(namespace, metricsMap, getQuotaLimit(statsTrack.getCountHardLimit(), statsTrack.getCount())); break; case QUOTA_BYTES_LIMIT: aggregateQuotaLimitOrUsage(namespace, metricsMap, getQuotaLimit(statsTrack.getByteHardLimit(), statsTrack.getBytes())); break; case QUOTA_COUNT_USAGE: aggregateQuotaLimitOrUsage(namespace, metricsMap, statsTrack.getCount()); break; case QUOTA_BYTES_USAGE: aggregateQuotaLimitOrUsage(namespace, metricsMap, statsTrack.getBytes()); break; default: } } // hard limit takes precedence if specified static long getQuotaLimit(final long hardLimit, final long limit) { return hardLimit > -1 ? hardLimit : limit; } private static void aggregateQuotaLimitOrUsage(final String namespace, final Map<String, Number> metricsMap, final long limitOrUsage) { metricsMap.put(namespace, metricsMap.getOrDefault(namespace, 0).longValue() + limitOrUsage); } }
⏎ org/apache/zookeeper/server/util/QuotaMetricsUtils.java
Or download all of them as a single archive file:
File name: zookeeper-server-3.8.0-fyi.zip File size: 885581 bytes Release date: 2022-02-25 Download
⇒ Apache ZooKeeper Jute Source Code
⇐ Download and Install Apache ZooKeeper Source Package
2022-11-16, 13829👍, 0💬
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