mirror of https://github.com/longtai-cn/hippo4j
organize the toolkit, add references and reference sources (#835)
* fix : organize the toolkit, add references and reference sources * fix : add MemoryUtil for get memory info * fix : code format adjustmentpull/840/head
pizihao
2 years ago
committed by
GitHub
parent
8e397741d1
commit
8eaf587f6a
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cn.hippo4j.common.toolkit;
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import lombok.AccessLevel;
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import lombok.NoArgsConstructor;
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import java.lang.management.ManagementFactory;
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import java.lang.management.MemoryMXBean;
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import java.lang.management.MemoryUsage;
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/**
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* memory util<br>
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* the obtained information is not invalid, after a long wait, obtain it again
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*
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* @author liuwenhao
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*/
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@NoArgsConstructor(access = AccessLevel.PRIVATE)
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public class MemoryUtil {
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static MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
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static MemoryUsage heapMemoryUsage = memoryMXBean.getHeapMemoryUsage();
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static MemoryUsage noHeapMemoryUsage = memoryMXBean.getNonHeapMemoryUsage();
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/**
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* get used memory in heap
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*
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* @return long bytes
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*/
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public static long heapMemoryUsed() {
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return heapMemoryUsage.getUsed();
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}
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/**
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* get max memory in heap
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*
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* @return long bytes
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*/
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public static long heapMemoryMax() {
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return heapMemoryUsage.getMax();
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}
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/**
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* get free memory in heap
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*
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* @return long bytes
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*/
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public static long heapMemoryFree() {
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return Math.subtractExact(heapMemoryMax(), heapMemoryUsed());
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}
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/**
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* get used memory in no-heap
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*
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* @return long bytes
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*/
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public static long noHeapMemoryUsed() {
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return noHeapMemoryUsage.getUsed();
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}
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/**
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* get max memory in no-heap
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*
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* @return long bytes
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*/
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public static long noHeapMemoryMax() {
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return noHeapMemoryUsage.getMax();
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}
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/**
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* get free memory in no-heap
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*
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* @return long bytes
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*/
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public static long noHeapMemoryFree() {
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return Math.subtractExact(noHeapMemoryMax(), noHeapMemoryUsed());
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}
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}
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@ -0,0 +1,60 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cn.hippo4j.common.toolkit;
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import org.junit.Assert;
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import org.junit.Test;
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public class MemoryUtilTest {
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@Test
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public void heapMemoryUsed() {
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long memoryUsed = MemoryUtil.heapMemoryUsed();
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Assert.assertNotEquals(0, memoryUsed);
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}
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@Test
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public void heapMemoryMax() {
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long memoryUsed = MemoryUtil.heapMemoryMax();
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Assert.assertNotEquals(0, memoryUsed);
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}
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@Test
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public void heapMemoryFree() {
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long memoryUsed = MemoryUtil.heapMemoryFree();
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Assert.assertNotEquals(0, memoryUsed);
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}
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@Test
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public void noHeapMemoryUsed() {
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long memoryUsed = MemoryUtil.noHeapMemoryUsed();
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Assert.assertNotEquals(0, memoryUsed);
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}
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@Test
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public void noHeapMemoryMax() {
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long memoryUsed = MemoryUtil.noHeapMemoryMax();
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Assert.assertNotEquals(0, memoryUsed);
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}
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@Test
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public void noHeapMemoryFree() {
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long memoryUsed = MemoryUtil.noHeapMemoryFree();
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Assert.assertNotEquals(0, memoryUsed);
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}
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}
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@ -1,82 +0,0 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cn.hippo4j.config.toolkit;
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import cn.hippo4j.common.toolkit.CollectionUtil;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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import java.util.function.BiFunction;
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/**
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* Map util.
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*/
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public class MapUtil {
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public static Object computeIfAbsent(Map target, Object key, BiFunction mappingFunction, Object param1, Object param2) {
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Objects.requireNonNull(target, "target");
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Objects.requireNonNull(key, "key");
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Objects.requireNonNull(mappingFunction, "mappingFunction");
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Objects.requireNonNull(param1, "param1");
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Objects.requireNonNull(param2, "param2");
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Object val = target.get(key);
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if (val == null) {
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Object ret = mappingFunction.apply(param1, param2);
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target.put(key, ret);
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return ret;
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}
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return val;
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}
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/**
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* Fuzzy matching based on Key.
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*
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* @param sourceMap
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* @param filters
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* @return
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*/
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public static List<String> parseMapForFilter(Map<String, ?> sourceMap, String filters) {
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List<String> resultList = new ArrayList<>();
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if (CollectionUtil.isEmpty(sourceMap)) {
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return resultList;
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}
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sourceMap.forEach((key, val) -> {
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if (checkKey(key, filters)) {
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resultList.add(key);
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}
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});
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return resultList;
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}
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/**
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* Match the characters you want to query.
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*
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* @param key
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* @param filters
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* @return
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*/
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private static boolean checkKey(String key, String filters) {
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if (key.indexOf(filters) > -1) {
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return true;
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} else {
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return false;
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}
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}
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}
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