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optimize BuildTree of ClassLoader -t #2845

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optimize BuildTree of ClassLoader -t #2845

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26 changes: 16 additions & 10 deletions core/src/main/java/com/taobao/arthas/core/command/klass100/ClassLoaderCommand.java
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Original file line number Diff line number Diff line change
Expand Up @@ -449,31 +449,37 @@ private Map<ClassLoaderVO, ClassLoaderUrlStat> urlStats(Instrumentation inst) {

// 以树状列出ClassLoader的继承结构
private static List<ClassLoaderVO> processClassLoaderTree(List<ClassLoaderVO> classLoaders) {
List<ClassLoaderVO> rootClassLoaders = new ArrayList<ClassLoaderVO>();
List<ClassLoaderVO> parentNotNullClassLoaders = new ArrayList<ClassLoaderVO>();
List<ClassLoaderVO> rootClassLoaders = new ArrayList<>();
Map<String, List<ClassLoaderVO>> childMap = new HashMap<>();

// 分离根节点和非根节点，并构建父子关系映射
for (ClassLoaderVO classLoaderVO : classLoaders) {
if (classLoaderVO.getParent() == null) {
rootClassLoaders.add(classLoaderVO);
} else {
parentNotNullClassLoaders.add(classLoaderVO);
childMap.computeIfAbsent(classLoaderVO.getParent(), k -> new ArrayList<>()).add(classLoaderVO);
}
}

for (ClassLoaderVO classLoaderVO : rootClassLoaders) {
buildTree(classLoaderVO, parentNotNullClassLoaders);
// 构建树
for (ClassLoaderVO root : rootClassLoaders) {
buildTree(root, childMap);
}

return rootClassLoaders;
}

private static void buildTree(ClassLoaderVO parent, List<ClassLoaderVO> parentNotNullClassLoaders) {
for (ClassLoaderVO classLoaderVO : parentNotNullClassLoaders) {
if (parent.getName().equals(classLoaderVO.getParent())){
parent.addChild(classLoaderVO);
buildTree(classLoaderVO, parentNotNullClassLoaders);
private static void buildTree(ClassLoaderVO parent, Map<String, List<ClassLoaderVO>> childMap) {
List<ClassLoaderVO> children = childMap.get(parent.getName());
if (children != null) {
for (ClassLoaderVO child : children) {
parent.addChild(child);
buildTree(child, childMap);
}
}
}


private static Set<ClassLoader> getAllClassLoaders(Instrumentation inst, Filter... filters) {
Set<ClassLoader> classLoaderSet = new HashSet<ClassLoader>();

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