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Add jar file index to improve mc command compilation speed (#2736)

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pull/2746/head
haiyanghan 1 year ago committed by GitHub
parent 61b0d9ac23
commit 6a43273936
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 161 additions and 36 deletions
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42
memorycompiler/src/main/java/com/taobao/arthas/compiler/ClassUriWrapper.java
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@ -0,0 +1,42 @@
package com.taobao.arthas.compiler;
/*-
* #%L
* compiler
* %%
* Copyright (C) 2017 - 2018 SkaLogs
* %%
* Licensed 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.
* #L%
*/
import java.net.URI;
public class ClassUriWrapper {
private final URI uri;
private final String className;
public ClassUriWrapper(String className, URI uri) {
this.className = className;
this.uri = uri;
}
public URI getUri() {
return uri;
}
public String getClassName() {
return className;
}
}

26
memorycompiler/src/main/java/com/taobao/arthas/compiler/CustomJavaFileObject.java
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@ -23,18 +23,20 @@ package com.taobao.arthas.compiler;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.NestingKind;
import javax.tools.JavaFileObject;
import java.io.*;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.net.URI;
public class CustomJavaFileObject implements JavaFileObject {
private final String binaryName;
private final String className;
private final URI uri;
private final String name;
public CustomJavaFileObject(String binaryName, URI uri) {
public CustomJavaFileObject(String className, URI uri) {
this.uri = uri;
this.binaryName = binaryName;
name = uri.getPath() == null ? uri.getSchemeSpecificPart() : uri.getPath(); // for FS based URI the path is not null, for JAR URI the scheme specific part is not null
this.className = className;
}
public URI toUri() {
@ -50,7 +52,7 @@ public class CustomJavaFileObject implements JavaFileObject {
}
public String getName() {
return name;
return this.className;
}
public Reader openReader(boolean ignoreEncodingErrors) {
@ -78,10 +80,8 @@ public class CustomJavaFileObject implements JavaFileObject {
}
public boolean isNameCompatible(String simpleName, Kind kind) {
String baseName = simpleName + kind.extension;
return kind.equals(getKind())
&& (baseName.equals(getName())
|| getName().endsWith("/" + baseName));
return Kind.CLASS.equals(getKind())
&& this.className.endsWith(simpleName);
}
public NestingKind getNestingKind() {
@ -92,8 +92,8 @@ public class CustomJavaFileObject implements JavaFileObject {
throw new UnsupportedOperationException();
}
public String binaryName() {
return binaryName;
public String getClassName() {
return this.className;
}

5
memorycompiler/src/main/java/com/taobao/arthas/compiler/DynamicJavaFileManager.java
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@ -24,8 +24,7 @@ public class DynamicJavaFileManager extends ForwardingJavaFileManager<JavaFileMa
public DynamicJavaFileManager(JavaFileManager fileManager, DynamicClassLoader classLoader) {
super(fileManager);
this.classLoader = classLoader;
finder = new PackageInternalsFinder(classLoader);
this.finder = new PackageInternalsFinder(classLoader);
}
@Override
@ -53,7 +52,7 @@ public class DynamicJavaFileManager extends ForwardingJavaFileManager<JavaFileMa
@Override
public String inferBinaryName(Location location, JavaFileObject file) {
if (file instanceof CustomJavaFileObject) {
return ((CustomJavaFileObject) file).binaryName();
return ((CustomJavaFileObject) file).getClassName();
} else {
/**
* if it's not CustomJavaFileObject, then it's coming from standard file manager

124
memorycompiler/src/main/java/com/taobao/arthas/compiler/PackageInternalsFinder.java
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@ -28,15 +28,23 @@ import java.net.URI;
import java.net.URL;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.jar.JarEntry;
import java.util.stream.Collectors;
public class PackageInternalsFinder {
private final ClassLoader classLoader;
private static final String CLASS_FILE_EXTENSION = ".class";
private static final Map<String, JarFileIndex> INDEXS = new ConcurrentHashMap<>();
public PackageInternalsFinder(ClassLoader classLoader) {
this.classLoader = classLoader;
}
@ -60,11 +68,30 @@ public class PackageInternalsFinder {
if (directory.isDirectory()) { // browse local .class files - useful for local execution
return processDir(packageName, directory);
} else { // browse a jar file
return processJar(packageFolderURL);
} // maybe there can be something else for more involved class loaders
return processJar(packageName, packageFolderURL);
}
}
private List<JavaFileObject> processJar(String packageName, URL packageFolderURL) {
try {
String jarUri = packageFolderURL.toExternalForm().substring(0, packageFolderURL.toExternalForm().lastIndexOf("!/"));
JarFileIndex jarFileIndex = INDEXS.get(jarUri);
if (jarFileIndex == null) {
jarFileIndex = new JarFileIndex(jarUri, URI.create(jarUri + "!/"));
INDEXS.put(jarUri, jarFileIndex);
}
List<JavaFileObject> result = jarFileIndex.search(packageName);
if (result != null) {
return result;
}
} catch (Exception e) {
// ignore
}
// 保底
return fuse(packageFolderURL);
}
private List<JavaFileObject> processJar(URL packageFolderURL) {
private List<JavaFileObject> fuse(URL packageFolderURL) {
List<JavaFileObject> result = new ArrayList<JavaFileObject>();
try {
String jarUri = packageFolderURL.toExternalForm().substring(0, packageFolderURL.toExternalForm().lastIndexOf("!/"));
@ -92,24 +119,16 @@ public class PackageInternalsFinder {
}
private List<JavaFileObject> processDir(String packageName, File directory) {
List<JavaFileObject> result = new ArrayList<JavaFileObject>();
File[] childFiles = directory.listFiles();
if (childFiles != null) {
for (File childFile : childFiles) {
if (childFile.isFile()) {
// We only want the .class files.
if (childFile.getName().endsWith(CLASS_FILE_EXTENSION)) {
String binaryName = packageName + "." + childFile.getName();
binaryName = binaryName.replaceAll(CLASS_FILE_EXTENSION + "$", "");
result.add(new CustomJavaFileObject(binaryName, childFile.toURI()));
}
}
}
File[] files = directory.listFiles(item ->
item.isFile() && getKind(item.getName()) == JavaFileObject.Kind.CLASS);
if (files != null) {
return Arrays.stream(files).map(item -> {
String className = packageName + "." + item.getName()
.replaceAll(CLASS_FILE_EXTENSION + "$", "");
return new CustomJavaFileObject(className, item.toURI());
}).collect(Collectors.toList());
}
return result;
return Collections.emptyList();
}
private String decode(String filePath) {
@ -121,4 +140,69 @@ public class PackageInternalsFinder {
return filePath;
}
public static JavaFileObject.Kind getKind(String name) {
if (name.endsWith(JavaFileObject.Kind.CLASS.extension))
return JavaFileObject.Kind.CLASS;
else if (name.endsWith(JavaFileObject.Kind.SOURCE.extension))
return JavaFileObject.Kind.SOURCE;
else if (name.endsWith(JavaFileObject.Kind.HTML.extension))
return JavaFileObject.Kind.HTML;
else
return JavaFileObject.Kind.OTHER;
}
public static class JarFileIndex {
private String jarUri;
private URI uri;
private Map<String, List<ClassUriWrapper>> packages = new HashMap<>();
public JarFileIndex(String jarUri, URI uri) throws IOException {
this.jarUri = jarUri;
this.uri = uri;
loadIndex();
}
private void loadIndex() throws IOException {
JarURLConnection jarConn = (JarURLConnection) uri.toURL().openConnection();
String rootEntryName = jarConn.getEntryName() == null ? "" : jarConn.getEntryName();
Enumeration<JarEntry> entryEnum = jarConn.getJarFile().entries();
while (entryEnum.hasMoreElements()) {
JarEntry jarEntry = entryEnum.nextElement();
String entryName = jarEntry.getName();
if (entryName.startsWith(rootEntryName) && entryName.endsWith(CLASS_FILE_EXTENSION)) {
String className = entryName
.substring(0, entryName.length() - CLASS_FILE_EXTENSION.length())
.replace(rootEntryName, "")
.replace("/", ".");
if (className.startsWith(".")) className = className.substring(1);
if (className.equals("package-info")
|| className.equals("module-info")
|| className.lastIndexOf(".") == -1) {
continue;
}
String packageName = className.substring(0, className.lastIndexOf("."));
List<ClassUriWrapper> classes = packages.get(packageName);
if (classes == null) {
classes = new ArrayList<>();
packages.put(packageName, classes);
}
classes.add(new ClassUriWrapper(className, URI.create(jarUri + "!/" + entryName)));
}
}
}
public List<JavaFileObject> search(String packageName) {
if (this.packages.isEmpty()) {
return null;
}
if (this.packages.containsKey(packageName)) {
return packages.get(packageName).stream().map(item -> {
return new CustomJavaFileObject(item.getClassName(), item.getUri());
}).collect(Collectors.toList());
}
return Collections.emptyList();
}
}
}

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