/
SearchMethodCommand.java
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/
SearchMethodCommand.java
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package com.taobao.arthas.core.command.klass100;
import java.lang.instrument.Instrumentation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.Set;
import java.util.Collection;
import java.util.List;
import com.alibaba.arthas.deps.org.slf4j.Logger;
import com.alibaba.arthas.deps.org.slf4j.LoggerFactory;
import com.taobao.arthas.core.command.Constants;
import com.taobao.arthas.core.command.model.SearchMethodModel;
import com.taobao.arthas.core.command.model.MethodVO;
import com.taobao.arthas.core.command.model.RowAffectModel;
import com.taobao.arthas.core.command.model.ClassLoaderVO;
import com.taobao.arthas.core.shell.cli.Completion;
import com.taobao.arthas.core.shell.cli.CompletionUtils;
import com.taobao.arthas.core.shell.command.AnnotatedCommand;
import com.taobao.arthas.core.shell.command.CommandProcess;
import com.taobao.arthas.core.util.ClassUtils;
import com.taobao.arthas.core.util.ClassLoaderUtils;
import com.taobao.arthas.core.util.SearchUtils;
import com.taobao.arthas.core.util.StringUtils;
import com.taobao.arthas.core.util.affect.RowAffect;
import com.taobao.arthas.core.util.matcher.Matcher;
import com.taobao.arthas.core.util.matcher.RegexMatcher;
import com.taobao.arthas.core.util.matcher.WildcardMatcher;
import com.taobao.middleware.cli.annotations.Argument;
import com.taobao.middleware.cli.annotations.Description;
import com.taobao.middleware.cli.annotations.Name;
import com.taobao.middleware.cli.annotations.Option;
import com.taobao.middleware.cli.annotations.Summary;
/**
* 展示方法信息
*
* @author vlinux
* @author hengyunabc 2019-02-13
*/
@Name("sm")
@Summary("Search the method of classes loaded by JVM")
@Description(Constants.EXAMPLE +
" sm java.lang.String\n" +
" sm -d org.apache.commons.lang.StringUtils\n" +
" sm -d org/apache/commons/lang/StringUtils\n" +
" sm *StringUtils *\n" +
" sm -Ed org\\\\.apache\\\\.commons\\\\.lang\\.StringUtils .*\n" +
Constants.WIKI + Constants.WIKI_HOME + "sm")
public class SearchMethodCommand extends AnnotatedCommand {
private static final Logger logger = LoggerFactory.getLogger(SearchMethodCommand.class);
private String classPattern;
private String methodPattern;
private String hashCode = null;
private String classLoaderClass;
private boolean isDetail = false;
private boolean isRegEx = false;
private int numberOfLimit = 100;
@Argument(argName = "class-pattern", index = 0)
@Description("Class name pattern, use either '.' or '/' as separator")
public void setClassPattern(String classPattern) {
this.classPattern = classPattern;
}
@Argument(argName = "method-pattern", index = 1, required = false)
@Description("Method name pattern")
public void setMethodPattern(String methodPattern) {
this.methodPattern = methodPattern;
}
@Option(shortName = "d", longName = "details", flag = true)
@Description("Display the details of method")
public void setDetail(boolean detail) {
isDetail = detail;
}
@Option(shortName = "E", longName = "regex", flag = true)
@Description("Enable regular expression to match (wildcard matching by default)")
public void setRegEx(boolean regEx) {
isRegEx = regEx;
}
@Option(shortName = "c", longName = "classloader")
@Description("The hash code of the special class's classLoader")
public void setHashCode(String hashCode) {
this.hashCode = hashCode;
}
@Option(longName = "classLoaderClass")
@Description("The class name of the special class's classLoader.")
public void setClassLoaderClass(String classLoaderClass) {
this.classLoaderClass = classLoaderClass;
}
@Option(shortName = "n", longName = "limits")
@Description("Maximum number of matching classes (100 by default)")
public void setNumberOfLimit(int numberOfLimit) {
this.numberOfLimit = numberOfLimit;
}
@Override
public void process(CommandProcess process) {
RowAffect affect = new RowAffect();
Instrumentation inst = process.session().getInstrumentation();
Matcher<String> methodNameMatcher = methodNameMatcher();
if (hashCode == null && classLoaderClass != null) {
List<ClassLoader> matchedClassLoaders = ClassLoaderUtils.getClassLoaderByClassName(inst, classLoaderClass);
if (matchedClassLoaders.size() == 1) {
hashCode = Integer.toHexString(matchedClassLoaders.get(0).hashCode());
} else if (matchedClassLoaders.size() > 1) {
Collection<ClassLoaderVO> classLoaderVOList = ClassUtils.createClassLoaderVOList(matchedClassLoaders);
SearchMethodModel searchmethodModel = new SearchMethodModel()
.setClassLoaderClass(classLoaderClass)
.setMatchedClassLoaders(classLoaderVOList);
process.appendResult(searchmethodModel);
process.end(-1, "Found more than one classloader by class name, please specify classloader with '-c <classloader hash>'");
return;
} else {
process.end(-1, "Can not find classloader by class name: " + classLoaderClass + ".");
return;
}
}
Set<Class<?>> matchedClasses = SearchUtils.searchClass(inst, classPattern, isRegEx, hashCode);
if (numberOfLimit > 0 && matchedClasses.size() > numberOfLimit) {
process.end(-1, "The number of matching classes is greater than : " + numberOfLimit+". \n" +
"Please specify a more accurate 'class-patten' or use the parameter '-n' to change the maximum number of matching classes.");
return;
}
for (Class<?> clazz : matchedClasses) {
try {
for (Constructor<?> constructor : clazz.getDeclaredConstructors()) {
if (!methodNameMatcher.matching("<init>")) {
continue;
}
MethodVO methodInfo = ClassUtils.createMethodInfo(constructor, clazz, isDetail);
process.appendResult(new SearchMethodModel(methodInfo, isDetail));
affect.rCnt(1);
}
for (Method method : clazz.getDeclaredMethods()) {
if (!methodNameMatcher.matching(method.getName())) {
continue;
}
MethodVO methodInfo = ClassUtils.createMethodInfo(method, clazz, isDetail);
process.appendResult(new SearchMethodModel(methodInfo, isDetail));
affect.rCnt(1);
}
} catch (Error e) {
//print failed className
String msg = String.format("process class failed: %s, error: %s", clazz.getName(), e.toString());
logger.error(msg, e);
process.end(1, msg);
return;
}
}
process.appendResult(new RowAffectModel(affect));
process.end();
}
private Matcher<String> methodNameMatcher() {
// auto fix default methodPattern
if (StringUtils.isBlank(methodPattern)) {
methodPattern = isRegEx ? ".*" : "*";
}
return isRegEx ? new RegexMatcher(methodPattern) : new WildcardMatcher(methodPattern);
}
@Override
public void complete(Completion completion) {
int argumentIndex = CompletionUtils.detectArgumentIndex(completion);
if (argumentIndex == 1) {
if (!CompletionUtils.completeClassName(completion)) {
super.complete(completion);
}
return;
} else if (argumentIndex == 2) {
if (!CompletionUtils.completeMethodName(completion)) {
super.complete(completion);
}
return;
}
super.complete(completion);
}
}