com.alibaba.jvm.sandbox.module.debug.DebugTraceModule Maven / Gradle / Ivy
package com.alibaba.jvm.sandbox.module.debug;
import com.alibaba.jvm.sandbox.api.Information;
import com.alibaba.jvm.sandbox.api.Module;
import com.alibaba.jvm.sandbox.api.http.Http;
import com.alibaba.jvm.sandbox.api.http.printer.ConcurrentLinkedQueuePrinter;
import com.alibaba.jvm.sandbox.api.http.printer.Printer;
import com.alibaba.jvm.sandbox.api.listener.ext.Advice;
import com.alibaba.jvm.sandbox.api.listener.ext.AdviceListener;
import com.alibaba.jvm.sandbox.api.listener.ext.EventWatchBuilder;
import com.alibaba.jvm.sandbox.api.listener.ext.EventWatcher;
import com.alibaba.jvm.sandbox.api.resource.ModuleEventWatcher;
import com.alibaba.jvm.sandbox.module.debug.textui.TTree;
import org.kohsuke.MetaInfServices;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* 模仿Greys的trace命令
* 测试用模块
*/
@MetaInfServices(Module.class)
@Information(id = "debug-trace", version = "0.0.1", author = "[email protected]")
public class DebugTraceModule extends HttpSupported implements Module {
@Resource
private ModuleEventWatcher moduleEventWatcher;
@Http("/trace")
public void trace(final HttpServletRequest req,
final HttpServletResponse resp) throws IOException {
try {
final String cnPattern = getParameter(req, "class");
final String mnPattern = getParameter(req, "method");
final Printer printer = new ConcurrentLinkedQueuePrinter(resp.getWriter());
debugTrace(cnPattern, mnPattern, printer);
} catch (HttpSupported.HttpErrorCodeException hece) {
resp.sendError(hece.getCode(), hece.getMessage());
return;
}
}
private void debugTrace(final String cnPattern,
final String mnPattern,
final Printer printer) {
final EventWatcher watcher = new EventWatchBuilder(moduleEventWatcher)
.onClass(cnPattern).includeSubClasses()
.onBehavior(mnPattern)
.onWatching().withProgress(new ProgressPrinter(printer)).withCall()
.onWatch(new AdviceListener() {
private String getTracingTitle(final Advice advice) {
return "Tracing for : "
+ advice.getBehavior().getDeclaringClass().getName()
+ "."
+ advice.getBehavior().getName()
+ " by "
+ Thread.currentThread().getName()
;
}
private String getEnterTitle(final Advice advice) {
return "Enter : "
+ advice.getBehavior().getDeclaringClass().getName()
+ "."
+ advice.getBehavior().getName()
+ "(...);"
;
}
@Override
protected void before(Advice advice) throws Throwable {
final TTree tTree;
if (advice.isProcessTop()) {
advice.attach(tTree = new TTree(true, getTracingTitle(advice)));
} else {
tTree = advice.getProcessTop().attachment();
}
tTree.begin(getEnterTitle(advice));
}
@Override
protected void afterReturning(Advice advice) throws Throwable {
final TTree tTree = advice.getProcessTop().attachment();
tTree.end();
finish(advice);
}
@Override
protected void afterThrowing(Advice advice) throws Throwable {
final TTree tTree = advice.getProcessTop().attachment();
tTree.begin("throw:" + advice.getThrowable().getClass().getName() + "()").end();
tTree.end();
finish(advice);
}
private void finish(Advice advice) {
if (advice.isProcessTop()) {
final TTree tTree = advice.attachment();
printer.println(tTree.rendering());
}
}
@Override
protected void beforeCall(final Advice advice,
final int callLineNum,
final String callJavaClassName,
final String callJavaMethodName,
final String callJavaMethodDesc) {
final TTree tTree = advice.getProcessTop().attachment();
tTree.begin(callJavaClassName + ":" + callJavaMethodName + "(@" + callLineNum + ")");
}
@Override
protected void afterCallReturning(final Advice advice,
final int callLineNum,
final String callJavaClassName,
final String callJavaMethodName,
final String callJavaMethodDesc) {
final TTree tTree = advice.getProcessTop().attachment();
tTree.end();
}
@Override
protected void afterCallThrowing(final Advice advice,
final int callLineNum,
final String callJavaClassName,
final String callJavaMethodName,
final String callJavaMethodDesc,
final String callThrowJavaClassName) {
final TTree tTree = advice.getProcessTop().attachment();
tTree.set(tTree.get() + "[throw " + callThrowJavaClassName + "]").end();
}
});
try {
printer.println(String.format(
"tracing on [%s#%s].\nPress CTRL_C about it!",
cnPattern,
mnPattern
));
printer.waitingForBroken();
} finally {
watcher.onUnWatched();
}
}
}