More information
- The part of the code that’s causing the exception - this is decompiled
from the woven .class file:
public class TThreadPoolServer {
public void serve() {
. . .
TThreadPoolServer.WorkerProcess var13;
TThreadPoolServer.WorkerProcess var10000 = var13 = new
TThreadPoolServer.WorkerProcess(client, (<undefinedtype>)var10);
// The exception says here afterReturning throws the exception
EpredRunnablesCallables.aspectOf().ajc$afterReturning$EpredRunnablesCallables$1$8a935d86(var13);
. . .
}
// inner class
private class WorkerProcess implements Runnable,
InstrumentedRunnableCallable {
public long myid; // inserted by aspectj
. . .
}
}
- Question: how does pertypewithin() work? what’s its scope?
For example, pertypewithin(Runnable+) - does it work every class in the
classpath, even including those in rt.jar? When does it create instance for
every class that implements Runnable (after class loading, on demand, …)?
Thank you!
On May 17, 2018 at 4:36:23 PM, Yongle Zhang ([email protected]) wrote:
Hi,
Problem
I have some aspects trying to insert an ID for every class that implements
Runnable.
My aspects (provided below) works fine for a simple test in which 1) I
wrote my own MyRunnable class implementing Runnable, 2) I have a simple
main function that creates and runs a thread using MyRunnable.
However, when I use it to instrument apache thrift library, it gives me
org.aspectj.lang.NoAspectBoundException exception.
I use compile-time weaving. The compile-time weaving finishes successfully,
and the instrumented .class code shows the aspects was woven. However,
running the instrumented apache thrift lib gives this excetpion:
(MyServer is my simple server implementation using thrift.
TThreadPoolServer is the server class in apache thrift lib.)
org.aspectj.lang.NoAspectBoundException
at EpredPerRunnable.aspectOf(EpredPerRunnable.aj:1)
at
EpredRunnablesCallables.ajc$afterReturning$EpredRunnablesCallables$1$8a935d86(EpredRunnablesCallables.aj:55)
at
org.apache.thrift.server.TThreadPoolServer.serve(TThreadPoolServer.java:168)
at MyServer.StartsimpleServer(MyServer.java:21)
at MyServer.main(MyServer.java:28)
My Aspects
Here are the aspects I wrote:
1) I have a counter for each class implements Runnable using pertypewithin.
privileged aspect PerRunnable
pertypewithin(java.lang.Runnable+)
{
public long counter = 0;
public long getCounter() {
return counter;
}
public void incrementCounter() {
counter++;
}
}
2) I insert an id into each class that implements Runnable using interface.
privileged aspect MyRunnables {
public interface InstrumentedRunnable {}
private long InstrumentedRunnable.myid = -1;
public long InstrumentedRunnable.getMyid() {
return myid;
}
public void InstrumentedRunnable.setMyid(long id) {
myid = id;
}
declare parents: (Runnable)+ implements InstrumentedRunnable;
after() returning(InstrumentedRunnable r):
call(java.lang.Runnable+.new(..)) {
long id = PerRunnable.aspectOf(r.getClass()).getCounter();
r.setMyid(id);
PerRunnable.aspectOf(r.getClass()).incrementCounter();
}
}
3) Part of my scripts that only instruments thrift:
CLASSPATH=$CLASSPATH:~/aspectj1.9/lib/aspectjtools.jar
CLASSPATH=$CLASSPATH:~/aspectj1.9/lib/aspectjrt.jar
AJC=~/aspectj1.9/bin/ajc
echo "Compiling Aspects ..."
$AJC -classpath $CLASSPATH:./lib/libthrift-0.11.0.jar -source 1.8 asp/*.aj
echo "Weaving aspect into thrift lib..."
$AJC -classpath
$CLASSPATH:./lib/servlet-api-2.5.jar:./lib/httpcore-4.4.1.jar:./lib/slf4j-api-1.7.12.jar:./lib/httpclient-4.4.1.jar
-source 1.8 -inpath ./lib/libthrift-0.11.0.jar -aspectpath ./asp/
-outjar ./my-libthrift-0.11.0.jar
4) Part of my scripts that starts the thrift server:
CLASSPATH=$CLASSPATH:~/aspectj1.9/lib/aspectjtools.jar
CLASSPATH=$CLASSPATH:~/aspectj1.9/lib/aspectjrt.jar
java -cp
$CLASSPATH:./asp:./my-add-server.jar:./my-libthrift-0.11.0.jar:./lib/slf4j-api-1.7.12.jar
MyServer
Need Help
1. Has anyone met such problem before? Any guess? Note that these
aspects works for my own Runnable but not for thrift lib. (I can send more
code needed including my test classes and my scripts, but they don’t fit
within an email…)
2. Is there a way to get all aspect instances and what they are matched
to at runtime?
3. Does aspectj has this feature: given 1) a pointcut, 2) the signature
of a target (class/method) I want the pointcut to match, tell me whether
they matched, and if not why.
Thank you for your time and help!
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