Re: [abc-users] AspectBench tracematches extension

Hi Alan,

Thanks for your interest in tracematches!

Indeed your tracematch declaration looks OK. The problem isn't there, but in
your runtime classpath. The instrumentation generated by the tracematch
implementation relies on a number of utility classes, which are packaged in
the abc-runtime.jar (they are also in abc-complete.jar). Thus, if you make
sure one of these jars is on your classpath when you run the compiled
classes, it should work:

java -cp abc-runtime.jar:$CLASSPATH Account

Please let us know if this resolves your issue.

Best wishes,
- Pavel

On Wednesday 13 February 2008 11:15:31 Alan Teoh wrote:
> Hi there,
>
> I am a student who is currently doing research on aspect oriented
> programming. I am new to tracematches, and I was trying to write an
> example of my own and run it to observe their behaviour.
>
> Source code are as follows:
> class Account {
> private int type; // Integer to determine account type
>
> public Account(int t) {
> this.type = t;
> }
>
> public void withdraw() {
> System.out.println("Withdraw");
> }
>
> public void deposit() {
> System.out.println("Deposit");
> }
> public static void main(String[] args) {
> Account a = new Account(1);
> Account a2 = new Account(1);
>
> a.withdraw();
> a.deposit();
> a2.deposit();
> }
> }
>
> public aspect AccountTM {
> tracematch (Account a) {
> sym wd after:
> call (* Account.withdraw(..)) && target(a);
> sym dp after:
> call (* Account.deposit(..)) && target(a);
>
> wd dp[2]
> {
> System.out.println("1 withdraw and 2 deposit method calls
> made by " + a);
> }
> }
> }
>
> I compiled them using the tracematch extension for abc via the following
> command: "abc -ext abc.tm Account.java AccountTM.aj" (Without quotes)
> When I try to run Account.java, I get the following output:
> H:\java Account
> Withdraw
> Exception in thread "main" org.aspectj.lang.NoAspectBoundException:
> Exception while initializing AccountTM: java.lang.NoClassDefFoundError:
> org/aspect
> bench/tm/runtime/internal/Lock
> at AccountTM.aspectOf(AccountTM.aj)
> at Account.main(Account.java:19)
> Caused by: java.lang.NoClassDefFoundError:
> org/aspectbench/tm/runtime/internal/Lock
> at AccountTM.<init>(AccountTM.aj:1)
> at AccountTM.abc$postClinit(AccountTM.aj)
> at AccountTM.<clinit>(AccountTM.aj)
> ... 1 more
>
> It seems like after the withraw() method call, an exception was thrown.
> I have no clue as to what that error exactly means but it looks like it
> has got something to do with the aspect itself. I have read papers on
> tracematches and it seemed that my tracematch declaration looked OK
> according to its syntax. Could anyone shed a light as to where I have
> gone wrong?
>
> I am using the *Complete compiler jar* (abc-complete.jar) package to
> compile my tracematch.
>
> Thanks.
Received on Wed Feb 13 2008 - 11:20:40 GMT