[abc-users] AspectBench tracematches extension

From: Alan Teoh <alan.teoh07_at_imperial.ac.uk>
Date: Wed, 13 Feb 2008 11:15:31 +0000

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() {
    public void deposit() {
    public static void main(String[] args) {
        Account a = new Account(1);
        Account a2 = new Account(1);

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
Exception in thread "main" org.aspectj.lang.NoAspectBoundException:
Exception while initializing AccountTM: java.lang.NoClassDefFoundError:
        at AccountTM.aspectOf(AccountTM.aj)
        at Account.main(Account.java:19)
Caused by: java.lang.NoClassDefFoundError:
        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.

Received on Wed Feb 13 2008 - 11:15:40 GMT

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