I tried to reproduce the situation when AspectManager.addBinding(); blocks and
I found the same problem:
*** Caller.class ***
import org.jboss.aop.Prepare;
@Prepare("all(this)")
public class Caller {
private AspectCreator ac;
public Caller() {
System.out.println("Caller new instance");
ac = new AspectCreator();
}
public void method1() {
System.out.println("Caller.method1()");
}
public void method2() {
System.out.println("Caller.method2()");
}
public void run() {
while(true) {
method1();
method2();
try {
java.util.concurrent.TimeUnit.MILLISECONDS.sleep(4000);
} catch (InterruptedException e) {
e.printStackTrace();
}
ac.setCond();
try {
java.util.concurrent.TimeUnit.MILLISECONDS.sleep(4000);
} catch (InterruptedException e) {
e.printStackTrace();
}
method1();
method2();
}
}
public static void main(String[] args) {
Caller caller = new Caller();
caller.run();
}
}
*** Caller.class end ***
*** AspectCreator.class ***
import org.jboss.aop.AspectManager;
import org.jboss.aop.Prepare;
import org.jboss.aop.advice.AdviceBinding;
import org.jboss.aop.pointcut.ast.ParseException;
import aspects.SimpleInterceptor;
@Prepare ("all(this)")
public class AspectCreator {
private MyThread thread;
private Boolean cond;
public AspectCreator() {
cond = false;
thread = new MyThread();
thread.start();
}
public void setCond() {
synchronized (cond) {
cond = true;
}
}
public boolean getCond() {
synchronized (cond) {
return cond;
}
}
public void injectAspect() {
System.out.println("Injecting aspect");
AdviceBinding binding = null;
try {
binding = new AdviceBinding("execution(*
Caller->method1(..))", null);
System.out.println("Binding created");
} catch (ParseException e) {
e.printStackTrace();
}
binding.addInterceptor(SimpleInterceptor.class);
System.out.println("Interceptor added");
AspectManager.instance().addBinding(binding);
System.out.println("Aspect injected");
}
private class MyThread extends Thread {
public void run() {
while(true) {
try {
java.util.concurrent.TimeUnit.MILLISECONDS.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
boolean value = getCond();
if (value) {
injectAspect();
}
synchronized (cond) {
cond = false;
}
}
}
}
}
*** AspectCreator.class end ***
The directories contain the following files:
./DynamicAOP/bin:
Aopper.class
AspectCreator.class
AspectCreator$MyThread.class
aspects/
Caller.class
./DynamicAOP/bin/aspects:
SimpleInterceptor.class
I run the example with the following command:
$ ./run-load15.sh DynamicAOP/bin/ -aopclasspath
/DynamicAOP/bin/:DynamicAOP/bin/aspects/ Caller
and the output is:
Caller new instance
Caller.method1()
Caller.method2()
Injecting aspect
Binding created
Interceptor added
and then it hangs waiting the return of
AspectManager.instance().addBinding(binding);
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