void ObservableTest::testAsyncGarbagCollector() {
BOOST_TEST_MESSAGE("Testing observer pattern with an asynchronous "
"garbage collector (JVM/.NET use case)...");
// This test core dumps if used with the ordinary implementation
// of the observer pattern (comparable situation
// in JVM or .NET eco systems).
const ext::shared_ptr<SimpleQuote> quote(new SimpleQuote(-1.0));
GarbageCollector gc;
boost::thread workerThread(&GarbageCollector::run, &gc);
for (Size i=0; i < 10000; ++i) {
const ext::shared_ptr<MTUpdateCounter> observer(new MTUpdateCounter);
observer->registerWith(quote);
gc.addObj(observer);
for (Size j=0; j < 10; ++j)
quote->setValue(Real(j));
}
gc.terminate();
workerThread.join();
if (MTUpdateCounter::instanceCounter() != 0) {
BOOST_FAIL("garbage collection does not work.");
}
}
void ObservableTest::testMultiThreadingGlobalSettings() {
BOOST_TEST_MESSAGE("Testing observer global settings in a "
"multithreading environment...");
const ext::shared_ptr<SimpleQuote> quote(new SimpleQuote(-1.0));
ObservableSettings::instance().disableUpdates(true);
GarbageCollector gc;
boost::thread workerThread(&GarbageCollector::run, &gc);
typedef std::list<ext::shared_ptr<MTUpdateCounter> > local_list_type;
local_list_type localList;
for (Size i=0; i < 4000; ++i) {
const ext::shared_ptr<MTUpdateCounter> observer(new MTUpdateCounter);
observer->registerWith(quote);
if ((i%4) == 0) {
localList.push_back(observer);
for (Size j=0; j < 5; ++j)
quote->setValue(Real(j));
}
gc.addObj(observer);
}
gc.terminate();
workerThread.join();
if (localList.size() != Size(MTUpdateCounter::instanceCounter())) {
BOOST_FAIL("garbage collection does not work.");
}
for (local_list_type::iterator iter = localList.begin();
iter != localList.end(); ++iter) {
if ((*iter)->counter() != 0) {
BOOST_FAIL("notification should have been blocked");
}
}
ObservableSettings::instance().enableUpdates();
for (local_list_type::iterator iter = localList.begin();
iter != localList.end(); ++iter) {
if ((*iter)->counter() != 1) {
BOOST_FAIL("only one notification should have been sent");
}
}
}
