private void dispatchMessages() throws IOException {
Iterator<SelectionKey> it = selector.selectedKeys().iterator();
while (it.hasNext()) {
SelectionKey key = it.next();
EventSource source = (EventSource) key.attachment();
if (key.isValid()) {
try {
if (key.isAcceptable()) {
EventSource newSource = source.accept();
if (newSource != null) newSources.add(newSource);
}
if (key.isReadable()) {
source.read();
}
if (key.isWritable()) {
source.write();
}
} catch (CancelledKeyException e) {
}
}
it.remove();
}
for (int i = 0; i < newSources.size(); i++) register(newSources.get(i));
if (!newSources.isEmpty()) newSources.clear();
}
public GradleSourceForBinaryQuery(JavaExtension javaExt) {
if (javaExt == null) throw new NullPointerException("javaExt");
this.javaExt = javaExt;
EventSource eventSource = new EventSource();
this.changes = new ChangeSupport(eventSource);
eventSource.init(this.changes);
}
public static void main(String[] args) {
final EventSource es = new EventSource();
final ResponseHandler rh = new ResponseHandler();
es.addObserver(rh);
Thread th = new Thread(es);
th.start();
}
@Override
public Registration addHandler(final EventHandler<? super TargetEventT> handler) {
if (myHandlers.isEmpty()) {
mySourceHandler =
mySourceEventSource.addHandler(
new EventHandler<SourceEventT>() {
@Override
public void onEvent(SourceEventT item) {
final TargetEventT targetEvent = myFunction.apply(item);
myHandlers.fire(
new ListenerCaller<EventHandler<? super TargetEventT>>() {
@Override
public void call(EventHandler<? super TargetEventT> item) {
item.onEvent(targetEvent);
}
});
}
});
}
final Registration reg = myHandlers.add(handler);
return new Registration() {
@Override
protected void doRemove() {
reg.remove();
if (myHandlers.isEmpty()) {
mySourceHandler.remove();
}
}
};
}
public ThisEscape(EventSource source) {
source.registerListener(
new EventListener() {
public void onEvent(Event e) {
doSomething(e);
}
});
}
@Test
public void test() {
EventSource<Integer> source = new EventSource<>();
SuspendableEventStream<Integer> suspendable = source.pausable();
List<Integer> emitted = new ArrayList<>();
suspendable.subscribe(emitted::add);
source.push(1);
suspendable.suspendWhile(
() -> {
source.push(2);
source.push(3);
});
source.push(4);
assertEquals(Arrays.asList(1, 2, 3, 4), emitted);
}
public void contextDestroyed() {
if (hornetqServer != null) {
eventSource.shutDown();
try {
hornetqServer.stop();
log.info("Hornetq server stopped.");
} catch (Exception e) {
log.error("Error stopping hornetq server", e);
}
}
}
@Override
void writeBody(final BufferedSource in, final BufferedSink out) throws IOException {
out.writeUtf8("retry: " + mRetrySecs + "\n").flush();
mEventSource.connect(new Body(in, out));
}
/**
* The source of the event, such as an AWS service, that triggers AWS Config to evaluate your AWS
* resources.
*
* <p>Returns a reference to this object so that method calls can be chained together.
*
* <p><b>Constraints:</b><br>
* <b>Allowed Values: </b>aws.config
*
* @param eventSource The source of the event, such as an AWS service, that triggers AWS Config to
* evaluate your AWS resources.
* @return A reference to this updated object so that method calls can be chained together.
* @see EventSource
*/
public SourceDetail withEventSource(EventSource eventSource) {
this.eventSource = eventSource.toString();
return this;
}
/**
* The source of the event, such as an AWS service, that triggers AWS Config to evaluate your AWS
* resources.
*
* <p><b>Constraints:</b><br>
* <b>Allowed Values: </b>aws.config
*
* @param eventSource The source of the event, such as an AWS service, that triggers AWS Config to
* evaluate your AWS resources.
* @see EventSource
*/
public void setEventSource(EventSource eventSource) {
this.eventSource = eventSource.toString();
}
public void register(EventSource source) throws IOException {
SelectionKey result = source.register(this);
result.attach(source);
sources.add(source);
}
@Test
public void countDownTest() {
EventSource<Void> src1 = new EventSource<Void>();
EventSource<Void> src2 = new EventSource<Void>();
EventSource<Void> reset = new EventSource<Void>();
BiFunction<Integer, Void, Tuple2<Integer, Optional<String>>> countdown =
(s, i) -> s == 1 ? t(3, Optional.of("COUNTDOWN REACHED")) : t(s - 1, Optional.empty());
EventStream<String> countdowns =
StateMachine.init(3)
.on(src1)
.transmit(countdown)
.on(src2)
.transmit(countdown)
.on(reset)
.transition((s, i) -> 3)
.toEventStream();
Counter counter = new Counter();
Subscription sub = countdowns.hook(x -> counter.inc()).pin();
src1.push(null);
src2.push(null);
assertEquals(0, counter.get());
src1.push(null);
assertEquals(1, counter.getAndReset());
src2.push(null);
src2.push(null);
reset.push(null);
assertEquals(0, counter.get());
src2.push(null);
assertEquals(0, counter.get());
src1.push(null);
assertEquals(0, counter.get());
src2.push(null);
assertEquals(1, counter.getAndReset());
sub.unsubscribe();
src1.push(null);
src1.push(null);
src1.push(null);
src1.push(null);
src1.push(null);
src1.push(null);
assertEquals(0, counter.get());
}
public void contextInitialized(Injector injector) {
org.candlepin.common.config.Configuration candlepinConfig =
injector.getInstance(org.candlepin.common.config.Configuration.class);
if (hornetqServer == null) {
Configuration config = new ConfigurationImpl();
HashSet<TransportConfiguration> transports = new HashSet<TransportConfiguration>();
transports.add(new TransportConfiguration(InVMAcceptorFactory.class.getName()));
config.setAcceptorConfigurations(transports);
// alter the default pass to silence log output
config.setClusterUser(null);
config.setClusterPassword(null);
// in vm, who needs security?
config.setSecurityEnabled(false);
config.setJournalType(JournalType.NIO);
config.setCreateBindingsDir(true);
config.setCreateJournalDir(true);
String baseDir = candlepinConfig.getString(ConfigProperties.HORNETQ_BASE_DIR);
config.setBindingsDirectory(new File(baseDir, "bindings").toString());
config.setJournalDirectory(new File(baseDir, "journal").toString());
config.setLargeMessagesDirectory(new File(baseDir, "largemsgs").toString());
config.setPagingDirectory(new File(baseDir, "paging").toString());
Map<String, AddressSettings> settings = new HashMap<String, AddressSettings>();
AddressSettings pagingConfig = new AddressSettings();
String addressPolicyString =
candlepinConfig.getString(ConfigProperties.HORNETQ_ADDRESS_FULL_POLICY);
long maxQueueSizeInMb = candlepinConfig.getInt(ConfigProperties.HORNETQ_MAX_QUEUE_SIZE);
long maxPageSizeInMb = candlepinConfig.getInt(ConfigProperties.HORNETQ_MAX_PAGE_SIZE);
AddressFullMessagePolicy addressPolicy = null;
if (addressPolicyString.equals("PAGE")) {
addressPolicy = AddressFullMessagePolicy.PAGE;
} else if (addressPolicyString.equals("BLOCK")) {
addressPolicy = AddressFullMessagePolicy.BLOCK;
} else {
throw new IllegalArgumentException(
"Unknown HORNETQ_ADDRESS_FULL_POLICY: "
+ addressPolicyString
+ " . Please use one of: PAGE, BLOCK");
}
// Paging sizes need to be converted to bytes
pagingConfig.setMaxSizeBytes(maxQueueSizeInMb * FileUtils.ONE_MB);
if (addressPolicy == AddressFullMessagePolicy.PAGE) {
pagingConfig.setPageSizeBytes(maxPageSizeInMb * FileUtils.ONE_MB);
}
pagingConfig.setAddressFullMessagePolicy(addressPolicy);
// Enable for all the queues
settings.put("#", pagingConfig);
config.setAddressesSettings(settings);
int maxScheduledThreads =
candlepinConfig.getInt(ConfigProperties.HORNETQ_MAX_SCHEDULED_THREADS);
int maxThreads = candlepinConfig.getInt(ConfigProperties.HORNETQ_MAX_THREADS);
if (maxThreads != -1) {
config.setThreadPoolMaxSize(maxThreads);
}
if (maxScheduledThreads != -1) {
config.setScheduledThreadPoolMaxSize(maxScheduledThreads);
}
/**
* Anything up to size of LARGE_MSG_SIZE may be needed to be written to the Journal, so we
* must set buffer size accordingly.
*
* <p>If buffer size would be < LARGE_MSG_SIZE we may get exceptions such as this: Can't write
* records bigger than the bufferSize(XXXYYY) on the journal
*/
int largeMsgSize = candlepinConfig.getInt(ConfigProperties.HORNETQ_LARGE_MSG_SIZE);
config.setJournalBufferSize_AIO(largeMsgSize);
config.setJournalBufferSize_NIO(largeMsgSize);
hornetqServer = new EmbeddedHornetQ();
hornetqServer.setConfiguration(config);
}
try {
hornetqServer.start();
log.info("Hornetq server started");
} catch (Exception e) {
log.error("Failed to start hornetq message server:", e);
throw new RuntimeException(e);
}
setupAmqp(injector, candlepinConfig);
cleanupOldQueues();
List<String> listeners = getHornetqListeners(candlepinConfig);
eventSource = injector.getInstance(EventSource.class);
for (int i = 0; i < listeners.size(); i++) {
try {
Class<?> clazz = this.getClass().getClassLoader().loadClass(listeners.get(i));
eventSource.registerListener((EventListener) injector.getInstance(clazz));
} catch (Exception e) {
log.warn("Unable to register listener " + listeners.get(i), e);
}
}
// Initialize the Event sink AFTER the internal server has been
// created and started.
EventSink sink = injector.getInstance(EventSink.class);
try {
sink.initialize();
} catch (Exception e) {
log.error("Failed to initialize EventSink:", e);
throw new RuntimeException(e);
}
}
public SimpleEventListener(EventSource source) {
source.registerListener(this);
this.state = 42;
}
