add event listener and future completion to generic event manager
parent
3145720f40
commit
ef0a26bbd1
@ -1,5 +1,5 @@
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group = org.xbib
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name = event
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version = 0.0.7
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version = 0.0.8
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org.gradle.warning.mode = ALL
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@ -1,6 +1,4 @@
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package org.xbib.event;
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import java.io.Closeable;
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public interface EventConsumer extends Closeable {
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public interface EventConsumer {
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}
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@ -0,0 +1,37 @@
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package org.xbib.event.bus;
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import java.lang.reflect.Method;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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/**
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* Simple logging handler for subscriber exceptions.
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*/
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final class LoggingHandler implements SubscriberExceptionHandler {
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static final LoggingHandler INSTANCE = new LoggingHandler();
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@Override
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public void handleException(Throwable exception, SubscriberExceptionContext context) {
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Logger logger = logger(context);
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if (logger.isLoggable(Level.SEVERE)) {
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logger.log(Level.SEVERE, message(context), exception);
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}
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}
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private static Logger logger(SubscriberExceptionContext context) {
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return Logger.getLogger(EventBus.class.getName() + "." + context.getEventBus().identifier());
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}
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private static String message(SubscriberExceptionContext context) {
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Method method = context.getSubscriberMethod();
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return "Exception thrown by subscriber method "
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+ method.getName()
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+ '('
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+ method.getParameterTypes()[0].getName()
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+ ')'
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+ " on subscriber "
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+ context.getSubscriber()
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+ " when dispatching event: "
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+ context.getEvent();
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}
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}
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@ -0,0 +1,31 @@
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package org.xbib.event.generic;
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import org.xbib.event.DefaultEvent;
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public class DefaultGenericEvent extends DefaultEvent implements GenericEvent {
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private Listener listener;
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public DefaultGenericEvent() {
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this(null);
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}
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public DefaultGenericEvent(Listener listener) {
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this.listener = listener;
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}
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public DefaultGenericEvent setListener(Listener listener) {
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this.listener = listener;
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return this;
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}
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public Listener getListener() {
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return listener;
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}
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public void received() {
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if (listener != null) {
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listener.listen(this);
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}
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}
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}
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@ -0,0 +1,6 @@
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package org.xbib.event.generic;
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import org.xbib.event.Event;
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public interface GenericEvent extends Event {
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}
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@ -0,0 +1,7 @@
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package org.xbib.event.generic;
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@FunctionalInterface
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public interface Listener {
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void listen(GenericEvent event);
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}
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@ -0,0 +1,80 @@
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package org.xbib.event;
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import org.junit.jupiter.api.Test;
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import org.xbib.event.bus.Subscribe;
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import org.xbib.event.generic.DefaultGenericEvent;
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import org.xbib.event.generic.GenericEvent;
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import org.xbib.settings.Settings;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.ExecutionException;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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public class EventManagerTest {
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private static final Logger logger = Logger.getLogger(EventManagerTest.class.getName());
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@Test
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void testGenericEvents() {
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Settings settings = Settings.settingsBuilder()
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.build();
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TestEventConsumer consumer = new TestEventConsumer();
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EventManager eventManager = EventManager.builder(settings)
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.register(consumer)
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.build();
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eventManager.getGenericEventManager().post(new DefaultGenericEvent(e -> {
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logger.log(Level.INFO, "received event " + e);
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}));
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}
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@Test
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void testGenericEventWithWaitForSubscriber() throws InterruptedException, ExecutionException {
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Settings settings = Settings.settingsBuilder()
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.build();
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TestEventConsumer consumer = new TestEventConsumer();
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EventManager eventManager = EventManager.builder(settings)
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.register(consumer)
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.build();
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CompletableFuture<GenericEvent> future = new CompletableFuture<>();
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eventManager.getGenericEventManager().post(new DefaultGenericEvent(e -> {
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logger.log(Level.INFO, "received event " + e);
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future.complete(e);
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}));
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GenericEvent e = future.get();
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logger.log(Level.INFO, "the event was received with result " + e + ", continuing");
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}
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@Test
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void testGenericEventWithWaitForAllConsumers() throws ExecutionException, InterruptedException {
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Settings settings = Settings.settingsBuilder()
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.build();
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TestEventConsumer consumer1 = new TestEventConsumer();
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TestEventConsumer consumer2 = new TestEventConsumer();
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EventManager eventManager = EventManager.builder(settings)
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.register(consumer1)
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.register(consumer2)
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.loadEventConsumers()
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.build();
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CompletableFuture<Boolean> future = new CompletableFuture<>();
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eventManager.getGenericEventManager().post(new DefaultGenericEvent(e -> {
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logger.log(Level.INFO, "received event " + e);
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}), future);
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Boolean b = future.get();
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if (b != null && b) {
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logger.log(Level.INFO, "the event was received by all consumers, continuing");
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}
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}
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private static class TestEventConsumer implements EventConsumer {
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TestEventConsumer() {
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}
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@Subscribe
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public void onEvent(DefaultGenericEvent event) {
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event.received();
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}
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}
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}
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