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/*
* Copyright 2015 dorkbox, llc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package dorkbox.messageBus.dispatch;
import dorkbox.messageBus.error.DeadMessage;
import dorkbox.messageBus.error.ErrorHandler;
import dorkbox.messageBus.subscription.Subscription;
import dorkbox.messageBus.subscription.SubscriptionManager;
/**
* By default, it is the calling thread that has to get the subscriptions, which the sync/async logic then uses.
*
* The exception to this rule is when checking/calling DeadMessage publication.
*
* @author dorkbox, llc
* Date: 2/2/15
*/
@SuppressWarnings("Duplicates")
public
class DispatchExact implements Dispatch {
private final ErrorHandler errorHandler;
private final SubscriptionManager subManager;
public
DispatchExact(final ErrorHandler errorHandler, final SubscriptionManager subManager) {
this.errorHandler = errorHandler;
this.subManager = subManager;
}
@Override
public
void publish(final Object message1) {
final ErrorHandler errorHandler = this.errorHandler;
final SubscriptionManager subManager = this.subManager;
final Class messageClass1 = message1.getClass();
final Subscription[] subscriptions = subManager.getSubs(messageClass1); // can return null
Subscription sub;
int subLength;
boolean hasSubs = false;
try {
// Run subscriptions. if the subscriptions are NULL or length == 0, it means we don't have any that were ever subscribed.
if (subscriptions != null && (subLength = subscriptions.length) > 0) {
// even though they are non-null, and have length > 0 --- it is still possible the subscription was REMOVED at some point.
// so there won't be any object/method this publishes to AND there won't be any "dead messages" triggered
for (int i = 0; i < subLength; i++) {
sub = subscriptions[i];
hasSubs |= sub.publish(errorHandler, message1);
}
}
if (!hasSubs) {
// Dead Event must EXACTLY MATCH (no subclasses)
final Subscription[] deadSubscriptions = subManager.getSubs(DeadMessage.class); // can return null
if (deadSubscriptions != null) {
final DeadMessage deadMessage = new DeadMessage(message1);
for (int i = 0; i < deadSubscriptions.length; i++) {
sub = deadSubscriptions[i];
sub.publish(errorHandler, deadMessage);
}
}
}
} catch (DispatchCancel ignored) {
// we wanted to cancel the dispatch for this specific message
}
}
@Override
public
void publish(final Object message1, final Object message2) {
final ErrorHandler errorHandler = this.errorHandler;
final SubscriptionManager subManager = this.subManager;
final Class messageClass1 = message1.getClass();
final Class messageClass2 = message2.getClass();
final Subscription[] subscriptions = subManager.getSubs(messageClass1, messageClass2); // can return null
Subscription sub;
int subLength;
boolean hasSubs = false;
try {
// Run subscriptions. if the subscriptions are NULL or length == 0, it means we don't have any that were ever subscribed.
if (subscriptions != null && (subLength = subscriptions.length) > 0) {
// even though they are non-null, and have length > 0 --- it is still possible the subscription was REMOVED at some point.
// so there won't be any object/method this publishes to AND there won't be any "dead messages" triggered
for (int i = 0; i < subLength; i++) {
sub = subscriptions[i];
hasSubs |= sub.publish(errorHandler, message1, message2);
}
}
if (!hasSubs) {
// Dead Event must EXACTLY MATCH (no subclasses)
final Subscription[] deadSubscriptions = subManager.getSubs(DeadMessage.class); // can return null
if (deadSubscriptions != null) {
final DeadMessage deadMessage = new DeadMessage(message1, message2);
for (int i = 0; i < deadSubscriptions.length; i++) {
sub = deadSubscriptions[i];
sub.publish(errorHandler, deadMessage);
}
}
}
} catch (DispatchCancel ignored) {
// we wanted to cancel the dispatch for these specific messages
}
}
@Override
public
void publish(final Object message1, final Object message2, final Object message3) {
final ErrorHandler errorHandler = this.errorHandler;
final SubscriptionManager subManager = this.subManager;
final Class messageClass1 = message1.getClass();
final Class messageClass2 = message2.getClass();
final Class messageClass3 = message3.getClass();
final Subscription[] subscriptions = subManager.getSubs(messageClass1, messageClass2, messageClass3); // can return null
Subscription sub;
int subLength;
boolean hasSubs = false;
try {
// Run subscriptions. if the subscriptions are NULL or length == 0, it means we don't have any that were ever subscribed.
if (subscriptions != null && (subLength = subscriptions.length) > 0) {
// even though they are non-null, and have length > 0 --- it is still possible the subscription was REMOVED at some point.
// so there won't be any object/method this publishes to AND there won't be any "dead messages" triggered
for (int i = 0; i < subLength; i++) {
sub = subscriptions[i];
hasSubs |= sub.publish(errorHandler, message1, message2, message3);
}
}
if (!hasSubs) {
// Dead Event must EXACTLY MATCH (no subclasses)
final Subscription[] deadSubscriptions = subManager.getSubs(DeadMessage.class); // can return null
if (deadSubscriptions != null) {
final DeadMessage deadMessage = new DeadMessage(message1, message2, message3);
for (int i = 0; i < deadSubscriptions.length; i++) {
sub = deadSubscriptions[i];
sub.publish(errorHandler, deadMessage);
}
}
}
} catch (DispatchCancel ignored) {
// we wanted to cancel the dispatch for these specific messages
}
}
}
