/**
* Copyright 2015-2016 Red Hat, Inc, and individual contributors.
*
* 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 org.wildfly.swarm.topology.runtime;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.stream.Collectors;
import org.jboss.msc.service.ServiceController;
import org.jboss.msc.service.ServiceTarget;
import org.wildfly.swarm.topology.AdvertisementHandle;
import org.wildfly.swarm.topology.Topology;
import org.wildfly.swarm.topology.TopologyListener;
import org.wildfly.swarm.topology.TopologyMessages;
import org.wildfly.swarm.topology.deployment.RegistrationAdvertiser;
/**
* @author Bob McWhirter
*/
public class TopologyManager implements Topology {
public static final TopologyManager INSTANCE = new TopologyManager();
public void setServiceTarget(ServiceTarget serviceTarget) {
this.serviceTarget = serviceTarget;
}
public synchronized void addListener(TopologyListener listener) {
this.listeners.add(listener);
}
public synchronized void removeListener(TopologyListener listener) {
this.listeners.remove(listener);
}
@Override
public AdvertisementHandle advertise(String name, String... tags) {
ServiceController<Void> httpAdvert =
RegistrationAdvertiser.install(this.serviceTarget, name, "http", Arrays.asList(tags));
ServiceController<Void> httpsAdvert =
RegistrationAdvertiser.install(this.serviceTarget, name, "https", Arrays.asList(tags));
return new AdvertisementHandleImpl(httpAdvert, httpsAdvert);
}
public synchronized Set<Registration> registrationsForSourceKey(String sourceKey) {
Set<Registration> result = Collections.unmodifiableSet(
this.registrations.stream()
.filter(e -> e.getSourceKey().equals(sourceKey))
.collect(Collectors.toSet())
);
return result;
}
public synchronized Set<Registration> registrationsForService(String name) {
Set<Registration> result = Collections.unmodifiableSet(
this.registrations.stream()
.filter(e -> e.getName().equals(name))
.collect(Collectors.toSet())
);
return result;
}
public synchronized Set<Registration> registrationsForService(String name, String tag) {
Set<Registration> result = Collections.unmodifiableSet(
this.registrations.stream()
.filter(e -> e.getName().equals(name) && e.hasTag(tag))
.collect(Collectors.toSet())
);
return result;
}
public synchronized void register(Registration registration) {
if (!this.registrations.contains(registration)) {
this.registrations.add(registration);
fireListeners();
}
}
public synchronized void unregister(Registration registration) {
boolean removed = this.registrations.removeIf(e -> e.equals(registration));
if (removed) {
fireListeners();
}
}
public synchronized void unregisterAll(String sourceKey) {
boolean removed = this.registrations.removeIf(e -> e.getSourceKey().equals(sourceKey));
if (removed) {
fireListeners();
}
}
public synchronized void unregisterAll(String sourceKey, String name) {
boolean removed = this.registrations.removeIf(e -> e.getSourceKey().equals(sourceKey) && e.getName().equals(name));
if (removed) {
fireListeners();
}
}
@Override
public synchronized Map<String, List<Entry>> asMap() {
Map<String, List<Entry>> map = new HashMap<>();
for (Registration registration : this.registrations) {
List<Entry> list = map.get(registration.getName());
if (list == null) {
list = new ArrayList<>();
map.put(registration.getName(), list);
}
list.add(registration);
}
return map;
}
private void fireListeners() {
List<TopologyListener> currentListeners = new ArrayList<>();
currentListeners.addAll(this.listeners);
currentListeners.forEach((e) -> {
executor.execute(() -> {
try {
e.onChange(this);
} catch (Throwable t) {
TopologyMessages.MESSAGES.errorFiringEvent(e.getClass().getName(), t);
removeListener(e);
}
});
});
}
private List<TopologyListener> listeners = new ArrayList<>();
private List<Registration> registrations = new ArrayList<>();
private Executor executor = Executors.newFixedThreadPool(2);
private ServiceTarget serviceTarget;
}