com.alibaba.nacos.common.trace.publisher.TraceEventPublisherFactory Maven / Gradle / Ivy
/*
* Copyright 1999-2020 Alibaba Group Holding Ltd.
*
* 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 com.alibaba.nacos.common.trace.publisher;
import com.alibaba.nacos.common.notify.Event;
import com.alibaba.nacos.common.notify.EventPublisher;
import com.alibaba.nacos.common.notify.EventPublisherFactory;
import com.alibaba.nacos.common.trace.event.TraceEvent;
import com.alibaba.nacos.common.utils.ConcurrentHashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/**
* event publisher factory for trace event.
*
* @author yanda
*/
public class TraceEventPublisherFactory implements EventPublisherFactory {
private static final TraceEventPublisherFactory INSTANCE = new TraceEventPublisherFactory();
private final Map, TraceEventPublisher> publisher;
private final Set> publisherEvents;
private TraceEventPublisherFactory() {
publisher = new ConcurrentHashMap<>();
publisherEvents = new ConcurrentHashSet<>();
}
public static TraceEventPublisherFactory getInstance() {
return INSTANCE;
}
@Override
public EventPublisher apply(final Class eventType, final Integer maxQueueSize) {
Class cachedEventType = TraceEvent.class;
for (Class publisherEvent : publisherEvents) {
if (publisherEvent.isAssignableFrom(eventType)) {
cachedEventType = publisherEvent;
break;
}
}
return publisher.computeIfAbsent(cachedEventType, eventClass -> {
TraceEventPublisher result = new TraceEventPublisher();
result.init(eventClass, maxQueueSize);
return result;
});
}
public String getAllPublisherStatues() {
StringBuilder result = new StringBuilder("Trace event publisher statues:\n");
for (TraceEventPublisher each : publisher.values()) {
result.append('\t').append(each.getStatus()).append('\n');
}
return result.toString();
}
public void addPublisherEvent(Class event) {
this.publisherEvents.add(event);
}
}