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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2019-2020 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2019 Samsung Electronics Co., Ltd.
* Modifications Copyright (C) 2020 Bell Canada. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.endpoints.event.comm.bus;
import java.util.List;
import org.onap.policy.common.endpoints.event.comm.bus.internal.TopicBase;
import org.onap.policy.common.endpoints.utils.NetLoggerUtil;
import org.onap.policy.common.endpoints.utils.NetLoggerUtil.EventType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* No Operation topic endpoint.
*/
public abstract class NoopTopicEndpoint extends TopicBase {
/**
* Logger.
*/
private static Logger logger = LoggerFactory.getLogger(NoopTopicEndpoint.class);
/**
* Constructs the object.
*/
protected NoopTopicEndpoint(List<String> servers, String topic) {
super(servers, topic);
}
/**
* I/O.
*
* @param type "IN" or "OUT".
* @param message message.
* @return true if successful.
*/
protected boolean io(EventType type, String message) {
if (message == null || message.isEmpty()) {
throw new IllegalArgumentException("Message is empty");
}
if (!this.alive) {
throw new IllegalStateException(this + " is stopped");
}
try {
synchronized (this) {
this.recentEvents.add(message);
}
NetLoggerUtil.log(type, this.getTopicCommInfrastructure(), this.topic, message);
broadcast(message);
} catch (Exception e) {
logger.warn("{}: cannot send because of {}", this, e.getMessage(), e);
return false;
}
return true;
}
/**
* {@inheritDoc}.
*/
@Override
public CommInfrastructure getTopicCommInfrastructure() {
return CommInfrastructure.NOOP;
}
/**
* {@inheritDoc}.
*/
@Override
public boolean start() {
logger.info("{}: starting", this);
synchronized (this) {
if (!this.alive) {
if (locked) {
throw new IllegalStateException(this + " is locked.");
}
this.alive = true;
}
}
return true;
}
/**
* {@inheritDoc}.
*/
@Override
public boolean stop() {
logger.info("{}: stopping", this);
synchronized (this) {
this.alive = false;
}
return true;
}
/**
* {@inheritDoc}.
*/
@Override
public void shutdown() {
logger.info("{}: shutdown", this);
this.stop();
}
/**
* {@inheritDoc}.
*/
@Override
public String toString() {
return "NoopTopicEndpoint[" + super.toString() + "]";
}
}
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