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/*
* ============LICENSE_START=======================================================
* policy-endpoints
* ================================================================================
* Copyright (C) 2017-2021 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2018-2019 Samsung Electronics Co., Ltd.
* Modifications Copyright (C) 2020 Bell Canada. All rights reserved.
* Modifications Copyright (C) 2023-2024 Nordix Foundation.
* ================================================================================
* 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.internal;
import java.util.UUID;
import lombok.Getter;
import lombok.Setter;
import org.onap.policy.common.endpoints.event.comm.bus.BusTopicSink;
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;
/**
* Transport Agnostic Bus Topic Sink to carry out the core functionality to interact with a sink
* regardless if it is UEB or Kafka.
*
*/
public abstract class InlineBusTopicSink extends BusTopicBase implements BusTopicSink {
/**
* Loggers.
*/
private static Logger logger = LoggerFactory.getLogger(InlineBusTopicSink.class);
/**
* The partition key to publish to.
*/
@Getter
@Setter
protected String partitionKey;
/**
* Message bus publisher.
*/
protected BusPublisher publisher;
/**
* Constructor for abstract sink.
* @param busTopicParams contains below listed attributes
* servers servers
* topic topic
* apiKey api secret
* apiSecret api secret
* partitionId partition id
* useHttps does connection use HTTPS?
* allowTracing is tracing allowed?
* allowSelfSignedCerts are self-signed certificates allow *
* @throws IllegalArgumentException if invalid parameters are passed in
*/
protected InlineBusTopicSink(BusTopicParams busTopicParams) {
super(busTopicParams);
if (busTopicParams.isPartitionIdInvalid()) {
this.partitionKey = UUID.randomUUID().toString();
} else {
this.partitionKey = busTopicParams.getPartitionId();
}
}
/**
* Initialize the Bus publisher.
*/
public abstract void init();
@Override
public boolean start() {
logger.info("{}: starting", this);
synchronized (this) {
if (!this.alive) {
if (locked) {
throw new IllegalStateException(this + " is locked.");
}
this.init();
this.alive = true;
}
}
return true;
}
@Override
public boolean stop() {
BusPublisher publisherCopy;
synchronized (this) {
this.alive = false;
publisherCopy = this.publisher;
this.publisher = null;
}
if (publisherCopy != null) {
try {
publisherCopy.close();
} catch (Exception e) {
logger.warn("{}: cannot stop publisher because of {}", this, e.getMessage(), e);
}
} else {
logger.warn("{}: there is no publisher", this);
return false;
}
return true;
}
@Override
public boolean send(String message) {
if (message == null || message.isEmpty()) {
throw new IllegalArgumentException("Message to send is empty");
}
if (!this.alive) {
throw new IllegalStateException(this + " is stopped");
}
try {
synchronized (this) {
this.recentEvents.add(message);
}
NetLoggerUtil.log(EventType.OUT, this.getTopicCommInfrastructure(), this.topic, message);
publisher.send(this.partitionKey, message);
broadcast(message);
} catch (Exception e) {
logger.warn("{}: cannot send because of {}", this, e.getMessage(), e);
return false;
}
return true;
}
@Override
public void shutdown() {
this.stop();
}
@Override
public String toString() {
return "InlineBusTopicSink [partitionId=" + partitionKey + ", alive=" + alive + ", publisher=" + publisher
+ "]";
}
}
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