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/*-
* ============LICENSE_START=======================================================
* policy-endpoints
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. 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.TopicSink;
import org.onap.policy.common.endpoints.event.comm.bus.internal.TopicBase;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* NOOP topic sink
*/
public class NoopTopicSink extends TopicBase implements TopicSink {
/**
* factory
*/
public static final NoopTopicSinkFactory factory = new IndexedNoopTopicSinkFactory();
/**
* logger
*/
private static Logger logger = LoggerFactory.getLogger(NoopTopicSink.class);
/**
* net logger
*/
private static final Logger netLogger = LoggerFactory.getLogger(NETWORK_LOGGER);
/**
* constructor
*
* @param servers servers
* @param topic topic
* @throws IllegalArgumentException if an invalid argument has been passed in
*/
public NoopTopicSink(List<String> servers, String topic) {
super(servers, topic);
}
@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);
}
netLogger.info("[OUT|{}|{}]{}{}", this.getTopicCommInfrastructure(), this.topic, System.lineSeparator(),
message);
broadcast(message);
} catch (Exception e) {
logger.warn("{}: cannot send because of {}", this, e.getMessage(), e);
return false;
}
return true;
}
@Override
public CommInfrastructure getTopicCommInfrastructure() {
return CommInfrastructure.NOOP;
}
@Override
public boolean start() {
logger.info("{}: starting", this);
synchronized (this) {
if (this.alive) {
return true;
}
if (locked) {
throw new IllegalStateException(this + " is locked.");
}
this.alive = true;
}
return true;
}
@Override
public boolean stop() {
synchronized (this) {
this.alive = false;
}
return true;
}
@Override
public void shutdown() {
this.stop();
}
@Override
public String toString() {
return "NoopTopicSink [toString()=" + super.toString() + "]";
}
}
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