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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2019 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.openecomp.sdc.dmaap;
import com.att.nsa.mr.client.MRBatchingPublisher;
import com.att.nsa.mr.client.MRClientFactory;
import com.att.nsa.mr.client.MRPublisher.message;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.yaml.snakeyaml.Yaml;
import java.util.concurrent.TimeUnit;
public class DmaapPublishTool {
private static final Logger logger = LoggerFactory.getLogger(DmaapPublishTool.class);
final private TopicConfig topicConfig;
public DmaapPublishTool(String yamlPath) throws FileNotFoundException {
topicConfig = loadTopicConfig(yamlPath);
System.out.println("yaml file loaded.");
}
public DmaapPublishTool(String yamlPath , String notifications) throws FileNotFoundException {
topicConfig = loadTopicConfig(yamlPath);
if (StringUtils.isNotBlank(notifications) )
topicConfig.add( notifications );
System.out.println("yaml file loaded.");
}
public void addNotifications(Collection<String> notification){
topicConfig.addAll( notification );
}
//safe stream doesn't throw null pointer exception
public <T> Collection<T> safe(Collection<T> obj){
return Optional.ofNullable(obj).orElse(Collections.emptySet());
}
public <T> List<T> safe(List<T> obj){
return Optional.ofNullable(obj).orElse(Collections.emptyList());
}
public void publish(String path) throws IOException, InterruptedException {
MRBatchingPublisher pub = createPublisher( topicConfig, path );
System.out.println( "pending message count -> "+pub.getPendingMessageCount() );
List<String> list = this.topicConfig.getIncomingTopicMessages();
for(String msg : safe(list) ){
publishOne( pub , msg );
}
closePublisher(pub);
}
private MRBatchingPublisher createPublisher(TopicConfig topicConfig,String path) throws IOException {
MRBatchingPublisher publisher = MRClientFactory.createBatchingPublisher(Objects.requireNonNull(Util.toPath(path,topicConfig.getPublisherPropertiesFilePath())));
System.out.println("publisher created.");
return publisher;
}
private TopicConfig loadTopicConfig(String yamlPath) throws FileNotFoundException {
File yamlFile = new File(Objects.requireNonNull(yamlPath));
InputStream input = new FileInputStream(yamlFile);
Yaml yamlHelper = new Yaml();
return yamlHelper.loadAs(input, TopicConfig.class);
}
private void publishOne(MRBatchingPublisher pub, String msg) throws IOException, InterruptedException {
System.out.println("sending: " + msg);
pub.send(msg);
System.out.println("message sent.");
}
private void closePublisher(MRBatchingPublisher pub) throws IOException, InterruptedException {
System.out.println("closing publisher...");
// close the publisher to make sure everything's sent before exiting. The batching
// publisher interface allows the app to get the set of unsent messages. It could
// write them to disk, for example, to try to send them later.
final List<message> stuck = pub.close(20, TimeUnit.SECONDS);
if(!stuck.isEmpty())
{
final String errMsg = stuck.size() + " messages unsent";
logger.error(errMsg);
System.err.println(errMsg);
}
else
{
final String successMsg = "Clean exit; all messages sent.";
logger.info(successMsg);
System.out.println(successMsg);
}
}
}
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