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/*-
* ============LICENSE_START=======================================================
* org.onap.dcaegen2.collectors.ves
* ================================================================================
* Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* Copyright (C) 2018 Nokia. 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.dcae.commonFunction;
import com.att.nsa.cambria.client.CambriaBatchingPublisher;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.cache.RemovalListener;
import com.google.common.cache.RemovalNotification;
import java.io.IOException;
import java.net.MalformedURLException;
import java.security.GeneralSecurityException;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class DmaapPublishers {
private static Logger log = LoggerFactory.getLogger(DmaapPublishers.class);
private final LoadingCache<String, CambriaBatchingPublisher> publishers;
private DmaapPublishers(
LoadingCache<String, CambriaBatchingPublisher> publishers) {
this.publishers = publishers;
}
static DmaapPublishers create() {
return create(new CambriaPublisherFactory());
}
static DmaapPublishers create(final CambriaPublisherFactory publisherFactory) {
final LoadingCache<String, CambriaBatchingPublisher> cache = CacheBuilder.<String, CambriaBatchingPublisher>newBuilder()
// .expireAfterAccess(10, TimeUnit.MINUTES)
.removalListener(new RemovalListener<String, CambriaBatchingPublisher>() {
@Override
public void onRemoval(RemovalNotification<String, CambriaBatchingPublisher> notification) {
if (notification.getValue() != null) {
onCacheItemInvalidated(notification.getValue());
}
}
})
.build(new CacheLoader<String, CambriaBatchingPublisher>() {
@Override
public CambriaBatchingPublisher load(String streamId)
throws MalformedURLException, GeneralSecurityException {
try {
return publisherFactory.createCambriaPublisher(streamId);
} catch (MalformedURLException | GeneralSecurityException e) {
log.error("CambriaClientBuilders connection reader exception : streamID - " + streamId + " "
+ e.getMessage());
throw e;
}
}
});
return new DmaapPublishers(cache);
}
public CambriaBatchingPublisher getByStreamId(String streamId) {
return publishers.getUnchecked(streamId);
}
public void closeByStreamId(String streamId) {
publishers.invalidate(streamId);
}
private static void onCacheItemInvalidated(CambriaBatchingPublisher pub) {
try {
final List<?> stuck = pub.close(20, TimeUnit.SECONDS);
if (!stuck.isEmpty()) {
log.error(stuck.size() + " messages unsent");
}
} catch (InterruptedException | IOException e) {
log.error("Caught Exception on Close event: {}", e);
}
}
}
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