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/*
* ============LICENSE_START=======================================================
* policy-endpoints
* ================================================================================
* Copyright (C) 2017-2018 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.impl;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Properties;
import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicSink;
import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicSinkFactory;
import org.onap.policy.common.endpoints.properties.PolicyEndPointProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Factory of noop sinks
*/
public class IndexedNoopTopicSinkFactory implements NoopTopicSinkFactory {
private static final String MISSING_TOPIC = "A topic must be provided";
private static final IndexedNoopTopicSinkFactory instance = new IndexedNoopTopicSinkFactory();
/**
* Logger
*/
private static Logger logger = LoggerFactory.getLogger(IndexedUebTopicSinkFactory.class);
/**
* noop topic sinks map
*/
protected HashMap<String, NoopTopicSink> noopTopicSinks = new HashMap<>();
/**
* Get the singleton instance.
*
* @return the instance
*/
public static IndexedNoopTopicSinkFactory getInstance() {
return instance;
}
private IndexedNoopTopicSinkFactory() {}
@Override
public List<NoopTopicSink> build(Properties properties) {
final String sinkTopics = properties.getProperty(PolicyEndPointProperties.PROPERTY_NOOP_SINK_TOPICS);
if (sinkTopics == null || sinkTopics.isEmpty()) {
logger.info("{}: no topic for noop sink", this);
return new ArrayList<>();
}
final List<String> sinkTopicList = new ArrayList<>(Arrays.asList(sinkTopics.split("\\s*,\\s*")));
final List<NoopTopicSink> newSinks = new ArrayList<>();
synchronized (this) {
for (final String topic : sinkTopicList) {
if (this.noopTopicSinks.containsKey(topic)) {
newSinks.add(this.noopTopicSinks.get(topic));
continue;
}
String servers = properties.getProperty(PolicyEndPointProperties.PROPERTY_NOOP_SINK_TOPICS + "." + topic
+ PolicyEndPointProperties.PROPERTY_TOPIC_SERVERS_SUFFIX);
if (servers == null || servers.isEmpty()) {
servers = "noop";
}
final List<String> serverList = new ArrayList<>(Arrays.asList(servers.split("\\s*,\\s*")));
final String managedString = properties.getProperty(PolicyEndPointProperties.PROPERTY_NOOP_SINK_TOPICS + "."
+ topic + PolicyEndPointProperties.PROPERTY_MANAGED_SUFFIX);
boolean managed = true;
if (managedString != null && !managedString.isEmpty()) {
managed = Boolean.parseBoolean(managedString);
}
final NoopTopicSink noopSink = this.build(serverList, topic, managed);
newSinks.add(noopSink);
}
return newSinks;
}
}
@Override
public NoopTopicSink build(List<String> servers, String topic, boolean managed) {
List<String> noopSinkServers = servers;
if (noopSinkServers == null) {
noopSinkServers = new ArrayList<>();
}
if (noopSinkServers.isEmpty()) {
noopSinkServers.add("noop");
}
if (topic == null || topic.isEmpty()) {
throw new IllegalArgumentException(MISSING_TOPIC);
}
synchronized (this) {
if (this.noopTopicSinks.containsKey(topic)) {
return this.noopTopicSinks.get(topic);
}
final NoopTopicSink sink = new NoopTopicSink(noopSinkServers, topic);
if (managed) {
this.noopTopicSinks.put(topic, sink);
}
return sink;
}
}
@Override
public void destroy(String topic) {
if (topic == null || topic.isEmpty()) {
throw new IllegalArgumentException(MISSING_TOPIC);
}
NoopTopicSink noopSink;
synchronized (this) {
if (!this.noopTopicSinks.containsKey(topic)) {
return;
}
noopSink = this.noopTopicSinks.remove(topic);
}
noopSink.shutdown();
}
@Override
public void destroy() {
final List<NoopTopicSink> sinks = this.inventory();
for (final NoopTopicSink sink : sinks) {
sink.shutdown();
}
synchronized (this) {
this.noopTopicSinks.clear();
}
}
@Override
public NoopTopicSink get(String topic) {
if (topic == null || topic.isEmpty()) {
throw new IllegalArgumentException(MISSING_TOPIC);
}
synchronized (this) {
if (this.noopTopicSinks.containsKey(topic)) {
return this.noopTopicSinks.get(topic);
} else {
throw new IllegalStateException("DmaapTopicSink for " + topic + " not found");
}
}
}
@Override
public List<NoopTopicSink> inventory() {
return new ArrayList<>(this.noopTopicSinks.values());
}
}
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