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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.drools.event.comm.bus;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Properties;
import org.onap.policy.drools.event.comm.bus.internal.InlineUebTopicSink;
import org.slf4j.LoggerFactory;
import org.slf4j.Logger;
import org.onap.policy.drools.properties.PolicyProperties;
/**
* UEB Topic Sink Factory
*/
public interface UebTopicSinkFactory {
/**
* Instantiates a new UEB Topic Writer
*
* @param servers list of servers
* @param topic topic name
* @param apiKey API Key
* @param apiSecret API Secret
* @param partitionKey Consumer Group
* @param managed is this sink endpoint managed?
*
* @return an UEB Topic Sink
* @throws IllegalArgumentException if invalid parameters are present
*/
public UebTopicSink build(List<String> servers,
String topic,
String apiKey,
String apiSecret,
String partitionKey,
boolean managed,
boolean useHttps,
boolean allowSelfSignedCerts);
/**
* Creates an UEB Topic Writer based on properties files
*
* @param properties Properties containing initialization values
*
* @return an UEB Topic Writer
* @throws IllegalArgumentException if invalid parameters are present
*/
public List<UebTopicSink> build(Properties properties);
/**
* Instantiates a new UEB Topic Writer
*
* @param servers list of servers
* @param topic topic name
*
* @return an UEB Topic Writer
* @throws IllegalArgumentException if invalid parameters are present
*/
public UebTopicSink build(List<String> servers, String topic);
/**
* Destroys an UEB Topic Writer based on a topic
*
* @param topic topic name
* @throws IllegalArgumentException if invalid parameters are present
*/
public void destroy(String topic);
/**
* gets an UEB Topic Writer based on topic name
* @param topic the topic name
*
* @return an UEB Topic Writer with topic name
* @throws IllegalArgumentException if an invalid topic is provided
* @throws IllegalStateException if the UEB Topic Reader is
* an incorrect state
*/
public UebTopicSink get(String topic);
/**
* Provides a snapshot of the UEB Topic Writers
* @return a list of the UEB Topic Writers
*/
public List<UebTopicSink> inventory();
/**
* Destroys all UEB Topic Writers
*/
public void destroy();
}
/* ------------- implementation ----------------- */
/**
* Factory of UEB Reader Topics indexed by topic name
*/
class IndexedUebTopicSinkFactory implements UebTopicSinkFactory {
/**
* Logger
*/
private static Logger logger = LoggerFactory.getLogger(IndexedUebTopicSinkFactory.class);
/**
* UEB Topic Name Index
*/
protected HashMap<String, UebTopicSink> uebTopicSinks =
new HashMap<String, UebTopicSink>();
@Override
public UebTopicSink build(List<String> servers,
String topic,
String apiKey,
String apiSecret,
String partitionKey,
boolean managed,
boolean useHttps,
boolean allowSelfSignedCerts) {
if (servers == null || servers.isEmpty()) {
throw new IllegalArgumentException("UEB Server(s) must be provided");
}
if (topic == null || topic.isEmpty()) {
throw new IllegalArgumentException("A topic must be provided");
}
synchronized (this) {
if (uebTopicSinks.containsKey(topic)) {
return uebTopicSinks.get(topic);
}
UebTopicSink uebTopicWriter =
new InlineUebTopicSink(servers, topic,
apiKey, apiSecret,partitionKey, useHttps, allowSelfSignedCerts);
if (managed)
uebTopicSinks.put(topic, uebTopicWriter);
return uebTopicWriter;
}
}
@Override
public UebTopicSink build(List<String> servers, String topic) {
return this.build(servers, topic, null, null, null, true, false, false);
}
@Override
public List<UebTopicSink> build(Properties properties) {
String writeTopics = properties.getProperty(PolicyProperties.PROPERTY_UEB_SINK_TOPICS);
if (writeTopics == null || writeTopics.isEmpty()) {
logger.info("{}: no topic for UEB Sink", this);
return new ArrayList<>();
}
List<String> writeTopicList = new ArrayList<>(Arrays.asList(writeTopics.split("\\s*,\\s*")));
List<UebTopicSink> newUebTopicSinks = new ArrayList<>();
synchronized(this) {
for (String topic: writeTopicList) {
if (this.uebTopicSinks.containsKey(topic)) {
newUebTopicSinks.add(this.uebTopicSinks.get(topic));
continue;
}
String servers = properties.getProperty(PolicyProperties.PROPERTY_UEB_SINK_TOPICS + "." +
topic +
PolicyProperties.PROPERTY_TOPIC_SERVERS_SUFFIX);
if (servers == null || servers.isEmpty()) {
logger.error("{}: no UEB servers configured for sink {}", this, topic);
continue;
}
List<String> serverList = new ArrayList<>(Arrays.asList(servers.split("\\s*,\\s*")));
String apiKey = properties.getProperty(PolicyProperties.PROPERTY_UEB_SINK_TOPICS +
"." + topic +
PolicyProperties.PROPERTY_TOPIC_API_KEY_SUFFIX);
String apiSecret = properties.getProperty(PolicyProperties.PROPERTY_UEB_SINK_TOPICS +
"." + topic +
PolicyProperties.PROPERTY_TOPIC_API_SECRET_SUFFIX);
String partitionKey = properties.getProperty(PolicyProperties.PROPERTY_UEB_SINK_TOPICS +
"." + topic +
PolicyProperties.PROPERTY_TOPIC_SINK_PARTITION_KEY_SUFFIX);
String managedString = properties.getProperty(PolicyProperties.PROPERTY_UEB_SINK_TOPICS + "." + topic +
PolicyProperties.PROPERTY_MANAGED_SUFFIX);
boolean managed = true;
if (managedString != null && !managedString.isEmpty()) {
managed = Boolean.parseBoolean(managedString);
}
String useHttpsString = properties.getProperty(PolicyProperties.PROPERTY_UEB_SOURCE_TOPICS + "." + topic +
PolicyProperties.PROPERTY_HTTP_HTTPS_SUFFIX);
//default is to use HTTP if no https property exists
boolean useHttps = false;
if (useHttpsString != null && !useHttpsString.isEmpty()){
useHttps = Boolean.parseBoolean(useHttpsString);
}
String allowSelfSignedCertsString = properties.getProperty(PolicyProperties.PROPERTY_UEB_SOURCE_TOPICS + "." + topic +
PolicyProperties.PROPERTY_ALLOW_SELF_SIGNED_CERTIFICATES_SUFFIX);
//default is to disallow self-signed certs
boolean allowSelfSignedCerts = false;
if (allowSelfSignedCertsString != null && !allowSelfSignedCertsString.isEmpty()){
allowSelfSignedCerts = Boolean.parseBoolean(allowSelfSignedCertsString);
}
UebTopicSink uebTopicWriter = this.build(serverList, topic,
apiKey, apiSecret,
partitionKey, managed, useHttps, allowSelfSignedCerts);
newUebTopicSinks.add(uebTopicWriter);
}
return newUebTopicSinks;
}
}
@Override
public void destroy(String topic) {
if (topic == null || topic.isEmpty()) {
throw new IllegalArgumentException("A topic must be provided");
}
UebTopicSink uebTopicWriter;
synchronized(this) {
if (!uebTopicSinks.containsKey(topic)) {
return;
}
uebTopicWriter = uebTopicSinks.remove(topic);
}
uebTopicWriter.shutdown();
}
@Override
public void destroy() {
List<UebTopicSink> writers = this.inventory();
for (UebTopicSink writer: writers) {
writer.shutdown();
}
synchronized(this) {
this.uebTopicSinks.clear();
}
}
@Override
public UebTopicSink get(String topic) {
if (topic == null || topic.isEmpty()) {
throw new IllegalArgumentException("A topic must be provided");
}
synchronized(this) {
if (uebTopicSinks.containsKey(topic)) {
return uebTopicSinks.get(topic);
} else {
throw new IllegalStateException("UebTopicSink for " + topic + " not found");
}
}
}
@Override
public synchronized List<UebTopicSink> inventory() {
List<UebTopicSink> writers =
new ArrayList<>(this.uebTopicSinks.values());
return writers;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("IndexedUebTopicSinkFactory []");
return builder.toString();
}
}
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