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/*
* ============LICENSE_START====================================
* DCAEGEN2-SERVICES-SDK
* =========================================================
* Copyright (C) 2019-2021 Nokia. All rights reserved.
* Copyright (C) 2023 Deutsche Telekom AG. 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.dcaegen2.services.sdk.rest.services.dmaap.client.impl;
import io.vavr.Tuple;
import io.vavr.Tuple2;
import io.vavr.control.Option;
import org.apache.kafka.clients.admin.AdminClient;
import org.onap.dcaegen2.services.sdk.model.streams.AafCredentials;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.Properties;
import java.util.concurrent.ExecutionException;
/**
* @author <a href="mailto:piotr.jaszczyk@nokia.com">Piotr Jaszczyk</a>
* @since April 2019
*/
public final class Commons {
static String commonInURL = "/events/";
static String KAFKA_PROPS_PREFIX = "kafka.";
private static final Logger LOGGER = LoggerFactory.getLogger(Commons.class);
private static AdminClient kafkaAdminClient;
private static Map<String,Object> map = new HashMap<>();
static {
map.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
map.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
map.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
map.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
map.put("max.poll.interval.ms", 300000);
map.put("heartbeat.interval.ms", 60000);
map.put("session.timeout.ms", 240000);
map.put("max.poll.records", 1000);
}
private Commons() {
}
static String extractFailReason(HttpResponse httpResponse) {
return String.format("%d %s%n%s", httpResponse.statusCode(), httpResponse.statusReason(),
httpResponse.bodyAsString());
}
static Tuple2<String, String> basicAuthHeader(AafCredentials credentials) {
Objects.requireNonNull(credentials, "aafCredentials");
String basicAuthFormat = basicAuthFormat(credentials);
byte[] utf8 = bytesUTF8(basicAuthFormat);
String userCredentials = Base64.getEncoder().encodeToString(utf8);
return Tuple.of("Authorization", "Basic " + userCredentials);
}
private static String basicAuthFormat(AafCredentials credentials) {
String username = getOrEmpty(credentials.username());
String password = getOrEmpty(credentials.password());
return username.concat(":").concat(password);
}
private static String getOrEmpty(String text) {
return Option.of(text).getOrElse("");
}
private static byte[] bytesUTF8(String text) {
return Option.of(text)
.map(s -> s.getBytes(StandardCharsets.UTF_8))
.getOrElse(new byte[0]);
}
/**
* Extracts the topic name from the topicUrl.
*
* <p>Condition for extracting topic name : Substring after '/events/' in the topicUrl</p>
*
* @param topicUrl
* @return topic
*/
public static String getTopicFromTopicUrl(String topicUrl) {
if(topicUrl.endsWith("/")) {
return topicUrl.substring(topicUrl.indexOf(commonInURL)+commonInURL.length(), topicUrl.lastIndexOf("/"));
}
return topicUrl.substring(topicUrl.indexOf(commonInURL)+commonInURL.length());
}
public static Properties setKafkaPropertiesFromSystemEnv(Map<String, String> envs) {
Map<String, Object> propMap= getKafkaPropertiesMap(envs);
Properties props = new Properties();
propMap.forEach((k ,v) -> props.put(k, v));
map.forEach((k,v) -> {
if(!propMap.containsKey(k)) {
props.put(k, v);
}
});
return props;
}
static Map<String, Object> getKafkaPropertiesMap(Map<String, String> envs){
Map<String, Object> propMap = new HashMap<>();
envs.forEach((k ,v) -> {
if(k.startsWith(KAFKA_PROPS_PREFIX)){
String key = k.substring(KAFKA_PROPS_PREFIX.length());
propMap.put(key, v);
}
});
return propMap;
}
public static void closeKafkaAdminClient() {
if(kafkaAdminClient != null) {
LOGGER.info("Closing the Kafka AdminClient.");
kafkaAdminClient.close();
kafkaAdminClient=null;
}
}
public static boolean checkIfTopicIsPresentInKafka(String topic, Properties adminProps) {
if(kafkaAdminClient == null) {
kafkaAdminClient = AdminClient.create(adminProps);
}
try {
for (String name : kafkaAdminClient.listTopics().names().get()) {
if (name.equals(topic)) {
LOGGER.debug("TOPIC_NAME: {} is equal to : {}", name, topic);
return true;
}
}
} catch (InterruptedException | ExecutionException e) {
LOGGER.error("GetTopicFromKafka: Failed to retrieve topic list from kafka.", e);
return false;
}
return false;
}
}
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