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authorSirisha_Manchikanti <sirisha.manchikanti@est.tech>2022-07-01 07:15:00 +0100
committerSirisha_Manchikanti <sirisha.manchikanti@est.tech>2022-07-22 20:17:46 +0100
commit2a2b5d085876480c1b0d9470a57c6cab4f51008c (patch)
tree64bd2ded017ad43bd995686e2e7b8f1ffa412a40 /policy-endpoints/src/main
parent15ede09d6ef4b52db05fab534eed7192991b1f98 (diff)
Introduce Custom Kafka End point
Issue-ID: POLICY-4133 Signed-off-by: Sirisha_Manchikanti <sirisha.manchikanti@est.tech> Change-Id: I2745f3af97e9bb83d94c5cb6d29dfd452d315506
Diffstat (limited to 'policy-endpoints/src/main')
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/Topic.java5
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/TopicEndpoint.java38
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/TopicEndpointProxy.java73
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/IndexedKafkaTopicSinkFactory.java198
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/IndexedKafkaTopicSourceFactory.java191
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicFactories.java39
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSink.java26
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSinkFactory.java89
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSource.java26
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSourceFactory.java88
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusConsumer.java54
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusPublisher.java58
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/InlineKafkaTopicSink.java76
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/SingleThreadedKafkaTopicSource.java64
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/properties/PolicyEndPointProperties.java6
-rw-r--r--policy-endpoints/src/main/java/org/onap/policy/common/endpoints/utils/KafkaPropertyUtils.java58
16 files changed, 1087 insertions, 2 deletions
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/Topic.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/Topic.java
index 6532a198..69bee717 100644
--- a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/Topic.java
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/Topic.java
@@ -4,6 +4,7 @@
* ================================================================================
* Copyright (C) 2017-2020 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2019 Samsung Electronics Co., Ltd.
+ * Copyright (C) 2022 Nordix Foundation.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -44,6 +45,10 @@ public interface Topic extends TopicRegisterable, Startable, Lockable {
*/
DMAAP,
/**
+ * KAFKA Communication Infrastructure.
+ */
+ KAFKA,
+ /**
* NOOP for internal use only.
*/
NOOP,
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/TopicEndpoint.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/TopicEndpoint.java
index bb707523..9bf3731a 100644
--- a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/TopicEndpoint.java
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/TopicEndpoint.java
@@ -3,6 +3,7 @@
* ONAP
* ================================================================================
* Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2022 Nordix Foundation.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -26,6 +27,8 @@ import org.onap.policy.common.capabilities.Lockable;
import org.onap.policy.common.capabilities.Startable;
import org.onap.policy.common.endpoints.event.comm.bus.DmaapTopicSink;
import org.onap.policy.common.endpoints.event.comm.bus.DmaapTopicSource;
+import org.onap.policy.common.endpoints.event.comm.bus.KafkaTopicSink;
+import org.onap.policy.common.endpoints.event.comm.bus.KafkaTopicSource;
import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicSink;
import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicSource;
import org.onap.policy.common.endpoints.event.comm.bus.UebTopicSink;
@@ -160,6 +163,14 @@ public interface TopicEndpoint extends Startable, Lockable {
NoopTopicSource getNoopTopicSource(String topicName);
/**
+ * Get the Kafka Source for the given topic name.
+ *
+ * @param topicName the topic name.
+ * @return the Kafka Source.
+ */
+ KafkaTopicSource getKafkaTopicSource(String topicName);
+
+ /**
* Get the Topic Sinks for the given topic name.
*
* @param topicNames the topic names
@@ -237,6 +248,18 @@ public interface TopicEndpoint extends Startable, Lockable {
DmaapTopicSink getDmaapTopicSink(String topicName);
/**
+ * Get the KAFKA Topic Source for the given topic name.
+ *
+ * @param topicName the topic name
+ *
+ * @return the Topic Source
+ * @throws IllegalStateException if the entity is in an invalid state, for example multiple
+ * TopicReaders for a topic name and communication infrastructure
+ * @throws IllegalArgumentException if invalid parameters are present
+ */
+ KafkaTopicSink getKafkaTopicSink(String topicName);
+
+ /**
* Gets only the UEB Topic Sources.
*
* @return the UEB Topic Source List
@@ -251,6 +274,13 @@ public interface TopicEndpoint extends Startable, Lockable {
List<DmaapTopicSource> getDmaapTopicSources();
/**
+ * Gets only the KAFKA Topic Sources.
+ *
+ * @return the KAFKA Topic Source List
+ */
+ List<KafkaTopicSource> getKafkaTopicSources();
+
+ /**
* Gets only the NOOP Topic Sources.
*
* @return the NOOP Topic Source List
@@ -272,9 +302,17 @@ public interface TopicEndpoint extends Startable, Lockable {
List<DmaapTopicSink> getDmaapTopicSinks();
/**
+ * Gets only the KAFKA Topic Sinks.
+ *
+ * @return the KAFKA Topic Sinks List
+ */
+ List<KafkaTopicSink> getKafkaTopicSinks();
+
+ /**
* Gets only the NOOP Topic Sinks.
*
* @return the NOOP Topic Sinks List
*/
List<NoopTopicSink> getNoopTopicSinks();
+
}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/TopicEndpointProxy.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/TopicEndpointProxy.java
index 293bf608..d37410e9 100644
--- a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/TopicEndpointProxy.java
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/TopicEndpointProxy.java
@@ -3,6 +3,7 @@
* ONAP
* ================================================================================
* Copyright (C) 2017-2021 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2022 Nordix Foundation.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -29,6 +30,9 @@ import org.onap.policy.common.capabilities.Startable;
import org.onap.policy.common.endpoints.event.comm.bus.DmaapTopicFactories;
import org.onap.policy.common.endpoints.event.comm.bus.DmaapTopicSink;
import org.onap.policy.common.endpoints.event.comm.bus.DmaapTopicSource;
+import org.onap.policy.common.endpoints.event.comm.bus.KafkaTopicFactories;
+import org.onap.policy.common.endpoints.event.comm.bus.KafkaTopicSink;
+import org.onap.policy.common.endpoints.event.comm.bus.KafkaTopicSource;
import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicFactories;
import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicSink;
import org.onap.policy.common.endpoints.event.comm.bus.NoopTopicSource;
@@ -95,6 +99,9 @@ class TopicEndpointProxy implements TopicEndpoint {
case DMAAP:
sources.add(DmaapTopicFactories.getSourceFactory().build(param));
break;
+ case KAFKA:
+ sources.add(KafkaTopicFactories.getSourceFactory().build(param));
+ break;
case NOOP:
sources.add(NoopTopicFactories.getSourceFactory().build(param));
break;
@@ -115,12 +122,14 @@ class TopicEndpointProxy implements TopicEndpoint {
// 1. Create UEB Sources
// 2. Create DMAAP Sources
- // 3. Create NOOP Sources
+ // 3. Create KAFKA Sources
+ // 4. Create NOOP Sources
List<TopicSource> sources = new ArrayList<>();
sources.addAll(UebTopicFactories.getSourceFactory().build(properties));
sources.addAll(DmaapTopicFactories.getSourceFactory().build(properties));
+ sources.addAll(KafkaTopicFactories.getSourceFactory().build(properties));
sources.addAll(NoopTopicFactories.getSourceFactory().build(properties));
lockSources(sources);
@@ -146,6 +155,9 @@ class TopicEndpointProxy implements TopicEndpoint {
case DMAAP:
sinks.add(DmaapTopicFactories.getSinkFactory().build(param));
break;
+ case KAFKA:
+ sinks.add(KafkaTopicFactories.getSinkFactory().build(param));
+ break;
case NOOP:
sinks.add(NoopTopicFactories.getSinkFactory().build(param));
break;
@@ -165,12 +177,14 @@ class TopicEndpointProxy implements TopicEndpoint {
public List<TopicSink> addTopicSinks(Properties properties) {
// 1. Create UEB Sinks
// 2. Create DMAAP Sinks
- // 3. Create NOOP Sinks
+ // 3. Create KAFKA Sinks
+ // 4. Create NOOP Sinks
final List<TopicSink> sinks = new ArrayList<>();
sinks.addAll(UebTopicFactories.getSinkFactory().build(properties));
sinks.addAll(DmaapTopicFactories.getSinkFactory().build(properties));
+ sinks.addAll(KafkaTopicFactories.getSinkFactory().build(properties));
sinks.addAll(NoopTopicFactories.getSinkFactory().build(properties));
lockSinks(sinks);
@@ -191,6 +205,7 @@ class TopicEndpointProxy implements TopicEndpoint {
sources.addAll(UebTopicFactories.getSourceFactory().inventory());
sources.addAll(DmaapTopicFactories.getSourceFactory().inventory());
+ sources.addAll(KafkaTopicFactories.getSourceFactory().inventory());
sources.addAll(NoopTopicFactories.getSourceFactory().inventory());
return sources;
@@ -224,6 +239,15 @@ class TopicEndpointProxy implements TopicEndpoint {
}
try {
+ final TopicSource kafkaSource = this.getKafkaTopicSource(topic);
+ if (kafkaSource != null) {
+ sources.add(kafkaSource);
+ }
+ } catch (final Exception e) {
+ logger.debug("No KAFKA source for topic: {}", topic, e);
+ }
+
+ try {
final TopicSource noopSource = this.getNoopTopicSource(topic);
if (noopSource != null) {
sources.add(noopSource);
@@ -242,6 +266,7 @@ class TopicEndpointProxy implements TopicEndpoint {
sinks.addAll(UebTopicFactories.getSinkFactory().inventory());
sinks.addAll(DmaapTopicFactories.getSinkFactory().inventory());
+ sinks.addAll(KafkaTopicFactories.getSinkFactory().inventory());
sinks.addAll(NoopTopicFactories.getSinkFactory().inventory());
return sinks;
@@ -275,6 +300,15 @@ class TopicEndpointProxy implements TopicEndpoint {
}
try {
+ final TopicSink kafkaSink = this.getKafkaTopicSink(topic);
+ if (kafkaSink != null) {
+ sinks.add(kafkaSink);
+ }
+ } catch (final Exception e) {
+ logger.debug("No KAFKA sink for topic: {}", topic, e);
+ }
+
+ try {
final TopicSink noopSink = this.getNoopTopicSink(topic);
if (noopSink != null) {
sinks.add(noopSink);
@@ -307,6 +341,12 @@ class TopicEndpointProxy implements TopicEndpoint {
}
try {
+ sinks.add(this.getKafkaTopicSink(topicName));
+ } catch (final Exception e) {
+ logNoSink(topicName, e);
+ }
+
+ try {
sinks.add(this.getNoopTopicSink(topicName));
} catch (final Exception e) {
logNoSink(topicName, e);
@@ -329,6 +369,12 @@ class TopicEndpointProxy implements TopicEndpoint {
@GsonJsonIgnore
@Override
+ public List<KafkaTopicSource> getKafkaTopicSources() {
+ return KafkaTopicFactories.getSourceFactory().inventory();
+ }
+
+ @GsonJsonIgnore
+ @Override
public List<NoopTopicSource> getNoopTopicSources() {
return NoopTopicFactories.getSourceFactory().inventory();
}
@@ -345,6 +391,12 @@ class TopicEndpointProxy implements TopicEndpoint {
return DmaapTopicFactories.getSinkFactory().inventory();
}
+ @Override
+ @GsonJsonIgnore
+ public List<KafkaTopicSink> getKafkaTopicSinks() {
+ return KafkaTopicFactories.getSinkFactory().inventory();
+ }
+
@GsonJsonIgnore
@Override
public List<NoopTopicSink> getNoopTopicSinks() {
@@ -432,6 +484,9 @@ class TopicEndpointProxy implements TopicEndpoint {
DmaapTopicFactories.getSourceFactory().destroy();
DmaapTopicFactories.getSinkFactory().destroy();
+ KafkaTopicFactories.getSourceFactory().destroy();
+ KafkaTopicFactories.getSinkFactory().destroy();
+
NoopTopicFactories.getSinkFactory().destroy();
NoopTopicFactories.getSourceFactory().destroy();
@@ -497,6 +552,8 @@ class TopicEndpointProxy implements TopicEndpoint {
return this.getUebTopicSource(topicName);
case DMAAP:
return this.getDmaapTopicSource(topicName);
+ case KAFKA:
+ return this.getKafkaTopicSource(topicName);
case NOOP:
return this.getNoopTopicSource(topicName);
default:
@@ -519,6 +576,8 @@ class TopicEndpointProxy implements TopicEndpoint {
return this.getUebTopicSink(topicName);
case DMAAP:
return this.getDmaapTopicSink(topicName);
+ case KAFKA:
+ return this.getKafkaTopicSink(topicName);
case NOOP:
return this.getNoopTopicSink(topicName);
default:
@@ -542,6 +601,11 @@ class TopicEndpointProxy implements TopicEndpoint {
}
@Override
+ public KafkaTopicSource getKafkaTopicSource(String topicName) {
+ return KafkaTopicFactories.getSourceFactory().get(topicName);
+ }
+
+ @Override
public NoopTopicSource getNoopTopicSource(String topicName) {
return NoopTopicFactories.getSourceFactory().get(topicName);
}
@@ -552,6 +616,11 @@ class TopicEndpointProxy implements TopicEndpoint {
}
@Override
+ public KafkaTopicSink getKafkaTopicSink(String topicName) {
+ return KafkaTopicFactories.getSinkFactory().get(topicName);
+ }
+
+ @Override
public NoopTopicSink getNoopTopicSink(String topicName) {
return NoopTopicFactories.getSinkFactory().get(topicName);
}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/IndexedKafkaTopicSinkFactory.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/IndexedKafkaTopicSinkFactory.java
new file mode 100644
index 00000000..23aaabd4
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/IndexedKafkaTopicSinkFactory.java
@@ -0,0 +1,198 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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;
+
+import com.google.re2j.Pattern;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Properties;
+import org.apache.commons.lang3.StringUtils;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.InlineKafkaTopicSink;
+import org.onap.policy.common.endpoints.properties.PolicyEndPointProperties;
+import org.onap.policy.common.endpoints.utils.KafkaPropertyUtils;
+import org.onap.policy.common.endpoints.utils.PropertyUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Factory of KAFKA Reader Topics indexed by topic name.
+ */
+class IndexedKafkaTopicSinkFactory implements KafkaTopicSinkFactory {
+ private static final Pattern COMMA_SPACE_PAT = Pattern.compile("\\s*,\\s*");
+ private static final String MISSING_TOPIC = "A topic must be provided";
+
+ /**
+ * Logger.
+ */
+ private static Logger logger = LoggerFactory.getLogger(IndexedKafkaTopicSinkFactory.class);
+
+ /**
+ * KAFKA Topic Name Index.
+ */
+ protected HashMap<String, KafkaTopicSink> kafkaTopicSinks = new HashMap<>();
+
+ @Override
+ public KafkaTopicSink build(BusTopicParams busTopicParams) {
+
+ if (busTopicParams.getServers() == null || busTopicParams.getServers().isEmpty()) {
+ throw new IllegalArgumentException("KAFKA Server(s) must be provided");
+ }
+
+ if (StringUtils.isBlank(busTopicParams.getTopic())) {
+ throw new IllegalArgumentException(MISSING_TOPIC);
+ }
+
+ synchronized (this) {
+ if (kafkaTopicSinks.containsKey(busTopicParams.getTopic())) {
+ return kafkaTopicSinks.get(busTopicParams.getTopic());
+ }
+
+ KafkaTopicSink kafkaTopicWriter = makeSink(busTopicParams);
+ if (busTopicParams.isManaged()) {
+ kafkaTopicSinks.put(busTopicParams.getTopic(), kafkaTopicWriter);
+ }
+
+ return kafkaTopicWriter;
+ }
+ }
+
+
+ @Override
+ public KafkaTopicSink build(List<String> servers, String topic) {
+ return this.build(BusTopicParams.builder()
+ .servers(servers)
+ .topic(topic)
+ .managed(true)
+ .useHttps(false)
+ .build());
+ }
+
+
+ @Override
+ public List<KafkaTopicSink> build(Properties properties) {
+
+ String writeTopics = properties.getProperty(PolicyEndPointProperties.PROPERTY_KAFKA_SINK_TOPICS);
+ if (StringUtils.isBlank(writeTopics)) {
+ logger.info("{}: no topic for KAFKA Sink", this);
+ return new ArrayList<>();
+ }
+
+ List<KafkaTopicSink> newKafkaTopicSinks = new ArrayList<>();
+ synchronized (this) {
+ for (String topic : COMMA_SPACE_PAT.split(writeTopics)) {
+ addTopic(newKafkaTopicSinks, topic, properties);
+ }
+ return newKafkaTopicSinks;
+ }
+ }
+
+ private void addTopic(List<KafkaTopicSink> newKafkaTopicSinks, String topic, Properties properties) {
+ if (this.kafkaTopicSinks.containsKey(topic)) {
+ newKafkaTopicSinks.add(this.kafkaTopicSinks.get(topic));
+ return;
+ }
+
+ String topicPrefix = PolicyEndPointProperties.PROPERTY_KAFKA_SINK_TOPICS + "." + topic;
+
+ var props = new PropertyUtils(properties, topicPrefix,
+ (name, value, ex) -> logger.warn("{}: {} {} is in invalid format for topic {} ", this, name, value, topic));
+
+ String servers = properties.getProperty(topicPrefix + PolicyEndPointProperties.PROPERTY_TOPIC_SERVERS_SUFFIX);
+ if (StringUtils.isBlank(servers)) {
+ logger.error("{}: no KAFKA servers configured for sink {}", this, topic);
+ return;
+ }
+
+ KafkaTopicSink kafkaTopicWriter = this.build(KafkaPropertyUtils.makeBuilder(props, topic, servers)
+ .partitionId(props.getString(PolicyEndPointProperties.PROPERTY_TOPIC_SINK_PARTITION_KEY_SUFFIX, null))
+ .build());
+ newKafkaTopicSinks.add(kafkaTopicWriter);
+ }
+
+ @Override
+ public void destroy(String topic) {
+
+ if (topic == null || topic.isEmpty()) {
+ throw new IllegalArgumentException(MISSING_TOPIC);
+ }
+
+ KafkaTopicSink kafkaTopicWriter;
+ synchronized (this) {
+ if (!kafkaTopicSinks.containsKey(topic)) {
+ return;
+ }
+
+ kafkaTopicWriter = kafkaTopicSinks.remove(topic);
+ }
+
+ kafkaTopicWriter.shutdown();
+ }
+
+ @Override
+ public void destroy() {
+ List<KafkaTopicSink> writers = this.inventory();
+ for (KafkaTopicSink writer : writers) {
+ writer.shutdown();
+ }
+
+ synchronized (this) {
+ this.kafkaTopicSinks.clear();
+ }
+ }
+
+ @Override
+ public KafkaTopicSink get(String topic) {
+
+ if (topic == null || topic.isEmpty()) {
+ throw new IllegalArgumentException(MISSING_TOPIC);
+ }
+
+ synchronized (this) {
+ if (kafkaTopicSinks.containsKey(topic)) {
+ return kafkaTopicSinks.get(topic);
+ } else {
+ throw new IllegalStateException("KafkaTopicSink for " + topic + " not found");
+ }
+ }
+ }
+
+ @Override
+ public synchronized List<KafkaTopicSink> inventory() {
+ return new ArrayList<>(this.kafkaTopicSinks.values());
+ }
+
+ /**
+ * Makes a new sink.
+ *
+ * @param busTopicParams parameters to use to configure the sink
+ * @return a new sink
+ */
+ protected KafkaTopicSink makeSink(BusTopicParams busTopicParams) {
+ return new InlineKafkaTopicSink(busTopicParams);
+ }
+
+
+ @Override
+ public String toString() {
+ return "IndexedKafkaTopicSinkFactory " + kafkaTopicSinks.keySet();
+ }
+
+}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/IndexedKafkaTopicSourceFactory.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/IndexedKafkaTopicSourceFactory.java
new file mode 100644
index 00000000..47279d47
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/IndexedKafkaTopicSourceFactory.java
@@ -0,0 +1,191 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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;
+
+import com.google.re2j.Pattern;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Properties;
+import org.apache.commons.lang3.StringUtils;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.SingleThreadedKafkaTopicSource;
+import org.onap.policy.common.endpoints.properties.PolicyEndPointProperties;
+import org.onap.policy.common.endpoints.utils.KafkaPropertyUtils;
+import org.onap.policy.common.endpoints.utils.PropertyUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Factory of KAFKA Source Topics indexed by topic name.
+ */
+class IndexedKafkaTopicSourceFactory implements KafkaTopicSourceFactory {
+ private static final Pattern COMMA_SPACE_PAT = Pattern.compile("\\s*,\\s*");
+ private static final String MISSING_TOPIC = "A topic must be provided";
+
+ /**
+ * Logger.
+ */
+ private static Logger logger = LoggerFactory.getLogger(IndexedKafkaTopicSourceFactory.class);
+
+ /**
+ * KAFKA Topic Name Index.
+ */
+ protected HashMap<String, KafkaTopicSource> kafkaTopicSources = new HashMap<>();
+
+ @Override
+ public KafkaTopicSource build(BusTopicParams busTopicParams) {
+ if (busTopicParams.getServers() == null || busTopicParams.getServers().isEmpty()) {
+ throw new IllegalArgumentException("KAFKA Server(s) must be provided");
+ }
+
+ if (busTopicParams.getTopic() == null || busTopicParams.getTopic().isEmpty()) {
+ throw new IllegalArgumentException(MISSING_TOPIC);
+ }
+
+ synchronized (this) {
+ if (kafkaTopicSources.containsKey(busTopicParams.getTopic())) {
+ return kafkaTopicSources.get(busTopicParams.getTopic());
+ }
+
+ var kafkaTopicSource = makeSource(busTopicParams);
+ kafkaTopicSources.put(busTopicParams.getTopic(), kafkaTopicSource);
+
+ return kafkaTopicSource;
+ }
+ }
+
+ @Override
+ public List<KafkaTopicSource> build(Properties properties) {
+
+ String readTopics = properties.getProperty(PolicyEndPointProperties.PROPERTY_KAFKA_SOURCE_TOPICS);
+ if (StringUtils.isBlank(readTopics)) {
+ logger.info("{}: no topic for KAFKA Source", this);
+ return new ArrayList<>();
+ }
+
+ List<KafkaTopicSource> newKafkaTopicSources = new ArrayList<>();
+ synchronized (this) {
+ for (String topic : COMMA_SPACE_PAT.split(readTopics)) {
+ addTopic(newKafkaTopicSources, topic, properties);
+ }
+ }
+ return newKafkaTopicSources;
+ }
+
+ @Override
+ public KafkaTopicSource build(List<String> servers, String topic) {
+ return this.build(BusTopicParams.builder()
+ .servers(servers)
+ .topic(topic)
+ .managed(true)
+ .useHttps(false).build());
+ }
+
+ private void addTopic(List<KafkaTopicSource> newKafkaTopicSources, String topic, Properties properties) {
+ if (this.kafkaTopicSources.containsKey(topic)) {
+ newKafkaTopicSources.add(this.kafkaTopicSources.get(topic));
+ return;
+ }
+
+ String topicPrefix = PolicyEndPointProperties.PROPERTY_KAFKA_SOURCE_TOPICS + "." + topic;
+
+ var props = new PropertyUtils(properties, topicPrefix,
+ (name, value, ex) -> logger.warn("{}: {} {} is in invalid format for topic {} ", this, name, value, topic));
+
+ String servers = properties.getProperty(topicPrefix + PolicyEndPointProperties.PROPERTY_TOPIC_SERVERS_SUFFIX);
+ if (StringUtils.isBlank(servers)) {
+ logger.error("{}: no KAFKA servers configured for sink {}", this, topic);
+ return;
+ }
+
+ var kafkaTopicSource = this.build(KafkaPropertyUtils.makeBuilder(props, topic, servers)
+ .build());
+
+ newKafkaTopicSources.add(kafkaTopicSource);
+ }
+
+ /**
+ * Makes a new source.
+ *
+ * @param busTopicParams parameters to use to configure the source
+ * @return a new source
+ */
+ protected KafkaTopicSource makeSource(BusTopicParams busTopicParams) {
+ return new SingleThreadedKafkaTopicSource(busTopicParams);
+ }
+
+ @Override
+ public void destroy(String topic) {
+
+ if (topic == null || topic.isEmpty()) {
+ throw new IllegalArgumentException(MISSING_TOPIC);
+ }
+
+ KafkaTopicSource kafkaTopicSource;
+
+ synchronized (this) {
+ if (!kafkaTopicSources.containsKey(topic)) {
+ return;
+ }
+
+ kafkaTopicSource = kafkaTopicSources.remove(topic);
+ }
+
+ kafkaTopicSource.shutdown();
+ }
+
+ @Override
+ public void destroy() {
+ List<KafkaTopicSource> readers = this.inventory();
+ for (KafkaTopicSource reader : readers) {
+ reader.shutdown();
+ }
+
+ synchronized (this) {
+ this.kafkaTopicSources.clear();
+ }
+ }
+
+ @Override
+ public KafkaTopicSource get(String topic) {
+
+ if (topic == null || topic.isEmpty()) {
+ throw new IllegalArgumentException(MISSING_TOPIC);
+ }
+
+ synchronized (this) {
+ if (kafkaTopicSources.containsKey(topic)) {
+ return kafkaTopicSources.get(topic);
+ } else {
+ throw new IllegalStateException("KafkaTopiceSource for " + topic + " not found");
+ }
+ }
+ }
+
+ @Override
+ public synchronized List<KafkaTopicSource> inventory() {
+ return new ArrayList<>(this.kafkaTopicSources.values());
+ }
+
+ @Override
+ public String toString() {
+ return "IndexedKafkaTopicSourceFactory " + kafkaTopicSources.keySet();
+ }
+}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicFactories.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicFactories.java
new file mode 100644
index 00000000..60db3857
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicFactories.java
@@ -0,0 +1,39 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class KafkaTopicFactories {
+
+ /**
+ * Factory for instantiation and management of sinks.
+ */
+ @Getter
+ private static final KafkaTopicSinkFactory sinkFactory = new IndexedKafkaTopicSinkFactory();
+
+ /**
+ * Factory for instantiation and management of sources.
+ */
+ @Getter
+ private static final KafkaTopicSourceFactory sourceFactory = new IndexedKafkaTopicSourceFactory();
+}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSink.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSink.java
new file mode 100644
index 00000000..960a02c5
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSink.java
@@ -0,0 +1,26 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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;
+
+/**
+ * Topic Writer over KAFKA Infrastructure.
+ */
+public interface KafkaTopicSink extends BusTopicSink {
+
+}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSinkFactory.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSinkFactory.java
new file mode 100644
index 00000000..fa5e56f9
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSinkFactory.java
@@ -0,0 +1,89 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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;
+
+import java.util.List;
+import java.util.Properties;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
+
+/**
+ * KAFKA Topic Sink Factory.
+ */
+public interface KafkaTopicSinkFactory {
+
+ /**
+ * Instantiates a new KAFKA Topic Writer.
+ *
+ * @param busTopicParams parameters object
+ * @return an KAFKA Topic Sink
+ */
+ KafkaTopicSink build(BusTopicParams busTopicParams);
+
+ /**
+ * Creates an KAFKA Topic Writer based on properties files.
+ *
+ * @param properties Properties containing initialization values
+ *
+ * @return an KAFKA Topic Writer
+ * @throws IllegalArgumentException if invalid parameters are present
+ */
+ List<KafkaTopicSink> build(Properties properties);
+
+ /**
+ * Instantiates a new KAFKA Topic Writer.
+ *
+ * @param servers list of servers
+ * @param topic topic name
+ *
+ * @return an KAFKA Topic Writer
+ * @throws IllegalArgumentException if invalid parameters are present
+ */
+ KafkaTopicSink build(List<String> servers, String topic);
+
+ /**
+ * Destroys an KAFKA Topic Writer based on a topic.
+ *
+ * @param topic topic name
+ * @throws IllegalArgumentException if invalid parameters are present
+ */
+ void destroy(String topic);
+
+ /**
+ * Destroys all KAFKA Topic Writers.
+ */
+ void destroy();
+
+ /**
+ * gets an KAFKA Topic Writer based on topic name.
+ *
+ * @param topic the topic name
+ *
+ * @return an KAFKA Topic Writer with topic name
+ * @throws IllegalArgumentException if an invalid topic is provided
+ * @throws IllegalStateException if the KAFKA Topic Reader is an incorrect state
+ */
+ KafkaTopicSink get(String topic);
+
+ /**
+ * Provides a snapshot of the KAFKA Topic Writers.
+ *
+ * @return a list of the KAFKA Topic Writers
+ */
+ List<KafkaTopicSink> inventory();
+}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSource.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSource.java
new file mode 100644
index 00000000..03efd083
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSource.java
@@ -0,0 +1,26 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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;
+
+/**
+ * Kafka Topic Source.
+ */
+public interface KafkaTopicSource extends BusTopicSource {
+
+} \ No newline at end of file
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSourceFactory.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSourceFactory.java
new file mode 100644
index 00000000..8cb51df8
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSourceFactory.java
@@ -0,0 +1,88 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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;
+
+import java.util.List;
+import java.util.Properties;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
+
+/**
+ * Kafka Topic Source Factory.
+ */
+public interface KafkaTopicSourceFactory {
+
+ /**
+ * Creates an Kafka Topic Source based on properties files.
+ *
+ * @param properties Properties containing initialization values
+ *
+ * @return an Kafka Topic Source
+ * @throws IllegalArgumentException if invalid parameters are present
+ */
+ List<KafkaTopicSource> build(Properties properties);
+
+ /**
+ * Instantiates a new Kafka Topic Source.
+ *
+ * @param busTopicParams parameters object
+ * @return an Kafka Topic Source
+ */
+ KafkaTopicSource build(BusTopicParams busTopicParams);
+
+ /**
+ * Instantiates a new Kafka Topic Source.
+ *
+ * @param servers list of servers
+ * @param topic topic name
+ *
+ * @return an Kafka Topic Source
+ * @throws IllegalArgumentException if invalid parameters are present
+ */
+ KafkaTopicSource build(List<String> servers, String topic);
+
+ /**
+ * Destroys an Kafka Topic Source based on a topic.
+ *
+ * @param topic topic name
+ * @throws IllegalArgumentException if invalid parameters are present
+ */
+ void destroy(String topic);
+
+ /**
+ * Destroys all Kafka Topic Sources.
+ */
+ void destroy();
+
+ /**
+ * Gets an Kafka Topic Source based on topic name.
+ *
+ * @param topic the topic name
+ * @return an Kafka Topic Source with topic name
+ * @throws IllegalArgumentException if an invalid topic is provided
+ * @throws IllegalStateException if the Kafka Topic Source is an incorrect state
+ */
+ KafkaTopicSource get(String topic);
+
+ /**
+ * Provides a snapshot of the Kafka Topic Sources.
+ *
+ * @return a list of the Kafka Topic Sources
+ */
+ List<KafkaTopicSource> inventory();
+}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusConsumer.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusConsumer.java
index 20f4c91c..8d88b0d9 100644
--- a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusConsumer.java
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusConsumer.java
@@ -5,6 +5,7 @@
* Copyright (C) 2017-2021 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2018 Samsung Electronics Co., Ltd.
* Modifications Copyright (C) 2020 Bell Canada. All rights reserved.
+ * Copyright (C) 2022 Nordix Foundation.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -28,13 +29,19 @@ import com.att.nsa.cambria.client.CambriaConsumer;
import java.io.IOException;
import java.net.MalformedURLException;
import java.security.GeneralSecurityException;
+import java.time.Duration;
import java.util.ArrayList;
+import java.util.Arrays;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import lombok.Getter;
import org.apache.commons.lang3.StringUtils;
+import org.apache.kafka.clients.consumer.ConsumerConfig;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.apache.kafka.clients.consumer.ConsumerRecords;
+import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.onap.dmaap.mr.client.MRClientFactory;
import org.onap.dmaap.mr.client.impl.MRConsumerImpl;
import org.onap.dmaap.mr.client.impl.MRConsumerImpl.MRConsumerImplBuilder;
@@ -219,6 +226,53 @@ public interface BusConsumer {
}
/**
+ * Kafka based consumer.
+ */
+ public static class KafkaConsumerWrapper extends FetchingBusConsumer {
+
+ /**
+ * logger.
+ */
+ private static Logger logger = LoggerFactory.getLogger(KafkaConsumerWrapper.class);
+
+ /**
+ * Kafka consumer.
+ */
+ private KafkaConsumer<String, String> consumer;
+
+ /**
+ * Kafka Consumer Wrapper.
+ * BusTopicParam object contains the following parameters
+ * servers messaging bus hosts.
+ * topic topic
+ *
+ * @param busTopicParams - The parameters for the bus topic
+ * @throws GeneralSecurityException - Security exception
+ * @throws MalformedURLException - Malformed URL exception
+ */
+ public KafkaConsumerWrapper(BusTopicParams busTopicParams) {
+ super(busTopicParams);
+ }
+
+ @Override
+ public Iterable<String> fetch() throws IOException {
+ // TODO: Not implemented yet
+ return new ArrayList<>();
+ }
+
+ @Override
+ public void close() {
+ super.close();
+ this.consumer.close();
+ }
+
+ @Override
+ public String toString() {
+ return "KafkaConsumerWrapper [fetchTimeout=" + fetchTimeout + "]";
+ }
+ }
+
+ /**
* MR based consumer.
*/
public abstract class DmaapConsumerWrapper extends FetchingBusConsumer {
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusPublisher.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusPublisher.java
index 8bf805bf..e0df7095 100644
--- a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusPublisher.java
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusPublisher.java
@@ -5,6 +5,7 @@
* Copyright (C) 2017-2021 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2018 Samsung Electronics Co., Ltd.
* Modifications Copyright (C) 2020 Bell Canada. All rights reserved.
+ * Copyright (C) 2022 Nordix Foundation.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -31,8 +32,13 @@ import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Properties;
+import java.util.Random;
import java.util.concurrent.TimeUnit;
import org.apache.commons.lang3.StringUtils;
+import org.apache.kafka.clients.producer.KafkaProducer;
+import org.apache.kafka.clients.producer.ProducerConfig;
+import org.apache.kafka.clients.producer.ProducerRecord;
+import org.apache.kafka.common.record.CompressionType;
import org.onap.dmaap.mr.client.impl.MRSimplerBatchPublisher;
import org.onap.dmaap.mr.client.response.MRPublisherResponse;
import org.onap.dmaap.mr.test.clients.ProtocolTypeConstants;
@@ -144,6 +150,58 @@ public interface BusPublisher {
}
/**
+ * Kafka based library publisher.
+ */
+ public static class KafkaPublisherWrapper implements BusPublisher {
+
+ private static Logger logger = LoggerFactory.getLogger(KafkaPublisherWrapper.class);
+
+ /**
+ * The actual Kafka publisher.
+ */
+ private final KafkaProducer producer;
+
+ /**
+ * Constructor.
+ *
+ * @param busTopicParams topic parameters
+ */
+ public KafkaPublisherWrapper(BusTopicParams busTopicParams) {
+ // TODO Setting of topic parameters is not implemented yet.
+ //Setup Properties for Kafka Producer
+ Properties kafkaProps = new Properties();
+ this.producer = new KafkaProducer(kafkaProps);
+ }
+
+ @Override
+ public boolean send(String partitionId, String message) {
+ if (message == null) {
+ throw new IllegalArgumentException("No message provided");
+ }
+ // TODO Sending messages is not implemented yet
+ return true;
+ }
+
+ @Override
+ public void close() {
+ logger.info("{}: CLOSE", this);
+
+ try (this.producer) {
+ this.producer.close();
+ } catch (Exception e) {
+ logger.warn("{}: CLOSE FAILED because of {}", this, e.getMessage(), e);
+ }
+ }
+
+
+ @Override
+ public String toString() {
+ return "KafkaPublisherWrapper []";
+ }
+
+ }
+
+ /**
* DmaapClient library wrapper.
*/
public abstract class DmaapPublisherWrapper implements BusPublisher {
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/InlineKafkaTopicSink.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/InlineKafkaTopicSink.java
new file mode 100644
index 00000000..b564229b
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/InlineKafkaTopicSink.java
@@ -0,0 +1,76 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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.internal;
+
+import org.onap.policy.common.endpoints.event.comm.Topic;
+import org.onap.policy.common.endpoints.event.comm.bus.KafkaTopicSink;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This implementation publishes events for the associated KAFKA topic, inline with the calling
+ * thread.
+ */
+public class InlineKafkaTopicSink extends InlineBusTopicSink implements KafkaTopicSink {
+
+ /**
+ * Logger.
+ */
+ private static Logger logger = LoggerFactory.getLogger(InlineKafkaTopicSink.class);
+
+ /**
+ * Argument-based KAFKA Topic Writer instantiation. BusTopicParams contains below mentioned
+ * attributes.
+ *
+ * <p>servers list of KAFKA servers available for publishing
+ * topic the topic to publish to
+ * partitionId the partition key (optional, autogenerated if not provided)
+ * useHttps does connection use HTTPS?
+ * @param busTopicParams contains attributes needed
+ * @throws IllegalArgumentException if invalid arguments are detected
+ */
+ public InlineKafkaTopicSink(BusTopicParams busTopicParams) {
+ super(busTopicParams);
+ }
+
+ /**
+ * Instantiation of internal resources.
+ */
+ @Override
+ public void init() {
+
+ this.publisher = new BusPublisher.KafkaPublisherWrapper(BusTopicParams.builder()
+ .servers(this.servers)
+ .topic(this.effectiveTopic)
+ .useHttps(this.useHttps)
+ .build());
+ logger.info("{}: KAFKA SINK created", this);
+ }
+
+ @Override
+ public String toString() {
+ return "InlineKafkaTopicSink [getTopicCommInfrastructure()=" + getTopicCommInfrastructure() + ", toString()="
+ + super.toString() + "]";
+ }
+
+ @Override
+ public CommInfrastructure getTopicCommInfrastructure() {
+ return Topic.CommInfrastructure.KAFKA;
+ }
+}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/SingleThreadedKafkaTopicSource.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/SingleThreadedKafkaTopicSource.java
new file mode 100644
index 00000000..b8362b83
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/event/comm/bus/internal/SingleThreadedKafkaTopicSource.java
@@ -0,0 +1,64 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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.internal;
+
+import org.onap.policy.common.endpoints.event.comm.Topic;
+import org.onap.policy.common.endpoints.event.comm.bus.KafkaTopicSource;
+
+/**
+ * This topic source implementation specializes in reading messages over an Kafka Bus topic source and
+ * notifying its listeners.
+ */
+public class SingleThreadedKafkaTopicSource extends SingleThreadedBusTopicSource implements KafkaTopicSource {
+
+ /**
+ * Constructor.
+ *
+ * @param busTopicParams Parameters object containing all the required inputs
+ * @throws IllegalArgumentException An invalid parameter passed in
+ */
+ public SingleThreadedKafkaTopicSource(BusTopicParams busTopicParams) {
+ super(busTopicParams);
+ this.init();
+ }
+
+ /**
+ * Initialize the Cambria client.
+ */
+ @Override
+ public void init() {
+ this.consumer = new BusConsumer.KafkaConsumerWrapper(BusTopicParams.builder()
+ .servers(this.servers)
+ .topic(this.effectiveTopic)
+ .useHttps(this.useHttps)
+ .build());
+ }
+
+ @Override
+ public CommInfrastructure getTopicCommInfrastructure() {
+ return Topic.CommInfrastructure.KAFKA;
+ }
+
+ @Override
+ public String toString() {
+ return "SingleThreadedKafkaTopicSource [getTopicCommInfrastructure()=" + getTopicCommInfrastructure()
+ + ", toString()=" + super.toString() + "]";
+ }
+
+}
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/properties/PolicyEndPointProperties.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/properties/PolicyEndPointProperties.java
index 08ed2624..49dff287 100644
--- a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/properties/PolicyEndPointProperties.java
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/properties/PolicyEndPointProperties.java
@@ -3,6 +3,7 @@
* ONAP
* ================================================================================
* Copyright (C) 2017-2021 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2022 Nordix Foundation.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -79,6 +80,11 @@ public final class PolicyEndPointProperties {
public static final String PROPERTY_NOOP_SOURCE_TOPICS = "noop.source.topics";
public static final String PROPERTY_NOOP_SINK_TOPICS = "noop.sink.topics";
+ /* KAFKA Properties */
+
+ public static final String PROPERTY_KAFKA_SOURCE_TOPICS = "kafka.source.topics";
+ public static final String PROPERTY_KAFKA_SINK_TOPICS = "kafka.sink.topics";
+
/* HTTP Server Properties */
public static final String PROPERTY_HTTP_SERVER_SERVICES = "http.server.services";
diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/utils/KafkaPropertyUtils.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/utils/KafkaPropertyUtils.java
new file mode 100644
index 00000000..3e62f98f
--- /dev/null
+++ b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/utils/KafkaPropertyUtils.java
@@ -0,0 +1,58 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2019, 2021 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2022 Nordix Foundation.
+ * ================================================================================
+ * 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.utils;
+
+import com.google.re2j.Pattern;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams.TopicParamsBuilder;
+import org.onap.policy.common.endpoints.properties.PolicyEndPointProperties;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class KafkaPropertyUtils {
+ private static final Pattern COMMA_SPACE_PAT = Pattern.compile("\\s*,\\s*");
+
+ /**
+ * Makes a topic builder, configuring it with properties that are common to both
+ * sources and sinks.
+ *
+ * @param props properties to be used to configure the builder
+ * @param topic topic being configured
+ * @param servers target servers
+ * @return a topic builder
+ */
+ public static TopicParamsBuilder makeBuilder(PropertyUtils props, String topic, String servers) {
+
+ final List<String> serverList = new ArrayList<>(Arrays.asList(COMMA_SPACE_PAT.split(servers)));
+ //TODO More Kafka properties to be added
+ return BusTopicParams.builder()
+ .servers(serverList)
+ .topic(topic)
+ .effectiveTopic(props.getString(PolicyEndPointProperties.PROPERTY_TOPIC_EFFECTIVE_TOPIC_SUFFIX,
+ topic))
+ .managed(props.getBoolean(PolicyEndPointProperties.PROPERTY_MANAGED_SUFFIX, true));
+ }
+}