Introduce Custom Kafka End point

Issue-ID: POLICY-4133
Signed-off-by: Sirisha_Manchikanti <sirisha.manchikanti@est.tech>
Change-Id: I2745f3af97e9bb83d94c5cb6d29dfd452d315506

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));
+    }
+}