Introduce Custom Kafka End point

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

7 files changed, 424 insertions, 0 deletions

diff --git a/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicFactoryTestBase.java b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicFactoryTestBase.java
new file mode 100644
index 00000000..3986549c
--- /dev/null
+++ b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicFactoryTestBase.java
@@ -0,0 +1,48 @@
+/*
+ * ============LICENSE_START=======================================================
+ * policy-endpoints
+ * ================================================================================
+ * Copyright (C) 2018-2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.endpoints.event.comm.bus;
+
+import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
+
+import java.util.Collections;
+import org.onap.policy.common.endpoints.event.comm.Topic;
+
+/**
+ * Base class for KafkaTopicXxxFactory tests.
+ *
+ * @param <T> type of topic managed by the factory
+ */
+public abstract class KafkaTopicFactoryTestBase<T extends Topic> extends BusTopicFactoryTestBase<T> {
+
+    @Override
+    public void testBuildBusTopicParams_Ex() {
+
+        super.testBuildBusTopicParams_Ex();
+
+        // null servers
+        assertThatIllegalArgumentException().as("null servers")
+                        .isThrownBy(() -> buildTopic(makeBuilder().servers(null).build()));
+
+        // empty servers
+        assertThatIllegalArgumentException().as("empty servers")
+                        .isThrownBy(() -> buildTopic(makeBuilder().servers(Collections.emptyList()).build()));
+    }
+}
diff --git a/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicPropertyBuilder.java b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicPropertyBuilder.java
new file mode 100644
index 00000000..1a815e1a
--- /dev/null
+++ b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicPropertyBuilder.java
@@ -0,0 +1,75 @@
+/*
+ * ============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 static org.onap.policy.common.endpoints.event.comm.bus.TopicTestBase.MY_EFFECTIVE_TOPIC;
+import static org.onap.policy.common.endpoints.event.comm.bus.TopicTestBase.MY_PARTITION;
+import static org.onap.policy.common.endpoints.properties.PolicyEndPointProperties.PROPERTY_HTTP_HTTPS_SUFFIX;
+import static org.onap.policy.common.endpoints.properties.PolicyEndPointProperties.PROPERTY_MANAGED_SUFFIX;
+import static org.onap.policy.common.endpoints.properties.PolicyEndPointProperties.PROPERTY_TOPIC_EFFECTIVE_TOPIC_SUFFIX;
+import static org.onap.policy.common.endpoints.properties.PolicyEndPointProperties.PROPERTY_TOPIC_SERVERS_SUFFIX;
+import static org.onap.policy.common.endpoints.properties.PolicyEndPointProperties.PROPERTY_TOPIC_SINK_PARTITION_KEY_SUFFIX;
+
+import java.util.Arrays;
+import lombok.Getter;
+import org.onap.policy.common.endpoints.parameters.TopicParameters;
+
+public class KafkaTopicPropertyBuilder extends TopicPropertyBuilder {
+
+    public static final String SERVER = "my-server";
+    public static final String TOPIC2 = "my-topic-2";
+
+    @Getter
+    private TopicParameters params = new TopicParameters();
+
+    /**
+     * Constructs the object.
+     *
+     * @param prefix the prefix for the properties to be built
+     */
+    public KafkaTopicPropertyBuilder(String prefix) {
+        super(prefix);
+    }
+
+    /**
+     * Adds a topic and configures it's properties with default values.
+     *
+     * @param topic the topic to be added
+     * @return this builder
+     */
+    public KafkaTopicPropertyBuilder makeTopic(String topic) {
+        addTopic(topic);
+
+        setTopicProperty(PROPERTY_TOPIC_EFFECTIVE_TOPIC_SUFFIX, MY_EFFECTIVE_TOPIC);
+        setTopicProperty(PROPERTY_MANAGED_SUFFIX, "true");
+        setTopicProperty(PROPERTY_HTTP_HTTPS_SUFFIX, "true");
+        setTopicProperty(PROPERTY_TOPIC_SINK_PARTITION_KEY_SUFFIX, MY_PARTITION);
+        setTopicProperty(PROPERTY_TOPIC_SERVERS_SUFFIX, SERVER);
+
+        params.setTopicCommInfrastructure("kafka");
+        params.setTopic(topic);
+        params.setEffectiveTopic(MY_EFFECTIVE_TOPIC);
+        params.setManaged(true);
+        params.setUseHttps(true);
+        params.setPartitionId(MY_PARTITION);
+        params.setServers(Arrays.asList(SERVER));
+
+        return this;
+    }
+}
diff --git a/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSinkTest.java b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSinkTest.java
new file mode 100644
index 00000000..503e5131
--- /dev/null
+++ b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSinkTest.java
@@ -0,0 +1,34 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP Policy Engine - Common Modules
+ * ================================================================================
+ * Copyright (C) 2018-2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.endpoints.event.comm.bus;
+
+import static org.junit.Assert.assertNotNull;
+
+import org.junit.Test;
+
+public class KafkaTopicSinkTest {
+
+    @Test
+    public void test() {
+        assertNotNull(KafkaTopicFactories.getSinkFactory());
+    }
+
+}
diff --git a/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSourceFactoryTest.java b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSourceFactoryTest.java
new file mode 100644
index 00000000..6fa80a41
--- /dev/null
+++ b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSourceFactoryTest.java
@@ -0,0 +1,158 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP Policy Engine - Common Modules
+ * ================================================================================
+ * Copyright (C) 2018-2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.endpoints.event.comm.bus;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.onap.policy.common.endpoints.properties.PolicyEndPointProperties.PROPERTY_KAFKA_SOURCE_TOPICS;
+
+import java.util.Deque;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Properties;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.common.endpoints.event.comm.Topic;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
+import org.onap.policy.common.endpoints.properties.PolicyEndPointProperties;
+
+public class KafkaTopicSourceFactoryTest extends KafkaTopicFactoryTestBase<KafkaTopicSource> {
+
+    private SourceFactory factory;
+
+    /**
+     * Creates the object to be tested.
+     */
+    @Before
+    @Override
+    public void setUp() {
+        super.setUp();
+
+        factory = new SourceFactory();
+    }
+
+    @After
+    public void tearDown() {
+        factory.destroy();
+    }
+
+    @Test
+    @Override
+    public void testBuildBusTopicParams() {
+        super.testBuildBusTopicParams_Ex();
+    }
+
+    @Test
+    @Override
+    public void testBuildProperties() {
+
+        initFactory();
+
+        List<KafkaTopicSource> topics = buildTopics(makePropBuilder().makeTopic(MY_TOPIC).build());
+        assertEquals(1, topics.size());
+        assertEquals(MY_TOPIC, topics.get(0).getTopic());
+    }
+
+    @Test
+    @Override
+    public void testDestroyString_testGet_testInventory() {
+        super.testDestroyString_Ex();
+    }
+
+    @Test
+    public void testGet() {
+        super.testGet_Ex();
+    }
+
+    @Test
+    public void testToString() {
+        assertTrue(factory.toString().startsWith("IndexedKafkaTopicSourceFactory ["));
+    }
+
+    @Override
+    protected void initFactory() {
+        if (factory != null) {
+            factory.destroy();
+        }
+
+        factory = new SourceFactory();
+    }
+
+    @Override
+    protected List<KafkaTopicSource> buildTopics(Properties properties) {
+        return factory.build(properties);
+    }
+
+    @Override
+    protected KafkaTopicSource buildTopic(BusTopicParams params) {
+        return factory.build(params);
+    }
+
+    @Override
+    protected KafkaTopicSource buildTopic(List<String> servers, String topic) {
+        return factory.build(servers, topic);
+    }
+
+    @Override
+    protected void destroyFactory() {
+        factory.destroy();
+    }
+
+    @Override
+    protected void destroyTopic(String topic) {
+        factory.destroy(topic);
+    }
+
+    @Override
+    protected List<KafkaTopicSource> getInventory() {
+        return factory.inventory();
+    }
+
+    @Override
+    protected KafkaTopicSource getTopic(String topic) {
+        return factory.get(topic);
+    }
+
+    @Override
+    protected BusTopicParams getLastParams() {
+        return factory.params.getLast();
+    }
+
+    @Override
+    protected TopicPropertyBuilder makePropBuilder() {
+        return new KafkaTopicPropertyBuilder(PROPERTY_KAFKA_SOURCE_TOPICS);
+    }
+
+    /**
+     * Factory that records the parameters of all of the sources it creates.
+     */
+    private static class SourceFactory extends IndexedKafkaTopicSourceFactory {
+        private Deque<BusTopicParams> params = new LinkedList<>();
+
+        @Override
+        protected KafkaTopicSource makeSource(BusTopicParams busTopicParams) {
+            params.add(busTopicParams);
+            return super.makeSource(busTopicParams);
+        }
+    }
+}
diff --git a/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSourceTest.java b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSourceTest.java
new file mode 100644
index 00000000..ee2d1d7b
--- /dev/null
+++ b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/KafkaTopicSourceTest.java
@@ -0,0 +1,34 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP Policy Engine - Common Modules
+ * ================================================================================
+ * Copyright (C) 2018-2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.endpoints.event.comm.bus;
+
+import static org.junit.Assert.assertNotNull;
+
+import org.junit.Test;
+
+public class KafkaTopicSourceTest {
+
+    @Test
+    public void verifyKafkaTopicFactoriesNotNull() {
+        assertNotNull(KafkaTopicFactories.getSourceFactory());
+    }
+
+}
diff --git a/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusConsumerTest.java b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusConsumerTest.java
index 21050f97..da9f792b 100644
--- a/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusConsumerTest.java
+++ b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/internal/BusConsumerTest.java
@@ -46,6 +46,7 @@ import org.onap.policy.common.endpoints.event.comm.bus.internal.BusConsumer.Dmaa
 import org.onap.policy.common.endpoints.event.comm.bus.internal.BusConsumer.DmaapConsumerWrapper;
 import org.onap.policy.common.endpoints.event.comm.bus.internal.BusConsumer.DmaapDmeConsumerWrapper;
 import org.onap.policy.common.endpoints.event.comm.bus.internal.BusConsumer.FetchingBusConsumer;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusConsumer.KafkaConsumerWrapper;
 import org.onap.policy.common.endpoints.properties.PolicyEndPointProperties;
 import org.powermock.reflect.Whitebox;
 
@@ -295,6 +296,17 @@ public class BusConsumerTest extends TopicTestBase {
         new DmaapDmeConsumerWrapper(makeBuilder().partner(null).build());
     }
 
+    @Test
+    public void testKafkaConsumerWrapper() throws Exception {
+        // verify that different wrappers can be built
+        assertThatCode(() -> new KafkaConsumerWrapper(makeBuilder().build())).doesNotThrowAnyException();
+    }
+
+    @Test
+    public void testKafkaConsumerWrapperToString() throws Exception {
+        assertNotNull(new KafkaConsumerWrapper(makeBuilder().build()) {}.toString());
+    }
+
     private static class FetchingBusConsumerImpl extends FetchingBusConsumer {
 
         protected FetchingBusConsumerImpl(BusTopicParams busTopicParams) {
diff --git a/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/internal/SingleThreadedKafkaTopicSourceTest.java b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/internal/SingleThreadedKafkaTopicSourceTest.java
new file mode 100644
index 00000000..cc096585
--- /dev/null
+++ b/policy-endpoints/src/test/java/org/onap/policy/common/endpoints/event/comm/bus/internal/SingleThreadedKafkaTopicSourceTest.java
@@ -0,0 +1,63 @@
+/*
+ * ============LICENSE_START=======================================================
+ * policy-endpoints
+ * ================================================================================
+ * Copyright (C) 2018-2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.endpoints.event.comm.bus.internal;
+
+import static org.assertj.core.api.Assertions.assertThatCode;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
+import org.onap.policy.common.endpoints.event.comm.bus.TopicTestBase;
+import org.onap.policy.common.utils.gson.GsonTestUtils;
+
+public class SingleThreadedKafkaTopicSourceTest extends TopicTestBase {
+    private SingleThreadedKafkaTopicSource source;
+
+    /**
+     * Creates the object to be tested.
+     */
+    @Before
+    @Override
+    public void setUp() {
+        super.setUp();
+
+        source = new SingleThreadedKafkaTopicSource(makeBuilder().build());
+    }
+
+    @After
+    public void tearDown() {
+        source.shutdown();
+    }
+
+    @Test
+    public void testToString() {
+        assertTrue(source.toString().startsWith("SingleThreadedKafkaTopicSource ["));
+    }
+
+    @Test
+    public void testGetTopicCommInfrastructure() {
+        assertEquals(CommInfrastructure.KAFKA, source.getTopicCommInfrastructure());
+    }
+
+}