Add possibility to modify the configuration for persistent connection

Issue-ID: DCAEGEN2-1483
Signed-off-by: Pawel <pawel.kasperkiewicz@nokia.com>
Change-Id: Ia5c0699359fe2317bea6177fe6dfce5c68579ba9

14 files changed, 275 insertions, 9 deletions

diff --git a/rest-services/cbs-client/pom.xml b/rest-services/cbs-client/pom.xml
index ea1eae08..9813d3c7 100644
--- a/rest-services/cbs-client/pom.xml
+++ b/rest-services/cbs-client/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>org.onap.dcaegen2.services.sdk</groupId>
         <artifactId>dcaegen2-services-sdk-rest-services</artifactId>
-        <version>1.6.0-SNAPSHOT</version>
+        <version>1.7.0-SNAPSHOT</version>
     </parent>
 
     <groupId>org.onap.dcaegen2.services.sdk.rest.services</groupId>
diff --git a/rest-services/dmaap-client/pom.xml b/rest-services/dmaap-client/pom.xml
index b8620311..54b9a37e 100644
--- a/rest-services/dmaap-client/pom.xml
+++ b/rest-services/dmaap-client/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>org.onap.dcaegen2.services.sdk</groupId>
     <artifactId>dcaegen2-services-sdk-rest-services</artifactId>
-    <version>1.6.0-SNAPSHOT</version>
+    <version>1.7.0-SNAPSHOT</version>
   </parent>
 
   <groupId>org.onap.dcaegen2.services.sdk.rest.services</groupId>
diff --git a/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/DmaapClientFactory.java b/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/DmaapClientFactory.java
index 95850078..ee4f6d38 100644
--- a/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/DmaapClientFactory.java
+++ b/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/DmaapClientFactory.java
@@ -23,6 +23,8 @@ import io.vavr.control.Option;
 import org.jetbrains.annotations.NotNull;
 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClient;
 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClientFactory;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.ConnectionPoolConfig;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.ImmutableConnectionPoolConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.ImmutableRetryConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.ImmutableRxHttpClientConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.RetryConfig;
@@ -68,6 +70,7 @@ public final class DmaapClientFactory {
 
     private static @NotNull RxHttpClient createHttpClient(DmaapClientConfiguration config) {
         RxHttpClientConfig clientConfig = ImmutableRxHttpClientConfig.builder()
+                .connectionPool(createConnectionPool(config))
                 .retryConfig(createRetry(config))
                 .build();
         return config.securityKeys() == null
@@ -85,5 +88,15 @@ public final class DmaapClientFactory {
                         .build())
                 .getOrNull();
     }
+
+    private static ConnectionPoolConfig createConnectionPool(DmaapClientConfiguration config){
+        return Option.of(config.connectionPoolConfig())
+                .map(cp -> ImmutableConnectionPoolConfig.builder()
+                        .connectionPool(cp.connectionPool())
+                        .maxIdleTime(Duration.ofSeconds(cp.maxIdleTime()))
+                        .maxLifeTime(Duration.ofSeconds(cp.maxLifeTime()))
+                        .build())
+                .getOrNull();
+    }
 }
 
diff --git a/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/model/config/DmaapClientConfiguration.java b/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/model/config/DmaapClientConfiguration.java
index 3e283511..6dcdf988 100644
--- a/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/model/config/DmaapClientConfiguration.java
+++ b/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/model/config/DmaapClientConfiguration.java
@@ -36,4 +36,8 @@ public interface DmaapClientConfiguration {
     default @Nullable DmaapRetryConfig retryConfig(){
         return null;
     }
+    @Value.Default
+    default @Nullable DmaapConnectionPoolConfig connectionPoolConfig (){
+        return null;
+    }
 }
diff --git a/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/model/config/DmaapConnectionPoolConfig.java b/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/model/config/DmaapConnectionPoolConfig.java
new file mode 100644
index 00000000..38166e4e
--- /dev/null
+++ b/rest-services/dmaap-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/model/config/DmaapConnectionPoolConfig.java
@@ -0,0 +1,39 @@
+/*
+ * ============LICENSE_START====================================
+ * DCAEGEN2-SERVICES-SDK
+ * =========================================================
+ * Copyright (C) 2021 Nokia. All rights reserved.
+ * =========================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=====================================
+ */
+package org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.config;
+
+import org.immutables.value.Value;
+
+@Value.Immutable
+public interface DmaapConnectionPoolConfig {
+
+    @Value.Default
+    default int connectionPool(){
+        return 16;
+    }
+    @Value.Default
+    default int maxLifeTime(){
+        return Integer.MAX_VALUE;
+    }
+    @Value.Default
+    default int maxIdleTime(){
+        return  Integer.MAX_VALUE;
+    }
+}
\ No newline at end of file
diff --git a/rest-services/dmaap-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/MessageRouterPublisherIT.java b/rest-services/dmaap-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/MessageRouterPublisherIT.java
index 825ea395..ffd301c3 100644
--- a/rest-services/dmaap-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/MessageRouterPublisherIT.java
+++ b/rest-services/dmaap-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/MessageRouterPublisherIT.java
@@ -34,6 +34,7 @@ import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.MessageRo
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.MessageRouterPublishResponse;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.MessageRouterSubscribeRequest;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.MessageRouterSubscribeResponse;
+import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.config.ImmutableDmaapConnectionPoolConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.config.ImmutableDmaapRetryConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.config.ImmutableMessageRouterPublisherConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.config.MessageRouterPublisherConfig;
@@ -337,6 +338,7 @@ class MessageRouterPublisherIT {
 
     @Test
     void publisher_shouldRetryWhenRetryableHttpCodeAndSuccessfullyPublish() {
+        //given
         final String topic = "TOPIC11";
         final String topicUrl = String.format("%s/%s", PROXY_MOCK_EVENTS_PATH, topic);
 
@@ -369,6 +371,7 @@ class MessageRouterPublisherIT {
 
     @Test
     void publisher_shouldRetryWhenClientTimeoutAndSuccessfullyPublish() {
+        //given
         final String topic = "TOPIC12";
         final String topicUrl = String.format("%s/%s", PROXY_MOCK_EVENTS_PATH, topic);
 
@@ -400,6 +403,7 @@ class MessageRouterPublisherIT {
 
     @Test
     void publisher_shouldRetryManyTimesAndSuccessfullyPublish() {
+        //given
         final String topic = "TOPIC13";
         final String topicUrl = String.format("%s/%s", PROXY_MOCK_EVENTS_PATH, topic);
 
@@ -440,6 +444,7 @@ class MessageRouterPublisherIT {
 
     @Test
     void publisher_shouldHandleLastRetryError500() {
+        //given
         final String topic = "TOPIC14";
         final String topicUrl = String.format("%s/%s", PROXY_MOCK_EVENTS_PATH, topic);
 
@@ -472,6 +477,70 @@ class MessageRouterPublisherIT {
 
         MOCK_SERVER_CLIENT.verify(request().withPath(path), VerificationTimes.exactly(2));
     }
+    @Test
+    void publisher_shouldSuccessfullyPublishWhenConnectionPoolConfigurationIsSet() {
+        //given
+        final String topic = "TOPIC15";
+        final String topicUrl = String.format("%s/%s", PROXY_MOCK_EVENTS_PATH, topic);
+
+        final List<String> singleJsonMessage = List.of("{\"message\":\"message1\"}");
+        final List<JsonElement> expectedItems = getAsJsonElements(singleJsonMessage);
+        final Flux<JsonElement> plainBatch = plainBatch(singleJsonMessage);
+
+        final MessageRouterPublishRequest publishRequest = createPublishRequest(topicUrl, Duration.ofSeconds(1));
+        final MessageRouterPublishResponse expectedResponse = successPublishResponse(expectedItems);
+
+        final String path = String.format("/events/%s", topic);
+        MOCK_SERVER_CLIENT
+                .when(request().withPath(path), Times.once())
+                .respond(response().withStatusCode(200));
+
+        final MessageRouterPublisher publisher = DmaapClientFactory.createMessageRouterPublisher(connectionPoolConfiguration());
+
+        //when
+        final Flux<MessageRouterPublishResponse> result = publisher.put(publishRequest, plainBatch);
+
+        //then
+        StepVerifier.create(result)
+                .expectNext(expectedResponse)
+                .expectComplete()
+                .verify();
+
+        MOCK_SERVER_CLIENT.verify(request().withPath(path).withKeepAlive(true), VerificationTimes.exactly(1));
+    }
+
+    @Test
+    void publisher_shouldRetryWhenClientTimeoutAndSuccessfullyPublishWithConnectionPoolConfiguration() {
+        //given
+        final String topic = "TOPIC16";
+        final String topicUrl = String.format("%s/%s", PROXY_MOCK_EVENTS_PATH, topic);
+
+        final List<String> singleJsonMessage = List.of("{\"message\":\"message1\"}");
+        final List<JsonElement> expectedItems = getAsJsonElements(singleJsonMessage);
+        final Flux<JsonElement> plainBatch = plainBatch(singleJsonMessage);
+
+        final MessageRouterPublishRequest publishRequest = createPublishRequest(topicUrl, Duration.ofSeconds(1));
+        final MessageRouterPublishResponse expectedResponse = successPublishResponse(expectedItems);
+
+        final String path = String.format("/events/%s", topic);
+        MOCK_SERVER_CLIENT
+                .when(request().withPath(path), Times.once())
+                .respond(response().withDelay(TimeUnit.SECONDS, 10));
+
+        final MessageRouterPublisher publisher = DmaapClientFactory.createMessageRouterPublisher(connectionPoolAndRetryConfiguration());
+
+        //when
+        final Flux<MessageRouterPublishResponse> result = publisher.put(publishRequest, plainBatch);
+
+        //then
+        StepVerifier.create(result)
+                .expectNext(expectedResponse)
+                .expectComplete()
+                .verify();
+
+        MOCK_SERVER_CLIENT.verify(request().withPath(path).withKeepAlive(true), VerificationTimes.exactly(2));
+    }
+
 
     private MessageRouterPublisherConfig retryConfig(int retryInterval, int retryCount) {
         return ImmutableMessageRouterPublisherConfig.builder()
@@ -481,4 +550,27 @@ class MessageRouterPublisherIT {
                         .build())
                 .build();
     }
-}
+    private MessageRouterPublisherConfig connectionPoolConfiguration() {
+        return ImmutableMessageRouterPublisherConfig.builder()
+                .connectionPoolConfig(ImmutableDmaapConnectionPoolConfig.builder()
+                        .connectionPool(10)
+                        .maxIdleTime(10)
+                        .maxLifeTime(20)
+                        .build())
+                .build();
+    }
+
+    private MessageRouterPublisherConfig connectionPoolAndRetryConfiguration() {
+        return ImmutableMessageRouterPublisherConfig.builder()
+                .connectionPoolConfig(ImmutableDmaapConnectionPoolConfig.builder()
+                        .connectionPool(10)
+                        .maxIdleTime(10)
+                        .maxLifeTime(20)
+                        .build())
+                .retryConfig(ImmutableDmaapRetryConfig.builder()
+                        .retryIntervalInSeconds(1)
+                        .retryCount(1)
+                        .build())
+                .build();
+    }
+}
\ No newline at end of file
diff --git a/rest-services/dmaap-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/MessageRouterSubscriberIT.java b/rest-services/dmaap-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/MessageRouterSubscriberIT.java
index 2cc6d339..8f4edab0 100644
--- a/rest-services/dmaap-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/MessageRouterSubscriberIT.java
+++ b/rest-services/dmaap-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/dmaap/client/api/MessageRouterSubscriberIT.java
@@ -23,7 +23,6 @@ package org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.api;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import io.vavr.collection.List;
-import io.vavr.control.Try;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -33,6 +32,7 @@ import org.mockserver.verify.VerificationTimes;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.MessageRouterPublishRequest;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.MessageRouterSubscribeRequest;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.MessageRouterSubscribeResponse;
+import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.config.ImmutableDmaapConnectionPoolConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.config.ImmutableDmaapRetryConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.config.ImmutableMessageRouterSubscriberConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.config.MessageRouterPublisherConfig;
@@ -415,6 +415,34 @@ class MessageRouterSubscriberIT {
 
         MOCK_SERVER_CLIENT.verify(request().withPath(path), VerificationTimes.exactly(2));
     }
+    @Test
+    void subscriber_shouldSubscribeToTopicWithConnectionPoolConfiguration() {
+        //given
+        final String topic = "TOPIC4";
+        final String topicUrl = String.format("%s/%s", EVENTS_PATH, topic);
+        final MessageRouterPublishRequest publishRequest = createPublishRequest(topicUrl);
+        final MessageRouterSubscribeRequest subscribeRequest = createMRSubscribeRequest(topicUrl,
+                CONSUMER_GROUP, CONSUMER_ID);
+
+        final List<String> twoJsonMessages = List.of("{\"message\":\"message1\"}",
+                "{\"differentMessage\":\"message2\"}");
+        final List<JsonElement> messages = getAsJsonElements(twoJsonMessages);
+        final Flux<JsonObject> jsonMessageBatch = jsonBatch(twoJsonMessages);
+
+        final MessageRouterSubscriber subscriber = DmaapClientFactory.createMessageRouterSubscriber(connectionPoolConfiguration());
+
+        //when
+        registerTopic(publisher, publishRequest, subscriber, subscribeRequest);
+        final Flux<JsonElement> result = publisher.put(publishRequest, jsonMessageBatch)
+                .thenMany(subscriber.subscribeForElements(subscribeRequest, Duration.ofSeconds(1)));
+
+        //then
+        StepVerifier.create(result.take(2))
+                .expectNext(messages.get(0))
+                .expectNext(messages.get(1))
+                .expectComplete()
+                .verify(TIMEOUT);
+    }
 
     private MessageRouterSubscriberConfig retryConfig(int retryInterval, int retryCount) {
         return ImmutableMessageRouterSubscriberConfig.builder()
@@ -424,4 +452,14 @@ class MessageRouterSubscriberIT {
                         .build())
                 .build();
     }
+
+    private MessageRouterSubscriberConfig connectionPoolConfiguration() {
+        return ImmutableMessageRouterSubscriberConfig.builder()
+                .connectionPoolConfig(ImmutableDmaapConnectionPoolConfig.builder()
+                        .connectionPool(10)
+                        .maxIdleTime(10)
+                        .maxLifeTime(20)
+                        .build())
+                .build();
+    }
 }
diff --git a/rest-services/http-client/pom.xml b/rest-services/http-client/pom.xml
index d9a11065..6b0ab0c1 100644
--- a/rest-services/http-client/pom.xml
+++ b/rest-services/http-client/pom.xml
@@ -28,7 +28,7 @@
     <parent>
         <groupId>org.onap.dcaegen2.services.sdk</groupId>
         <artifactId>dcaegen2-services-sdk-rest-services</artifactId>
-        <version>1.6.0-SNAPSHOT</version>
+        <version>1.7.0-SNAPSHOT</version>
     </parent>
 
     <groupId>org.onap.dcaegen2.services.sdk.rest.services</groupId>
diff --git a/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClientFactory.java b/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClientFactory.java
index 118df52b..0567b1b4 100644
--- a/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClientFactory.java
+++ b/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClientFactory.java
@@ -23,11 +23,13 @@ package org.onap.dcaegen2.services.sdk.rest.services.adapters.http;
 import io.netty.handler.ssl.SslContext;
 import io.vavr.control.Option;
 import org.jetbrains.annotations.NotNull;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.ConnectionPoolConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.RxHttpClientConfig;
 import org.onap.dcaegen2.services.sdk.security.ssl.SecurityKeys;
 import org.onap.dcaegen2.services.sdk.security.ssl.SslFactory;
 import org.onap.dcaegen2.services.sdk.security.ssl.TrustStoreKeys;
 import reactor.netty.http.client.HttpClient;
+import reactor.netty.resources.ConnectionProvider;
 
 /**
  * @author <a href="mailto:piotr.jaszczyk@nokia.com">Piotr Jaszczyk</a>
@@ -44,8 +46,11 @@ public final class RxHttpClientFactory {
         return new RxHttpClient(HttpClient.create());
     }
 
-    public static RxHttpClient create(RxHttpClientConfig config) {
-        return createWithConfig(HttpClient.create(), config);
+    public static RxHttpClient create(RxHttpClientConfig config){
+        return Option.of(config.connectionPool())
+                .map(RxHttpClientFactory::createConnectionProvider)
+                .map(provider -> createWithConfig(HttpClient.create(provider), config))
+                .getOrElse(createWithConfig(HttpClient.create(), config));
     }
 
     public static RxHttpClient create(SecurityKeys securityKeys) {
@@ -93,4 +98,13 @@ public final class RxHttpClientFactory {
                 .map(retryConfig -> new RxHttpClient(httpClient, retryConfig))
                 .getOrElse(() -> new RxHttpClient(httpClient));
     }
+
+    @NotNull
+    private static ConnectionProvider createConnectionProvider(ConnectionPoolConfig connectionPoolConfig) {
+        return ConnectionProvider.builder("fixed")
+                .maxConnections(connectionPoolConfig.connectionPool())
+                .maxIdleTime(connectionPoolConfig.maxIdleTime())
+                .maxLifeTime(connectionPoolConfig.maxLifeTime())
+                .build();
+    }
 }
diff --git a/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/config/ConnectionPoolConfig.java b/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/config/ConnectionPoolConfig.java
new file mode 100644
index 00000000..d1d5c565
--- /dev/null
+++ b/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/config/ConnectionPoolConfig.java
@@ -0,0 +1,33 @@
+/*
+ * ============LICENSE_START====================================
+ * DCAEGEN2-SERVICES-SDK
+ * =========================================================
+ * Copyright (C) 2021 Nokia. All rights reserved.
+ * =========================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=====================================
+ */
+
+package org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config;
+
+import org.immutables.value.Value;
+
+import java.time.Duration;
+
+@Value.Immutable
+public interface ConnectionPoolConfig {
+
+    int connectionPool();
+    Duration maxIdleTime();
+    Duration maxLifeTime();
+}
\ No newline at end of file
diff --git a/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/config/RxHttpClientConfig.java b/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/config/RxHttpClientConfig.java
index 78a88a47..b17a35cd 100644
--- a/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/config/RxHttpClientConfig.java
+++ b/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/config/RxHttpClientConfig.java
@@ -26,4 +26,5 @@ import org.jetbrains.annotations.Nullable;
 @Value.Immutable
 public interface RxHttpClientConfig {
     @Nullable RetryConfig retryConfig();
+    @Nullable ConnectionPoolConfig connectionPool();
 }
diff --git a/rest-services/http-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClientIT.java b/rest-services/http-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClientIT.java
index 8d076e02..ff4f0297 100644
--- a/rest-services/http-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClientIT.java
+++ b/rest-services/http-client/src/test/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClientIT.java
@@ -26,6 +26,7 @@ import io.vavr.Tuple;
 import io.vavr.collection.HashSet;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.Test;
+import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.ImmutableConnectionPoolConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.ImmutableRetryConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.ImmutableRxHttpClientConfig;
 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.exceptions.HttpException;
@@ -336,6 +337,28 @@ class RxHttpClientIT {
         assertNoRetry();
     }
 
+    @Test
+    void simpleGetWithCustomConnectionPool() throws Exception {
+        // given
+        final HttpRequest httpRequest = requestFor("/sample-get")
+                .method(HttpMethod.GET)
+                .build();
+        final RxHttpClient cut = RxHttpClientFactory.create(ImmutableRxHttpClientConfig.builder()
+                .connectionPool(defaultConnectionPoolConfig())
+                .build());
+
+        // when
+        final Mono<String> bodyAsString = cut.call(httpRequest)
+                .doOnNext(HttpResponse::throwIfUnsuccessful)
+                .map(HttpResponse::bodyAsString);
+
+        // then
+        StepVerifier.create(bodyAsString)
+                .expectNext("OK")
+                .expectComplete()
+                .verify(TIMEOUT);
+    }
+
     private ImmutableHttpRequest.Builder requestFor(String path) throws MalformedURLException {
         return ImmutableHttpRequest.builder()
                 .url(new URL("http", HTTP_SERVER.host(), HTTP_SERVER.port(), path).toString());
@@ -367,4 +390,13 @@ class RxHttpClientIT {
     private void assert400(HttpResponse httpResponse) {
         assertThat(httpResponse.statusCode()).isEqualTo(400);
     }
+
+    private ImmutableConnectionPoolConfig defaultConnectionPoolConfig(){
+        return ImmutableConnectionPoolConfig
+                .builder()
+                .connectionPool(1)
+                .maxIdleTime(Duration.ofSeconds(5))
+                .maxLifeTime(Duration.ofSeconds(10))
+                .build();
+    }
 }
diff --git a/rest-services/model/pom.xml b/rest-services/model/pom.xml
index d75c2e18..8f259d0f 100644
--- a/rest-services/model/pom.xml
+++ b/rest-services/model/pom.xml
@@ -27,7 +27,7 @@
     <parent>
         <groupId>org.onap.dcaegen2.services.sdk</groupId>
         <artifactId>dcaegen2-services-sdk-rest-services</artifactId>
-        <version>1.6.0-SNAPSHOT</version>
+        <version>1.7.0-SNAPSHOT</version>
     </parent>
 
     <groupId>org.onap.dcaegen2.services.sdk.rest.services</groupId>
diff --git a/rest-services/pom.xml b/rest-services/pom.xml
index 5e22eeac..7a3277f0 100644
--- a/rest-services/pom.xml
+++ b/rest-services/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>org.onap.dcaegen2.services</groupId>
     <artifactId>sdk</artifactId>
-    <version>1.6.0-SNAPSHOT</version>
+    <version>1.7.0-SNAPSHOT</version>
   </parent>
 
   <groupId>org.onap.dcaegen2.services.sdk</groupId>