Added reactive DMaaPClient

Extracted WebCLientBuilder for
Producer and Consumer.
Added unit test for ReactiveProducerClient.

Change-Id: I632e6928813ed9feb48982900c173f741e4483e3
Issue-ID: DCAEGEN2-563
Signed-off-by: wasala <przemyslaw.wasala@nokia.com>

1 files changed, 87 insertions, 0 deletions

diff --git a/prh-dmaap-client/src/main/java/org/onap/dcaegen2/services/prh/service/consumer/DMaaPConsumerReactiveHttpClient.java b/prh-dmaap-client/src/main/java/org/onap/dcaegen2/services/prh/service/consumer/DMaaPConsumerReactiveHttpClient.java
new file mode 100644
index 00000000..23cdc98d
--- /dev/null
+++ b/prh-dmaap-client/src/main/java/org/onap/dcaegen2/services/prh/service/consumer/DMaaPConsumerReactiveHttpClient.java
@@ -0,0 +1,87 @@
+/*
+ * ============LICENSE_START=======================================================
+ * PNF-REGISTRATION-HANDLER
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA 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.dcaegen2.services.prh.service.consumer;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import org.apache.http.client.utils.URIBuilder;
+import org.onap.dcaegen2.services.prh.config.DmaapConsumerConfiguration;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+/**
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 6/26/18
+ */
+public class DMaaPConsumerReactiveHttpClient {
+
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+
+    private WebClient webClient;
+    private final String dmaapHostName;
+    private final String dmaapProtocol;
+    private final Integer dmaapPortNumber;
+    private final String dmaapTopicName;
+    private final String consumerGroup;
+    private final String consumerId;
+
+    public DMaaPConsumerReactiveHttpClient(DmaapConsumerConfiguration consumerConfiguration) {
+        this.dmaapHostName = consumerConfiguration.dmaapHostName();
+        this.dmaapProtocol = consumerConfiguration.dmaapProtocol();
+        this.dmaapPortNumber = consumerConfiguration.dmaapPortNumber();
+        this.dmaapTopicName = consumerConfiguration.dmaapTopicName();
+        this.consumerGroup = consumerConfiguration.consumerGroup();
+        this.consumerId = consumerConfiguration.consumerId();
+    }
+
+    public Mono<String> getDMaaPConsumerResponse() {
+        try {
+            return webClient
+                .get()
+                .uri(getUri())
+                .retrieve()
+                .onStatus(HttpStatus::is4xxClientError, clientResponse ->
+                    Mono.error(new Exception("HTTP 400"))
+                )
+                .onStatus(HttpStatus::is5xxServerError, clientResponse ->
+                    Mono.error(new Exception("HTTP 500")))
+                .bodyToMono(String.class);
+        } catch (URISyntaxException e) {
+            logger.warn("Exception while evaluating URI ");
+            return Mono.error(e);
+        }
+    }
+
+    private String createRequestPath() {
+        return dmaapTopicName + "/" + consumerGroup + "/" + consumerId;
+    }
+
+    public DMaaPConsumerReactiveHttpClient createDMaaPWebClient(WebClient webClient) {
+        this.webClient = webClient;
+        return this;
+    }
+
+    URI getUri() throws URISyntaxException {
+        return new URIBuilder().setScheme(dmaapProtocol).setHost(dmaapHostName).setPort(dmaapPortNumber)
+            .setPath(createRequestPath()).build();
+    }
+}