Simplify DmaaP Publisher and consumer interfaces

Change-Id: Iaa7d870e8bd33687047832960c86adb7e97d969c
Issue-ID: DCAEGEN2-922
Signed-off-by: piotr.karas <piotr.karas@nokia.com>

1 files changed, 103 insertions, 0 deletions

diff --git a/prh-dmaap-client/src/main/java/org/onap/dcaegen2/services/prh/service/producer/DMaaPPublisherReactiveHttpClient.java b/prh-dmaap-client/src/main/java/org/onap/dcaegen2/services/prh/service/producer/DMaaPPublisherReactiveHttpClient.java
new file mode 100644
index 00000000..6919487a
--- /dev/null
+++ b/prh-dmaap-client/src/main/java/org/onap/dcaegen2/services/prh/service/producer/DMaaPPublisherReactiveHttpClient.java
@@ -0,0 +1,103 @@
+/*
+ * ============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.producer;
+
+import static org.onap.dcaegen2.services.prh.model.CommonFunctions.createJsonBody;
+import static org.onap.dcaegen2.services.prh.model.logging.MdcVariables.REQUEST_ID;
+import static org.onap.dcaegen2.services.prh.model.logging.MdcVariables.X_INVOCATION_ID;
+import static org.onap.dcaegen2.services.prh.model.logging.MdcVariables.X_ONAP_REQUEST_ID;
+
+import java.net.URI;
+import java.util.UUID;
+import org.onap.dcaegen2.services.prh.config.DmaapPublisherConfiguration;
+import org.onap.dcaegen2.services.prh.model.ConsumerDmaapModel;
+import org.slf4j.MDC;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.client.RestTemplate;
+import org.springframework.web.util.DefaultUriBuilderFactory;
+import reactor.core.publisher.Mono;
+
+
+
+/**
+ * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 7/4/18
+ */
+public class DMaaPPublisherReactiveHttpClient {
+
+    private final String dmaapHostName;
+    private final Integer dmaapPortNumber;
+    private final String dmaapProtocol;
+    private final String dmaapTopicName;
+    private final String dmaapContentType;
+
+    private RestTemplate restTemplate;
+
+    /**
+     * Constructor DMaaPPublisherReactiveHttpClient.
+     *
+     * @param dmaapPublisherConfiguration - DMaaP producer configuration object
+     */
+    public DMaaPPublisherReactiveHttpClient(DmaapPublisherConfiguration dmaapPublisherConfiguration) {
+        this.dmaapHostName = dmaapPublisherConfiguration.dmaapHostName();
+        this.dmaapProtocol = dmaapPublisherConfiguration.dmaapProtocol();
+        this.dmaapPortNumber = dmaapPublisherConfiguration.dmaapPortNumber();
+        this.dmaapTopicName = dmaapPublisherConfiguration.dmaapTopicName();
+        this.dmaapContentType = dmaapPublisherConfiguration.dmaapContentType();
+    }
+
+    /**
+     * Function for calling DMaaP HTTP producer - post request to DMaaP.
+     *
+     * @param consumerDmaapModelMono - object which will be sent to DMaaP
+     * @return status code of operation
+     */
+
+    public Mono<ResponseEntity<String>> getDMaaPProducerResponse(ConsumerDmaapModel consumerDmaapModelMono) {
+        return Mono.defer(() -> {
+            HttpEntity<String> request = new HttpEntity<>(createJsonBody(consumerDmaapModelMono), getAllHeaders());
+            return Mono.just(restTemplate.exchange(getUri(), HttpMethod.POST, request, String.class));
+
+        });
+    }
+
+    private HttpHeaders getAllHeaders() {
+        HttpHeaders headers = new HttpHeaders();
+        headers.set(X_ONAP_REQUEST_ID, MDC.get(REQUEST_ID));
+        headers.set(X_INVOCATION_ID, UUID.randomUUID().toString());
+        headers.set(HttpHeaders.CONTENT_TYPE, dmaapContentType);
+        return headers;
+
+    }
+
+    public DMaaPPublisherReactiveHttpClient createDMaaPWebClient(RestTemplate restTemplate) {
+        this.restTemplate = restTemplate;
+        return this;
+    }
+
+    URI getUri() {
+        return new DefaultUriBuilderFactory().builder().scheme(dmaapProtocol).host(dmaapHostName).port(dmaapPortNumber)
+            .path(dmaapTopicName).build();
+    }
+
+}