1 files changed, 91 insertions, 0 deletions
diff --git a/rest-services/common-dependency/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClient.java b/rest-services/common-dependency/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClient.java
new file mode 100644
index 00000000..f384c1c1
--- /dev/null
+++ b/rest-services/common-dependency/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/RxHttpClient.java
@@ -0,0 +1,91 @@
+/*
+ * ============LICENSE_START====================================
+ * DCAEGEN2-SERVICES-SDK
+ * =========================================================
+ * Copyright (C) 2019 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;
+
+import io.netty.handler.ssl.SslContext;
+import io.vavr.collection.Stream;
+import java.util.stream.Collectors;
+import org.onap.dcaegen2.services.sdk.rest.services.model.logging.RequestDiagnosticContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import reactor.core.publisher.Mono;
+import reactor.netty.http.client.HttpClient;
+import reactor.netty.http.client.HttpClient.ResponseReceiver;
+import reactor.netty.http.client.HttpClientRequest;
+import reactor.netty.http.client.HttpClientResponse;
+
+/**
+ * @since 1.1.4
+ */
+public class RxHttpClient {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(RxHttpClient.class);
+    private final HttpClient httpClient;
+
+    public static RxHttpClient create() {
+        return new RxHttpClient(HttpClient.create());
+    }
+
+    // TODO: hide netty from public api (io.netty.handler.ssl.SslContext)
+    public static RxHttpClient create(SslContext sslContext) {
+        return new RxHttpClient(HttpClient.create().secure(sslContextSpec -> sslContextSpec.sslContext(sslContext)));
+    }
+
+    RxHttpClient(HttpClient httpClient) {
+        this.httpClient = httpClient;
+    }
+
+    public Mono<HttpResponse> call(HttpRequest request) {
+        return prepareRequest(request)
+                .responseSingle((resp, content) ->
+                        content.asByteArray()
+                                .defaultIfEmpty(new byte[0])
+                                .map(bytes -> new NettyHttpResponse(request.url(), resp.status(), bytes)));
+    }
+
+    ResponseReceiver<?> prepareRequest(HttpRequest request) {
+        return httpClient
+                .doOnRequest((req, conn) -> logRequest(request.diagnosticContext(), req))
+                .doOnResponse((rsp, conn) -> logResponse(request.diagnosticContext(), rsp))
+                .headers(hdrs -> request.headers().forEach(hdr -> hdrs.set(hdr._1, hdr._2)))
+                .request(request.method().asNetty())
+                .send(request.body())
+                .uri(request.url());
+
+    }
+
+    private void logRequest(RequestDiagnosticContext context, HttpClientRequest httpClientRequest) {
+        context.withSlf4jMdc(LOGGER.isDebugEnabled(), () -> {
+            LOGGER.debug("Request: {} {} {}", httpClientRequest.method(), httpClientRequest.uri(),
+                    httpClientRequest.requestHeaders());
+            if (LOGGER.isTraceEnabled()) {
+                final String headers = Stream.ofAll(httpClientRequest.requestHeaders())
+                        .map(entry -> entry.getKey() + "=" + entry.getValue())
+                        .collect(Collectors.joining("\n"));
+                LOGGER.trace(headers);
+            }
+        });
+    }
+
+    private void logResponse(RequestDiagnosticContext context, HttpClientResponse httpClientResponse) {
+        context.withSlf4jMdc(LOGGER.isDebugEnabled(),
+                () -> LOGGER.debug("Response status: {}", httpClientResponse.status()));
+    }
+}