1 files changed, 129 insertions, 0 deletions
diff --git a/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/subscriber/DMaaPMRSubscriberImpl.java b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/subscriber/DMaaPMRSubscriberImpl.java
new file mode 100644
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+++ b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/subscriber/DMaaPMRSubscriberImpl.java
@@ -0,0 +1,129 @@
+/*
+ * ===============================LICENSE_START======================================
+ *  dcae-analytics
+ * ================================================================================
+ *    Copyright © 2017 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.openecomp.dcae.apod.analytics.dmaap.service.subscriber;
+
+import com.google.common.base.Optional;
+import com.google.inject.Inject;
+import com.google.inject.assistedinject.Assisted;
+import org.apache.commons.lang3.tuple.Pair;
+import org.apache.http.HttpHeaders;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.openecomp.dcae.apod.analytics.common.exception.DCAEAnalyticsRuntimeException;
+import org.openecomp.dcae.apod.analytics.dmaap.domain.config.DMaaPMRSubscriberConfig;
+import org.openecomp.dcae.apod.analytics.dmaap.domain.response.DMaaPMRSubscriberResponse;
+import org.openecomp.dcae.apod.analytics.dmaap.service.BaseDMaaPMRComponent;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.net.URI;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+import static org.openecomp.dcae.apod.analytics.common.utils.HTTPUtils.isSuccessfulResponseCode;
+import static java.lang.String.format;
+
+/**
+ * Concrete Implementation of {@link DMaaPMRSubscriber} which uses {@link HttpClient}
+ *
+ * @author Rajiv Singla . Creation Date: 10/13/2016.
+ */
+public class DMaaPMRSubscriberImpl extends BaseDMaaPMRComponent implements DMaaPMRSubscriber {
+
+    private static final Logger LOG = LoggerFactory.getLogger(DMaaPMRSubscriberImpl.class);
+
+    private final DMaaPMRSubscriberConfig subscriberConfig;
+    private final CloseableHttpClient closeableHttpClient;
+    private final URI subscriberUri;
+    private final Date subscriberCreationTime;
+
+    @Inject
+    public DMaaPMRSubscriberImpl(@Assisted DMaaPMRSubscriberConfig subscriberConfig,
+                                 CloseableHttpClient closeableHttpClient) {
+        this.subscriberConfig = subscriberConfig;
+        this.closeableHttpClient = closeableHttpClient;
+        this.subscriberUri = createSubscriberURI(subscriberConfig);
+        this.subscriberCreationTime = new Date();
+    }
+
+    @Override
+    public DMaaPMRSubscriberResponse fetchMessages() {
+
+        final String userName = subscriberConfig.getUserName();
+        final String userPassword = subscriberConfig.getUserPassword();
+
+        final HttpGet getRequest = new HttpGet(subscriberUri);
+
+        // add Authorization Header if username and password are present
+        final Optional<String> authHeader = getAuthHeader(userName, userPassword);
+        if (authHeader.isPresent()) {
+            getRequest.addHeader(HttpHeaders.AUTHORIZATION, authHeader.get());
+        } else {
+            LOG.debug("DMaaP MR Subscriber Authentication is disabled as username or password is not present.");
+        }
+
+        try {
+
+            final Pair<Integer, String> responsePair = closeableHttpClient.execute(getRequest, responseHandler());
+            final Integer responseCode = responsePair.getLeft();
+            final String responseBody = responsePair.getRight();
+
+            List<String> fetchedMessages = new LinkedList<>();
+            String responseMessage = responseBody;
+
+            // if messages were published successfully, return successful response
+            if (isSuccessfulResponseCode(responseCode)) {
+                if (responseBody != null) {
+                    fetchedMessages = convertJsonToStringMessages(responseBody);
+                    responseMessage = "Messages Fetched Successfully";
+                } else {
+                    responseMessage = "DMaaP Response Body had no messages";
+                }
+            } else {
+                LOG.error("Unable to fetch messages to DMaaP MR Topic. DMaaP MR unsuccessful Response Code: {}, " +
+                        "DMaaP Response Body: {}", responseCode, responseBody);
+            }
+
+            return createSubscriberResponse(responseCode, responseMessage, fetchedMessages);
+
+        } catch (IOException e) {
+
+            final String errorMessage =
+                    format("IO Exception while fetching messages from DMaaP Topic. Exception %s", e);
+            throw new DCAEAnalyticsRuntimeException(errorMessage, LOG, e);
+        }
+
+
+    }
+
+    @Override
+    public Date getSubscriberCreationTime() {
+        return new Date(subscriberCreationTime.getTime());
+    }
+
+    @Override
+    public void close() throws Exception {
+        closeableHttpClient.close();
+    }
+}