1 files changed, 124 insertions, 0 deletions
diff --git a/dcae-analytics/dcae-analytics-web/src/main/java/org/onap/dcae/analytics/web/util/AnalyticsHttpUtils.java b/dcae-analytics/dcae-analytics-web/src/main/java/org/onap/dcae/analytics/web/util/AnalyticsHttpUtils.java
new file mode 100644
index 0000000..96e16f9
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+++ b/dcae-analytics/dcae-analytics-web/src/main/java/org/onap/dcae/analytics/web/util/AnalyticsHttpUtils.java
@@ -0,0 +1,124 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 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.onap.dcae.analytics.web.util;
+
+/**
+ * @author Rajiv Singla
+ */
+
+import java.nio.charset.Charset;
+import java.util.Collections;
+import java.util.Date;
+import java.util.Map;
+import java.util.Optional;
+
+import javax.annotation.Nullable;
+
+import org.onap.dcae.analytics.model.AnalyticsHttpConstants;
+import org.onap.dcae.analytics.model.AnalyticsModelConstants;
+import org.onap.dcae.analytics.model.configbindingservice.ConfigBindingServiceConstants;
+import org.onap.dcae.analytics.model.util.supplier.CreationTimestampSupplier;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.messaging.MessageHeaders;
+
+/**
+ * Provides utility methods for Analytics HTTP Operations
+ *
+ * @author Rajiv Singla
+ */
+public abstract class AnalyticsHttpUtils {
+
+    /**
+     * Creates default http headers for analytics http requests to other services like DMaaP, AAI etc with randomly
+     * generated request id header
+     *
+     * @return default analytics http headers
+     */
+    public static HttpHeaders createDefaultHttpHeaders() {
+        return createDefaultHttpHeaders(null);
+    }
+
+    /**
+     * Creates default http headers for analytics http requests to other services like DMaaP, AAI etc
+     *
+     * @param requestId request id
+     *
+     * @return default analytics http headers
+     */
+    public static HttpHeaders createDefaultHttpHeaders(@Nullable final String requestId) {
+
+        final HttpHeaders httpHeaders = new HttpHeaders();
+
+        // set analytics from app name header.
+        // Look up service name set by config service "SERVICE_NAME" environment variable or assign default value
+        httpHeaders.add(
+                AnalyticsHttpConstants.REQUEST_APP_NAME_HEADER_KEY,
+                ConfigBindingServiceConstants.SERVICE_NAME_ENV_VARIABLE_VALUE != null ?
+                        ConfigBindingServiceConstants.SERVICE_NAME_ENV_VARIABLE_VALUE :
+                        AnalyticsHttpConstants.REQUEST_APP_NAME_HEADER_DEFAULT_VALUE);
+
+        // if request id is not present create random UUID
+        httpHeaders.add(AnalyticsHttpConstants.REQUEST_ID_HEADER_KEY, requestId != null ?
+                requestId : AnalyticsWebUtils.REQUEST_ID_SUPPLIER.get());
+
+        // sub transaction id is created randomly for each http request
+        httpHeaders.add(AnalyticsHttpConstants.REQUEST_TRANSACTION_ID_HEADER_KEY,
+                AnalyticsWebUtils.RANDOM_ID_SUPPLIER.get());
+
+        // by default analytics will accept only json
+        httpHeaders.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON_UTF8));
+        httpHeaders.setContentType(MediaType.APPLICATION_JSON_UTF8);
+        httpHeaders.setAcceptCharset(
+                Collections.singletonList(Charset.forName(AnalyticsModelConstants.UTF8_CHARSET_NAME)));
+
+        return httpHeaders;
+    }
+
+
+    public static String getRequestId(final MessageHeaders messageHeaders) {
+        return Optional.ofNullable(messageHeaders.get(AnalyticsHttpConstants.REQUEST_ID_HEADER_KEY))
+                .map(requestId -> (String) requestId).orElse("UNKNOWN-REQUEST_ID");
+    }
+
+    public static String getTransactionId(final MessageHeaders messageHeaders) {
+        return Optional.ofNullable(messageHeaders.get(AnalyticsHttpConstants.REQUEST_TRANSACTION_ID_HEADER_KEY))
+                .map(transactionId -> (String) transactionId).orElse("UNKNOWN-TRANSACTION_ID");
+    }
+
+    public static Date getTimestampFromHeaders(final Map<String, Object> headers, final String headerTsKey) {
+        return Optional.ofNullable(headers.get(headerTsKey))
+                .map(ts -> CreationTimestampSupplier.getParsedDate((String) ts)).orElse(new Date());
+    }
+
+    public static String getRequestId(final HttpHeaders httpHeaders) {
+        return Optional.ofNullable(
+                httpHeaders.get(AnalyticsHttpConstants.REQUEST_ID_HEADER_KEY)).map(headerList ->
+                headerList.get(0)).orElse(AnalyticsWebUtils.REQUEST_ID_SUPPLIER.get());
+    }
+
+    public static String getTransactionId(final HttpHeaders httpHeaders) {
+        return Optional.ofNullable(
+                httpHeaders.get(AnalyticsHttpConstants.REQUEST_TRANSACTION_ID_HEADER_KEY)).map(headerList ->
+                headerList.get(0)).orElse(AnalyticsWebUtils.RANDOM_ID_SUPPLIER.get());
+    }
+
+
+}