1 files changed, 77 insertions, 0 deletions
diff --git a/dcae-analytics/dcae-analytics-tca-core/src/main/java/org/onap/dcae/analytics/tca/core/util/function/calculation/TcaEventNameFilter.java b/dcae-analytics/dcae-analytics-tca-core/src/main/java/org/onap/dcae/analytics/tca/core/util/function/calculation/TcaEventNameFilter.java
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+++ b/dcae-analytics/dcae-analytics-tca-core/src/main/java/org/onap/dcae/analytics/tca/core/util/function/calculation/TcaEventNameFilter.java
@@ -0,0 +1,77 @@
+/*
+ * ================================================================================
+ * 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.tca.core.util.function.calculation;
+
+import java.util.Optional;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import org.onap.dcae.analytics.model.cef.CommonEventHeader;
+import org.onap.dcae.analytics.model.cef.Event;
+import org.onap.dcae.analytics.model.cef.EventListener;
+import org.onap.dcae.analytics.tca.core.service.TcaExecutionContext;
+import org.onap.dcae.analytics.tca.model.policy.MetricsPerEventName;
+import org.onap.dcae.analytics.tca.model.policy.TcaPolicy;
+
+/**
+ * @author Rajiv Singla
+ */
+public class TcaEventNameFilter implements TcaCalculationFunction {
+
+    @Override
+    public TcaExecutionContext calculate(final TcaExecutionContext tcaExecutionContext) {
+
+        final String cefMessage = tcaExecutionContext.getCefMessage();
+        final EventListener eventListener = tcaExecutionContext.getTcaProcessingContext().getEventListener();
+
+        final Optional<String> eventNameOptional = Optional.ofNullable(eventListener)
+                .map(EventListener::getEvent)
+                .map(Event::getCommonEventHeader)
+                .map(CommonEventHeader::getEventName);
+
+        // Check Event name is present
+        if (!eventNameOptional.isPresent()) {
+            final String errorMessage =
+                    "Event -> Common Event Header -> Event Name not present. Invalid CEF Message: " + cefMessage;
+            setTerminatingMessage(errorMessage, tcaExecutionContext, true);
+            return tcaExecutionContext;
+        }
+
+        // Get CEF Message Event name and Event names in tca policy
+        final String cefMessageEventName = eventNameOptional.get();
+        final TcaPolicy tcaPolicy = tcaExecutionContext.getTcaPolicy();
+        final Set<String> policyEventNames = tcaPolicy.getMetricsPerEventName().stream()
+                .map(MetricsPerEventName::getEventName).collect(Collectors.toSet());
+
+        // Check CEF Message Event name matches any Policy Event names
+        if (!policyEventNames.contains(cefMessageEventName)) {
+            final String earlyTerminationMessage = String.format(
+                    "CEF Message Event name does not match any Policy Event Names. " +
+                            "Message EventName: %s, Policy Event Names: %s", cefMessageEventName, policyEventNames);
+            setTerminatingMessage(earlyTerminationMessage, tcaExecutionContext, false);
+            return tcaExecutionContext;
+        }
+
+        // CEF Messages one of the the Policy Event names
+        // do nothing
+
+        return tcaExecutionContext;
+    }
+}