1 files changed, 138 insertions, 0 deletions
diff --git a/dcae-analytics-tca/src/main/java/org/onap/dcae/apod/analytics/tca/processor/TCACEFPolicyThresholdsProcessor.java b/dcae-analytics-tca/src/main/java/org/onap/dcae/apod/analytics/tca/processor/TCACEFPolicyThresholdsProcessor.java
new file mode 100644
index 0000000..c7d780d
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+++ b/dcae-analytics-tca/src/main/java/org/onap/dcae/apod/analytics/tca/processor/TCACEFPolicyThresholdsProcessor.java
@@ -0,0 +1,138 @@
+/*
+ * ===============================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.onap.dcae.apod.analytics.tca.processor;
+
+import com.google.common.base.Optional;
+import com.google.common.collect.Table;
+import org.onap.dcae.apod.analytics.common.exception.MessageProcessingException;
+import org.onap.dcae.apod.analytics.model.domain.cef.Domain;
+import org.onap.dcae.apod.analytics.model.domain.cef.EventListener;
+import org.onap.dcae.apod.analytics.model.domain.policy.tca.MetricsPerEventName;
+import org.onap.dcae.apod.analytics.model.domain.policy.tca.TCAPolicy;
+import org.onap.dcae.apod.analytics.model.domain.policy.tca.Threshold;
+import org.onap.dcae.apod.analytics.tca.utils.TCAUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import javax.annotation.Nonnull;
+
+/**
+ *<p>
+ *     TCA CEF Policy Threshold processor
+ *     <br>
+ *     Pre Conditions: Domain and Functional Role must be present in CEF Event Listener Object
+ *</p>
+ *
+ * @author Rajiv Singla . Creation Date: 11/9/2016.
+ */
+public class TCACEFPolicyThresholdsProcessor extends AbstractTCAECEFPolicyProcessor {
+
+    private static final long serialVersionUID = 1L;
+
+    private static final Logger LOG = LoggerFactory.getLogger(TCACEFPolicyThresholdsProcessor.class);
+
+    @Override
+    public TCACEFProcessorContext preProcessor(@Nonnull TCACEFProcessorContext processorContext) {
+        // validates Domain and Functional Role are present
+        final EventListener eventListener = processorContext.getCEFEventListener();
+        final Domain domain = eventListener.getEvent().getCommonEventHeader().getDomain();
+        final String eventName = eventListener.getEvent().getCommonEventHeader().getEventName();
+        if (domain == null || eventName == null) {
+            final String errorMessage = "CEF Event Listener domain or eventName not Present. " +
+                    "Invalid use of this Processor";
+            throw new MessageProcessingException(errorMessage, LOG, new IllegalArgumentException(errorMessage));
+        }
+        return super.preProcessor(processorContext);
+    }
+
+    @Override
+    public String getProcessorDescription() {
+        return "Applies TCA Policy rules to incoming CEF message. If any thresholds are violated attaches max " +
+                "Severity violated threshold to TCA Processor Context";
+    }
+
+    @Override
+    public TCACEFProcessorContext processMessage(TCACEFProcessorContext processorContext) {
+
+        final String cefMessage = processorContext.getMessage();
+
+        // Determine domain and eventName
+        final EventListener eventListener = processorContext.getCEFEventListener();
+        final String eventName = eventListener.getEvent().getCommonEventHeader().getEventName();
+
+        // Get Table containing event Name and Thresholds Field Path
+        final TCAPolicy tcaPolicy = processorContext.getTCAPolicy();
+        final Table<String, String, List<Threshold>> eventNameFieldPathsTable =
+                TCAUtils.getPolicyEventNameThresholdsTableSupplier(tcaPolicy).get();
+
+        // Get Policy Field Paths for that event Name
+        final Map<String, List<Threshold>> policyFieldPathsMap = eventNameFieldPathsTable.row(eventName);
+        final Set<String> policyFieldPaths = policyFieldPathsMap.keySet();
+
+        // Get Json Values for Policy Fields
+        final Map<String, List<BigDecimal>> messageFieldValuesMap =
+                TCAUtils.getJsonPathValue(cefMessage, policyFieldPaths);
+
+        // Determine all violated thresholds per message field Path
+        final Map<String, Threshold> violatedThresholdsMap = new HashMap<>();
+        for (Map.Entry<String, List<BigDecimal>> messageFieldValuesMapEntry : messageFieldValuesMap.entrySet()) {
+            final String messageFieldPath = messageFieldValuesMapEntry.getKey();
+            final List<Threshold> messageFieldAssociatedPolicyThresholds = policyFieldPathsMap.get(messageFieldPath);
+            if (messageFieldAssociatedPolicyThresholds != null) {
+                final Optional<Threshold> thresholdOptional = TCAUtils.thresholdCalculator(
+                        messageFieldValuesMapEntry.getValue(), messageFieldAssociatedPolicyThresholds);
+                if (thresholdOptional.isPresent()) {
+                    violatedThresholdsMap.put(messageFieldPath, thresholdOptional.get());
+                }
+            }
+        }
+
+        // No threshold were violated
+        if (violatedThresholdsMap.isEmpty()) {
+
+            final String terminationMessage = "No Policy Threshold violated by the VES CEF Message.";
+            setTerminatingProcessingMessage(terminationMessage, processorContext);
+
+        } else {
+
+            // If there are policy violations then determine max priority violation
+            final Threshold maxSeverityThresholdViolation =
+                    TCAUtils.prioritizeThresholdViolations(violatedThresholdsMap);
+            final MetricsPerEventName violatedMetrics = TCAUtils.createViolatedMetrics(tcaPolicy,
+                    maxSeverityThresholdViolation, eventName);
+            // attach policy violation to processor Context
+            processorContext.setMetricsPerEventName(violatedMetrics);
+
+            final String finishMessage = String.format("Policy Threshold violation detected for threshold: %s",
+                    maxSeverityThresholdViolation);
+            setFinishedProcessingMessage(finishMessage, processorContext);
+
+        }
+
+        return processorContext;
+    }
+}