Initial TCA commit into DCAEGEN2

[dcaegen2/analytics/tca.git] / dcae-analytics-tca / src / main / java / org / openecomp / dcae / apod / analytics / tca / processor / TCACEFJsonProcessor.java

diff --git a/dcae-analytics-tca/src/main/java/org/openecomp/dcae/apod/analytics/tca/processor/TCACEFJsonProcessor.java b/dcae-analytics-tca/src/main/java/org/openecomp/dcae/apod/analytics/tca/processor/TCACEFJsonProcessor.java
new file mode 100644 (file)
index 0000000..944eba6
--- /dev/null
+++ b/dcae-analytics-tca/src/main/java/org/openecomp/dcae/apod/analytics/tca/processor/TCACEFJsonProcessor.java
@@ -0,0 +1,98 @@
+/*
+ * ===============================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.tca.processor;
+
+import org.apache.commons.lang3.StringUtils;
+import org.openecomp.dcae.apod.analytics.common.exception.MessageProcessingException;
+import org.openecomp.dcae.apod.analytics.common.service.processor.AbstractMessageProcessor;
+import org.openecomp.dcae.apod.analytics.model.domain.cef.EventListener;
+import org.openecomp.dcae.apod.analytics.tca.utils.TCAUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+/**
+ *<p>
+ *    Processor that converts incoming presumed JSON string CEF message to {@link EventListener} object
+ *    <br>
+ *    Pre Conditions: None
+ *</p>
+ *
+ *  @author Rajiv Singla . Creation Date: 11/5/2016.
+ */
+public class TCACEFJsonProcessor extends AbstractMessageProcessor<TCACEFProcessorContext> {
+
+
+    private static final long serialVersionUID = 1L;
+
+    private static final Logger LOG = LoggerFactory.getLogger(TCACEFJsonProcessor.class);
+
+
+    @Override
+    public String getProcessorDescription() {
+        return "Converts incoming TCA CEF Message to Event Listener object";
+    }
+
+    @Override
+    public TCACEFProcessorContext processMessage(TCACEFProcessorContext processorContext) {
+
+        final String cefMessage = processorContext.getMessage();
+
+        // If CEF Message is null then processor should stop processing
+        if (cefMessage == null) {
+            String errorMessage = "Null CEF message cannot be converted to CEF Event Listener Object";
+            throw new MessageProcessingException(errorMessage, LOG, new IllegalArgumentException(errorMessage));
+        }
+
+        // If CEF Message is blank then processor stop processing
+        if (StringUtils.isBlank(cefMessage)) {
+            setTerminatingProcessingMessage("Blank CEF message cannot be converted to CEF Event Listener Object",
+                    processorContext);
+            return processorContext;
+        }
+
+        // trim cef message
+        final String trimmedCEFMessage = cefMessage.trim();
+
+        // if message does not start with curly brace and ends with curly brace, it is not a valid cef message
+        // processor will stop processing
+        if (!(trimmedCEFMessage.startsWith("{") && trimmedCEFMessage.endsWith("}"))) {
+            setTerminatingProcessingMessage("CEF Message must start with curly brace and must end with curly brace",
+                    processorContext);
+            return processorContext;
+        }
+
+        // try parsing the cef message
+        try {
+            final EventListener eventListener = TCAUtils.readValue(trimmedCEFMessage, EventListener.class);
+            setFinishedProcessingMessage("CEF JSON to Event Listener Conversion Successful", processorContext);
+            // set new Event Listener in the Processor Context
+            processorContext.setCEFEventListener(eventListener);
+            return processorContext;
+        } catch (IOException e) {
+            final String errorMessage = String.format("Parsing Failed for CEF Message: %s, Error: %s", cefMessage, e);
+            // If parsing fails throw an exception
+            throw new MessageProcessingException(errorMessage, LOG, e);
+        }
+
+    }
+}