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diff --git a/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/utils/NetLoggerUtil.java b/policy-endpoints/src/main/java/org/onap/policy/common/endpoints/utils/NetLoggerUtil.java
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+/*
+ * ============LICENSE_START=======================================================
+ * policy-endpoints
+ * ================================================================================
+ * Copyright (C) 2019 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.policy.common.endpoints.utils;
+
+import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
+import org.onap.policy.common.endpoints.features.NetLoggerFeatureApi;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * A network logging utility class that allows drools applications code to access the
+ * network log (or other specified loggers) and logging features.
+ *
+ */
+public class NetLoggerUtil {
+
+ /**
+ * Loggers.
+ */
+ private static final Logger logger = LoggerFactory.getLogger(NetLoggerUtil.class);
+ private static final Logger netLogger = LoggerFactory.getLogger("network");
+
+ /**
+ * Constant for the system line separator.
+ */
+ public static final String SYSTEM_LS = System.lineSeparator();
+
+ /**
+ * Specifies if the message is coming in or going out.
+ */
+ public enum EventType {
+ IN, OUT
+ }
+
+ /**
+ * Get Network Logger.
+ *
+ * @return logger instance
+ */
+ public static Logger getNetworkLogger() {
+ return netLogger;
+ }
+
+ /**
+ * Logs a message to the network logger.
+ *
+ * @param type can either be IN or OUT
+ * @param protocol the protocol used to receive/send the message
+ * @param topic the topic the message came from or null if the type is REST
+ * @param message message to be logged
+ */
+ public static void log(EventType type, CommInfrastructure protocol, String topic, String message) {
+ log(netLogger, type, protocol, topic, message);
+ }
+
+ /**
+ * Logs a message to the specified logger (i.e. a controller logger).
+ *
+ * @param eventLogger the logger that will have the message appended
+ * @param type can either be IN or OUT
+ * @param protocol the protocol used to receive/send the message
+ * @param topic the topic the message came from or null if the type is REST
+ * @param message message to be logged
+ */
+ public static void log(Logger eventLogger, EventType type, CommInfrastructure protocol, String topic,
+ String message) {
+ if (eventLogger == null) {
+ logger.debug("the logger is null, defaulting to network logger");
+ eventLogger = netLogger;
+ }
+
+ if (featureBeforeLog(eventLogger, type, protocol, topic, message)) {
+ return;
+ }
+
+ eventLogger.info("[{}|{}|{}]{}{}", type, protocol, topic, SYSTEM_LS, message);
+
+ featureAfterLog(eventLogger, type, protocol, topic, message);
+ }
+
+ /**
+ * Executes features that pre-process a message before it is logged.
+ *
+ * @param eventLogger the logger that will have the message appended
+ * @param type can either be IN or OUT
+ * @param protocol the protocol used to receive/send the message
+ * @param topic the topic the message came from or null if the type is REST
+ * @param message message to be logged
+ *
+ * @return true if this feature intercepts and takes ownership of the operation
+ * preventing the invocation of lower priority features. False, otherwise
+ */
+ private static boolean featureBeforeLog(Logger eventLogger, EventType type, CommInfrastructure protocol,
+ String topic, String message) {
+ for (NetLoggerFeatureApi feature : NetLoggerFeatureApi.providers.getList()) {
+ try {
+ if (feature.beforeLog(eventLogger, type, protocol, topic, message)) {
+ return true;
+ }
+ } catch (Exception e) {
+ logger.error("feature {} before-log failure because of {}", feature.getClass().getName(),
+ e.getMessage(), e);
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Executes features that post-process a message after it is logged.
+ *
+ * @param eventLogger the logger that will have the message appended
+ * @param type can either be IN or OUT
+ * @param protocol the protocol used to receive/send the message
+ * @param topic the topic the message came from or null if the type is rest
+ * @param message message to be logged
+ *
+ * @return true if this feature intercepts and takes ownership of the operation
+ * preventing the invocation of lower priority features. False, otherwise
+ */
+ private static boolean featureAfterLog(Logger eventLogger, EventType type, CommInfrastructure protocol,
+ String topic, String message) {
+ for (NetLoggerFeatureApi feature : NetLoggerFeatureApi.providers.getList()) {
+ try {
+ if (feature.afterLog(eventLogger, type, protocol, topic, message)) {
+ return true;
+ }
+ } catch (Exception e) {
+ logger.error("feature {} after-log failure because of {}", feature.getClass().getName(), e.getMessage(),
+ e);
+ }
+ }
+ return false;
+ }
+
+}