1 files changed, 139 insertions, 0 deletions
diff --git a/openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/servlet/LoggingFilter.java b/openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/servlet/LoggingFilter.java
new file mode 100644
index 0000000000..f617ea6500
--- /dev/null
+++ b/openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/servlet/LoggingFilter.java
@@ -0,0 +1,139 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 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.sdc.logging.servlet;
+
+import org.omg.CORBA.Request;
+import org.slf4j.MDC;
+
+import javax.servlet.*;
+import javax.servlet.http.HttpServletRequest;
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.UUID;
+import java.util.concurrent.atomic.AtomicLong;
+
+
+/**
+ *
+ * <p>Pushes information required by EELF onto MDC (Mapped Diagnostic Context).</p>
+ *
+ * <p>This is servlet filter that should be configured in <i>web.xml</i> to be used. Example:</p>
+ *
+ * <pre>
+ *
+ *  &lt;filter&gt;
+ *      &lt;filter-name&gt;LoggingServletFilter&lt;/filter-name&gt;
+ *      &lt;filter-class&gt;org.openecomp.sdc.logging.servlet.LoggingFilter&lt;/filter-class&gt;
+ *  &lt;/filter&gt;
+ *
+ *  &lt;filter-mapping&gt;
+ *      &lt;filter-name&gt;LoggingServletFilter&lt;/filter-name&gt;
+ *      &lt;url-pattern&gt;/*&lt;/url-pattern&gt;
+ *  &lt;/filter-mapping&gt;
+ *
+ * </pre>
+ *
+ * @author evitaliy
+ * @since 25/07/2016.
+ */
+public class LoggingFilter implements Filter {
+
+    // should be cashed to avoid low-level call, but with a timeout to account for IP or FQDN changes
+    private static final HostAddressCache HOST_ADDRESS = new HostAddressCache();
+    private static final String UNKNOWN = "UNKNOWN";
+
+    public void destroy() {
+    }
+
+    public void doFilter(ServletRequest request, ServletResponse response,
+                         FilterChain chain) throws IOException, ServletException {
+
+        try {
+
+            MDC.clear();
+
+            MDC.put("RequestId", UUID.randomUUID().toString());
+            MDC.put("ServiceInstanceId", "N/A"); // not applicable
+            MDC.put("ServiceName", "ASDC");
+            MDC.put("InstanceUUID", "N/A");
+
+            // For some reason chooses IPv4 or IPv6 in a random way
+            MDC.put("RemoteHost", request.getRemoteHost());
+
+            InetAddress host = HOST_ADDRESS.get();
+
+            String ipAddress, hostName;
+            if (host == null) {
+                ipAddress = UNKNOWN;
+                hostName = UNKNOWN;
+            } else {
+                ipAddress = host.getHostAddress();
+                hostName = host.getHostName();
+            }
+
+            MDC.put("ServerIPAddress", ipAddress);
+            MDC.put("ServerFQDN", hostName);
+
+            if(request instanceof HttpServletRequest) {
+                String userName = ((HttpServletRequest) request).getHeader("USER_ID");
+                MDC.put("PartnerName", userName);
+            }
+            // TODO: Clarify what these stand for
+    //        MDC.put("AlertSeverity", );
+    //        MDC.put("Timer", );
+
+            chain.doFilter(request, response);
+
+        } finally {
+            MDC.clear();
+        }
+    }
+
+    public void init(FilterConfig config) throws ServletException { }
+
+    private static class HostAddressCache {
+
+        private static final long REFRESH_TIME = 1000L;
+
+        private AtomicLong lastUpdated = new AtomicLong(0L);
+        private InetAddress hostAddress;
+
+        public InetAddress get() {
+
+            long current = System.currentTimeMillis();
+            if (current - lastUpdated.get() > REFRESH_TIME) {
+
+                synchronized (this) {
+
+                    try {
+                        lastUpdated.set(current); // set now to register the attempt even if failed
+                        hostAddress = InetAddress.getLocalHost();
+                    } catch (UnknownHostException e) {
+                        hostAddress = null;
+                    }
+                }
+            }
+
+            return hostAddress;
+        }
+    }
+}