add xref dump meter

Author: vladak

opengrok-indexer/src/main/java/org/opengrok/indexer/web/Util.java

@@ -66,6 +66,7 @@
 import org.opengrok.indexer.history.Annotation;
 import org.opengrok.indexer.history.HistoryGuru;
 import org.opengrok.indexer.logger.LoggerFactory;
+import org.opengrok.indexer.util.Statistics;
 
 /**
  * Class for useful functions.
@@ -1208,7 +1209,7 @@ public static boolean dumpXref(Writer out, File file, boolean compressed, String
          */
         try (InputStream iss = new BufferedInputStream(new FileInputStream(file));
             Reader in = compressed ? new InputStreamReader(new GZIPInputStream(iss)) : new InputStreamReader(iss)) {
-                dumpXref(out, in, contextPath);
+                dumpXref(out, in, contextPath, file);
                 return true;
         } catch (IOException e) {
             LOGGER.log(Level.WARNING, String.format("An error occurred while piping file '%s'", file), e);
@@ -1222,21 +1223,24 @@ public static boolean dumpXref(Writer out, File file, boolean compressed, String
      * @param out dump destination
      * @param in source to read
      * @param contextPath an optional override of "/source/" as the context path
+     * @param file file related to the {@code in}, used for logging only
      * @throws IOException as defined by the given reader/writer
      * @throws NullPointerException if a parameter is {@code null}
      */
-    public static void dumpXref(Writer out, Reader in, String contextPath) throws IOException {
+    public static void dumpXref(Writer out, Reader in, String contextPath, File file) throws IOException {
 
         if (in == null || out == null) {
             return;
         }
 
+        Statistics stat = new Statistics();
         XrefSourceTransformer xform = new XrefSourceTransformer(in);
         xform.setWriter(out);
         xform.setContextPath(contextPath);
         while (xform.yylex()) {
             // Nothing else to do.
         }
+        stat.report(LOGGER, Level.FINEST, String.format("dumped xref '%s'", file), "xref.dump.latency");
     }
 
     /**

opengrok-web/src/main/webapp/list.jsp

@@ -16,7 +16,7 @@ information: Portions Copyright [yyyy] [name of copyright owner]
 
 CDDL HEADER END
 
-Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
+Copyright (c) 2005, 2023, Oracle and/or its affiliates. All rights reserved.
 Portions Copyright 2011 Jens Elkner.
 Portions Copyright (c) 2017-2020, Chris Fraire <cfraire@me.com>.
 
@@ -251,7 +251,7 @@ document.pageReady.push(function() { pageReadyList();});
                          */
                         r = new InputStreamReader(bin);
                         // dumpXref() is also useful here for translating links.
-                        Util.dumpXref(out, r, request.getContextPath());
+                        Util.dumpXref(out, r, request.getContextPath(), resourceFile);
                     } else if (g == AbstractAnalyzer.Genre.PLAIN) {
 %>
 <div id="src" data-navigate-window-enabled="<%= navigateWindowEnabled %>">
@@ -303,7 +303,7 @@ include file="/xref.jspf"
 <%
         }
     } else {
-        // Requesting cross referenced file with no known revision.
+        // Requesting cross-referenced file with no known revision.
         File xrefFile = cfg.findDataFile();
         if (xrefFile != null) {
 %>

opengrok-web/src/main/webapp/xref.jspf

@@ -16,7 +16,7 @@ information: Portions Copyright [yyyy] [name of copyright owner]
 
 CDDL HEADER END
 
-Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
+Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
 Portions Copyright 2011 Jens Elkner.
 Portions Copyright (c) 2017-2020, Chris Fraire <cfraire@me.com>.
 --%>
@@ -133,16 +133,14 @@ org.opengrok.indexer.web.QueryParameters"
     <pre><%
                     } else if (g == AbstractAnalyzer.Genre.HTML) {
                         /*
-                         * For backward compatibility, read the
-                         * OpenGrok-produced document using the system
-                         * default charset.
+                         * For backward compatibility, read the OpenGrok-produced document
+                         * using the system default charset.
                          */
                         r = new InputStreamReader(in);
                         /*
-                         * dumpXref() is also useful here for
-                         * translating links.
+                         * dumpXref() is also useful here for translating links.
                          */
-                        Util.dumpXref(out, r, request.getContextPath());
+                        Util.dumpXref(out, r, request.getContextPath(), resourceFile);
                     } else {
     %>Download binary file, <a href="<%= rawPath %>?<%= QueryParameters.REVISION_PARAM_EQ %>
 <%= Util.uriEncode(rev) %>"><%= basename %></a><%