From ec9da7114637515d716911ef0d2458d6721a0ccb Mon Sep 17 00:00:00 2001
From: Jonathan Gallimore <jon@jrg.me.uk>
Date: Mon, 13 May 2024 12:32:04 +0100
Subject: [PATCH] TOMEE-4332 Patch SpringWebUtils for class loader issue

---
 .../cxf/jaxrs/springmvc/SpringWebUtils.java   | 92 +++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 tomee/apache-tomee/src/patch/java/org/apache/cxf/jaxrs/springmvc/SpringWebUtils.java

diff --git a/tomee/apache-tomee/src/patch/java/org/apache/cxf/jaxrs/springmvc/SpringWebUtils.java b/tomee/apache-tomee/src/patch/java/org/apache/cxf/jaxrs/springmvc/SpringWebUtils.java
new file mode 100644
index 00000000000..d3e7376d33b
--- /dev/null
+++ b/tomee/apache-tomee/src/patch/java/org/apache/cxf/jaxrs/springmvc/SpringWebUtils.java
@@ -0,0 +1,92 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ */
+
+package org.apache.cxf.jaxrs.springmvc;
+
+import jakarta.servlet.http.HttpServletRequest;
+import org.apache.cxf.common.classloader.ClassLoaderUtils;
+import org.apache.cxf.common.logging.LogUtils;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Optional;
+import java.util.logging.Logger;
+
+public final class SpringWebUtils {
+    private static final Logger LOG = LogUtils.getL7dLogger(SpringViewResolverProvider.class);
+    private static final boolean SPRING_WEB_DETECTED;
+    
+    static {
+        if (!Boolean.valueOf(System.getProperty("org.apache.cxf.jaxrs.springmvc.SpringWebUtils.enabled", "true"))) {
+            SPRING_WEB_DETECTED = false;
+        } else {
+            boolean springWebDetected = false;
+
+            try {
+                ClassLoaderUtils.loadClass("org.springframework.web.filter.ServerHttpObservationFilter",
+                        SpringWebUtils.class);
+                springWebDetected = true;
+            } catch (final ClassNotFoundException ex) {
+                /* Nothing to do, Spring Web is not present */
+            }
+
+            SPRING_WEB_DETECTED = springWebDetected;
+        }
+    }
+    
+    private SpringWebUtils() {
+    }
+
+    public static void setHttpRequestURI(HttpServletRequest request, String uriTemplate) {
+        request.setAttribute("org.springframework.web.servlet.HandlerMapping.bestMatchingPattern", uriTemplate);
+
+        // Populate the HTTP URI to be available to Spring Boot actuator metrics
+        if (SPRING_WEB_DETECTED) {
+            // rewritten to use reflection to ensure that if Spring Web is in the application's classloader, it is still called.
+
+            try {
+                final Class<?> observationFilterClass = ClassLoaderUtils.loadClass("org.springframework.web.filter.ServerHttpObservationFilter",
+                        SpringWebUtils.class);
+
+                final Method findObservationContextMethod = observationFilterClass.getDeclaredMethod("findObservationContext", HttpServletRequest.class);
+
+                final Object result = findObservationContextMethod.invoke(null, request);
+
+                if (result instanceof Optional) {
+                    Optional<?> optional = (Optional<?>) result;
+                    if (optional.isPresent()) {
+                        final Object o = optional.get();
+
+                        final Class<?> observationContextClass = ClassLoaderUtils.loadClass("org.springframework.http.server.observation.ServerRequestObservationContext",
+                                SpringWebUtils.class);
+
+                        if (observationContextClass.isInstance(o)) {
+                            final Method setPathPatternMethod = observationContextClass.getDeclaredMethod("setPathPattern", String.class);
+                            setPathPatternMethod.invoke(o, uriTemplate);
+                        }
+                    }
+                }
+
+            } catch (ClassNotFoundException | InvocationTargetException | NoSuchMethodException |
+                     IllegalAccessException e) {
+                LOG.warning("Unable to set path pattern on ServerRequestObservationContext: " + e.getMessage());
+            }
+        }
+    }
+}