actuator httpTrace endpoint

spring-boot-management/src/main/java/com/baeldung/spring/boot/management/trace/App.java

@@ -0,0 +1,13 @@
+package com.baeldung.spring.boot.management.trace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class App {
+
+    public static void main(String[] args) {
+        SpringApplication.run(App.class);
+    }
+    
+}

spring-boot-management/src/main/java/com/baeldung/spring/boot/management/trace/CustomTraceRepository.java

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+package com.baeldung.spring.boot.management.trace;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.boot.actuate.trace.http.HttpTrace;
+import org.springframework.boot.actuate.trace.http.HttpTraceRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class CustomTraceRepository implements HttpTraceRepository {
+
+    List<HttpTrace> traces = new ArrayList<>(1);
+
+    @Override
+    public List<HttpTrace> findAll() {
+        return traces;
+    }
+
+    @Override
+    public void add(HttpTrace trace) {
+        if ("GET".equals(trace.getRequest().getMethod())) {
+            traces.clear();
+            traces.add(trace);
+        }
+    }
+
+}

spring-boot-management/src/main/java/com/baeldung/spring/boot/management/trace/EchoController.java

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+package com.baeldung.spring.boot.management.trace;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController("echo")
+public class EchoController {
+
+    @GetMapping
+    public String echo(@RequestParam("msg") String msg) {
+        return "echoing " + msg;
+    }
+    
+}

spring-boot-management/src/main/java/com/baeldung/spring/boot/management/trace/TraceRequestFilter.java

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+package com.baeldung.spring.boot.management.trace;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+
+import org.springframework.boot.actuate.trace.http.HttpExchangeTracer;
+import org.springframework.boot.actuate.trace.http.HttpTraceRepository;
+import org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter;
+import org.springframework.stereotype.Component;
+
+@Component
+public class TraceRequestFilter extends HttpTraceFilter {
+  /**
+   * Create a new {@link HttpTraceFilter} instance.
+   *
+   * @param repository the trace repository
+   * @param tracer     used to trace exchanges
+   */
+  public TraceRequestFilter(HttpTraceRepository repository, HttpExchangeTracer tracer) {
+      super(repository, tracer);
+  }
+
+  @Override
+  protected boolean shouldNotFilter(HttpServletRequest request) throws ServletException {
+      return request.getServletPath().contains("actuator");
+  }
+}

spring-boot-management/src/main/resources/application.properties

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+management.endpoints.web.exposure.include=httptrace
+management.trace.http.include=REQUEST_HEADERS
+