[bs-87] Add /dump endpoint

* Just dumps ThreadInfo, simple but effective
* Implementation is part of TraceEndpoint

[Fixes #49056831]

spring-bootstrap-service/src/main/java/org/springframework/bootstrap/service/properties/EndpointsProperties.java

@@ -45,6 +45,9 @@ public class EndpointsProperties {
 	@Valid
 	private Endpoint trace = new Endpoint("/trace");
 
+	@Valid
+	private Endpoint dump = new Endpoint("/dump");
+
 	public Endpoint getVarz() {
 		return this.varz;
 	}
@@ -65,6 +68,10 @@ public class EndpointsProperties {
 		return this.trace;
 	}
 
+	public Endpoint getDump() {
+		return this.dump;
+	}
+
 	public static class Endpoint {
 
 		@NotNull

spring-bootstrap-service/src/main/java/org/springframework/bootstrap/service/trace/TraceEndpoint.java

@@ -16,6 +16,9 @@
 
 package org.springframework.bootstrap.service.trace;
 
+import java.lang.management.ManagementFactory;
+import java.lang.management.ThreadInfo;
+import java.util.Arrays;
 import java.util.List;
 
 import org.springframework.stereotype.Controller;
@@ -44,4 +47,11 @@ public class TraceEndpoint {
 		return this.tracer.traces();
 	}
 
+	@RequestMapping("${endpoints.dump.path:/dump}")
+	@ResponseBody
+	public List<ThreadInfo> dump() {
+		return Arrays.asList(ManagementFactory.getThreadMXBean().dumpAllThreads(true,
+				true));
+	}
+
 }