Merge pull request #4356 from bohrqiu/master

* pr/4356:
  Polish contribution
  Add thread total started count to SystemPublicMetrics

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/SystemPublicMetrics.java

@@ -119,6 +119,8 @@ public class SystemPublicMetrics implements PublicMetrics, Ordered {
 				(long) threadMxBean.getPeakThreadCount()));
 		result.add(new Metric<Long>("threads.daemon",
 				(long) threadMxBean.getDaemonThreadCount()));
+		result.add(new Metric<Long>("threads.totalStarted",
+				threadMxBean.getTotalStartedThreadCount()));
 		result.add(new Metric<Long>("threads", (long) threadMxBean.getThreadCount()));
 	}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/SystemPublicMetricsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -52,6 +52,7 @@ public class SystemPublicMetricsTests {
 
 		assertTrue(results.containsKey("threads.peak"));
 		assertTrue(results.containsKey("threads.daemon"));
+		assertTrue(results.containsKey("threads.totalStarted"));
 		assertTrue(results.containsKey("threads"));
 
 		assertTrue(results.containsKey("classes.loaded"));

spring-boot-docs/src/main/asciidoc/production-ready-features.adoc

@@ -914,6 +914,7 @@ endpoint you should see a response similar to this:
 		"threads": 15,
 		"threads.daemon": 11,
 		"threads.peak": 15,
+		"threads.totalStarted": 42,
 		"uptime": 494836,
 		"instance.uptime": 489782,
 		"datasource.primary.active": 5,