explained the lifecycle

kohsuke · kohsuke · commit ebfa6bb04a7d · 2011-12-16T10:48:15.000-08:00
diff --git a/core/src/main/java/hudson/tasks/BuildStep.java b/core/src/main/java/hudson/tasks/BuildStep.java
@@ -62,6 +62,11 @@
  * be null (which is the case when you access the field for the first time
  * the object is restored.)
  *
+ * <h2>Lifecycle</h2>
+ * <p>
+ * Build steps are instantiated when the user saves the job configuration, and sticks
+ * around in memory until the job configuration is overwritten.
+ *
  * @author Kohsuke Kawaguchi
  */
 public interface BuildStep {
diff --git a/core/src/main/java/hudson/tasks/BuildWrapper.java b/core/src/main/java/hudson/tasks/BuildWrapper.java
@@ -52,6 +52,11 @@
  * along with {@link Project}.
  *
  * <p>
+ * {@link BuildWrapper}s are instantiated when the user saves the job configuration, and sticks
+ * around in memory until the job configuration is overwritten.
+ *
+ *
+ * <p>
  * The {@link #setUp(Build,Launcher,BuildListener)} method is invoked for each build.
  *
  * <p>

Original file line number	Diff line number	Diff line change
`@@ -52,6 +52,11 @@`
`52`	`52`	`* along with {@link Project}.`
`53`	`53`	`*`
`54`	`54`	`* <p>`
	`55`	`+ * {@link BuildWrapper}s are instantiated when the user saves the job configuration, and sticks`
	`56`	`+ * around in memory until the job configuration is overwritten.`
	`57`	`+ *`
	`58`	`+ *`
	`59`	`+ * <p>`
`55`	`60`	`* The {@link #setUp(Build,Launcher,BuildListener)} method is invoked for each build.`
`56`	`61`	`*`
`57`	`62`	`* <p>`