Move publisher injection to abstract listeners

Push up publisher injection from AuthenticationAuditListener and
AuthorizationAuditListener to the abstract superclasses.

Closes gh-4625

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/security/AbstractAuthenticationAuditListener.java

@@ -17,6 +17,8 @@
 package org.springframework.boot.actuate.security;
 
 import org.springframework.boot.actuate.audit.AuditEvent;
+import org.springframework.boot.actuate.audit.listener.AuditApplicationEvent;
+import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.context.ApplicationEventPublisherAware;
 import org.springframework.context.ApplicationListener;
 import org.springframework.security.authentication.event.AbstractAuthenticationEvent;
@@ -32,4 +34,21 @@ import org.springframework.security.authentication.event.AbstractAuthenticationE
 public abstract class AbstractAuthenticationAuditListener implements
 		ApplicationListener<AbstractAuthenticationEvent>, ApplicationEventPublisherAware {
 
+	private ApplicationEventPublisher publisher;
+
+	@Override
+	public void setApplicationEventPublisher(ApplicationEventPublisher publisher) {
+		this.publisher = publisher;
+	}
+
+	protected ApplicationEventPublisher getPublisher() {
+		return this.publisher;
+	}
+
+	protected void publish(AuditEvent event) {
+		if (getPublisher() != null) {
+			getPublisher().publishEvent(new AuditApplicationEvent(event));
+		}
+	}
+
 }

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/security/AbstractAuthorizationAuditListener.java

@@ -17,6 +17,8 @@
 package org.springframework.boot.actuate.security;
 
 import org.springframework.boot.actuate.audit.AuditEvent;
+import org.springframework.boot.actuate.audit.listener.AuditApplicationEvent;
+import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.context.ApplicationEventPublisherAware;
 import org.springframework.context.ApplicationListener;
 import org.springframework.security.access.event.AbstractAuthorizationEvent;
@@ -32,4 +34,21 @@ import org.springframework.security.access.event.AbstractAuthorizationEvent;
 public abstract class AbstractAuthorizationAuditListener implements
 		ApplicationListener<AbstractAuthorizationEvent>, ApplicationEventPublisherAware {
 
+	private ApplicationEventPublisher publisher;
+
+	@Override
+	public void setApplicationEventPublisher(ApplicationEventPublisher publisher) {
+		this.publisher = publisher;
+	}
+
+	protected ApplicationEventPublisher getPublisher() {
+		return this.publisher;
+	}
+
+	protected void publish(AuditEvent event) {
+		if (getPublisher() != null) {
+			getPublisher().publishEvent(new AuditApplicationEvent(event));
+		}
+	}
+
 }

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/security/AuthenticationAuditListener.java

@@ -20,8 +20,6 @@ import java.util.HashMap;
 import java.util.Map;
 
 import org.springframework.boot.actuate.audit.AuditEvent;
-import org.springframework.boot.actuate.audit.listener.AuditApplicationEvent;
-import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.security.authentication.event.AbstractAuthenticationEvent;
 import org.springframework.security.authentication.event.AbstractAuthenticationFailureEvent;
 import org.springframework.security.authentication.event.AuthenticationSuccessEvent;
@@ -37,15 +35,8 @@ public class AuthenticationAuditListener extends AbstractAuthenticationAuditList
 
 	private static final String WEB_LISTENER_CHECK_CLASS = "org.springframework.security.web.authentication.switchuser.AuthenticationSwitchUserEvent";
 
-	private ApplicationEventPublisher publisher;
-
 	private WebAuditListener webListener = maybeCreateWebListener();
 
-	@Override
-	public void setApplicationEventPublisher(ApplicationEventPublisher publisher) {
-		this.publisher = publisher;
-	}
-
 	private static WebAuditListener maybeCreateWebListener() {
 		if (ClassUtils.isPresent(WEB_LISTENER_CHECK_CLASS, null)) {
 			return new WebAuditListener();
@@ -83,12 +74,6 @@ public class AuthenticationAuditListener extends AbstractAuthenticationAuditList
 				"AUTHENTICATION_SUCCESS", data));
 	}
 
-	private void publish(AuditEvent event) {
-		if (this.publisher != null) {
-			this.publisher.publishEvent(new AuditApplicationEvent(event));
-		}
-	}
-
 	private static class WebAuditListener {
 
 		public void process(AuthenticationAuditListener listener,

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/security/AuthorizationAuditListener.java

@@ -20,26 +20,17 @@ import java.util.HashMap;
 import java.util.Map;
 
 import org.springframework.boot.actuate.audit.AuditEvent;
-import org.springframework.boot.actuate.audit.listener.AuditApplicationEvent;
-import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.security.access.event.AbstractAuthorizationEvent;
 import org.springframework.security.access.event.AuthenticationCredentialsNotFoundEvent;
 import org.springframework.security.access.event.AuthorizationFailureEvent;
 
 /**
- * Default implementation of {@link AuthorizationAuditListener}.
+ * Default implementation of {@link AbstractAuthorizationAuditListener}.
  *
  * @author Dave Syer
  */
 public class AuthorizationAuditListener extends AbstractAuthorizationAuditListener {
 
-	private ApplicationEventPublisher publisher;
-
-	@Override
-	public void setApplicationEventPublisher(ApplicationEventPublisher publisher) {
-		this.publisher = publisher;
-	}
-
 	@Override
 	public void onApplicationEvent(AbstractAuthorizationEvent event) {
 		if (event instanceof AuthenticationCredentialsNotFoundEvent) {
@@ -67,10 +58,4 @@ public class AuthorizationAuditListener extends AbstractAuthorizationAuditListen
 				"AUTHORIZATION_FAILURE", data));
 	}
 
-	private void publish(AuditEvent event) {
-		if (this.publisher != null) {
-			this.publisher.publishEvent(new AuditApplicationEvent(event));
-		}
-	}
-
 }