INT-1675: work a bit harder to expose existing handlers if they are @ManagedResources

spring-integration-core/src/main/java/org/springframework/integration/handler/LoggingHandler.java

@@ -66,7 +66,7 @@ public class LoggingHandler extends AbstractMessageHandler {
 		this.evaluationContext = evaluationContext;
 		this.expression = EXPRESSION_PARSER.parseExpression("payload");
 	}
-
+	
 	public void setExpression(String expressionString) {
 		this.expression = EXPRESSION_PARSER.parseExpression(expressionString);
 	}

spring-integration-core/src/main/java/org/springframework/integration/history/TrackableComponent.java

@@ -17,13 +17,17 @@
 package org.springframework.integration.history;
 
 import org.springframework.integration.context.NamedComponent;
+import org.springframework.jmx.export.annotation.ManagedOperation;
+import org.springframework.jmx.export.annotation.ManagedResource;
 
 /**
  * @author Mark Fisher
  * @since 2.0
  */
+@ManagedResource
 public interface TrackableComponent extends NamedComponent {
 
+	@ManagedOperation
 	void setShouldTrack(boolean shouldTrack);
 
 }

spring-integration-core/src/main/java/org/springframework/integration/router/ExpressionEvaluatingRouter.java

@@ -32,5 +32,5 @@ public class ExpressionEvaluatingRouter extends AbstractMessageProcessingRouter
 	public ExpressionEvaluatingRouter(Expression expression) {
 		super(new ExpressionEvaluatingMessageProcessor<Object>(expression));
 	}
-
+	
 }