Minimize and centralize assumptions about build output

Closes gh-15471

spring-boot-samples/spring-boot-sample-parent-context/src/main/java/sample/parent/SampleParentContextApplication.java

@@ -16,7 +16,6 @@
 
 package sample.parent;
 
-import java.io.File;
 import java.util.function.Consumer;
 
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -33,7 +32,6 @@ import org.springframework.integration.file.FileReadingMessageSource;
 import org.springframework.integration.file.FileWritingMessageHandler;
 
 @SpringBootApplication
-@EnableConfigurationProperties(ServiceProperties.class)
 public class SampleParentContextApplication {
 
 	public static void main(String[] args) throws Exception {
@@ -42,12 +40,19 @@ public class SampleParentContextApplication {
 	}
 
 	@EnableAutoConfiguration
+	@EnableConfigurationProperties(ServiceProperties.class)
 	protected static class Parent {
 
+		private final ServiceProperties serviceProperties;
+
+		public Parent(ServiceProperties serviceProperties) {
+			this.serviceProperties = serviceProperties;
+		}
+
 		@Bean
 		public FileReadingMessageSource fileReader() {
 			FileReadingMessageSource reader = new FileReadingMessageSource();
-			reader.setDirectory(new File("target/input"));
+			reader.setDirectory(this.serviceProperties.getInputDir());
 			return reader;
 		}
 
@@ -64,7 +69,7 @@ public class SampleParentContextApplication {
 		@Bean
 		public FileWritingMessageHandler fileWriter() {
 			FileWritingMessageHandler writer = new FileWritingMessageHandler(
-					new File("target/output"));
+					this.serviceProperties.getOutputDir());
 			writer.setExpectReply(false);
 			return writer;
 		}

spring-boot-samples/spring-boot-sample-parent-context/src/main/java/sample/parent/ServiceProperties.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2014 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -16,6 +16,8 @@
 
 package sample.parent;
 
+import java.io.File;
+
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.jmx.export.annotation.ManagedAttribute;
 import org.springframework.jmx.export.annotation.ManagedResource;
@@ -26,6 +28,10 @@ public class ServiceProperties {
 
 	private String greeting = "Hello";
 
+	private File inputDir;
+
+	private File outputDir;
+
 	@ManagedAttribute
 	public String getGreeting() {
 		return this.greeting;
@@ -35,4 +41,20 @@ public class ServiceProperties {
 		this.greeting = greeting;
 	}
 
+	public File getInputDir() {
+		return this.inputDir;
+	}
+
+	public void setInputDir(File inputDir) {
+		this.inputDir = inputDir;
+	}
+
+	public File getOutputDir() {
+		return this.outputDir;
+	}
+
+	public void setOutputDir(File outputDir) {
+		this.outputDir = outputDir;
+	}
+
 }

spring-boot-samples/spring-boot-sample-parent-context/src/main/resources/application.properties

@@ -1 +1,3 @@
 service.greeting=Hello
+service.input-dir=input
+service.output-dir=output