Add constants for well-known PropertySource names

Closes gh-4776

spring-boot/src/main/java/org/springframework/boot/context/config/ConfigFileApplicationListener.java

@@ -131,6 +131,11 @@ public class ConfigFileApplicationListener implements EnvironmentPostProcessor,
 	 */
 	public static final int DEFAULT_ORDER = Ordered.HIGHEST_PRECEDENCE + 10;
 
+	/**
+	 * Name of the application configuration {@link PropertySource}.
+	 */
+	public static final String APPLICATION_CONFIGURATION_PROPERTY_SOURCE_NAME = "applicationConfigurationProperties";
+
 	private final DeferredLog logger = new DeferredLog();
 
 	private String searchLocations;
@@ -599,14 +604,14 @@ public class ConfigFileApplicationListener implements EnvironmentPostProcessor,
 	static class ConfigurationPropertySources
 			extends EnumerablePropertySource<Collection<PropertySource<?>>> {
 
-		private static final String NAME = "applicationConfigurationProperties";
+
 
 		private final Collection<PropertySource<?>> sources;
 
 		private final String[] names;
 
 		ConfigurationPropertySources(Collection<PropertySource<?>> sources) {
-			super(NAME, sources);
+			super(APPLICATION_CONFIGURATION_PROPERTY_SOURCE_NAME, sources);
 			this.sources = sources;
 			List<String> names = new ArrayList<String>();
 			for (PropertySource<?> source : sources) {
@@ -630,9 +635,9 @@ public class ConfigFileApplicationListener implements EnvironmentPostProcessor,
 		}
 
 		public static void finishAndRelocate(MutablePropertySources propertySources) {
+			String name = APPLICATION_CONFIGURATION_PROPERTY_SOURCE_NAME;
 			ConfigurationPropertySources removed = (ConfigurationPropertySources) propertySources
-					.get(ConfigurationPropertySources.NAME);
-			String name = ConfigurationPropertySources.NAME;
+					.get(name);
 			if (removed != null) {
 				for (PropertySource<?> propertySource : removed.sources) {
 					if (propertySource instanceof EnumerableCompositePropertySource) {
@@ -646,7 +651,7 @@ public class ConfigFileApplicationListener implements EnvironmentPostProcessor,
 						propertySources.addAfter(name, propertySource);
 					}
 				}
-				propertySources.remove(ConfigurationPropertySources.NAME);
+				propertySources.remove(APPLICATION_CONFIGURATION_PROPERTY_SOURCE_NAME);
 			}
 		}
 

spring-boot/src/main/java/org/springframework/boot/context/config/RandomValuePropertySource.java

@@ -51,6 +51,11 @@ import org.springframework.util.StringUtils;
  */
 public class RandomValuePropertySource extends PropertySource<Random> {
 
+	/**
+	 * Name of the random {@link PropertySource}.
+	 */
+	public static final String RANDOM_PROPERTY_SOURCE_NAME = "random";
+
 	private static final String PREFIX = "random.";
 
 	private static Log logger = LogFactory.getLog(RandomValuePropertySource.class);
@@ -59,6 +64,10 @@ public class RandomValuePropertySource extends PropertySource<Random> {
 		super(name, new Random());
 	}
 
+	public RandomValuePropertySource() {
+		this(RANDOM_PROPERTY_SOURCE_NAME);
+	}
+
 	@Override
 	public Object getProperty(String name) {
 		if (!name.startsWith(PREFIX)) {
@@ -126,7 +135,7 @@ public class RandomValuePropertySource extends PropertySource<Random> {
 	public static void addToEnvironment(ConfigurableEnvironment environment) {
 		environment.getPropertySources().addAfter(
 				StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME,
-				new RandomValuePropertySource("random"));
+				new RandomValuePropertySource(RANDOM_PROPERTY_SOURCE_NAME));
 		logger.trace("RandomValuePropertySource add to Environment");
 	}
 

spring-boot/src/test/java/org/springframework/boot/bind/PropertiesConfigurationFactoryTests.java

 /*
- * Copyright 2012-2013 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.
@@ -126,7 +126,7 @@ public class PropertiesConfigurationFactoryTests {
 		MutablePropertySources propertySources = new MutablePropertySources();
 		propertySources.addLast(new SystemEnvironmentPropertySource("systemEnvironment",
 				Collections.<String, Object>singletonMap("FOO_BAR_NAME", "blah")));
-		propertySources.addLast(new RandomValuePropertySource("random"));
+		propertySources.addLast(new RandomValuePropertySource());
 		setupFactory();
 		this.factory.setPropertySources(propertySources);
 		this.factory.afterPropertiesSet();

spring-boot/src/test/java/org/springframework/boot/context/config/ConfigFileApplicationListenerTests.java

@@ -519,7 +519,8 @@ public class ConfigFileApplicationListenerTests {
 		assertThat(Arrays.asList(this.environment.getActiveProfiles()), contains("dev"));
 		assertThat(property, equalTo("fromdevprofile"));
 		ConfigurationPropertySources propertySource = (ConfigurationPropertySources) this.environment
-				.getPropertySources().get("applicationConfigurationProperties");
+				.getPropertySources()
+				.get(ConfigFileApplicationListener.APPLICATION_CONFIGURATION_PROPERTY_SOURCE_NAME);
 		Collection<org.springframework.core.env.PropertySource<?>> sources = propertySource
 				.getSource();
 		assertEquals(2, sources.size());

spring-boot/src/test/java/org/springframework/boot/context/config/RandomValuePropertySourceTests.java

@@ -33,7 +33,7 @@ import static org.junit.Assert.assertTrue;
  */
 public class RandomValuePropertySourceTests {
 
-	private RandomValuePropertySource source = new RandomValuePropertySource("random");
+	private RandomValuePropertySource source = new RandomValuePropertySource();
 
 	@Test
 	public void notRandom() {