Harmonize JNDI lookups to enable resourceRef

This commit makes sure that JMS and Mail JNDI lookups behave the same
way as DataSource JNDI lookups by enabling the "resourceRef" flag.

This will make sure to add "java:comp/env" to the lookup if the JNDI
name doesn't already contain it. If that name does not exist, a second
attempt to the original name will be issued automatically.

Closes gh-12803

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jms/JndiConnectionFactoryAutoConfiguration.java

@@ -57,14 +57,17 @@ public class JndiConnectionFactoryAutoConfiguration {
 
 	private final JmsProperties properties;
 
+	private final JndiLocatorDelegate jndiLocatorDelegate;
+
 	public JndiConnectionFactoryAutoConfiguration(JmsProperties properties) {
 		this.properties = properties;
+		this.jndiLocatorDelegate = JndiLocatorDelegate.createDefaultResourceRefLocator();
 	}
 
 	@Bean
 	public ConnectionFactory connectionFactory() throws NamingException {
 		if (StringUtils.hasLength(this.properties.getJndiName())) {
-			return new JndiLocatorDelegate().lookup(this.properties.getJndiName(),
+			return this.jndiLocatorDelegate.lookup(this.properties.getJndiName(),
 					ConnectionFactory.class);
 		}
 		return findJndiConnectionFactory();
@@ -73,7 +76,7 @@ public class JndiConnectionFactoryAutoConfiguration {
 	private ConnectionFactory findJndiConnectionFactory() {
 		for (String name : JNDI_LOCATIONS) {
 			try {
-				return new JndiLocatorDelegate().lookup(name, ConnectionFactory.class);
+				return this.jndiLocatorDelegate.lookup(name, ConnectionFactory.class);
 			}
 			catch (NamingException ex) {
 				// Swallow and continue

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/mail/MailSenderJndiConfiguration.java

@@ -60,7 +60,8 @@ class MailSenderJndiConfiguration {
 	public Session session() {
 		String jndiName = this.properties.getJndiName();
 		try {
-			return new JndiLocatorDelegate().lookup(jndiName, Session.class);
+			return JndiLocatorDelegate.createDefaultResourceRefLocator().lookup(jndiName,
+					Session.class);
 		}
 		catch (NamingException ex) {
 			throw new IllegalStateException(

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jms/JndiConnectionFactoryAutoConfigurationTests.java

@@ -93,7 +93,16 @@ public class JndiConnectionFactoryAutoConfigurationTests {
 
 	@Test
 	public void jndiNamePropertySet() {
-		ConnectionFactory connectionFactory = configureConnectionFactory("myCF");
+		ConnectionFactory connectionFactory = configureConnectionFactory(
+				"java:comp/env/myCF");
+		this.contextRunner.withPropertyValues("spring.jms.jndi-name=java:comp/env/myCF")
+				.run(assertConnectionFactory(connectionFactory));
+	}
+
+	@Test
+	public void jndiNamePropertySetWithResourceRef() {
+		ConnectionFactory connectionFactory = configureConnectionFactory(
+				"java:comp/env/myCF");
 		this.contextRunner.withPropertyValues("spring.jms.jndi-name=myCF")
 				.run(assertConnectionFactory(connectionFactory));
 	}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/mail/MailSenderAutoConfigurationTests.java

@@ -150,8 +150,18 @@ public class MailSenderAutoConfigurationTests {
 
 	@Test
 	public void jndiSessionAvailable() {
-		Session session = configureJndiSession("foo");
-		this.contextRunner.withPropertyValues("spring.mail.jndi-name:foo")
+		Session session = configureJndiSession("java:comp/env/foo");
+		testJndiSessionLookup(session, "java:comp/env/foo");
+	}
+
+	@Test
+	public void jndiSessionAvailableWithResourceRef() {
+		Session session = configureJndiSession("java:comp/env/foo");
+		testJndiSessionLookup(session, "foo");
+	}
+
+	private void testJndiSessionLookup(Session session, String jndiName) {
+		this.contextRunner.withPropertyValues("spring.mail.jndi-name:" + jndiName)
 				.run((context) -> {
 					assertThat(context).hasSingleBean(Session.class);
 					Session sessionBean = context.getBean(Session.class);