Restore outdated local/remote-slsb attributes for declaration compatibility

Legacy EJB attributes are ignored since 6.0 due to being bound to a plain JndiObjectFactoryBean - but can still be declared now, e.g. when validating against the common versions of spring-jee.xsd out there.

Closes gh-31627

spring-context/src/main/java/org/springframework/ejb/config/LocalStatelessSessionBeanDefinitionParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -18,12 +18,13 @@ package org.springframework.ejb.config;
 
 import org.w3c.dom.Element;
 
+import org.springframework.beans.BeanUtils;
 import org.springframework.jndi.JndiObjectFactoryBean;
 
 /**
  * {@link org.springframework.beans.factory.xml.BeanDefinitionParser}
  * implementation for parsing '{@code local-slsb}' tags and
- * creating plain {@link JndiObjectFactoryBean} definitions.
+ * creating plain {@link JndiObjectFactoryBean} definitions on 6.0.
  *
  * @author Rob Harrop
  * @author Juergen Hoeller
@@ -36,4 +37,10 @@ class LocalStatelessSessionBeanDefinitionParser extends AbstractJndiLocatingBean
 		return JndiObjectFactoryBean.class;
 	}
 
+	@Override
+	protected boolean isEligibleAttribute(String attributeName) {
+		return (super.isEligibleAttribute(attributeName) &&
+				BeanUtils.getPropertyDescriptor(JndiObjectFactoryBean.class, extractPropertyName(attributeName)) != null);
+	}
+
 }

spring-context/src/main/java/org/springframework/ejb/config/RemoteStatelessSessionBeanDefinitionParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -18,12 +18,13 @@ package org.springframework.ejb.config;
 
 import org.w3c.dom.Element;
 
+import org.springframework.beans.BeanUtils;
 import org.springframework.jndi.JndiObjectFactoryBean;
 
 /**
  * {@link org.springframework.beans.factory.xml.BeanDefinitionParser}
  * implementation for parsing '{@code remote-slsb}' tags and
- * creating plain {@link JndiObjectFactoryBean} definitions.
+ * creating plain {@link JndiObjectFactoryBean} definitions as of 6.0.
  *
  * @author Rob Harrop
  * @author Juergen Hoeller
@@ -36,4 +37,10 @@ class RemoteStatelessSessionBeanDefinitionParser extends AbstractJndiLocatingBea
 		return JndiObjectFactoryBean.class;
 	}
 
+	@Override
+	protected boolean isEligibleAttribute(String attributeName) {
+		return (super.isEligibleAttribute(attributeName) &&
+				BeanUtils.getPropertyDescriptor(JndiObjectFactoryBean.class, extractPropertyName(attributeName)) != null);
+	}
+
 }

spring-context/src/main/resources/org/springframework/ejb/config/spring-jee.xsd

@@ -95,7 +95,7 @@
 		</xsd:complexType>
 	</xsd:element>
 
-	<xsd:element name="local-slsb" type="jndiLocatingType">
+	<xsd:element name="local-slsb" type="ejbType">
 		<xsd:annotation>
 			<xsd:documentation source="java:org.springframework.jndi.JndiObjectFactoryBean"><![CDATA[
 	Exposes a reference to a local EJB Stateless SessionBean.
@@ -103,15 +103,56 @@
 		</xsd:annotation>
 	</xsd:element>
 
-	<xsd:element name="remote-slsb" type="jndiLocatingType">
+	<xsd:element name="remote-slsb">
 		<xsd:annotation>
 			<xsd:documentation source="java:org.springframework.jndi.JndiObjectFactoryBean"><![CDATA[
 	Exposes a reference to a remote EJB Stateless SessionBean.
 			]]></xsd:documentation>
 		</xsd:annotation>
+		<xsd:complexType>
+			<xsd:complexContent>
+				<xsd:extension base="ejbType">
+					<xsd:attribute name="home-interface" type="xsd:string">
+						<xsd:annotation>
+							<xsd:documentation source="java:java.lang.Class"><![CDATA[
+	The home interface that will be narrowed to before performing the
+	parameterless SLSB create() call that returns the actual SLSB proxy.
+	NOTE: Effectively ignored as of 6.0 in favor of plain JNDI lookups.
+							]]></xsd:documentation>
+						</xsd:annotation>
+					</xsd:attribute>
+					<xsd:attribute name="refresh-home-on-connect-failure" type="xsd:boolean" default="false">
+						<xsd:annotation>
+							<xsd:documentation><![CDATA[
+	Controls whether to refresh the EJB home on connect failure.
+	NOTE: Effectively ignored as of 6.0 in favor of plain JNDI lookups.
+
+	Can be turned on to allow for hot restart of the EJB server.
+	If a cached EJB home throws an RMI exception that indicates a
+	remote connect failure, a fresh home will be fetched and the
+	invocation will be retried.
+							]]></xsd:documentation>
+						</xsd:annotation>
+					</xsd:attribute>
+					<xsd:attribute name="cache-session-bean" type="xsd:boolean" default="false">
+						<xsd:annotation>
+							<xsd:documentation><![CDATA[
+	Controls whether to cache the actual session bean object.
+	NOTE: Effectively ignored as of 6.0 in favor of plain JNDI lookups.
+
+	Off by default for standard EJB compliance. Turn this flag
+	on to optimize session bean access for servers that are
+	known to allow for caching the actual session bean object.
+							]]></xsd:documentation>
+						</xsd:annotation>
+					</xsd:attribute>
+				</xsd:extension>
+			</xsd:complexContent>
+		</xsd:complexType>
 	</xsd:element>
 
-	<xsd:complexType name="jndiLocatingType">
+	<!-- base types -->
+	<xsd:complexType name="jndiLocatingType" abstract="true">
 		<xsd:complexContent>
 			<xsd:extension base="beans:identifiedType">
 				<xsd:sequence>
@@ -183,6 +224,40 @@
 		</xsd:complexContent>
 	</xsd:complexType>
 
+	<xsd:complexType name="ejbType">
+		<xsd:complexContent>
+			<xsd:extension base="jndiLocatingType">
+				<xsd:attribute name="lookup-home-on-startup" type="xsd:boolean" default="true">
+					<xsd:annotation>
+						<xsd:documentation><![CDATA[
+	Controls whether the lookup of the EJB home object is performed
+	immediately on startup (if true, the default), or on first access
+	(if false).
+	NOTE: Effectively ignored as of 6.0 in favor of plain JNDI lookups.
+						]]></xsd:documentation>
+					</xsd:annotation>
+				</xsd:attribute>
+				<xsd:attribute name="cache-home" type="xsd:boolean" default="true">
+					<xsd:annotation>
+						<xsd:documentation><![CDATA[
+	Controls whether the EJB home object is cached once it has been located.
+	On by default; turn this flag off to always reobtain fresh home objects.
+	NOTE: Effectively ignored as of 6.0 in favor of plain JNDI lookups.
+						]]></xsd:documentation>
+					</xsd:annotation>
+				</xsd:attribute>
+				<xsd:attribute name="business-interface" type="xsd:string">
+					<xsd:annotation>
+						<xsd:documentation source="java:java.lang.Class"><![CDATA[
+	The business interface of the EJB being proxied.
+	NOTE: Effectively ignored as of 6.0 in favor of plain JNDI lookups.
+						]]></xsd:documentation>
+					</xsd:annotation>
+				</xsd:attribute>
+			</xsd:extension>
+		</xsd:complexContent>
+	</xsd:complexType>
+
 	<xsd:simpleType name="environmentRefType">
 		<xsd:annotation>
 			<xsd:appinfo>

spring-context/src/test/java/org/springframework/ejb/config/JeeNamespaceHandlerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -16,9 +16,12 @@
 
 package org.springframework.ejb.config;
 
+import javax.naming.NoInitialContextException;
+
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
+import org.springframework.beans.factory.BeanCreationException;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.beans.factory.config.RuntimeBeanReference;
@@ -29,6 +32,7 @@ import org.springframework.core.io.ClassPathResource;
 import org.springframework.jndi.JndiObjectFactoryBean;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 
 /**
  * @author Rob Harrop
@@ -93,6 +97,10 @@ public class JeeNamespaceHandlerTests {
 		BeanDefinition beanDefinition = this.beanFactory.getMergedBeanDefinition("simpleLocalEjb");
 		assertThat(beanDefinition.getBeanClassName()).isEqualTo(JndiObjectFactoryBean.class.getName());
 		assertPropertyValue(beanDefinition, "jndiName", "ejb/MyLocalBean");
+
+		assertThatExceptionOfType(BeanCreationException.class)
+				.isThrownBy(() -> this.beanFactory.getBean("simpleLocalEjb"))
+				.withCauseInstanceOf(NoInitialContextException.class);
 	}
 
 	@Test
@@ -100,6 +108,32 @@ public class JeeNamespaceHandlerTests {
 		BeanDefinition beanDefinition = this.beanFactory.getMergedBeanDefinition("simpleRemoteEjb");
 		assertThat(beanDefinition.getBeanClassName()).isEqualTo(JndiObjectFactoryBean.class.getName());
 		assertPropertyValue(beanDefinition, "jndiName", "ejb/MyRemoteBean");
+
+		assertThatExceptionOfType(BeanCreationException.class)
+				.isThrownBy(() -> this.beanFactory.getBean("simpleRemoteEjb"))
+				.withCauseInstanceOf(NoInitialContextException.class);
+	}
+
+	@Test
+	public void testComplexLocalSlsb() {
+		BeanDefinition beanDefinition = this.beanFactory.getMergedBeanDefinition("complexLocalEjb");
+		assertThat(beanDefinition.getBeanClassName()).isEqualTo(JndiObjectFactoryBean.class.getName());
+		assertPropertyValue(beanDefinition, "jndiName", "ejb/MyLocalBean");
+
+		assertThatExceptionOfType(BeanCreationException.class)
+				.isThrownBy(() -> this.beanFactory.getBean("complexLocalEjb"))
+				.withCauseInstanceOf(NoInitialContextException.class);
+	}
+
+	@Test
+	public void testComplexRemoteSlsb() {
+		BeanDefinition beanDefinition = this.beanFactory.getMergedBeanDefinition("complexRemoteEjb");
+		assertThat(beanDefinition.getBeanClassName()).isEqualTo(JndiObjectFactoryBean.class.getName());
+		assertPropertyValue(beanDefinition, "jndiName", "ejb/MyRemoteBean");
+
+		assertThatExceptionOfType(BeanCreationException.class)
+				.isThrownBy(() -> this.beanFactory.getBean("complexRemoteEjb"))
+				.withCauseInstanceOf(NoInitialContextException.class);
 	}
 
 	@Test

spring-context/src/test/resources/org/springframework/ejb/config/jeeNamespaceHandlerTests.xml

@@ -40,14 +40,41 @@
 	</util:properties>
 
 	<!-- Local EJB Tests -->
-	<jee:local-slsb id="simpleLocalEjb" jndi-name="ejb/MyLocalBean"/>
+	<jee:local-slsb id="simpleLocalEjb" jndi-name="ejb/MyLocalBean"
+			business-interface="org.springframework.beans.testfixture.beans.ITestBean"/>
+
+	<jee:local-slsb id="complexLocalEjb"
+			jndi-name="ejb/MyLocalBean"
+			business-interface="org.springframework.beans.testfixture.beans.ITestBean"
+			cache-home="true"
+			lookup-home-on-startup="true"
+			resource-ref="true">
+		<jee:environment>foo=bar</jee:environment>
+	</jee:local-slsb>
 
 	<!-- Remote EJB Tests -->
-	<jee:remote-slsb id="simpleRemoteEjb" jndi-name="ejb/MyRemoteBean"/>
+	<jee:remote-slsb id="simpleRemoteEjb" jndi-name="ejb/MyRemoteBean"
+			business-interface="org.springframework.beans.testfixture.beans.ITestBean"/>
 
-	<!-- Lazy beans Tests-->
+	<jee:remote-slsb id="complexRemoteEjb"
+			jndi-name="ejb/MyRemoteBean"
+			business-interface="org.springframework.beans.testfixture.beans.ITestBean"
+			cache-home="true"
+			lookup-home-on-startup="true"
+			resource-ref="true"
+			home-interface="org.springframework.beans.testfixture.beans.ITestBean"
+			refresh-home-on-connect-failure="true"
+      		cache-session-bean="true">
+		<jee:environment>foo=bar</jee:environment>
+	</jee:remote-slsb>
+
+	<!-- Lazy Lookup Tests-->
 	<jee:jndi-lookup id="lazyDataSource" jndi-name="jdbc/MyDataSource" lazy-init="true"/>
-	<jee:local-slsb id="lazyLocalBean" jndi-name="ejb/MyLocalBean" lazy-init="true"/>
-	<jee:remote-slsb id="lazyRemoteBean" jndi-name="ejb/MyRemoteBean" lazy-init="true"/>
+
+	<jee:local-slsb id="lazyLocalBean" jndi-name="ejb/MyLocalBean"
+			business-interface="org.springframework.beans.testfixture.beans.ITestBean" lazy-init="true"/>
+
+	<jee:remote-slsb id="lazyRemoteBean" jndi-name="ejb/MyRemoteBean"
+			business-interface="org.springframework.beans.testfixture.beans.ITestBean" lazy-init="true"/>
 
 </beans>