Register JndiPropertySource by default in servlet environments

Prior to this change, StandardServletEnvironment evaluated a
"jndiPropertySourceEnabled" flag to determine whether or not to add a
JndiPropertySource.  Following the changes introduced in SPR-8490, there
is now no reason not to enable a JNDI property source by default. This
change eliminates the support for "jndiPropertySourceEnabled" and adds
a JndiPropertySource automatically.

Issue: SPR-8545, SPR-8490

org.springframework.context/src/main/java/org/springframework/jndi/JndiPropertySource.java

@@ -35,14 +35,12 @@ import org.springframework.core.env.PropertySource;
  * be specified using {@link JndiLocatorDelegate#setJndiEnvironment(java.util.Properties)}
  * prior to construction of the {@code JndiPropertySource}.
  *
- * <p>{@link org.springframework.web.context.support.StandardServletEnvironment
- * StandardServletEnvironment} allows for declaratively including a
- * {@code JndiPropertySource} through its support for a {@link
- * org.springframework.web.context.support.StandardServletEnvironment#JNDI_PROPERTY_SOURCE_ENABLED
- * JNDI_PROPERTY_SOURCE_ENABLED} context-param, but any customization of the underlying
- * {@link JndiLocatorDelegate} will typically be done within an {@link
- * org.springframework.context.ApplicationContextInitializer ApplicationContextInitializer}
- * or {@link org.springframework.web.WebApplicationInitializer WebApplicationInitializer}.
+ * <p>Note that {@link org.springframework.web.context.support.StandardServletEnvironment
+ * StandardServletEnvironment} includes a {@code JndiPropertySource} by default, and any
+ * customization of the underlying {@link JndiLocatorDelegate} may be performed within an
+ * {@link org.springframework.context.ApplicationContextInitializer
+ * ApplicationContextInitializer} or {@link org.springframework.web.WebApplicationInitializer
+ * WebApplicationInitializer}.
  *
  * @author Chris Beams
  * @author Juergen Hoeller
@@ -54,18 +52,6 @@ import org.springframework.core.env.PropertySource;
  */
 public class JndiPropertySource extends PropertySource<JndiLocatorDelegate> {
 
-	/** JNDI context property source name: {@value} */
-	public static final String JNDI_PROPERTY_SOURCE_NAME = "jndiPropertySource";
-
-	/**
-	 * Create a new {@code JndiPropertySource} with the default name
-	 * {@value #JNDI_PROPERTY_SOURCE_NAME} and a {@link JndiLocatorDelegate} configured
-	 * to prefix any names with "java:comp/env/".
-	 */
-	public JndiPropertySource() {
-		this(JNDI_PROPERTY_SOURCE_NAME);
-	}
-
 	/**
 	 * Create a new {@code JndiPropertySource} with the given name
 	 * and a {@link JndiLocatorDelegate} configured to prefix any names with
@@ -75,14 +61,6 @@ public class JndiPropertySource extends PropertySource<JndiLocatorDelegate> {
 		this(name, createDefaultJndiLocator());
 	}
 
-	/**
-	 * Create a new {@code JndiPropertySource} with the default name
-	 * {@value #JNDI_PROPERTY_SOURCE_NAME} and the given {@code JndiLocatorDelegate}.
-	 */
-	public JndiPropertySource(JndiLocatorDelegate jndiLocator) {
-		this(JNDI_PROPERTY_SOURCE_NAME, jndiLocator);
-	}
-
 	/**
 	 * Create a new {@code JndiPropertySource} with the given name and the given
 	 * {@code JndiLocatorDelegate}.

org.springframework.context/src/test/java/org/springframework/jndi/JndiPropertySourceTests.java

@@ -36,7 +36,7 @@ public class JndiPropertySourceTests {
 
 	@Test
 	public void nonExistentProperty() {
-		JndiPropertySource ps = new JndiPropertySource();
+		JndiPropertySource ps = new JndiPropertySource("jndiProperties");
 		assertThat(ps.getProperty("bogus"), nullValue());
 	}
 
@@ -55,7 +55,7 @@ public class JndiPropertySourceTests {
 		jndiLocator.setResourceRef(true);
 		jndiLocator.setJndiTemplate(jndiTemplate);
 
-		JndiPropertySource ps = new JndiPropertySource(jndiLocator);
+		JndiPropertySource ps = new JndiPropertySource("jndiProperties", jndiLocator);
 		assertThat((String)ps.getProperty("p1"), equalTo("v1"));
 	}
 
@@ -74,7 +74,7 @@ public class JndiPropertySourceTests {
 		jndiLocator.setResourceRef(true);
 		jndiLocator.setJndiTemplate(jndiTemplate);
 
-		JndiPropertySource ps = new JndiPropertySource(jndiLocator);
+		JndiPropertySource ps = new JndiPropertySource("jndiProperties", jndiLocator);
 		assertThat((String)ps.getProperty("p1"), equalTo("v1"));
 	}
 

org.springframework.web/src/main/java/org/springframework/web/context/support/StandardServletEnvironment.java

@@ -19,12 +19,11 @@ package org.springframework.web.context.support;
 import javax.servlet.ServletConfig;
 import javax.servlet.ServletContext;
 
-import org.springframework.core.env.StandardEnvironment;
 import org.springframework.core.env.Environment;
 import org.springframework.core.env.MutablePropertySources;
 import org.springframework.core.env.PropertySource;
 import org.springframework.core.env.PropertySource.StubPropertySource;
-import org.springframework.core.env.PropertySources;
+import org.springframework.core.env.StandardEnvironment;
 import org.springframework.jndi.JndiPropertySource;
 
 /**
@@ -32,20 +31,13 @@ import org.springframework.jndi.JndiPropertySource;
  * applications. All web-related (servlet-based) {@code ApplicationContext} classes
  * initialize an instance by default.
  *
- * <p>Contributes {@code ServletConfig}- and {@code ServletContext}-based
- * {@link PropertySource} instances. See the {@link #customizePropertySources} method
- * for details.
- *
- * <p>After initial bootstrapping, property sources will be searched for the presence of a
- * "jndiPropertySourceEnabled" property; if found, a {@link JndiPropertySource} will be
- * added to this environment's {@link PropertySources}, with precedence higher than system
- * properties and environment variables, but lower than that of ServletContext and
- * ServletConfig init params.
+ * <p>Contributes {@code ServletConfig}, {@code ServletContext}, and JNDI-based
+ * {@link PropertySource} instances. See {@link #customizePropertySources} method
+ * documentation for details.
  *
  * @author Chris Beams
  * @since 3.1
  * @see StandardEnvironment
- * @see StandardPortletEnvironment
  */
 public class StandardServletEnvironment extends StandardEnvironment {
 
@@ -55,11 +47,8 @@ public class StandardServletEnvironment extends StandardEnvironment {
 	/** Servlet config init parameters property source name: {@value} */
 	public static final String SERVLET_CONFIG_PROPERTY_SOURCE_NAME = "servletConfigInitParams";
 
-	/**
-	 * Name of property used to determine if a {@link JndiPropertySource}
-	 * should be registered by default: {@value}
-	 */
-	public static final String JNDI_PROPERTY_SOURCE_ENABLED_FLAG = "jndiPropertySourceEnabled";
+	/** JNDI property source name: {@value} */
+	public static final String JNDI_PROPERTY_SOURCE_NAME = "jndiProperties";
 
 
 	/**
@@ -68,21 +57,18 @@ public class StandardServletEnvironment extends StandardEnvironment {
 	 * <ul>
 	 * <li>{@value #SERVLET_CONFIG_PROPERTY_SOURCE_NAME}
 	 * <li>{@value #SERVLET_CONTEXT_PROPERTY_SOURCE_NAME}
-	 * <li>(optionally) {@link JndiPropertySource#JNDI_PROPERTY_SOURCE_NAME "jndiPropertySource"}
+	 * <li>{@value #JNDI_PROPERTY_SOURCE_NAME}
 	 * </ul>
 	 * <p>Properties present in {@value #SERVLET_CONFIG_PROPERTY_SOURCE_NAME} will
-	 * take precedence over those in {@value #SERVLET_CONTEXT_PROPERTY_SOURCE_NAME}.
+	 * take precedence over those in {@value #SERVLET_CONTEXT_PROPERTY_SOURCE_NAME}, and
+	 * properties found in either of the above take precedence over those found in
+	 * {@value #JNDI_PROPERTY_SOURCE_NAME}.
 	 * <p>Properties in any of the above will take precedence over system properties and
 	 * environment variables contributed by the {@link StandardEnvironment} superclass.
 	 * <p>The {@code Servlet}-related property sources are added as stubs for now, and
 	 * will be {@linkplain WebApplicationContextUtils#initServletPropertySources fully
 	 * initialized} once the actual {@link ServletConfig} and {@link ServletContext}
 	 * objects are available.
-	 * <p>If the {@link JndiPropertySource#JNDI_PROPERTY_SOURCE_ENABLED_FLAG "jndiPropertySourceEnabled"}
-	 * property is present in any of the default property sources, a
-	 * {@link JndiPropertySource} will be added as well, with precedence lower than
-	 * servlet property sources, but higher than system properties and environment
-	 * variables.
 	 * @see StandardEnvironment#customizePropertySources
 	 * @see org.springframework.core.env.AbstractEnvironment#customizePropertySources
 	 * @see ServletConfigPropertySource
@@ -95,10 +81,7 @@ public class StandardServletEnvironment extends StandardEnvironment {
 	protected void customizePropertySources(MutablePropertySources propertySources) {
 		propertySources.addLast(new StubPropertySource(SERVLET_CONFIG_PROPERTY_SOURCE_NAME));
 		propertySources.addLast(new StubPropertySource(SERVLET_CONTEXT_PROPERTY_SOURCE_NAME));
+		propertySources.addLast(new JndiPropertySource(JNDI_PROPERTY_SOURCE_NAME));
 		super.customizePropertySources(propertySources);
-
-		if (this.getProperty(JNDI_PROPERTY_SOURCE_ENABLED_FLAG, boolean.class, false)) {
-			propertySources.addAfter(SERVLET_CONTEXT_PROPERTY_SOURCE_NAME, new JndiPropertySource());
-		}
 	}
 }

org.springframework.web/src/test/java/org/springframework/web/context/support/StandardServletEnvironmentTests.java

@@ -19,14 +19,12 @@ package org.springframework.web.context.support;
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;
-import static org.springframework.web.context.support.StandardServletEnvironment.JNDI_PROPERTY_SOURCE_ENABLED_FLAG;
 
 import org.junit.Test;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.StandardEnvironment;
 import org.springframework.core.env.MutablePropertySources;
 import org.springframework.core.env.PropertySource;
-import org.springframework.jndi.JndiPropertySource;
 
 /**
  * Unit tests for {@link StandardServletEnvironment}.
@@ -40,42 +38,13 @@ public class StandardServletEnvironmentTests {
 	public void propertySourceOrder() {
 		ConfigurableEnvironment env = new StandardServletEnvironment();
 		MutablePropertySources sources = env.getPropertySources();
-		assertThat(sources.precedenceOf(PropertySource.named(StandardServletEnvironment.SERVLET_CONFIG_PROPERTY_SOURCE_NAME)), equalTo(0));
-		assertThat(sources.precedenceOf(PropertySource.named(StandardServletEnvironment.SERVLET_CONTEXT_PROPERTY_SOURCE_NAME)), equalTo(1));
-		assertThat(sources.precedenceOf(PropertySource.named(StandardEnvironment.SYSTEM_PROPERTIES_PROPERTY_SOURCE_NAME)), equalTo(2));
-		assertThat(sources.precedenceOf(PropertySource.named(StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME)), equalTo(3));
-		assertThat(sources.size(), is(4));
-	}
-
-	@Test
-	public void propertySourceOrder_jndiPropertySourceEnabled() {
-		System.setProperty(JNDI_PROPERTY_SOURCE_ENABLED_FLAG, "true");
-		ConfigurableEnvironment env = new StandardServletEnvironment();
-		MutablePropertySources sources = env.getPropertySources();
 
 		assertThat(sources.precedenceOf(PropertySource.named(StandardServletEnvironment.SERVLET_CONFIG_PROPERTY_SOURCE_NAME)), equalTo(0));
 		assertThat(sources.precedenceOf(PropertySource.named(StandardServletEnvironment.SERVLET_CONTEXT_PROPERTY_SOURCE_NAME)), equalTo(1));
-		assertThat(sources.precedenceOf(PropertySource.named(JndiPropertySource.JNDI_PROPERTY_SOURCE_NAME)), equalTo(2));
+		assertThat(sources.precedenceOf(PropertySource.named(StandardServletEnvironment.JNDI_PROPERTY_SOURCE_NAME)), equalTo(2));
 		assertThat(sources.precedenceOf(PropertySource.named(StandardEnvironment.SYSTEM_PROPERTIES_PROPERTY_SOURCE_NAME)), equalTo(3));
 		assertThat(sources.precedenceOf(PropertySource.named(StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME)), equalTo(4));
 		assertThat(sources.size(), is(5));
-
-		System.clearProperty(JNDI_PROPERTY_SOURCE_ENABLED_FLAG);
 	}
 
-	@Test
-	public void propertySourceOrder_jndiPropertySourceEnabledIsFalse() {
-		System.setProperty(JNDI_PROPERTY_SOURCE_ENABLED_FLAG, "false");
-		ConfigurableEnvironment env = new StandardServletEnvironment();
-		MutablePropertySources sources = env.getPropertySources();
-
-		assertThat(sources.precedenceOf(PropertySource.named(StandardServletEnvironment.SERVLET_CONFIG_PROPERTY_SOURCE_NAME)), equalTo(0));
-		assertThat(sources.precedenceOf(PropertySource.named(StandardServletEnvironment.SERVLET_CONTEXT_PROPERTY_SOURCE_NAME)), equalTo(1));
-		//assertThat(sources.precedenceOf(PropertySource.named(JndiPropertySource.JNDI_PROPERTY_SOURCE_NAME)), equalTo(2));
-		assertThat(sources.precedenceOf(PropertySource.named(StandardEnvironment.SYSTEM_PROPERTIES_PROPERTY_SOURCE_NAME)), equalTo(2));
-		assertThat(sources.precedenceOf(PropertySource.named(StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME)), equalTo(3));
-		assertThat(sources.size(), is(4));
-
-		System.clearProperty(JNDI_PROPERTY_SOURCE_ENABLED_FLAG);
-	}
 }