system-properties-mode gone from 3.1.0.RC1?

[javapda]

I have a spring configuration that is using the new 3.1 schemas. But I noticed that the system-properties-mode no longer seems to be available when setting up context: property-placeholder.

Q: Has system-properties-mode been replaced?

Q: Has system-properties-mode been removed from property-placeholder?


3.1 Schema in spring-context-3.1.xsd in org.springframework.context-3.1.0.BUILD-SNAPSHOT.jar:

	<xsd:element name="property-placeholder">
		<xsd:annotation>
			<xsd:documentation><![CDATA[
	Activates replacement of ${...} placeholders, resolved against the specified properties file or
	Properties object (if any). Defines a PropertySourcesPlaceholderConfigurer within the context.
	For backward compatibility with versions earlier than Spring 3.1, a PropertyPlaceholderConfigurer will be
	registered if the 'system-properties-mode' attribute has been explicitly assigned a value.
			]]></xsd:documentation>
			<xsd:appinfo>
				<tool:annotation>
					<tool:exports
						type="org.springframework.context.support.PropertySourcesPlaceholderConfigurer" />
				</tool:annotation>
			</xsd:appinfo>
		</xsd:annotation>
		<xsd:complexType>
			<xsd:complexContent>
				<xsd:extension base="propertyPlaceholder" />
			</xsd:complexContent>
		</xsd:complexType>
	</xsd:element>

3.0 Schema in spring-context-3.0.xsd in org.springframework.context-3.1.0.BUILD-SNAPSHOT.jar:

	<xsd:element name="property-placeholder">
		<xsd:annotation>
			<xsd:documentation><![CDATA[
	Activates replacement of ${...} placeholders, resolved against the specified properties file or
	Properties object (if any). Falls back to resolving placeholders against JVM system properties.
	Alternatively, define a parameterized PropertyPlaceholderConfigurer bean in the context.
			]]></xsd:documentation>
			<xsd:appinfo>
				<tool:annotation>
					<tool:exports
						type="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" />
				</tool:annotation>
			</xsd:appinfo>
		</xsd:annotation>
		<xsd:complexType>
			<xsd:complexContent>
				<xsd:extension base="propertyPlaceholder">
					<xsd:attribute name="system-properties-mode" default="FALLBACK">
						<xsd:simpleType>
							<xsd:restriction base="xsd:string">
								<xsd:enumeration value="NEVER"/>
								<xsd:enumeration value="FALLBACK"/>
								<xsd:enumeration value="OVERRIDE"/>
							</xsd:restriction>
						</xsd:simpleType>
					</xsd:attribute>
				</xsd:extension>
			</xsd:complexContent>
		</xsd:complexType>
	</xsd:element>

[rasivasu]

In Spring 3.1, it is encouraged to use PropertySourcesPlaceholderConfigurer instead of PlaceholderConfigurerSupport unless (a) one is using BeanFactory and (b) existing configuration uses systemPropertiesMode. In spring-context-3.0.xsd the default setting is being assigned to fallback whereas in spring-context-3.1, the default is not assigned. I think you need to explicitly assign value systemPropertiesMode (which itself has been given for backward compatibility).