[[appendix]]
= Appendix

This part of the reference documentation covers topics that apply to multiple modules
within the core Spring Framework.


[[appendix-spring-properties]]
== Spring Properties

{api-spring-framework}/core/SpringProperties.html[`SpringProperties`] is a static holder
for properties that control certain low-level aspects of the Spring Framework. Users can
configure these properties via JVM system properties or programmatically via the
`SpringProperties.setProperty(String key, String value)` method. The latter may be
necessary if the deployment environment disallows custom JVM system properties. As an
alternative, these properties may be configured in a `spring.properties` file in the root
of the classpath -- for example, deployed within the application's JAR file.

The following table lists all currently supported Spring properties.

.Supported Spring Properties
|===
| Name | Description

| `spring.beaninfo.ignore`
| Instructs Spring to use the `Introspector.IGNORE_ALL_BEANINFO` mode when calling the
JavaBeans `Introspector`. See
{api-spring-framework}++/beans/StandardBeanInfoFactory.html#IGNORE_BEANINFO_PROPERTY_NAME++[`CachedIntrospectionResults`]
for details.

| `spring.expression.compiler.mode`
| The mode to use when compiling expressions for the
xref:core/expressions/evaluation.adoc#expressions-compiler-configuration[Spring Expression Language].

| `spring.getenv.ignore`
| Instructs Spring to ignore operating system environment variables if a Spring
`Environment` property -- for example, a placeholder in a configuration String -- isn't
resolvable otherwise. See
{api-spring-framework}++/core/env/AbstractEnvironment.html#IGNORE_GETENV_PROPERTY_NAME++[`AbstractEnvironment`]
for details.

| `spring.index.ignore`
| Instructs Spring to ignore the components index located in
`META-INF/spring.components`. See xref:core/beans/classpath-scanning.adoc#beans-scanning-index[Generating an Index of Candidate Components]
.

| `spring.jdbc.getParameterType.ignore`
| Instructs Spring to ignore `java.sql.ParameterMetaData.getParameterType` completely.
See the note in xref:data-access/jdbc/advanced.adoc#jdbc-batch-list[Batch Operations with a List of Objects].

| `spring.jndi.ignore`
| Instructs Spring to ignore a default JNDI environment, as an optimization for scenarios
where nothing is ever to be found for such JNDI fallback searches to begin with, avoiding
the repeated JNDI lookup overhead. See
{api-spring-framework}++/jndi/JndiLocatorDelegate.html#IGNORE_JNDI_PROPERTY_NAME++[`JndiLocatorDelegate`]
for details.

| `spring.objenesis.ignore`
| Instructs Spring to ignore Objenesis, not even attempting to use it. See
{api-spring-framework}++/objenesis/SpringObjenesis.html#IGNORE_OBJENESIS_PROPERTY_NAME++[`SpringObjenesis`]
for details.

| `spring.test.constructor.autowire.mode`
| The default _test constructor autowire mode_ to use if `@TestConstructor` is not present
on a test class. See xref:testing/annotations/integration-junit-jupiter.adoc#integration-testing-annotations-testconstructor[Changing the default test constructor autowire mode]
.

| `spring.test.context.cache.maxSize`
| The maximum size of the context cache in the _Spring TestContext Framework_. See
xref:testing/testcontext-framework/ctx-management/caching.adoc[Context Caching].

| `spring.test.enclosing.configuration`
| The default _enclosing configuration inheritance mode_ to use if
`@NestedTestConfiguration` is not present on a test class. See
xref:testing/annotations/integration-junit-jupiter.adoc#integration-testing-annotations-nestedtestconfiguration[Changing the default enclosing configuration inheritance mode]
.

|===
