Class AbstractEnvironment

Field Detail

• IGNORE_GETENV_PROPERTY_NAME

  public static final String IGNORE_GETENV_PROPERTY_NAME

  System property that instructs Spring to ignore system environment variables, i.e. to never attempt to retrieve such a variable via System.getenv().

  The default is "false", falling back to system environment variable checks if a Spring environment property (e.g. a placeholder in a configuration String) isn't resolvable otherwise. Consider switching this flag to "true" if you experience log warnings from getenv calls coming from Spring, e.g. on WebSphere with strict SecurityManager settings and AccessControlExceptions warnings.

  See Also:

  suppressGetenvAccess(), Constant Field Values

• ACTIVE_PROFILES_PROPERTY_NAME

  public static final String ACTIVE_PROFILES_PROPERTY_NAME

  Name of property to set to specify active profiles: "spring.profiles.active". Value may be comma delimited.

  Note that certain shell environments such as Bash disallow the use of the period character in variable names. Assuming that Spring's SystemEnvironmentPropertySource is in use, this property may be specified as an environment variable as SPRING_PROFILES_ACTIVE.

  See Also:

  ConfigurableEnvironment.setActiveProfiles(java.lang.String...), Constant Field Values

• DEFAULT_PROFILES_PROPERTY_NAME

  public static final String DEFAULT_PROFILES_PROPERTY_NAME

  Name of property to set to specify profiles active by default: "spring.profiles.default". Value may be comma delimited.

  Note that certain shell environments such as Bash disallow the use of the period character in variable names. Assuming that Spring's SystemEnvironmentPropertySource is in use, this property may be specified as an environment variable as SPRING_PROFILES_DEFAULT.

  See Also:

  ConfigurableEnvironment.setDefaultProfiles(java.lang.String...), Constant Field Values

• RESERVED_DEFAULT_PROFILE_NAME

  protected static final String RESERVED_DEFAULT_PROFILE_NAME

  Name of reserved default profile name: "default". If no default profile names are explicitly and no active profile names are explicitly set, this profile will automatically be activated by default.

  See Also:

  getReservedDefaultProfiles(), ConfigurableEnvironment.setDefaultProfiles(java.lang.String...), ConfigurableEnvironment.setActiveProfiles(java.lang.String...), DEFAULT_PROFILES_PROPERTY_NAME, ACTIVE_PROFILES_PROPERTY_NAME, Constant Field Values

• logger

  protected final Log logger

Constructor Detail

• AbstractEnvironment

  public AbstractEnvironment()

  Create a new Environment instance, calling back to customizePropertySources(MutablePropertySources) during construction to allow subclasses to contribute or manipulate PropertySource instances as appropriate.

  See Also:

  customizePropertySources(MutablePropertySources)

Method Detail

• customizePropertySources

  protected void customizePropertySources​(MutablePropertySources propertySources)

  Customize the set of PropertySource objects to be searched by this Environment during calls to getProperty(String) and related methods.

  Subclasses that override this method are encouraged to add property sources using MutablePropertySources.addLast(PropertySource) such that further subclasses may call super.customizePropertySources() with predictable results. For example:

   public class Level1Environment extends AbstractEnvironment {
       @Override
       protected void customizePropertySources(MutablePropertySources propertySources) {
           super.customizePropertySources(propertySources); // no-op from base class
           propertySources.addLast(new PropertySourceA(...));
           propertySources.addLast(new PropertySourceB(...));
       }
   }
  
   public class Level2Environment extends Level1Environment {
       @Override
       protected void customizePropertySources(MutablePropertySources propertySources) {
           super.customizePropertySources(propertySources); // add all from superclass
           propertySources.addLast(new PropertySourceC(...));
           propertySources.addLast(new PropertySourceD(...));
       }
   }
   

  In this arrangement, properties will be resolved against sources A, B, C, D in that order. That is to say that property source "A" has precedence over property source "D". If the Level2Environment subclass wished to give property sources C and D higher precedence than A and B, it could simply call super.customizePropertySources after, rather than before adding its own:

   public class Level2Environment extends Level1Environment {
       @Override
       protected void customizePropertySources(MutablePropertySources propertySources) {
           propertySources.addLast(new PropertySourceC(...));
           propertySources.addLast(new PropertySourceD(...));
           super.customizePropertySources(propertySources); // add all from superclass
       }
   }
   

  The search order is now C, D, A, B as desired.

  Beyond these recommendations, subclasses may use any of the add*, remove, or replace methods exposed by MutablePropertySources in order to create the exact arrangement of property sources desired.

  The base implementation registers no property sources.

  Note that clients of any ConfigurableEnvironment may further customize property sources via the getPropertySources() accessor, typically within an ApplicationContextInitializer. For example:

   ConfigurableEnvironment env = new StandardEnvironment();
   env.getPropertySources().addLast(new PropertySourceX(...));
   

  A warning about instance variable access

  Instance variables declared in subclasses and having default initial values should not be accessed from within this method. Due to Java object creation lifecycle constraints, any initial value will not yet be assigned when this callback is invoked by the AbstractEnvironment() constructor, which may lead to a NullPointerException or other problems. If you need to access default values of instance variables, leave this method as a no-op and perform property source manipulation and instance variable access directly within the subclass constructor. Note that assigning values to instance variables is not problematic; it is only attempting to read default values that must be avoided.

  See Also:

  MutablePropertySources, PropertySourcesPropertyResolver, ApplicationContextInitializer

• getReservedDefaultProfiles

  protected Set<String> getReservedDefaultProfiles()

  Return the set of reserved default profile names. This implementation returns "default". Subclasses may override in order to customize the set of reserved names.

  See Also:

  RESERVED_DEFAULT_PROFILE_NAME, doGetDefaultProfiles()

• getActiveProfiles

  public String[] getActiveProfiles()

  Description copied from interface: Environment
  Return the set of profiles explicitly made active for this environment. Profiles are used for creating logical groupings of bean definitions to be registered conditionally, for example based on deployment environment. Profiles can be activated by setting "spring.profiles.active" as a system property or by calling ConfigurableEnvironment.setActiveProfiles(String...).

  If no profiles have explicitly been specified as active, then any default profiles will automatically be activated.

  Specified by:

  getActiveProfiles in interface Environment

  See Also:

  Environment.getDefaultProfiles(), ConfigurableEnvironment.setActiveProfiles(java.lang.String...), ACTIVE_PROFILES_PROPERTY_NAME

• doGetActiveProfiles

  protected Set<String> doGetActiveProfiles()

  Return the set of active profiles as explicitly set through setActiveProfiles(java.lang.String...) or if the current set of active profiles is empty, check for the presence of the "spring.profiles.active" property and assign its value to the set of active profiles.

  See Also:

  getActiveProfiles(), ACTIVE_PROFILES_PROPERTY_NAME

• setActiveProfiles

  public void setActiveProfiles​(String... profiles)

  Description copied from interface: ConfigurableEnvironment
  Specify the set of profiles active for this Environment. Profiles are evaluated during container bootstrap to determine whether bean definitions should be registered with the container.

  Any existing active profiles will be replaced with the given arguments; call with zero arguments to clear the current set of active profiles. Use ConfigurableEnvironment.addActiveProfile(java.lang.String) to add a profile while preserving the existing set.

  Specified by:

  setActiveProfiles in interface ConfigurableEnvironment

  See Also:

  ConfigurableEnvironment.addActiveProfile(java.lang.String), ConfigurableEnvironment.setDefaultProfiles(java.lang.String...), Profile, ACTIVE_PROFILES_PROPERTY_NAME

• addActiveProfile

  public void addActiveProfile​(String profile)

  Description copied from interface: ConfigurableEnvironment
  Add a profile to the current set of active profiles.

  Specified by:

  addActiveProfile in interface ConfigurableEnvironment

  See Also:

  ConfigurableEnvironment.setActiveProfiles(java.lang.String...)

• getDefaultProfiles

  public String[] getDefaultProfiles()

  Description copied from interface: Environment
  Return the set of profiles to be active by default when no active profiles have been set explicitly.

  Specified by:

  getDefaultProfiles in interface Environment

  See Also:

  Environment.getActiveProfiles(), ConfigurableEnvironment.setDefaultProfiles(java.lang.String...), DEFAULT_PROFILES_PROPERTY_NAME

• doGetDefaultProfiles

  protected Set<String> doGetDefaultProfiles()

  Return the set of default profiles explicitly set via setDefaultProfiles(String...) or if the current set of default profiles consists only of reserved default profiles, then check for the presence of the "spring.profiles.default" property and assign its value (if any) to the set of default profiles.

  See Also:

  AbstractEnvironment(), getDefaultProfiles(), DEFAULT_PROFILES_PROPERTY_NAME, getReservedDefaultProfiles()

• setDefaultProfiles

  public void setDefaultProfiles​(String... profiles)

  Specify the set of profiles to be made active by default if no other profiles are explicitly made active through setActiveProfiles(java.lang.String...).

  Calling this method removes overrides any reserved default profiles that may have been added during construction of the environment.

  Specified by:

  setDefaultProfiles in interface ConfigurableEnvironment

  See Also:

  AbstractEnvironment(), getReservedDefaultProfiles()

• acceptsProfiles

  public boolean acceptsProfiles​(String... profiles)

  Description copied from interface: Environment
  Return whether one or more of the given profiles is active or, in the case of no explicit active profiles, whether one or more of the given profiles is included in the set of default profiles. If a profile begins with '!' the logic is inverted, i.e. the method will return true if the given profile is not active. For example,

  env.acceptsProfiles("p1", "!p2")

  will return true if profile 'p1' is active or 'p2' is not active.

  Specified by:

  acceptsProfiles in interface Environment

  See Also:

  Environment.getActiveProfiles(), Environment.getDefaultProfiles()

• isProfileActive

  protected boolean isProfileActive​(String profile)

  Return whether the given profile is active, or if active profiles are empty whether the profile should be active by default.

  Throws:

  IllegalArgumentException - per validateProfile(String)

• validateProfile

  protected void validateProfile​(String profile)

  Validate the given profile, called internally prior to adding to the set of active or default profiles.

  Subclasses may override to impose further restrictions on profile syntax.

  Throws:

  IllegalArgumentException - if the profile is null, empty, whitespace-only or begins with the profile NOT operator (!).

  See Also:

  acceptsProfiles(java.lang.String...), addActiveProfile(java.lang.String), setDefaultProfiles(java.lang.String...)

• getPropertySources

  public MutablePropertySources getPropertySources()

  Description copied from interface: ConfigurableEnvironment
  Return the PropertySources for this Environment in mutable form, allowing for manipulation of the set of PropertySource objects that should be searched when resolving properties against this Environment object. The various MutablePropertySources methods such as addFirst, addLast, addBefore and addAfter allow for fine-grained control over property source ordering. This is useful, for example, in ensuring that certain user-defined property sources have search precedence over default property sources such as the set of system properties or the set of system environment variables.

  Specified by:

  getPropertySources in interface ConfigurableEnvironment

  See Also:

  customizePropertySources(org.springframework.core.env.MutablePropertySources)

• getSystemProperties

  public Map<String,​Object> getSystemProperties()

  Description copied from interface: ConfigurableEnvironment
  Return the value of System.getProperties() if allowed by the current SecurityManager, otherwise return a map implementation that will attempt to access individual keys using calls to System.getProperty(String).

  Note that most Environment implementations will include this system properties map as a default PropertySource to be searched. Therefore, it is recommended that this method not be used directly unless bypassing other property sources is expressly intended.

  Calls to Map.get(Object) on the Map returned will never throw IllegalAccessException; in cases where the SecurityManager forbids access to a property, null will be returned and an INFO-level log message will be issued noting the exception.

  Specified by:

  getSystemProperties in interface ConfigurableEnvironment

• getSystemEnvironment

  public Map<String,​Object> getSystemEnvironment()

  Description copied from interface: ConfigurableEnvironment
  Return the value of System.getenv() if allowed by the current SecurityManager, otherwise return a map implementation that will attempt to access individual keys using calls to System.getenv(String).

  Note that most Environment implementations will include this system environment map as a default PropertySource to be searched. Therefore, it is recommended that this method not be used directly unless bypassing other property sources is expressly intended.

  Calls to Map.get(Object) on the Map returned will never throw IllegalAccessException; in cases where the SecurityManager forbids access to a property, null will be returned and an INFO-level log message will be issued noting the exception.

  Specified by:

  getSystemEnvironment in interface ConfigurableEnvironment

• suppressGetenvAccess

  protected boolean suppressGetenvAccess()

  Determine whether to suppress System.getenv()/System.getenv(String) access for the purposes of getSystemEnvironment().

  If this method returns true, an empty dummy Map will be used instead of the regular system environment Map, never even trying to call getenv and therefore avoiding security manager warnings (if any).

  The default implementation checks for the "spring.getenv.ignore" system property, returning true if its value equals "true" in any case.

  See Also:

  IGNORE_GETENV_PROPERTY_NAME, SpringProperties.getFlag(java.lang.String)

• merge

  public void merge​(ConfigurableEnvironment parent)

  Description copied from interface: ConfigurableEnvironment
  Append the given parent environment's active profiles, default profiles and property sources to this (child) environment's respective collections of each.

  For any identically-named PropertySource instance existing in both parent and child, the child instance is to be preserved and the parent instance discarded. This has the effect of allowing overriding of property sources by the child as well as avoiding redundant searches through common property source types, e.g. system environment and system properties.

  Active and default profile names are also filtered for duplicates, to avoid confusion and redundant storage.

  The parent environment remains unmodified in any case. Note that any changes to the parent environment occurring after the call to merge will not be reflected in the child. Therefore, care should be taken to configure parent property sources and profile information prior to calling merge.

  Specified by:

  merge in interface ConfigurableEnvironment

  Parameters:

  parent - the environment to merge with

  See Also:

  AbstractApplicationContext.setParent(org.springframework.context.ApplicationContext)

• getConversionService

  public ConfigurableConversionService getConversionService()

  Description copied from interface: ConfigurablePropertyResolver
  Return the ConfigurableConversionService used when performing type conversions on properties.

  The configurable nature of the returned conversion service allows for the convenient addition and removal of individual Converter instances:

   ConfigurableConversionService cs = env.getConversionService();
   cs.addConverter(new FooConverter());
   

  Specified by:

  getConversionService in interface ConfigurablePropertyResolver

  See Also:

  PropertyResolver.getProperty(String, Class), ConverterRegistry.addConverter(org.springframework.core.convert.converter.Converter<?, ?>)

• setConversionService

  public void setConversionService​(ConfigurableConversionService conversionService)

  Description copied from interface: ConfigurablePropertyResolver
  Set the ConfigurableConversionService to be used when performing type conversions on properties.

  Note: as an alternative to fully replacing the ConversionService, consider adding or removing individual Converter instances by drilling into ConfigurablePropertyResolver.getConversionService() and calling methods such as #addConverter.

  Specified by:

  setConversionService in interface ConfigurablePropertyResolver

  See Also:

  PropertyResolver.getProperty(String, Class), ConfigurablePropertyResolver.getConversionService(), ConverterRegistry.addConverter(org.springframework.core.convert.converter.Converter<?, ?>)

• setPlaceholderPrefix

  public void setPlaceholderPrefix​(String placeholderPrefix)

  Description copied from interface: ConfigurablePropertyResolver
  Set the prefix that placeholders replaced by this resolver must begin with.

  Specified by:

  setPlaceholderPrefix in interface ConfigurablePropertyResolver

• setPlaceholderSuffix

  public void setPlaceholderSuffix​(String placeholderSuffix)

  Description copied from interface: ConfigurablePropertyResolver
  Set the suffix that placeholders replaced by this resolver must end with.

  Specified by:

  setPlaceholderSuffix in interface ConfigurablePropertyResolver

• setValueSeparator

  public void setValueSeparator​(String valueSeparator)

  Description copied from interface: ConfigurablePropertyResolver
  Specify the separating character between the placeholders replaced by this resolver and their associated default value, or null if no such special character should be processed as a value separator.

  Specified by:

  setValueSeparator in interface ConfigurablePropertyResolver

• setIgnoreUnresolvableNestedPlaceholders

  public void setIgnoreUnresolvableNestedPlaceholders​(boolean ignoreUnresolvableNestedPlaceholders)

  Description copied from interface: ConfigurablePropertyResolver
  Set whether to throw an exception when encountering an unresolvable placeholder nested within the value of a given property. A false value indicates strict resolution, i.e. that an exception will be thrown. A true value indicates that unresolvable nested placeholders should be passed through in their unresolved ${...} form.

  Implementations of PropertyResolver.getProperty(String) and its variants must inspect the value set here to determine correct behavior when property values contain unresolvable placeholders.

  Specified by:

  setIgnoreUnresolvableNestedPlaceholders in interface ConfigurablePropertyResolver

• setRequiredProperties

  public void setRequiredProperties​(String... requiredProperties)

  Description copied from interface: ConfigurablePropertyResolver
  Specify which properties must be present, to be verified by ConfigurablePropertyResolver.validateRequiredProperties().

  Specified by:

  setRequiredProperties in interface ConfigurablePropertyResolver

• validateRequiredProperties

  public void validateRequiredProperties()
                                  throws MissingRequiredPropertiesException

  Description copied from interface: ConfigurablePropertyResolver
  Validate that each of the properties specified by ConfigurablePropertyResolver.setRequiredProperties(java.lang.String...) is present and resolves to a non-null value.

  Specified by:

  validateRequiredProperties in interface ConfigurablePropertyResolver

  Throws:

  MissingRequiredPropertiesException - if any of the required properties are not resolvable.

• containsProperty

  public boolean containsProperty​(String key)

  Description copied from interface: PropertyResolver
  Return whether the given property key is available for resolution, i.e. if the value for the given key is not null.

  Specified by:

  containsProperty in interface PropertyResolver

• getProperty

  public String getProperty​(String key)

  Description copied from interface: PropertyResolver
  Return the property value associated with the given key, or null if the key cannot be resolved.

  Specified by:

  getProperty in interface PropertyResolver

  Parameters:

  key - the property name to resolve

  See Also:

  PropertyResolver.getProperty(String, String), PropertyResolver.getProperty(String, Class), PropertyResolver.getRequiredProperty(String)

• getProperty

  public String getProperty​(String key,
                            String defaultValue)

  Description copied from interface: PropertyResolver
  Return the property value associated with the given key, or defaultValue if the key cannot be resolved.

  Specified by:

  getProperty in interface PropertyResolver

  Parameters:

  key - the property name to resolve

  defaultValue - the default value to return if no value is found

  See Also:

  PropertyResolver.getRequiredProperty(String), PropertyResolver.getProperty(String, Class)

• getProperty

  public <T> T getProperty​(String key,
                           Class<T> targetType)

  Description copied from interface: PropertyResolver
  Return the property value associated with the given key, or null if the key cannot be resolved.

  Specified by:

  getProperty in interface PropertyResolver

  Parameters:

  key - the property name to resolve

  targetType - the expected type of the property value

  See Also:

  PropertyResolver.getRequiredProperty(String, Class)

• getProperty

  public <T> T getProperty​(String key,
                           Class<T> targetType,
                           T defaultValue)

  Description copied from interface: PropertyResolver
  Return the property value associated with the given key, or defaultValue if the key cannot be resolved.

  Specified by:

  getProperty in interface PropertyResolver

  Parameters:

  key - the property name to resolve

  targetType - the expected type of the property value

  defaultValue - the default value to return if no value is found

  See Also:

  PropertyResolver.getRequiredProperty(String, Class)

• getPropertyAsClass

  @Deprecated
  public <T> Class<T> getPropertyAsClass​(String key,
                                         Class<T> targetType)

  Deprecated.
  Description copied from interface: PropertyResolver
  Convert the property value associated with the given key to a Class of type T or null if the key cannot be resolved.

  Specified by:

  getPropertyAsClass in interface PropertyResolver

  See Also:

  PropertyResolver.getProperty(String, Class)

• getRequiredProperty

  public String getRequiredProperty​(String key)
                             throws IllegalStateException

  Description copied from interface: PropertyResolver
  Return the property value associated with the given key (never null).

  Specified by:

  getRequiredProperty in interface PropertyResolver

  Throws:

  IllegalStateException - if the key cannot be resolved

  See Also:

  PropertyResolver.getRequiredProperty(String, Class)

• getRequiredProperty

  public <T> T getRequiredProperty​(String key,
                                   Class<T> targetType)
                            throws IllegalStateException

  Description copied from interface: PropertyResolver
  Return the property value associated with the given key, converted to the given targetType (never null).

  Specified by:

  getRequiredProperty in interface PropertyResolver

  Throws:

  IllegalStateException - if the given key cannot be resolved

• resolvePlaceholders

  public String resolvePlaceholders​(String text)

  Description copied from interface: PropertyResolver
  Resolve ${...} placeholders in the given text, replacing them with corresponding property values as resolved by PropertyResolver.getProperty(java.lang.String). Unresolvable placeholders with no default value are ignored and passed through unchanged.

  Specified by:

  resolvePlaceholders in interface PropertyResolver

  Parameters:

  text - the String to resolve

  Returns:

  the resolved String (never null)

  See Also:

  PropertyResolver.resolveRequiredPlaceholders(java.lang.String), SystemPropertyUtils.resolvePlaceholders(String)

• resolveRequiredPlaceholders

  public String resolveRequiredPlaceholders​(String text)
                                     throws IllegalArgumentException

  Description copied from interface: PropertyResolver
  Resolve ${...} placeholders in the given text, replacing them with corresponding property values as resolved by PropertyResolver.getProperty(java.lang.String). Unresolvable placeholders with no default value will cause an IllegalArgumentException to be thrown.

  Specified by:

  resolveRequiredPlaceholders in interface PropertyResolver

  Returns:

  the resolved String (never null)

  Throws:

  IllegalArgumentException - if given text is null or if any placeholders are unresolvable

  See Also:

  SystemPropertyUtils.resolvePlaceholders(String, boolean)

• toString

  public String toString()

  Overrides:

  toString in class Object