org.springframework.context.support

Class LiveBeansView

java.lang.Object

org.springframework.context.support.LiveBeansView

All Implemented Interfaces:

Aware, ApplicationContextAware, LiveBeansViewMBean

Direct Known Subclasses:

ServletContextLiveBeansView

public class LiveBeansView
extends java.lang.Object
implements LiveBeansViewMBean, ApplicationContextAware

Adapter for live beans view exposure, building a snapshot of current beans and their dependencies from either a local ApplicationContext (with a local LiveBeansView bean definition) or all registered ApplicationContexts (driven by the "spring.liveBeansView.mbeanDomain" environment property).

Note: This feature is still in beta and primarily designed for use with Spring Tool Suite 3.1 and higher.

Since:

3.2

Author:

Juergen Hoeller

See Also:

getSnapshotAsJson(), LiveBeansViewServlet

Field Summary

Fields

Modifier and Type	Field and Description
private ConfigurableApplicationContext	applicationContext
private static java.util.Set<ConfigurableApplicationContext>	applicationContexts
static java.lang.String	MBEAN_APPLICATION_KEY
static java.lang.String	MBEAN_DOMAIN_PROPERTY_NAME

Constructor Summary

Constructors

Constructor and Description
LiveBeansView()

Method Summary

Modifier and Type	Method and Description
protected java.util.Set<ConfigurableApplicationContext>	findApplicationContexts() Find all applicable ApplicationContexts for the current application.
protected java.lang.String	generateJson(java.util.Set<ConfigurableApplicationContext> contexts) Actually generate a JSON snapshot of the beans in the given ApplicationContexts.
protected java.lang.String	getEscapedResourceDescription(BeanDefinition bd) Determine a resource description for the given bean definition and apply basic JSON escaping (backslashes, double quotes) to it.
java.lang.String	getSnapshotAsJson() Generate a JSON snapshot of current beans and their dependencies, finding all active ApplicationContexts through findApplicationContexts(), then delegating to generateJson(java.util.Set).
protected boolean	isBeanEligible(java.lang.String beanName, BeanDefinition bd, ConfigurableBeanFactory bf) Determine whether the specified bean is eligible for inclusion in the LiveBeansView JSON snapshot.
(package private) static void	registerApplicationContext(ConfigurableApplicationContext applicationContext)
void	setApplicationContext(ApplicationContext applicationContext) Set the ApplicationContext that this object runs in.
(package private) static void	unregisterApplicationContext(ConfigurableApplicationContext applicationContext)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MBEAN_DOMAIN_PROPERTY_NAME

public static final java.lang.String MBEAN_DOMAIN_PROPERTY_NAME

See Also:

Constant Field Values

MBEAN_APPLICATION_KEY

public static final java.lang.String MBEAN_APPLICATION_KEY

See Also:

Constant Field Values

applicationContexts

private static final java.util.Set<ConfigurableApplicationContext> applicationContexts

applicationContext

private ConfigurableApplicationContext applicationContext

Constructor Detail

LiveBeansView

public LiveBeansView()

Method Detail

registerApplicationContext

static void registerApplicationContext(ConfigurableApplicationContext applicationContext)

unregisterApplicationContext

static void unregisterApplicationContext(ConfigurableApplicationContext applicationContext)

setApplicationContext

public void setApplicationContext(ApplicationContext applicationContext)

Description copied from interface: ApplicationContextAware

Set the ApplicationContext that this object runs in. Normally this call will be used to initialize the object.

Invoked after population of normal bean properties but before an init callback such as InitializingBean.afterPropertiesSet() or a custom init-method. Invoked after ResourceLoaderAware.setResourceLoader(org.springframework.core.io.ResourceLoader), ApplicationEventPublisherAware.setApplicationEventPublisher(org.springframework.context.ApplicationEventPublisher) and MessageSourceAware, if applicable.

Specified by:

setApplicationContext in interface ApplicationContextAware

Parameters:

applicationContext - the ApplicationContext object to be used by this object

See Also:

BeanInitializationException

getSnapshotAsJson

public java.lang.String getSnapshotAsJson()

Generate a JSON snapshot of current beans and their dependencies, finding all active ApplicationContexts through findApplicationContexts(), then delegating to generateJson(java.util.Set).

Specified by:

getSnapshotAsJson in interface LiveBeansViewMBean

findApplicationContexts

protected java.util.Set<ConfigurableApplicationContext> findApplicationContexts()

Find all applicable ApplicationContexts for the current application.

Called if no specific ApplicationContext has been set for this LiveBeansView.

Returns:

the set of ApplicationContexts

generateJson

protected java.lang.String generateJson(java.util.Set<ConfigurableApplicationContext> contexts)

Actually generate a JSON snapshot of the beans in the given ApplicationContexts.

This implementation doesn't use any JSON parsing libraries in order to avoid third-party library dependencies. It produces an array of context description objects, each containing a context and parent attribute as well as a beans attribute with nested bean description objects. Each bean object contains a bean, scope, type and resource attribute, as well as a dependencies attribute with a nested array of bean names that the present bean depends on.

Parameters:

contexts - the set of ApplicationContexts

Returns:

the JSON document

isBeanEligible

protected boolean isBeanEligible(java.lang.String beanName,
                                 BeanDefinition bd,
                                 ConfigurableBeanFactory bf)

Determine whether the specified bean is eligible for inclusion in the LiveBeansView JSON snapshot.

Parameters:

beanName - the name of the bean

bd - the corresponding bean definition

bf - the containing bean factory

Returns:

true if the bean is to be included; false otherwise

getEscapedResourceDescription

protected java.lang.String getEscapedResourceDescription(BeanDefinition bd)

Determine a resource description for the given bean definition and apply basic JSON escaping (backslashes, double quotes) to it.

Parameters:

bd - the bean definition to build the resource description for

Returns:

the JSON-escaped resource description