@Override
protected void initServletContext(ServletContext servletContext) {
Collection<ViewResolver> matchingBeans =
BeanFactoryUtils.beansOfTypeIncludingAncestors(getApplicationContext(), ViewResolver.class)
.values();
if (this.viewResolvers == null) {
this.viewResolvers = new ArrayList<ViewResolver>(matchingBeans.size());
for (ViewResolver viewResolver : matchingBeans) {
if (this != viewResolver) {
this.viewResolvers.add(viewResolver);
}
}
} else {
for (int i = 0; i < viewResolvers.size(); i++) {
if (matchingBeans.contains(viewResolvers.get(i))) {
continue;
}
String name = viewResolvers.get(i).getClass().getName() + i;
getApplicationContext()
.getAutowireCapableBeanFactory()
.initializeBean(viewResolvers.get(i), name);
}
}
if (this.viewResolvers.isEmpty()) {
logger.warn(
"Did not find any ViewResolvers to delegate to; please configure them using the "
+ "'viewResolvers' property on the ContentNegotiatingViewResolver");
}
OrderComparator.sort(this.viewResolvers);
}
/**
* Initialize the ViewResolvers used by this class.
* <p>If no ViewResolver beans are defined in the BeanFactory
* for this namespace, we default to InternalResourceViewResolver.
*/
private void initViewResolvers(ApplicationContext context) {
this.viewResolvers = null;
if (this.detectAllViewResolvers) {
// Find all ViewResolvers in the ApplicationContext, including ancestor contexts.
Map<String, ViewResolver> matchingBeans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
context, ViewResolver.class, true, false);
if (!matchingBeans.isEmpty()) {
this.viewResolvers = new ArrayList<ViewResolver>(matchingBeans.values());
// We keep ViewResolvers in sorted order.
OrderComparator.sort(this.viewResolvers);
}
}
else {
try {
ViewResolver vr = context.getBean(VIEW_RESOLVER_BEAN_NAME, ViewResolver.class);
this.viewResolvers = Collections.singletonList(vr);
}
catch (NoSuchBeanDefinitionException ex) {
// Ignore, we'll add a default ViewResolver later.
}
}
// Ensure we have at least one ViewResolver, by registering
// a default ViewResolver if no other resolvers are found.
if (this.viewResolvers == null) {
this.viewResolvers = getDefaultStrategies(context, ViewResolver.class);
if (logger.isDebugEnabled()) {
logger.debug("No ViewResolvers found in portlet '" + getPortletName() + "': using default");
}
}
}
/**
* Initialize the HandlerExceptionResolver used by this class.
* <p>If no bean is defined with the given name in the BeanFactory
* for this namespace, we default to no exception resolver.
*/
private void initHandlerExceptionResolvers(ApplicationContext context) {
this.handlerExceptionResolvers = null;
if (this.detectAllHandlerExceptionResolvers) {
// Find all HandlerExceptionResolvers in the ApplicationContext, including ancestor contexts.
Map<String, HandlerExceptionResolver> matchingBeans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
context, HandlerExceptionResolver.class, true, false);
if (!matchingBeans.isEmpty()) {
this.handlerExceptionResolvers = new ArrayList<HandlerExceptionResolver>(matchingBeans.values());
// We keep HandlerExceptionResolvers in sorted order.
OrderComparator.sort(this.handlerExceptionResolvers);
}
}
else {
try {
HandlerExceptionResolver her = context.getBean(
HANDLER_EXCEPTION_RESOLVER_BEAN_NAME, HandlerExceptionResolver.class);
this.handlerExceptionResolvers = Collections.singletonList(her);
}
catch (NoSuchBeanDefinitionException ex) {
// Ignore, no HandlerExceptionResolver is fine too.
}
}
// Just for consistency, check for default HandlerExceptionResolvers...
// There aren't any in usual scenarios.
if (this.handlerExceptionResolvers == null) {
this.handlerExceptionResolvers = getDefaultStrategies(context, HandlerExceptionResolver.class);
if (logger.isDebugEnabled()) {
logger.debug("No HandlerExceptionResolvers found in portlet '" + getPortletName() + "': using default");
}
}
}
/**
* Initialize the HandlerAdapters used by this class.
* <p>If no HandlerAdapter beans are defined in the BeanFactory
* for this namespace, we default to SimpleControllerHandlerAdapter.
*/
private void initHandlerAdapters(ApplicationContext context) {
this.handlerAdapters = null;
if (this.detectAllHandlerAdapters) {
// Find all HandlerAdapters in the ApplicationContext, including ancestor contexts.
Map<String, HandlerAdapter> matchingBeans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
context, HandlerAdapter.class, true, false);
if (!matchingBeans.isEmpty()) {
this.handlerAdapters = new ArrayList<HandlerAdapter>(matchingBeans.values());
// We keep HandlerAdapters in sorted order.
OrderComparator.sort(this.handlerAdapters);
}
}
else {
try {
HandlerAdapter ha = context.getBean(HANDLER_ADAPTER_BEAN_NAME, HandlerAdapter.class);
this.handlerAdapters = Collections.singletonList(ha);
}
catch (NoSuchBeanDefinitionException ex) {
// Ignore, we'll add a default HandlerAdapter later.
}
}
// Ensure we have at least some HandlerAdapters, by registering
// default HandlerAdapters if no other adapters are found.
if (this.handlerAdapters == null) {
this.handlerAdapters = getDefaultStrategies(context, HandlerAdapter.class);
if (logger.isDebugEnabled()) {
logger.debug("No HandlerAdapters found in portlet '" + getPortletName() + "': using default");
}
}
}
private <T> List<T> getOrderedBeans(Class<T> beanType) {
List<T> components = new ArrayList<T>();
Map<String, T> beans =
BeanFactoryUtils.beansOfTypeIncludingAncestors(applicationContext, beanType, true, false);
if (!beans.isEmpty()) {
components.addAll(beans.values());
OrderComparator.sort(components);
}
return components;
}
/**
* Load the factory implementations of the given type from the default location, using the given
* class loader.
*
* <p>The returned factories are ordered in accordance with the {@link OrderComparator}.
*
* @param factoryClass the interface or abstract class representing the factory
* @param classLoader the ClassLoader to use for loading (can be {@code null} to use the default)
*/
public static <T> List<T> loadFactories(Class<T> factoryClass, ClassLoader classLoader) {
Assert.notNull(factoryClass, "'factoryClass' must not be null");
if (classLoader == null) {
classLoader = SpringFactoriesLoader.class.getClassLoader();
}
List<String> factoryNames = loadFactoryNames(factoryClass, classLoader);
if (logger.isTraceEnabled()) {
logger.trace("Loaded [" + factoryClass.getName() + "] names: " + factoryNames);
}
List<T> result = new ArrayList<T>(factoryNames.size());
for (String factoryName : factoryNames) {
result.add(instantiateFactory(factoryName, factoryClass, classLoader));
}
OrderComparator.sort(result);
return result;
}
/**
* Return an unmodifiable snapshot list of all registered synchronizations for the current thread.
*
* @return unmodifiable List of TransactionSynchronization instances
* @throws IllegalStateException if synchronization is not active
* @see TransactionSynchronization
*/
public static List<TransactionSynchronization> getSynchronizations()
throws IllegalStateException {
List<TransactionSynchronization> synchs = synchronizations.get();
if (synchs == null) {
throw new IllegalStateException("Transaction synchronization is not active");
}
// Return unmodifiable snapshot, to avoid ConcurrentModificationExceptions
// while iterating and invoking synchronization callbacks that in turn
// might register further synchronizations.
if (synchs.isEmpty()) {
return Collections.emptyList();
} else {
// Sort lazily here, not in registerSynchronization.
OrderComparator.sort(synchs);
return Collections.unmodifiableList(new ArrayList<TransactionSynchronization>(synchs));
}
}
public void afterPropertiesSet() throws Exception {
if (usePlaceholderProperties) {
OrderComparator.sort(loaders);
for (PropertiesLoaderSupport loader : loaders) {
PROPERTIES.putAll((Properties) MethodUtils.invokeMethod(loader, "mergeProperties", null));
}
}
PROPERTIES.putAll(mergeProperties());
// 检查某些关键的配置顶是否存在，不存在就报初始化错误
String[] keys = this.necessaryConfigs;
if (keys != null) {
for (String key : keys) {
key = StringUtils.trimToEmpty(key);
if (!PROPERTIES.containsKey(key)) {
throw new IllegalStateException(
"Can not find property \"" + key + "\" in configuration file.");
}
}
}
}
