问题
I'm using:
- Primefaces 6.1
- JSF: 2.2.10
- javax.validation:1.1.0.Final
- validator impl: hibernate-validator 5.0.1.Final
- GAE: 1.9.52
I follow the example for CSV (Client Side Validation) using backend bean from: https://www.primefaces.org/showcase/ui/csv/bean.xhtml
The expected result should be:
And what I get right now:
The bean validation is not working.
I have below configure in web.xml
<context-param>
<param-name>primefaces.CLIENT_SIDE_VALIDATION</param-name>
<param-value>true</param-value>
</context-param>
Few similar posts said need downgrade jsf to 2.2.2, I tried but still not working.
Right now the workaround for CSV is either
- using jsf tag validation based on the demo
https://www.primefaces.org/showcase/ui/csv/basic.xhtml
For example:
<p:inputText id="age" value="#{beanValidationView.age}" label="Age">
<f:validateLongRange for="age" minimum="10" maximum="20" />
</p:inputText>
- Or create my own validator
for example: http://www.supermanhamuerto.com/doku.php?id=java:validatorinprimefaces
BTW, I don't think it is related to GAE. Because I tried with a new Dynamic Web Project using Tomcat 9, it give me the same result as shown in below screen capture.
Is that any thing(s) I miss configured or having diff version of jar causing that problem?
回答1:
I got the same error.
I fixed it by upgrading hibernate-validator from:
5.1.3.Final
to:
5.3.5.Final
I kept Primefaces 6.1.
回答2:
By placing dependencies (i.e slf4j-jdk14, slf4j-api and jboss-el), Hibernate Validator work on Tomcat 9 but not GAE. After configured the log level to FINER , logger show below entriies:
May 04, 2017 9:10:08 AM com.sun.faces.config.processor.ApplicationConfigProcessor addSystemEventListener
FINE: Subscribing for event javax.faces.event.PostConstructApplicationEvent and source javax.faces.application.Application using listener org.primefaces.extensions.application.PostConstructApplicationEventListener
May 04, 2017 9:10:08 AM com.sun.faces.config.processor.ApplicationConfigProcessor isBeanValidatorAvailable
FINE: java.lang.NoClassDefFoundError: javax.naming.InitialContext is a restricted class. Please see the Google App Engine developer's guide for more details.
java.lang.NoClassDefFoundError: javax.naming.InitialContext is a restricted class. Please see the Google App Engine developer's guide for more details.
at com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:50)
at com.sun.faces.config.processor.ApplicationConfigProcessor.isBeanValidatorAvailable(ApplicationConfigProcessor.java:434)
at com.sun.faces.config.processor.ApplicationConfigProcessor.registerDefaultValidatorIds(ApplicationConfigProcessor.java:396)
at com.sun.faces.config.processor.ApplicationConfigProcessor.process(ApplicationConfigProcessor.java:353)
at com.sun.faces.config.processor.AbstractConfigProcessor.invokeNext(AbstractConfigProcessor.java:152)
at com.sun.faces.config.processor.LifecycleConfigProcessor.process(LifecycleConfigProcessor.java:137)
That is a "NoClassDefFoundError", however log in FINE level instead of Warning and return more meaningful message. That bad.
So I make a small change to the isBeanValidatorAvailable() as below to make it work on GAE
static boolean isBeanValidatorAvailable() {
boolean result = false;
final String beansValidationAvailabilityCacheKey =
"javax.faces.BEANS_VALIDATION_AVAILABLE";
Map<String,Object> appMap = FacesContext.getCurrentInstance().getExternalContext().getApplicationMap();
if (appMap.containsKey(beansValidationAvailabilityCacheKey)) {
result = (Boolean) appMap.get(beansValidationAvailabilityCacheKey);
} else {
try {
// Code for Google App Engine
ValidatorFactory validatorFactory = null;
try{
Object cachedObject=FacesContext.getCurrentInstance().getExternalContext().getApplicationMap().get(BeanValidator.VALIDATOR_FACTORY_KEY);
if (cachedObject instanceof ValidatorFactory) {
validatorFactory=(ValidatorFactory)cachedObject;
} else {
validatorFactory=Validation.buildDefaultValidatorFactory();
}
}catch(ValidationException e) {
LOGGER.log(Level.WARNING, "Could not build a default Bean Validator factory",e);
}
if (null != validatorFactory) {
appMap.put(BeanValidator.VALIDATOR_FACTORY_KEY, validatorFactory);
result = true;
}
LOGGER.log(Level.FINE, "result=" +result +", validatorFactory=" +validatorFactory);
/* incompatible with Google App Engine
*
Thread.currentThread().getContextClassLoader().loadClass("javax.validation.MessageInterpolator");
// Check if the Implementation is available.
Object cachedObject = appMap.get(BeanValidator.VALIDATOR_FACTORY_KEY);
if(cachedObject instanceof ValidatorFactory) {
result = true;
} else {
Context initialContext = null;
try {
initialContext = new InitialContext();
} catch (NoClassDefFoundError nde) {
// on google app engine InitialContext is forbidden to use and GAE throws NoClassDefFoundError
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE, nde.toString(), nde);
}
} catch (NamingException ne) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING, ne.toString(), ne);
}
}
try {
Object validatorFactory = initialContext.lookup("java:comp/ValidatorFactory");
if (null != validatorFactory) {
appMap.put(BeanValidator.VALIDATOR_FACTORY_KEY, validatorFactory);
result = true;
}
} catch (NamingException root) {
if (LOGGER.isLoggable(Level.FINE)) {
String msg = "Could not build a default Bean Validator factory: "
+ root.getMessage();
LOGGER.fine(msg);
}
}
if (!result) {
try {
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
appMap.put(BeanValidator.VALIDATOR_FACTORY_KEY, factory);
result = true;
} catch(Throwable throwable) {
}
}
}
*/
} catch (Throwable t) { // CNFE or ValidationException or any other
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("Unable to load Beans Validation");
}
}
appMap.put(beansValidationAvailabilityCacheKey, result);
}
return result;
}
After all this JSR 303 (Bean Validation) problem is related to GAE restriction on JSF2.
A working copy can get from Google Drive.
来源：https://stackoverflow.com/questions/43740371/bean-validation-jsr-303-for-primefaces-not-working