In spring internalization i'm using this configuration
#Bean
public LocaleResolver localeResolver() {
//for this demo, we'll use a SessionLocaleResolver object
//as the name implies, it stores locale info in the session
SessionLocaleResolver resolver = new SessionLocaleResolver();
//default to US locale
resolver.setDefaultLocale(Locale.US);
//get out
return resolver;
}
/**
* This interceptor allows visitors to change the locale on a per-request basis
* #return a LocaleChangeInterceptor object
*/
#Bean
public LocaleChangeInterceptor localeChangeInterceptor() {
//instantiate the object with an empty constructor
LocaleChangeInterceptor interceptor = new LocaleChangeInterceptor();
//the request param that we'll use to determine the locale
interceptor.setParamName("lang");
//get out
return interceptor;
}
/**
* This is where we'll add the intercepter object
* that handles internationalization
*/
#Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(localeChangeInterceptor());
}
And I'm able to change languages from html i.e script and its working fine
window.location.replace('?lang=' + selectedOption);
But is there any way that I can change it from a controller because preferred language will be stored inside DB
so language will be fetched and to be set
example
u = ucr.findByNameContaining(name);
u.getLanguage
<< i have to set language returned from above line >>
#RequestMapping(value = {"/welcome"}, method = RequestMethod.POST)
public String notificationChannelSearchPost(ModelMap model,HttpSession session
,#RequestParam(value="name", defaultValue="") String name) {
u = ucr.findByNameContaining(name);
u.getLanguage
<< i have to set language returned from above line >>
return "welcom.html";
}
thank you
You can set the spring Locale manually in Java by doing something like this
LocaleResolver localeResolver = RequestContextUtils.getLocaleResolver(request);
localeResolver.setLocale(request, response,new Locale(u.getLanguage()));
Related
I am trying to customize the code of the spring oauth authorization server.
for now I have just copied the framework authorizationEndpoint code and placed it in another class. I just changed the address mapping to /custom/oauth/authorize. I have also added #Controller before the class declaration otherwise this code will not be used at all:
#Controller
//#Order(Ordered.HIGHEST_PRECEDENCE)
#SessionAttributes("authorizationRequest")
public class AuthorizationEndpointCustom extends AuthorizationEndpoint {
#Autowired
private AuthenticationManager authenticationManager;
private AuthorizationCodeServices authorizationCodeServices = new InMemoryAuthorizationCodeServices();
private RedirectResolver redirectResolver = new DefaultRedirectResolver();
private UserApprovalHandler userApprovalHandler = new DefaultUserApprovalHandler();
private SessionAttributeStore sessionAttributeStore = new DefaultSessionAttributeStore();
private OAuth2RequestValidator oauth2RequestValidator = new DefaultOAuth2RequestValidator();
private String userApprovalPage = "forward:/oauth/confirm_access";
private String errorPage = "forward:/oauth/error";
private Object implicitLock = new Object();
public void setSessionAttributeStore(SessionAttributeStore sessionAttributeStore) {
this.sessionAttributeStore = sessionAttributeStore;
}
public void setErrorPage(String errorPage) {
this.errorPage = errorPage;
}
#RequestMapping(value = "/oauth/authorize")
public ModelAndView authorize(Map<String, Object> model, #RequestParam Map<String, String> parameters,
SessionStatus sessionStatus, Principal principal) {
System.out.println("\n\ninside custom authorization endpoint");
// Pull out the authorization request first, using the OAuth2RequestFactory. All further logic should
// query off of the authorization request instead of referring back to the parameters map. The contents of the
// parameters map will be stored without change in the AuthorizationRequest object once it is created.
AuthorizationRequest authorizationRequest = getOAuth2RequestFactory().createAuthorizationRequest(parameters);
Set<String> responseTypes = authorizationRequest.getResponseTypes();
if (!responseTypes.contains("token") && !responseTypes.contains("code")) {
throw new UnsupportedResponseTypeException("Unsupported response types: " + responseTypes);
}
if (authorizationRequest.getClientId() == null) {
throw new InvalidClientException("A client id must be provided");
}
try {
if (!(principal instanceof Authentication) || !((Authentication) principal).isAuthenticated()) {
throw new InsufficientAuthenticationException(
"User must be authenticated with Spring Security before authorization can be completed.");
}
ClientDetails client = getClientDetailsService().loadClientByClientId(authorizationRequest.getClientId());
// The resolved redirect URI is either the redirect_uri from the parameters or the one from
// clientDetails. Either way we need to store it on the AuthorizationRequest.
String redirectUriParameter = authorizationRequest.getRequestParameters().get(OAuth2Utils.REDIRECT_URI);
String resolvedRedirect = redirectResolver.resolveRedirect(redirectUriParameter, client);
if (!StringUtils.hasText(resolvedRedirect)) {
throw new RedirectMismatchException(
"A redirectUri must be either supplied or preconfigured in the ClientDetails");
}
authorizationRequest.setRedirectUri(resolvedRedirect);
// We intentionally only validate the parameters requested by the client (ignoring any data that may have
// been added to the request by the manager).
oauth2RequestValidator.validateScope(authorizationRequest, client);
// Some systems may allow for approval decisions to be remembered or approved by default. Check for
// such logic here, and set the approved flag on the authorization request accordingly.
authorizationRequest = userApprovalHandler.checkForPreApproval(authorizationRequest,
(Authentication) principal);
// TODO: is this call necessary?
boolean approved = userApprovalHandler.isApproved(authorizationRequest, (Authentication) principal);
authorizationRequest.setApproved(approved);
// Validation is all done, so we can check for auto approval...
if (authorizationRequest.isApproved()) {
if (responseTypes.contains("token")) {
return getImplicitGrantResponse(authorizationRequest);
}
if (responseTypes.contains("code")) {
return new ModelAndView(getAuthorizationCodeResponse(authorizationRequest,
(Authentication) principal));
}
}
// Place auth request into the model so that it is stored in the session
// for approveOrDeny to use. That way we make sure that auth request comes from the session,
// so any auth request parameters passed to approveOrDeny will be ignored and retrieved from the session.
model.put("authorizationRequest", authorizationRequest);
return getUserApprovalPageResponse(model, authorizationRequest, (Authentication) principal);
}
catch (RuntimeException e) {
sessionStatus.setComplete();
throw e;
}
}
private OAuth2AccessToken getAccessTokenForImplicitGrant(TokenRequest tokenRequest,
OAuth2Request storedOAuth2Request) {
OAuth2AccessToken accessToken = null;
// These 1 method calls have to be atomic, otherwise the ImplicitGrantService can have a race condition where
// one thread removes the token request before another has a chance to redeem it.
synchronized (this.implicitLock) {
accessToken = getTokenGranter().grant("implicit",
new ImplicitTokenRequest(tokenRequest, storedOAuth2Request));
}
return accessToken;
}
.
.
.
I have also instructed the framework to change the mappring from /oauth/authorize to /custom/oauth/authorize:
#Override
public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
endpoints.authenticationManager(authenticationManager).tokenStore(tokenStore())
.accessTokenConverter(tokenEnhancer()).pathMapping("/oauth/authorize", "/custom/authorize/");
}
but when I run the code I encounter the following error:
Description:
Field tokenGranter in com.example.demo.controller.AuthorizationEndpointCustom required a bean of type 'org.springframework.security.oauth2.provider.TokenGranter' that could not be found.
The injection point has the following annotations:
- #org.springframework.beans.factory.annotation.Autowired(required=true)
Action:
Consider defining a bean of type 'org.springframework.security.oauth2.provider.TokenGranter' in your configuration.
the parent class of AuthorizationEndpoint (AbstractEndpoint) declares tokenGranter but it is not instantiated. there is no #autowired for this and other attributes of this class. who does genereate and inject these variable into this class?
how can I get hold of tokenGranter obj and inject it?
/*
* Copyright 2002-2011 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.security.oauth2.provider.endpoint;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.security.oauth2.provider.OAuth2RequestFactory;
import org.springframework.security.oauth2.provider.ClientDetailsService;
import org.springframework.security.oauth2.provider.TokenGranter;
import org.springframework.security.oauth2.provider.error.DefaultWebResponseExceptionTranslator;
import org.springframework.security.oauth2.provider.error.WebResponseExceptionTranslator;
import org.springframework.security.oauth2.provider.request.DefaultOAuth2RequestFactory;
import org.springframework.util.Assert;
/**
* #author Dave Syer
*
*/
public class AbstractEndpoint implements InitializingBean {
protected final Log logger = LogFactory.getLog(getClass());
private WebResponseExceptionTranslator providerExceptionHandler = new DefaultWebResponseExceptionTranslator();
private TokenGranter tokenGranter;
private ClientDetailsService clientDetailsService;
private OAuth2RequestFactory oAuth2RequestFactory;
private OAuth2RequestFactory defaultOAuth2RequestFactory;
public void afterPropertiesSet() throws Exception {
Assert.state(tokenGranter != null, "TokenGranter must be provided");
Assert.state(clientDetailsService != null, "ClientDetailsService must be provided");
defaultOAuth2RequestFactory = new DefaultOAuth2RequestFactory(getClientDetailsService());
if (oAuth2RequestFactory == null) {
oAuth2RequestFactory = defaultOAuth2RequestFactory;
}
}
public void setProviderExceptionHandler(WebResponseExceptionTranslator providerExceptionHandler) {
this.providerExceptionHandler = providerExceptionHandler;
}
public void setTokenGranter(TokenGranter tokenGranter) {
this.tokenGranter = tokenGranter;
}
protected TokenGranter getTokenGranter() {
return tokenGranter;
}
protected WebResponseExceptionTranslator getExceptionTranslator() {
return providerExceptionHandler;
}
protected OAuth2RequestFactory getOAuth2RequestFactory() {
return oAuth2RequestFactory;
}
protected OAuth2RequestFactory getDefaultOAuth2RequestFactory() {
return defaultOAuth2RequestFactory;
}
public void setOAuth2RequestFactory(OAuth2RequestFactory oAuth2RequestFactory) {
this.oAuth2RequestFactory = oAuth2RequestFactory;
}
protected ClientDetailsService getClientDetailsService() {
return clientDetailsService;
}
public void setClientDetailsService(ClientDetailsService clientDetailsService) {
this.clientDetailsService = clientDetailsService;
}
}
I am answering my own question.
I took a good look at the framework code and I found out that AuthorizationServerEndpointsConfiguration class creates an object of type AuthorizationEndpoint and populates it's attributes and then return this object as a bean.
I managed to solve above mentioned problem with TokenGranter by creating a bean of my new AuthorizationEndpointCustom the same way AuthorizationServerEndpointsConfiguration does. this is the code to do so:
#Autowired
private ClientDetailsService clientDetailsService;
#Autowired
AuthorizationServerEndpointsConfiguration asec;
#Bean
#Order(value = Ordered.HIGHEST_PRECEDENCE)
#Primary
public AuthorizationEndpoint authorizationEndpoint () throws Exception{
AuthorizationEndpointCustom authorizationEndpoint = new AuthorizationEndpointCustom();
FrameworkEndpointHandlerMapping mapping = asec.getEndpointsConfigurer().getFrameworkEndpointHandlerMapping();
authorizationEndpoint.setUserApprovalPage(extractPath(mapping, "/oauth/confirm_access"));
authorizationEndpoint.setProviderExceptionHandler(asec.getEndpointsConfigurer().getExceptionTranslator());
authorizationEndpoint.setErrorPage(extractPath(mapping, "/oauth/error"));
authorizationEndpoint.setTokenGranter(asec.getEndpointsConfigurer().getTokenGranter());
authorizationEndpoint.setClientDetailsService(clientDetailsService);
authorizationEndpoint.setAuthorizationCodeServices(asec.getEndpointsConfigurer().getAuthorizationCodeServices());
authorizationEndpoint.setOAuth2RequestFactory(asec.getEndpointsConfigurer().getOAuth2RequestFactory());
authorizationEndpoint.setOAuth2RequestValidator(asec.getEndpointsConfigurer().getOAuth2RequestValidator());
authorizationEndpoint.setUserApprovalHandler(asec.getEndpointsConfigurer().getUserApprovalHandler());
return authorizationEndpoint;
}
private String extractPath(FrameworkEndpointHandlerMapping mapping, String page) {
String path = mapping.getPath(page);
if (path.contains(":")) {
return path;
}
return "forward:" + path;
}
but this did not result in what I hoped to. the new bean does not replace the bean from framework code. this situation with overriding beans led to another question:
how replace framework beans
buttom line, this is not the way to override the framework endpoints. you can simply create a controller with mappings for these endpoints (e.g /oauth/authorize or /oauth/token). automatically these mappings will get precedence over framework endpoints. for more info refer to spring doc
I have a spring boot application which has the following messages outside the jar/war
/i18n/myApplication/messages/companyA/messages.properties
/i18n/myApplication/messages/companyA/messages_fr_FR.properties
/i18n/myApplication/messages/companyB/messages.properties
/i18n/myApplication/messages/companyB/messages_fr_FR.properties
/i18n/myApplication/messages/companyB/messages_zh_HK.properties
In request header I would get the following
X-Company=CompanyA
Accept-Language=fr-FR
How do I set baseNames dynamically based on the company and locale?
Also for CompanyA I do not want to look for messages in CompanyB for Eg:
if
X-Company=CompanyA
Accept-Language=zh-HK
I should be able to default to en-IN properties.
Any new company that gets added I don't want to make any code changes to support it
I was thinking of extending ReloadableResourceBundleMessageSource
In order for our application to be able to determine which locale is currently being used, we need to add a LocaleResolverbean:
`
#Bean
public LocaleResolver localeResolver() {
SessionLocaleResolver slr = new SessionLocaleResolver();
slr.setDefaultLocale(Locale.US);
return slr;
}
`
The LocaleResolver interface has implementations that determine the current locale based on the session, cookies, the Accept-Language header, or a fixed value.
Next, we need to add an interceptor bean that will switch to a new locale based on the value of the lang parameter appended to a request:
`
#Bean
public LocaleChangeInterceptor localeChangeInterceptor() {
LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
lci.setParamName("lang");
return lci;
}
`
In order to take effect, this bean needs to be added to the application’s interceptor registry.
To achieve this, our #Configuration class has to implement the WebMvcConfigurer interface and override the addInterceptors() method:
`
#Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(localeChangeInterceptor());
}
`
It you read the documentation giù will find the simplest example Accept-language header which perfectly fits your needs
Sample spring configuration is as below.
<int-mail:imap-idle-channel-adapter id="mailAdapter"
store-uri="imaps://${"username"}:${"password"}#imap-server:993/INBOX"
java-mail-properties="javaMailProperties"
channel="emails"
should-delete-messages="false"
should-mark-messages-as-read="true">
</int-mail:imap-idle-channel-adapter>
I wish to keep the password field encrypted in properties file and decrypt it in the code. I am not sure on how to set mailReceiver property of ImapIdleChannelAdapter to my custom version of ImapMailReceiver.
Please let me know if there is any way to do this.
All of my configurations are in XML as described above.
Above solution of adding the defifnation did not work may be I am doing something wrong. Then I tried using XML + Java configuration, as below.
#Configuration
public class EmailConfiguration {
#Bean
public ImapIdleChannelAdapter customAdapter() {
ImapIdleChannelAdapter adapter = new ImapIdleChannelAdapter(mailReceiver());
adapter.setOutputChannel(outputChannel());
adapter.setErrorChannel(errorChannel());
adapter.setAutoStartup(true);
adapter.setShouldReconnectAutomatically(true);
adapter.setTaskScheduler(taskScheduler());
return adapter;
}
#Bean
public TaskImapMailReceiver mailReceiver() {
TaskImapMailReceiver mailReceiver = new TaskImapMailReceiver("imaps://[username]:[password]#imap.googlemail.com:993/inbox");
mailReceiver.setShouldDeleteMessages(false);
mailReceiver.setShouldMarkMessagesAsRead(true);
//mailReceiver.setJavaMailProperties(javaMailProperties());
mailReceiver.setMaxFetchSize(Integer.MAX_VALUE);
return mailReceiver;
}
}
Also created empty errorChannel,outputChannel etc. I observed that Spring creates two instances one with xml config and other with java #Configuration. Where it was expected to use only java configuration. If I remove the xml config tag
then it provides sigle imap instance with my mailReceiver but runs only once does not go periodic. also does not show IMAPS logs.
Just wondering if I need to do so much to encrypt the password. Is somthing wrong with my approach.
Use Java configuration instead of XML...
#Configuration
public class MyConfigClass {
#Bean
public MyMailReceiver receiver() {
...
}
#Bean
public ImapIdleChannelAdapter adapter() {
ImapIdleChannelAdapter adapter = new ImapIdleChannelAdapter(receiver());
...
return adapter;
}
}
If you are using XML for everything else, simply add this class as a <bean/> to your XML.
EDIT
Here's an example that works fine for me...
#SpringBootApplication
public class So42298254Application {
public static void main(String[] args) {
SpringApplication.run(So42298254Application.class, args);
}
#Bean
public TestMailServer.ImapServer imapServer() {
return TestMailServer.imap(0);
}
#Bean
public ImapMailReceiver receiver() {
ImapMailReceiver imapMailReceiver = new ImapMailReceiver(imapUrl("user", "pw"));
imapMailReceiver.setHeaderMapper(new DefaultMailHeaderMapper()); // converts the MimeMessage to a String
imapMailReceiver.setUserFlag("testSIUserFlag"); // needed by the SI test server
Properties javaMailProperties = new Properties();
javaMailProperties.put("mail.debug", "true");
imapMailReceiver.setJavaMailProperties(javaMailProperties);
return imapMailReceiver;
}
private String imapUrl(String user, String pw) {
return "imap://"
+ user + ":" + pw
+ "#localhost:" + imapServer().getPort() + "/INBOX";
}
#Bean
public ImapIdleChannelAdapter adapter() {
ImapIdleChannelAdapter adapter = new ImapIdleChannelAdapter(receiver());
adapter.setOutputChannelName("handleMail");
return adapter;
}
#ServiceActivator(inputChannel = "handleMail")
public void handle(String mail, #Header(MailHeaders.FROM) Object from) {
System.out.println(mail + " from:" + from);
imapServer().resetServer(); // so we'll get the email again
}
}
My intention was to use encrypted passwords in properties files.
So I changed my approach of getting into email receiving classes. I added inherited PropertyPlaceholderConfigurer and implemented method convertPropertyValue() as below.
public class EncryptationAwarePropertyPlaceholderConfigurer extends PropertyPlaceholderConfigurer {
private static final Logger logger = LoggerFactory.getLogger(EncryptationAwarePropertyPlaceholderConfigurer.class);
#Override
protected String convertPropertyValue(String originalValue) {
if (originalValue.contains("{<ENC>}") && originalValue.contains("{</ENC>}")) {
String encryptedTaggedValue = originalValue.substring(originalValue.indexOf("{<ENC>}"), originalValue.indexOf("{</ENC>}") + 8);
String encryptedValue = originalValue.substring(originalValue.indexOf("{<ENC>}") + 7, originalValue.indexOf("{</ENC>}"));
try {
String decryptedValue = EncrypDecriptUtil.decrypt(encryptedValue);//EncrypDecriptUtil is my class for encription and decryption
originalValue = originalValue.replace(encryptedTaggedValue, decryptedValue);
} catch (GeneralSecurityException e) {
logger.error("failed to decrypt property returning original value as in properties file.", e);
}
}
return originalValue;
}
}
And changed properties file to enclose encrypted value in custuom ENC tag
as
mail.imap.task.url=imap://username:{<ENC>}encryptedPassword{</ENC>}#imap.googlemail.com:993/inbox
I am trying to implement re-routing of dead-lettered messages as described in this answer. I am using Spring config. I have no idea on how to read the headers to get the original routing key and original queue. The following is my config:
#Configuration
public class NotifEngineRabbitMQConfig {
#Bean
public MessageHandler handler(){
return new MessageHandler();
}
#Bean
public Jackson2JsonMessageConverter messageConverter(){
return new Jackson2JsonMessageConverter();
}
#Bean
public MessageListenerAdapter messageListenerAdapter(){
return new MessageListenerAdapter(handler(), messageConverter());
}
/**
* Listens for incoming messages
* Allows multiple queue to listen to
* */
#Bean
public SimpleMessageListenerContainer simpleMessageListenerContainer(){
SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
container.addQueueNames(QUEUE_TO_LISTEN_TO.split(","));
container.setMessageListener(messageListenerAdapter());
container.setConnectionFactory(rabbitConnectionFactory());
container.setDefaultRequeueRejected(false);
return container;
}
#Bean
public ConnectionFactory rabbitConnectionFactory(){
CachingConnectionFactory factory = new CachingConnectionFactory(HOST);
factory.setUsername(USERNAME);
factory.setPassword(PASSWORD);
return factory;
}
}
The headers are not available using "old" style Pojo messaging (with a MessageListenerAdapter). You need to implement MessageListener which gives you access to the headers.
However, you will need to invoke the converter yourself in that case and, if you are using request/reply messaging, you lose the reply mechanism within the adapter and you have to send the reply yourself.
Alternatively, you can use a custom message converter and "enhance" the converted object with the header after invoking the standard converter.
Consider instead using the newer style POJO messaging with #RabbitListener - it gives you access to the headers and has request/reply capability.
Here's an example:
#SpringBootApplication
public class So37581560Application {
public static void main(String[] args) {
SpringApplication.run(So37581560Application.class, args);
}
#Bean
public FooListener fooListener() {
return new FooListener();
}
public static class FooListener {
#RabbitListener(queues="foo")
public void pojoListener(String body,
#Header(required = false, name = "x-death") List<String> xDeath) {
System.out.println(body + ":" + (xDeath == null ? "" : xDeath));
}
}
}
Result:
Foo:[{reason=expired, count=1, exchange=, time=Thu Jun 02 08:44:19 EDT 2016, routing-keys=[bar], queue=bar}]
Gary's answer is the right one. Just a little detail, the type of xDeath is better to be ArrayList<HashMap<String,*>> instead List<String> xDeath. Then you can access any field by doing something like: xDeath.first().get("count")
Has anyone had any luck constructing a PropertySource that uses a remote source (for example a database) from which to retrieve property values. The idea would be to construct a PropertySource (needs some connection information such as host/port) and plug that into a PropertySourcePlaceholderConfigurer.
The problem seems to be a chicken and egg problem. How can I get the connection information down to the PropertySource? I could first instantiate the PropertySourcePlaceholderConfigurer with configuration to load a property file with the remote host and port properties and then later instantiate the PropertySource and inject that back into the configurer. However, I can't seem to figure a way to ensure that the very first bean to be instantiated (and quickly injected into the configurer) is my property source. I need to have this because, of course, all my other beans depend on the remote properties.
Commons Configuration supports loading properties from a variety of sources (including JDBC Datasources) into a org.apache.commons.configuration.Configuration object via a org.apache.commons.configuration.ConfigurationBuilder.
Using the org.apache.commons.configuration.ConfiguratorConverter, you can convert the Configuration object into a java.util.Properties object which can be passed to the PropertySourcesPlaceholderConfigurer.
As to the chicken and egg question of how to configure the ConfigurationBuilder, I recommend using the org.springframework.core.env.Environment to query for system properties, command-line properties or JNDI properties.
In this exampe:
#Configuration
public class RemotePropertyConfig {
#Bean
public static PropertySourcesPlaceholderConfigurer propertyPlaceholderConfigurer(Environment environment)
throws Exception {
final PropertySourcesPlaceholderConfigurer props = new PropertySourcesPlaceholderConfigurer();
final ConfigurationBuilder configurationBuilder = new DefaultConfigurationBuilder(environment.getProperty("configuration.definition.file"));
props.setProperties(ConfigurationConverter.getProperties(configurationBuilder.getConfiguration()));
return props;
}
You will need to specify the environment property configuration.definition.file which points to a file needed to configure Commons Configuration:
Similar to Recardo's answer above, I used Spring's PropertiesLoaderUtils instead of Apache's, but it amounts to the same thing. It's not exactly ideal.. hard coded dependency injection, but hey, it works!
/**
* This method must remain static as it's part of spring's initialization effort.
* #return
**/
#Bean
public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
String dbHost = null;
Integer dbPort = null;
// check system / environment properties first
Environment environment = new StandardEnvironment();
if (environment.containsProperty(DB_HOST_KEY)) {
dbHost = environment.getProperty(DB_HOST_KEY);
}
if (environment.containsProperty(DB_PORT_KEY)) {
dbPort = Integer.valueOf(environment.getProperty(DB_PORT_KEY));
}
if (dbHost == null || dbPort == null) {
// ok one or (probably) both properties null, let's go find the database.properties file
Properties dbProperties;
try {
dbProperties = PropertiesLoaderUtils.loadProperties(new EncodedResource(new ClassPathResource("database.properties"), "UTF-8"));
}
catch (IOException e) {
throw new RuntimeException("Could not load database.properties. Please confirm the file is in the classpath");
}
if (dbHost == null) {
dbHost = dbProperties.getProperty(DB_HOST_KEY);
}
if (dbPort == null) {
dbPort = Integer.valueOf(dbProperties.getProperty(DB_PORT_KEY));
}
}
PropertySourceService propertySourceService = new DBPropertySourceService(dbHost, dbPort);
PropertySource<PropertySourceService> propertySource = new DBPropertySource(propertySourceService);
MutablePropertySources propertySources = new MutablePropertySources();
propertySources.addFirst(propertySource);
configurer.setPropertySources(propertySources);
return configurer;
}
per request, here is the source of the remote property source. It depends on a 'service' class that might do.. well.. anything.. remote access of a property over a socket, talk to a database, whatever.
/**
* Property source for use with spring's PropertySourcesPlaceholderConfigurer where the source is a service
* that connects to remote server for property values.
**/
public class RemotePropertySource extends PropertySource<PropertySourceService> {
private final Environment environment;
/**
* Constructor...
* #param name
* #param source
**/
public RemotePropertySource(PropertySourceService source) {
super("RemotePropertySource", source);
environment = new StandardEnvironment();
}
/* (non-Javadoc)
* #see org.springframework.core.env.PropertySource#getProperty(java.lang.String)
*/
#Override
public Object getProperty(String name) {
// check system / environment properties first
String value;
if (environment.containsProperty(name)) {
value = environment.getProperty(name);
}
else {
value = source.getProperty(name);
}
return value;
}
}