I want to read application.properties using
#EnableConfigurationProperties and #ConfigurationProperties.
I am able to do that with the following codes:
Application.java
#SpringBootApplication
#EnableConfigurationProperties(ApplicationConfiguration.class)
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
ApplicationConfiguration.java
#ConfigurationProperties(prefix = "server")
public class ApplicationConfiguration {
private String port;
public String getPort() {
return port;
}
public void setPort(String port) {
this.port = port;
}
}
TestController.java
#Controller
public class TestController {
#Autowired
ApplicationConfiguration applicationConfiguration;
#RequestMapping("/test")
#ResponseBody
public String test() {
if (applicationConfiguration != null) {
return applicationConfiguration.getPort();
}
return "1";
}
}
application.properties
server.port = 8085
Now I want to replace SpringBoot(Application.java) with WebApplicationInitializer so that I can use an external container. Here is my code:
CommonInitializer.java
public class CommonInitializer implements WebApplicationInitializer{
#Override
public void onStartup(ServletContext servletContext) throws ServletException {
AnnotationConfigWebApplicationContext annotationConfigWebApplicationContext = new AnnotationConfigWebApplicationContext();
annotationConfigWebApplicationContext.register(WebConfiguration.class);
annotationConfigWebApplicationContext.setServletContext(servletContext);
ServletRegistration.Dynamic servlet = servletContext.addServlet("dispatcher", new DispatcherServlet(annotationConfigWebApplicationContext));
servlet.setLoadOnStartup(1);
servlet.addMapping("/");
}
}
WebConfiguration.java
#Configuration
#EnableWebMvc
#ComponentScan(basePackages = "hello")
#EnableAutoConfiguration
#EnableConfigurationProperties(ApplicationConfiguration.class)
public class WebConfiguration {
#Bean
public ViewResolver viewResolver() {
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setViewClass(JstlView.class);
viewResolver.setPrefix("/WEB-INF/views/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
}
After doing this, I am not able to get the port(port is null, applicationConfiguration is not null) in application.proerties. Any idea? What am I missing?
Problem solved. I am missing property file location!!
#ConfigurationProperties(prefix = "server", locations = "classpath:application.properties")
Seems spring boot does that for you automatically.
Related
I have servlet whose load on startup property is '1', in this servlet I have to cache database entries during the application server startup.
In this servlet I am calling the CacheService which retrieves the db objects, its annotated with #Autowired annoatation, during the application startup the CacheService object is null.I have annotated the CacheService with #Service annotation. The #Autowired annotation is not working.
#Service
public class CacheService {
#Autowired
private IJobsService jobsServiceImpl;
public List<Jobs> getALLJobs(){
List<Jobs> alljobs = jobsServiceImpl.findAllJobs();
return alljobs;
}
}
public class StartupServlet extends HttpServlet {
#Autowired
private CacheService cacheService; -- object is null not autowired
}
Below is the main class
#EnableCaching
#EnableJpaRepositories(basePackages = {"com.example.demo.repository"})
#EntityScan(basePackages = {"com.example.demo.entity"})
#SpringBootApplication
#ComponentScan(basePackages={"com.example.demo"})
#EnableAutoConfiguration(exclude = {
org.springframework.boot.autoconfigure.security.SecurityAutoConfiguration.class,
org.springframework.boot.actuate.autoconfigure.ManagementWebSecurityAutoConfiguration.class})
public class DemoApplication extends SpringBootServletInitializer implements WebApplicationInitializer{
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
#Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(DemoApplication.class);
}
#Bean
ServletRegistrationBean myServletRegistration () {
ServletRegistrationBean srb = new ServletRegistrationBean();
srb.setServlet(new StartupServlet());
srb.setUrlMappings(Arrays.asList("/path2/*"));
srb.setLoadOnStartup(1);
return srb;
}
}
Could some body help me on this...?
You should do some additional work for this. You have to talk to beanFactory-like spring component and ask it to make that particular instance an eligible bean. AutowireCapableBeanFactory should do the trick.
Here is a simple example based on code you have provided
#SpringBootApplication
public class So44734879Application {
public static void main(String[] args) {
SpringApplication.run(So44734879Application.class, args);
}
#Autowired
AutowireCapableBeanFactory beanFactory;
#Bean
ServletRegistrationBean myServletRegistration() {
ServletRegistrationBean srb = new ServletRegistrationBean();
final StartupServlet servlet = new StartupServlet();
beanFactory.autowireBean(servlet); // <--- The most important part
srb.setServlet(servlet);
srb.setUrlMappings(Arrays.asList("/path2/*"));
srb.setLoadOnStartup(1);
return srb;
}
#Bean
MyService myService() {
return new MyService();
}
public static class MyService {
String time() {
return "Time: " + System.currentTimeMillis();
}
}
public static class StartupServlet extends HttpServlet {
#Autowired
MyService myService;
#Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
final PrintWriter writer = resp.getWriter();
writer.write(myService.time());
writer.close();
}
}
}
=>
$ curl -XGET localhost:8080/path2
Time: 1498299772141%
You're creating the servlet by using new so you need to provide its dependencies. Since you're using a mix of annotation and java code configuration you can accomplish it like this:
public class StartupServlet extends HttpServlet {
private CacheService cacheService;
public StartupServlet(CacheService cacheService) {
this.cacheService = cacheService;
}
// ... rest of servlet
}
Main class:
#Bean
ServletRegistrationBean myServletRegistration (CacheService cacheService) { // <<<--- cacheService will be provided here by Spring because it's annotated
ServletRegistrationBean srb = new ServletRegistrationBean();
srb.setServlet(new StartupServlet(cacheService));
srb.setUrlMappings(Arrays.asList("/path2/*"));
srb.setLoadOnStartup(1);
return srb;
}
I am new to spring and am working on a rest service written using Spring and Apache CXF with Java Configurations. I have the following rest service.
#Path("/release/")
#Component
#RestService
#Consumes({ MediaType.APPLICATION_JSON })
#Produces({ MediaType.APPLICATION_JSON })
#Scope(proxyMode = ScopedProxyMode.TARGET_CLASS)
public class ReleaseResource extends AbstractService implements IResource {
#Override
#CustomLogger
#GET
public Response get() {
//Some Logic
return Response.ok("Success!!").build();
}
}
I have created an aspect using #AspectJ for logging. However, the aspect is not working on the services written in CXF. I did a bit of searching in net and found that Spring needs proxy beans for the aspects to work. Then I tried few approaches such as
Making the service class implement an interface
Using CGLIB library and scope proxy mode TARGET_CLASS
Extending a class with method
#Override
public void setMessageContext(MessageContext context) {
this.context = context;
}
But none of them worked.
Any idea if it is possible to run the aspect around the services?
If yes, can someone please tell me how to.
I have read that this can be achieved by bytecode weaving the aspectj manually instead of using spring aspectj autoproxy (not sure how to do it though). Can someone tell me if this is a good option and how to do it?
EDIT:
Sorry for the incomplete info provided. Attaching the other classes
#Aspect
#Configuration
public class LoggerAspect {
#Pointcut(value = "execution(* *(..))")
public void anyPublicMethod() {
}
#Around("anyPublicMethod() && #annotation(CustomLogger)")
public Object logAction(ProceedingJoinPoint pjp, CustomLogger customLogger) throws Throwable {
//Log Some Info
return pjp.proceed();
}
}
Web Initializer class:
#Configuration
public class WebInitializer implements WebApplicationInitializer {
#Override
public void onStartup(ServletContext servletContext) throws ServletException {
servletContext.addListener(new ContextLoaderListener(createWebAppContext()));
addApacheCxfServlet(servletContext);
}
private void addApacheCxfServlet(ServletContext servletContext) {
CXFServlet cxfServlet = new CXFServlet();
ServletRegistration.Dynamic appServlet = servletContext.addServlet("CXFServlet", cxfServlet);
appServlet.setLoadOnStartup(1);
appServlet.addMapping("/*");
}
private WebApplicationContext createWebAppContext() {
AnnotationConfigWebApplicationContext appContext = new AnnotationConfigWebApplicationContext();
appContext.register(TestConfig.class);
return appContext;
}
}
Config Class:
#Configuration
#ComponentScan(basePackages = "com.my.package")
#EnableAspectJAutoProxy(proxyTargetClass = true)
public class TestConfig {
private static final String RESOURCES_PACKAGE = "com.my.package";
#ApplicationPath("/")
public class JaxRsApiApplication extends Application {
}
#Bean(destroyMethod = "shutdown")
public SpringBus cxf() {
return new SpringBus();
}
#Bean
public JacksonJsonProvider jacksonJsonProvider() {
return new JacksonJsonProvider();
}
#Bean
public LoggerAspect getLoggerAspect() {
return new LoggerAspect();
}
#Bean
IResource getReleaseResource() {
return new ReleaseResource();
}
#Bean
#DependsOn("cxf")
public Server jaxRsServer(ApplicationContext appContext) {
JAXRSServerFactoryBean factory = RuntimeDelegate.getInstance().createEndpoint(jaxRsApiApplication(),
JAXRSServerFactoryBean.class);
factory.setServiceBeans(restServiceList(appContext));
factory.setProvider(jacksonJsonProvider());
return factory.create();
}
private List<Object> restServiceList(ApplicationContext appContext) {
return RestServiceBeanScanner.scan(appContext, TestConfig.RESOURCES_PACKAGE);
}
#Bean
public JaxRsApiApplication jaxRsApiApplication() {
return new JaxRsApiApplication();
}
}
RestServiceBeanScanner class
public final class RestServiceBeanScanner {
private RestServiceBeanScanner() {
}
public static List<Object> scan(ApplicationContext applicationContext, String... basePackages) {
GenericApplicationContext genericAppContext = new GenericApplicationContext();
ClassPathBeanDefinitionScanner scanner = new ClassPathBeanDefinitionScanner(genericAppContext, false);
scanner.addIncludeFilter(new AnnotationTypeFilter(RestService.class));
scanner.scan(basePackages);
genericAppContext.setParent(applicationContext);
genericAppContext.refresh();
List<Object> restResources = new ArrayList<>(
genericAppContext.getBeansWithAnnotation(RestService.class).values());
return restResources;
}
}
I used #ComponentScan on the Application class and use the #Configuration on my config class, in my config class, I want to inject beans defined in other config class by using #Autowired annotation, but when I run the application, I got null for these fields.
#Configuration
public class AConfiguration {
#Bean
public A getA(){
return ..;
}
}
#Configuration
public class BConfiguration {
#Autowired
private A a;
#Bean
public B getB() {
**something need a, but a is null**
}
}
#EnableCaching
#Configuration
public class EhcacheConfiguration extends CachingConfigurerSupport {
#Bean
#Override
public CacheManager cacheManager() {
return new EhCacheCacheManager(ehCacheCacheManager().getObject());
}
#Bean
public EhCacheManagerFactoryBean ehCacheCacheManager() {
EhCacheManagerFactoryBean cmfb = new EhCacheManagerFactoryBean();
cmfb.setConfigLocation(new ClassPathResource("ehcache.xml"));
cmfb.setShared(true);
return cmfb;
}
}
#Configuration
#DependsOn("ehcacheConfiguration")
public class ShiroConfiguration {
#Autowired
private org.springframework.cache.CacheManager cacheManager;
}
#SpringBootApplication
#EnableTransactionManagement
public class JarApplication {
public static void main(String[] args) {
SpringApplication.run(JarApplication.class, args);
}
}
You can try this.
#Configuration
public class AConfiguration {
#Bean
public A getA(){
return ..;
}
}
#Configuration
public class BConfiguration {
#Autowired
private A a;
public B getB() {
**something need a, but a is null**
}
}
How can I register a custom converter in my MongoTemplate with Spring Boot? I would like to do this only using annotations if possible.
I just register the bean:
#Bean
public MongoCustomConversions mongoCustomConversions() {
List list = new ArrayList<>();
list.add(myNewConverter());
return new MongoCustomConversions(list);
}
Here is a place in source code where I find it
If you only want to override the custom converters portion of the Spring Boot configuration, you only need to create a configuration class that provides a #Bean for the custom converters. This is handy if you don't want to override all of the other Mongo settings (URI, database name, host, port, etc.) that Spring Boot has wired in for you from your application.properties file.
#Configuration
public class MongoConfig
{
#Bean
public CustomConversions customConversions()
{
List<Converter<?, ?>> converterList = new ArrayList<Converter<?, ?>>();
converterList.add(new MyCustomWriterConverter());
return new CustomConversions(converterList);
}
}
This will also only work if you've enabled AutoConfiguration and excluded the DataSourceAutoConfig:
#SpringBootApplication(scanBasePackages = {"com.mypackage"})
#EnableMongoRepositories(basePackages = {"com.mypackage.repository"})
#EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class})
public class MyApplication
{
public static void main(String[] args)
{
SpringApplication.run(MyApplication.class, args);
}
}
In this case, I'm setting a URI in the application.properties file and using Spring data repositories:
#mongodb settings
spring.data.mongodb.uri=mongodb://localhost:27017/mydatabase
spring.data.mongodb.repositories.enabled=true
You need to create a configuration class for converter config.
#Configuration
#EnableAutoConfiguration(exclude = { EmbeddedMongoAutoConfiguration.class })
#Profile("!testing")
public class MongoConfig extends AbstractMongoConfiguration {
#Value("${spring.data.mongodb.host}") //if it is stored in application.yml, else hard code it here
private String host;
#Value("${spring.data.mongodb.port}")
private Integer port;
#Override
protected String getDatabaseName() {
return "test";
}
#Bean
public Mongo mongo() throws Exception {
return new MongoClient(host, port);
}
#Override
public String getMappingBasePackage() {
return "com.base.package";
}
#Override
public CustomConversions customConversions() {
List<Converter<?, ?>> converters = new ArrayList<>();
converters.add(new LongToDateTimeConverter());
return new CustomConversions(converters);
}
}
#ReadingConverter
static class LongToDateTimeConverter implements Converter<Long, Date> {
#Override
public Date convert(Long source) {
if (source == null) {
return null;
}
return new Date(source);
}
}
I have the following sftp camel component configuration:
#Configuration
public class FtpCamelComponent {
#Value("${SFTP_HOST}")
private String sftpHost;
#Value("${SFTP_KNOWNHOST}")
private String sftpKnownHost;
#Value("${SFTP_KEY}")
private String sftpKey;
#Value("${SFTP_USER}")
private String sftpUser;
#Value("{SFTP_DIRECTORY}")
private String sftpFileDirectory;
#Bean
public SftpConfiguration sftpConfiguration(){
SftpConfiguration sftpConfiguration = new SftpConfiguration();
sftpConfiguration.setUsername(sftpUser);
sftpConfiguration.setHost(sftpHost);
sftpConfiguration.setKnownHostsFile(sftpKnownHost);
sftpConfiguration.setPrivateKeyFile(sftpKey);
sftpConfiguration.setDirectory(sftpFileDirectory);
return sftpConfiguration;
}
#Bean
public SftpEndpoint sftpEndpoint(SftpConfiguration sftpConfiguration){
SftpEndpoint sftpEndpoint = new SftpEndpoint();
sftpEndpoint.setConfiguration(sftpConfiguration);
sftpEndpoint.setEndpointUriIfNotSpecified("sftp");
return sftpEndpoint;
}
#Bean
public SftpComponent sftpComponent(SftpEndpoint sftpEndpoint){
SftpComponent sftpComponent = new SftpComponent();
sftpComponent.setEndpointClass(sftpEndpoint.getClass());
return sftpComponent;
}
}
I added the component to my camel context:
#Configuration
#Import({FtpCamelComponent.class,
SftpCamelRoute.class})
public class SftpCamelContext extends CamelConfiguration {
#Autowired
SftpComponent sftpComponent;
#Bean(name = "sftpCamelContext")
protected CamelContext createCamelContext() throws Exception {
SpringCamelContext camelContext = new SpringCamelContext();
camelContext.setApplicationContext(getApplicationContext());
camelContext.addComponent("sftp", sftpComponent);
return camelContext;
}
}
Why can't I just use sftp: in my camel route as I have already configured it and added it to my camel context?
#Bean(name = "FileToSftp")
public RouteBuilder fileToSFTP(){
return new RouteBuilder() {
public void configure() {
from("direct:fileToSftp")
.to("file:export/b1?fileName=export.csv")
.setHeader("CamelFileName", constant("export.csv"))
.to("sftp://dev#localhost:/export/in/?knownHostsFile=key/knownhost&privateKeyFile=key/id_rsa.pub&localWorkDirectory=export/b1&download=false");
}
};
}