How to inject JmsTemplate object using annotations in a spring class?

I am trying to inject a JmsTemplate object into a class using @Autowired, but it is giving a NullPointerException whenever I try to send messages. While in the application class I could instantiate jmsTemplate using the ApplicationContext

ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);
JmsTemplate jmsTemplate = context.getBean(JmsTemplate.class);

I could not do this in any other class, as I did not figure out how to get the context object.

This is my application class:

@EnableAutoConfiguration
public class Application {

  private static final String maxFileSize = "512KB";
  private static final String maxRequestSize = "512KB";

  static String IncomingMailboxDestination = "Responses";

  @Bean
  Receiver receiver() {
    return new Receiver();
  }

  @Bean
  Producer producer() {
    return new Producer();
  }

  @Bean
  MessageListenerAdapter adapter(Receiver receiver) {
    MessageListenerAdapter messageListener
            = new MessageListenerAdapter(receiver);
    messageListener.setDefaultListenerMethod("receiveMessage");
    return messageListener;
  }

  @Bean
  SimpleMessageListenerContainer container(MessageListenerAdapter messageListener,
                                         ConnectionFactory connectionFactory) {
    SimpleMessageListenerContainer container = new SimpleMessageListenerContainer();
    container.setMessageListener(messageListener);
    container.setConnectionFactory(connectionFactory);
    container.setDestinationName(IncomingMailboxDestination);
    return container;
   }

  @Bean
  MultipartConfigElement multipartConfigElement() {
    MultipartConfigFactory factory = new MultipartConfigFactory();
    factory.setMaxFileSize(maxFileSize);
    factory.setMaxRequestSize(maxRequestSize);
    return factory.createMultipartConfig();
  }

  public static void main(String[] args) {
     // Clean out any ActiveMQ data from a previous run
    FileSystemUtils.deleteRecursively(new File("activemq-data"));

    // Launch the application
    ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);


}
}

and this is the Producer class:

@Component("producer")
public class Producer 
{
  @Autowired   
  @Qualifier("jmsTemplate")
  private JmsTemplate jmsTemplate;
  private static final Logger logger = Logger.getLogger(Producer.class);


  public void convertAndSendMessage(String destination, Message notification) 
  {
    logger.info("sending message : " + notification.getMessage());
    jmsTemplate.convertAndSend(destination, notification);
  }
}

This is the full stack trace:

java.lang.NullPointerException: null
at ncl.jms.Producer.convertAndSendMessage(Producer.java:35)
at ncl.controllers.ModelController.process(ModelController.java:196)
at ncl.controllers.ModelController.process(ModelController.java:202)
at ncl.controllers.ModelController.runModel(ModelController.java:147)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1720)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1679)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:722)

What am I missing here?

Solution

passing the jmsTemplate object from the calling class to he convert and send message in my Producer class has worked. But still don't know why it did not work when I try to instantiate it in the Producer class.