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Suraj_Kamdi · 10/30/18

I want to fetch the properties in OSgi Service like userName , which is set in request parameter in a my custom SlingServlet ? Anyone has an idea about how to achieve this task ?

I have one RegisterUserSlingServlet class and CustomMailService as OSGi service. I want get some request parameters properties inside my CustomMailService.

chandu_t · 10/30/18

Assuming you call CustomMailService in RegisterUserSlingServlet. You get request parameters in servlet by request.getParameter("key"). You can pass this parameters to the service, while invoking service method.

Suraj_Kamdi · 10/30/18

@chandu t Do you any examples on that ?

Feike_Visser1 · 10/30/18

Indeed, just pass in the request object or individual values

Suraj_Kamdi · 10/30/18

Feike Visser I am still confused..!! Do you have any sample example ?

Feike_Visser1 · 10/30/18

Do you have any code to share?

Suraj_Kamdi · 10/30/18

Feike Visser

Servlet Code

@Component(service = Servlet.class,

property = {Constants.SERVICE_DESCRIPTION + "= Create Profile Servlet",

ServletResolverConstants.SLING_SERVLET_METHODS + "=" + HttpConstants.METHOD_POST,

ServletResolverConstants.SLING_SERVLET_RESOURCE_TYPES + "=" + CreateProfile.RESOURCE_TYPE})

public class CreateProfile extends SlingAllMethodsServlet {

public static final String RESOURCE_TYPE = "components/general/profile";

private static final String targetPageUrl = "/content/smaple.html";

@Reference

private transient AccountManagementService accountManagementService;

@Override

protected void doPost(SlingHttpServletRequest slingRequest,

SlingHttpServletResponse slingResponse) throws ServletException, IOException {

//Want to pass this targetUrl into Service class

slingRequest.setAttribute(targetPageUrl, targetPageUrl );

}

Service Class:

@Component(

name = "Mail Service",

property = {

"label = Mail Service",

"description = Mail Service",

Constants.SERVICE_RANKING + ": Integer = 10000"},

service = MailService.class, immediate = true

)

public class ]MailService implements MessageGateway<Email>, MailService {

/**

* Getting reference for default mail service.

*/

@Reference(

target = "(service.pid=com.day.cq.mailer.DefaultMailService)",

cardinality = ReferenceCardinality.MANDATORY,

policy = ReferencePolicy.DYNAMIC

)

private volatile MailService defaultMailService;

@Activate

protected void activate(ComponentContext componentContext) {

log.info("Activated Fiserv Default Mail Service");

}

@Override

public boolean handles(Class<? extends Email> type) {

return true;

}

@Override

public void send(Email email) throws MailingException {

//Here I want to Fetch the Request Parameter From Servlet Class.

}

@Override

public void sendEmail(Email email) throws EmailException {

send(email);

}

chandu_t · 10/30/18

Looks like you trying to add request parameters to mail body. Below is sample code

@Reference

private MailService mailService;

@Override

protected void doPost(SlingHttpServletRequest slingRequest,

SlingHttpServletResponse slingResponse) throws ServletException, IOException {

Email email = new SimpleEmail();

StringBuilder mailTemplate = new StringBuilder();

mailTemplate.append("<!DOCTYPE html><html><body>");

mailTemplate.append("url: " + request.getParameter("targetUrl"));

// you can add other parameters into body

mailTemplate.append("</table></body></html>");

email.setContent(mailTemplate.toString(), "text/html");

email.setSubject("Register User");

email.addTo(request.getParameter("email"));

mailService.send(email);

}

Suraj_Kamdi · 10/30/18

@chandu t I dont want to append parameter in servlet. I only need to fetch that parameter in osgi service. I have to check some certain logic and based on that i have to append the targetUrl

chandu_t · 10/30/18

Then create a custom method in service. And call it.

public void send(Email email, String targetUrl) throws MailingException {

//Here use targetUrl for condition

}

Add call like below in servlet

mailService.send(email, request.getParameter("targetUrl"));

Suraj_Kamdi · 10/30/18

chandu t But

@Override

public void send(Email email) throws MailingException {} is an interface method

Lokesh_Shivalingaiah · 11/1/18

surajk96205881,

write a overload send() method in your custom service which accepts the request parameter and then put your logic.

Suraj_Kamdi · 11/6/18

Do you have any proper example which describes the above scenario ?

smacdonald2008 · 10/30/18

You cannot read a servlet parameter value (value passed to a servlet) from an OSGI service. You can however - pass a servlet parameter from a servlet to a service method.

smacdonald2008 · 10/30/18

In your code - looks like you are writing an OSGI class that implements MessageGatewayService.

This is not necessary to use a MessageGatewayService.

Instead - write an OSGi class that implements a Java interface. Then in your implementation class - inject a MessageGatewayService.

That is - no need to write a class that does this

@Component(

name = "Mail Service",

property = {

"label = Mail Service",

"description = Mail Service",

Constants.SERVICE_RANKING + ": Integer = 10000"},

service = MailService.class, immediate = true

)

public class MailService implements MessageGateway<Email>, MailService {

Do this --

public interface Foo(){

public void sendMail(String parVal1)

}

@Component

public class FooImpl implements Foo

{

//Inject a MessageGatewayService

@Reference

private MessageGatewayService messageGatewayService;

public void sendMail(String parVal1){

//parVal1 is my Servlet value!

//Call methods now that belong to messageGatewayService

}

Now in your Servlet - you can call sendMail() and pass servlet value by

@Reference

private Foo myFoo;

protected void doPost(SlingHttpServletRequest slingRequest, SlingHttpServletResponse slingResponse) throws ServletException, IOException {

//Read Servlet parm values in Servlet

myFoo.sendMail(<PASS SERVLET VALUE>) ; // This is how you solve this use case.

...

}

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How to get request parameter of SlingServlet in OSGi Service ?

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