yes exactly ...
package com.mysite.core.servlets;
import javax.servlet.Servlet;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.servlets.HttpConstants;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.osgi.framework.Constants;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import java.util.logging.FileHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.mysite.core.services.HttpService;
/**
*
* This method makes an HTTP call and read the value from the JSON webservice via an OSGi configuration
*
*/
@Component(service = Servlet.class, property = { Constants.SERVICE_DESCRIPTION + "=HTTP servlet",
"sling.servlet.methods=" + HttpConstants.METHOD_GET, "sling.servlet.paths=" + "/bin/demo/httpcall" })
public class HttpServlet extends SlingSafeMethodsServlet {
/**
* Generated serialVersionUid
*/
private static final long serialVersionUID = -2014397651676211439L;
/**
* Logger
*/
private static final Logger log = LoggerFactory.getLogger(HttpServlet.class);
@Reference
private HttpService httpService;
/**
* Overridden doGet() method
*/
@Override
protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) {
try {
String jsonResponse = httpService.makeHttpCall();
/**
* Printing the json response on the browser
*/
response.getWriter().println(jsonResponse);
} catch (Exception e) {
log.error(e.getMessage(), e);
}
}
}
HttpServiceImpl.java
package com.mysite.core.services.impl;
import java.util.logging.FileHandler;
import org.apache.log4j.PropertyConfigurator;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.metatype.annotations.Designate;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
import java.util.logging.FileHandler;
import java.util.logging.Logger;
import com.mysite.core.services.HttpConfiguration;
import com.mysite.core.services.HttpService;
import com.mysite.core.utils.Network;
/**
*
* Implementation class of HttpService interface and this class reads values from the OSGi configuration as well
*/
@Component(service = HttpService.class, immediate = true)
@Designate(ocd = HttpConfiguration.class)
public class HttpServiceImpl implements HttpService {
//public static Logger logger = null;
/**
* Logger
*/
//private static final Logger log = LoggerFactory.getLogger(HttpServiceImpl.class);
/**
* Instance of the OSGi configuration class
*/
private HttpConfiguration configuration;
@Activate
protected void activate(HttpConfiguration configuration) {
this.configuration = configuration;
}
/**
* Overridden method of the HttpService
*/
@Override
public String makeHttpCall() throws Exception {
boolean append = true;
FileHandler handler = new FileHandler("default.log", append);
Logger log = Logger.getLogger("com.mysite.core.services.impl");
log.addHandler(handler);
log.info("----------< Reading the config values >----------");
try {
/**
* Reading values from the configuration
*/
boolean enable = true;
String protocol = "https";
String server = "jsonplaceholder.typicode.com";
String endpoint = "todos";
/**
* Constructing the URL
*/
String url = protocol + "://" + server + "/" + endpoint;
/**
* Make HTTP call only if "enable" is true
*/
if (enable) {
/**
* Making the actual HTTP call
*/
String response = Network.readJson(url);
/**
* Printing the response in the logs
*/
log.info("----------< JSON response from the webservice is >----------");
log.info(response);
System.out.println("response");
return response;
} else {
log.info("----------< Configuration is not enabled >----------");
return "Configuration not enabled";
}
} catch (Exception e) {
//log.error(e.getMessage(), e);
return "Error occurred" + e.getMessage();
}
}
}
Kindly suggest how can i call the makeHttpCall() in post.Post.jsp
