OSGI Servlet not found when I hit the servlet path

Thanks all for you help here. You guys are really great. smacdonald2008​ Arun Patidar​ Ratna Kumar​

Thanks Jorg. Finally I fixed the issue through .xml which has genretaed by my servlet. In XML I found out the space has been appended with my servlet path and that's causing an issue. Now removed the space and the servlet is getting called now.

Also If I add the below plugin then the XML is generated for my servlet otherwise it didn't.

<plugin> <groupId>org.apache.felix</groupId> <artifactId>maven-bundle-plugin</artifactId><version>3.5.1</version> <extensions>true</extensions> <executions> <!-- Configure extra execution of 'manifest' in process-classes phase to make sure SCR metadata is generated before unit test runs --> <execution> <id>scr-metadata</id> <goals> <goal>manifest</goal> </goals> <configuration><supportIncrementalBuild>true</supportIncrementalBuild> </configuration> </execution> </executions><configuration> <exportScr>true</exportScr> <instructions> <Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName> <Bundle-Description>${project.description} (Rev. ${buildNumber} at ${timestamp})</Bundle-Description> <!-- Enable processing of OSGI DS component annotations --> <_dsannotations>*</_dsannotations> <!-- Enable processing of OSGI metatype annotations --> <_metatypeannotations>*</_metatypeannotations> <_plugin> <!-- Support parsing of maven-scr-plugin annotations through the felix.scr.bnd plugin -->org.apache.felix.scrplugin.bnd.SCRDescriptorBndPlugin, <!-- Generate bundle header containing all configuration annotation classes --> org.apache.sling.caconfig.bndplugin.ConfigurationClassScannerPlugin, <!-- Generate bundle header for Sling Models classes --> org.apache.sling.bnd.models.ModelsScannerPlugin </_plugin></instructions> </configuration> <dependencies> <dependency> <groupId>org.apache.felix</groupId><artifactId>org.apache.felix.scr.bnd</artifactId> <version>1.9.0</version> </dependency> <dependency><groupId>org.apache.felix</groupId> <artifactId>org.apache.felix.scr.generator</artifactId><version>1.18.0</version> </dependency> <dependency> <groupId>org.apache.felix</groupId><artifactId>org.apache.felix.scr.annotations</artifactId> <version>1.11.0</version> </dependency> <dependency><groupId>org.apache.sling</groupId> <artifactId>org.apache.sling.caconfig.bnd-plugin</artifactId><version>1.0.2</version> </dependency> <dependency> <groupId>org.apache.sling</groupId><artifactId>org.apache.sling.bnd.models</artifactId> <version>1.0.0</version> </dependency> </dependencies></plugin>

Regards,

Vijay

Did you watch the video i posted.

Hi Arun,

Thanks for you help. I have my servlet code in place as you suggested already. For your reference I have placed the Felix annotation Servlet and OSGi DS annotations Servlet code below. Request you to help me if I missed anything here.

Felix Annoattions:

import ch.sample.aem.core.constants.AemConstants;

import ch.sample.aem.core.dto.SystemStatusBean;

import ch.sample.aem.core.helper.SystemStatusHelper;

import com.google.gson.Gson;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.Servlet;

import javax.servlet.ServletException;

import org.apache.felix.scr.annotations.Reference;

import org.apache.felix.scr.annotations.Service;

import org.apache.felix.scr.annotations.sling.SlingServlet;

import org.apache.jackrabbit.vault.packaging.Packaging;

import org.apache.sling.api.SlingHttpServletRequest;

import org.apache.sling.api.SlingHttpServletResponse;

import org.apache.sling.api.servlets.SlingSafeMethodsServlet;

import org.osgi.service.component.ComponentContext;

import org.osgi.service.component.annotations.Component;

@Service

@SuppressWarnings("serial")

@SlingServlet(paths = "/bin/custom/samplesystemstatus")

public class SampleSystemStatus extends SlingSafeMethodsServlet {

  /**

   * This is created to invoke the sample bundle, package and server details in AEM.

   *

   * @return jsonString

   */

  @Reference

  private Packaging packaging;

  SystemStatusHelper systemStatusHelper;

  SystemStatusBean systemStatus;

  protected void activate(ComponentContext ctx) {

    systemStatusHelper = new SystemStatusHelper();

    systemStatus = new SystemStatusBean();

    systemStatus = new SystemStatusBean();

    systemStatusHelper.getBundlesList(ctx, systemStatus);

  }

  @Override

  protected void doGet(final SlingHttpServletRequest req, final SlingHttpServletResponse resp)

      throws ServletException, IOException {

    systemStatusHelper.getHostDetails(req, systemStatus);

    systemStatus.setAlive(Boolean.TRUE);

    systemStatusHelper.getPackageList(req, systemStatus, packaging);

    String systemStatusJsonStr = new Gson().toJson(systemStatus);

    resp.setContentType(AemConstants.CONTENTTYPE);

    PrintWriter out = resp.getWriter();

    out.println(systemStatusJsonStr);

  }

}

After changed to OSGi Annotations:

package ch.sample.aem.core.servlet;

import ch.sample.aem.core.constants.AemConstants;

import ch.sample.aem.core.dto.SystemStatusBean;

import ch.sample.aem.core.helper.SystemStatusHelper;

import com.google.gson.Gson;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.Servlet;

import javax.servlet.ServletException;

import org.apache.jackrabbit.vault.packaging.Packaging;

import org.apache.sling.api.SlingHttpServletRequest;

import org.apache.sling.api.SlingHttpServletResponse;

import org.apache.sling.api.servlets.SlingSafeMethodsServlet;

import org.osgi.service.component.ComponentContext;

import org.osgi.service.component.annotations.Component;

import org.osgi.service.component.annotations.Reference;

@SuppressWarnings("serial")

@Component(service = Servlet.class, immediate = true,

    property = {

        "sling.servlet.paths =  /bin/custom/samplesystemstatus",          

        "sling.servlet.methods=GET"

})

public class SampleSystemStatus extends SlingSafeMethodsServlet {

  /**

   * This is created to invoke the sample bundle, package and server details in AEM.

   *

   * @return jsonString

   */

  @Reference

  private Packaging packaging;

  SystemStatusHelper systemStatusHelper;

  SystemStatusBean systemStatus;

  protected void activate(ComponentContext ctx) {

    systemStatusHelper = new SystemStatusHelper();

    systemStatus = new SystemStatusBean();

    systemStatusHelper.getBundlesList(ctx, systemStatus);

  }

  @Override

  protected void doGet(final SlingHttpServletRequest req, final SlingHttpServletResponse resp)

      throws ServletException, IOException {

    systemStatusHelper.getHostDetails(req, systemStatus);

    systemStatus.setAlive(Boolean.TRUE);

    systemStatusHelper.getPackageList(req, systemStatus, packaging);

    String systemStatusJsonStr = new Gson().toJson(systemStatus);

    resp.setContentType(AemConstants.CONTENTTYPE);

    PrintWriter out = resp.getWriter();

    out.println(systemStatusJsonStr);

  }

}

Since I'm unable to replace the @Reference annotation directly as recommend here https://blog.osoco.de/2016/05/migrating-from-the-apache-felix-scr-annotations-to-the-osgi-declarative-services-annotatio…  so I have still used Felix @Refernce. Appreciate your help.

smacdonald2008​ Ratna Kumar​ dgordon86​

Regards,

Vijay

Hi Siva,

Yes look into that sample of Arun pointed out.

And also, please look into the video shown by Scott. It will brief you more clearly.

Hope this helps!!

Thanks,

Ratna Kumar.

Watch this video (a servlet being successfully invoked using AJAX and GET). As discussed in the video - try shorting the path - ie bin/customservlet.

Try the sample that Arun suggested. Let us know if you still have an issue.

Hi,

Seems issue with the servlet code?

you can check sling servlet resolver http://localhost:4504/system/console/servletresolver

I've created a simple servlet, you can check and try

aem63app-repo/SimpleGetGroup.java at master · arunpatidar02/aem63app-repo · GitHub

Thanks

Arun