Sample code for jcr based resource resolver

Hi @akshaybhujbale ,

Please refer to this article - https://unlocklearning.in/resource-resolver-in-aem/ 

Hope this will answer all your query related to Resource Resolver.

Regards,

Shiv

I know I might need Resource Resolver for different use cases, so normally I create a utility OSGi service and this OSGi service will be having two methods getResourceResolver() [it will return ResourceResolver] and closeResourceResolver() as shown below -

/**
 * 
 */
package com.aem.demo.core.services;

import org.apache.sling.api.resource.ResourceResolver;

/**
 * @author debal
 * 
 *         This service will be used as a utility and it will help us to get
 *         resource resolver object , JCR session and close resource resolver
 *
 */
public interface JcrUtility {

	public ResourceResolver getResourceResolver();

	public void closeResourceResolver(ResourceResolver resourceResolver);
}

Implementation class -

/**
 * 
 */
package com.aem.demo.core.services.impl;

import java.util.HashMap;
import java.util.Map;
import java.util.Objects;

import org.apache.sling.api.resource.LoginException;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.ResourceResolverFactory;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.aem.demo.core.services.JcrUtility;

/**
 * @author debal
 *
 */
@Component(service = JcrUtility.class, immediate = true) 
public class JcrUtilityImpl implements JcrUtility {

	private final Logger logger = LoggerFactory.getLogger(JcrUtilityImpl.class);

	@Reference
	ResourceResolverFactory resourceResolverFactory;

	@Override
	public ResourceResolver getResourceResolver() {
		Map<String, Object> map = new HashMap<String, Object>();
		map.put(resourceResolverFactory.SUBSERVICE, "readWriteService");
		ResourceResolver serviceResourceResolver = null;
		try {

			serviceResourceResolver = resourceResolverFactory.getServiceResourceResolver(map);
		} catch (LoginException e) {
			logger.error("Could not get service user [ {} ]", "demoSystemUser", e.getMessage());
		}
		return serviceResourceResolver;

	}

	@Override
	public void closeResourceResolver(ResourceResolver resourceResolver) {
		if (Objects.nonNull(resourceResolver)) {
			resourceResolver.close();
		}

	}

}

Now If I need ResourceResolver in Servlet and any other service then I can use 

@3214626

JcrUtility jcrUtility 

Then I can get ResourceResolver like ResourceResolver resourceResolver = jcrUtility.getResourceResolver();

In SlingModel , I can do

@OSGiService
JcrUtility jcrUtility; and ResourceResolver resourceResolver = jcrUtility.getResourceResolver();

Not sure about your use case but you can take a look into this https://cqwemblog.wordpress.com/2015/02/12/get-resource-resolver-from-session-cq5aem/

Hi @akshaybhujbale ,

Are you asking about resolving Session from ResourceResolver? In that case below is the code snippet.

1. Create system user, provide appropriate permissions
2. Map bundle symbolic name to system user

3. Use system user to get session via ResourceResolverFactory

   Map<String, Object> param = new HashMap<String, Object>();
   param.put(ResourceResolverFactory.SUBSERVICE, "<sub-service-name>");
   ResourceResolver resolver = null;         
   resolver = resolverFactory.getServiceResourceResolver(param);
   session = resolver.adaptTo(Session.class);

Correct me if I miss understood your question.

Regards,

Santosh