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Sample servlet which easily prints an AEM/Sling Resource/Node as JSON to the PrintWriter.
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package com.nateyolles.aem; | |
import org.apache.felix.scr.annotations.sling.SlingServlet; | |
import org.apache.sling.api.SlingHttpServletRequest; | |
import org.apache.sling.api.SlingHttpServletResponse; | |
import org.apache.sling.api.resource.Resource; | |
import org.apache.sling.api.resource.ResourceResolver; | |
import org.apache.sling.api.servlets.SlingSafeMethodsServlet; | |
import org.apache.sling.commons.json.JSONException; | |
import org.apache.sling.commons.json.jcr.JsonItemWriter; | |
import org.slf4j.Logger; | |
import org.slf4j.LoggerFactory; | |
import javax.jcr.Node; | |
import javax.jcr.RepositoryException; | |
import javax.servlet.ServletException; | |
import java.io.IOException; | |
import java.io.PrintWriter; | |
import java.util.HashSet; | |
import java.util.Set; | |
import org.slf4j.Logger; | |
import org.slf4j.LoggerFactory; | |
/** | |
* Sample servlet which easily converts a Node as JSON to the PrintWriter. | |
*/ | |
@SlingServlet(paths={"/bin/foo"}) | |
public class ResourceToJSONServlet extends SlingSafeMethodsServlet { | |
/** The logger */ | |
private static final Logger logger = LoggerFactory.getLogger(ResourceToJSONServlet.class); | |
@Override | |
protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) | |
throws ServletException, IOException { | |
response.setCharacterEncoding("UTF-8"); | |
response.setContentType("application/json"); | |
final PrintWriter out = response.getWriter(); | |
final ResourceResolver resolver = request.getResourceResolver(); | |
final Resource resource = resolver.getResource("/content/my-app/us/en/my-page/jcr:content"); | |
final Node node = resource.adaptTo(Node.class); | |
/* Node properties to exclude from the JSON object. */ | |
final Set<String> propertiesToIgnore = new HashSet<String>() {{ | |
add("jcr:created"); | |
add("jcr:createdBy"); | |
add("jcr:versionHistory"); | |
add("jcr:predecessors"); | |
add("jcr:baseVersion"); | |
add("jcr:uuid"); | |
}}; | |
JsonItemWriter jsonWriter = new JsonItemWriter(propertiesToIgnore); | |
try { | |
/* Write the JSON to the PrintWriter with max recursion of 1 level and tidy formatting. */ | |
jsonWriter.dump(node, out, 1, true); | |
response.setStatus(SlingHttpServletResponse.SC_OK); | |
} catch (RepositoryException | JSONException e) { | |
logger.error("Could not get JSON", e); | |
response.setStatus(SlingHttpServletResponse.SC_INTERNAL_SERVER_ERROR); | |
} | |
} | |
} |
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