Please find below a sample that queries for posts posted after a given time. This is just a sample that i wrote to explain to you.
package com.adobe.acs.commons.soco.servlets;
import com.adobe.cq.social.commons.client.api.SocialComponent;
import com.adobe.cq.social.commons.client.api.SocialComponentFactory;
import com.adobe.cq.social.commons.client.api.SocialComponentFactoryManager;
import com.adobe.cq.social.ugc.api.*;
import com.adobe.cq.social.ugcbase.SocialResourceUtils;
import com.adobe.cq.social.ugcbase.SocialUtils;
import com.day.cq.search.PredicateGroup;
import com.day.cq.search.Query;
import com.day.cq.search.QueryBuilder;
import com.day.cq.search.result.Hit;
import com.day.cq.search.result.SearchResult;
import com.day.cq.wcm.api.Page;
import com.day.cq.wcm.api.PageManager;
import org.apache.commons.lang3.StringUtils;
import org.apache.felix.scr.annotations.*;
import org.apache.felix.scr.annotations.Properties;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.*;
import org.apache.sling.api.servlets.HttpConstants;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.apache.sling.api.wrappers.SlingHttpServletRequestWrapper;
import org.apache.sling.commons.json.JSONArray;
import org.apache.sling.commons.json.JSONException;
import org.apache.sling.commons.json.JSONObject;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URLDecoder;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
@Component
@Service
@Properties({
@Property(name = "service.description",
value = "com.adobe.acs.commons.servlets.SampleJSONServlet"),
@Property(name = "sling.servlet.resourceTypes", value = {"sling/servlet/default"}, propertyPrivate = true),
@Property(name = "sling.servlet.methods", value = {HttpConstants.METHOD_GET}, propertyPrivate = true),
@Property(name = "sling.servlet.selectors", value = {"sample"}, propertyPrivate = false),
@Property(name = "sling.servlet.extensions", value = {"json"}, propertyPrivate = false)})
public class SampleJSONServlet extends SlingSafeMethodsServlet {
@Reference
private SocialUtils socialUtils;
@Reference
private SocialComponentFactoryManager socialComponentFactoryManager;
@Reference
private UgcSearch ugcSearch;
@Override
protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) throws ServletException, IOException {
String lastreloadtime = request.getParameter("lrt");
if("undefined".equals(lastreloadtime)){
lastreloadtime=null;
}
JSONObject obj = new JSONObject();
JSONArray arr = new JSONArray();
final ResourceResolver resolver = request.getResourceResolver();
final Session session = resolver.adaptTo(Session.class);
PageManager pageManager = resolver.adaptTo(PageManager.class);
Page page = pageManager.getContainingPage(request.getResource());
List<SocialComponent> hits = new ArrayList<SocialComponent>();
try {
Resource resource = request.getResource();
if(request.getParameter("lrt")!=null) {
final UgcFilter ugcFilter = getFilter(request, page.getPath());
if (ResourceUtil.isSyntheticResource(resource)) {
page = pageManager.getContainingPage(resource);
} else if (SocialResourceUtils.isSocialResource(resource)) {
final ValueMap vm = resource.adaptTo(ValueMap.class);
final String rootResource = vm.get(SocialUtils.PN_CS_ROOT, "");
page = pageManager.getContainingPage(rootResource);
}
final SearchResults<Resource> results = ugcSearch.find("ugc-sc", resolver, ugcFilter, 1, 10000);
for (final Resource res : results.getResults()) {
if (res != null) {
try {
final SocialComponentFactory factory = socialComponentFactoryManager.getSocialComponentFactory(res);
SocialComponent component = (factory != null) ? factory.getSocialComponent(res, request)
: null;
if (component != null) {
arr.put(new JSONObject(component.toJSONString(false)));
}
} catch (Exception e) {
}
}
}
}
obj.put("items", arr);
SimpleDateFormat dateFormatGmt = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS");
Date date1 = new Date();
obj.put("lastreloadtime", dateFormatGmt.format(new Date()));
response.setContentType("text/json");
obj.write(response.getWriter());
} catch (ParseException e) {
//e.printStackTrace();
} catch (RepositoryException e) {
// e.printStackTrace();
} catch (JSONException e) {
//e.printStackTrace();
}catch(Exception e){
// e.printStackTrace(System.out);
e.printStackTrace(response.getWriter());
}
}
private UgcFilter getFilter(SlingHttpServletRequest request,String path) throws ParseException {
final UgcFilter ugcFilter = new UgcFilter();
final ConstraintGroup pathFilters = new ConstraintGroup();
PathConstraint pathConstraint = new PathConstraint(path, PathConstraintType.IsDescendantNode,Operator.And);
pathFilters.and(pathConstraint);
SimpleDateFormat dateFormatGmt = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS");
dateFormatGmt.setTimeZone(TimeZone.getTimeZone("GMT"));
String ltr= request.getParameter("lrt");
ValueConstraint<Long> valueConstraint = new ValueConstraint<Long>(SocialUtils.PN_DATE,dateFormatGmt.parse(ltr).getTime(),ComparisonType.GreaterThan);
pathFilters.and(valueConstraint);
ugcFilter.and(pathFilters);
return ugcFilter;
}
}
