Optimizations

Former-commit-id: 8a9ec963f4

ccm-core/src/main/java/org/libreccm/api/admin/sites/SitesApi.java

@@ -22,6 +22,7 @@ import org.libreccm.api.Identifier;
 import org.libreccm.api.IdentifierParser;
 import org.libreccm.api.admin.sites.dto.SiteDto;
 import org.libreccm.api.admin.web.dto.CcmApplicationId;
+import org.libreccm.api.dto.ListView;
 import org.libreccm.core.CoreConstants;
 import org.libreccm.security.AuthorizationRequired;
 import org.libreccm.security.RequiresPrivilege;
@@ -41,6 +42,7 @@ import javax.transaction.Transactional;
 import javax.ws.rs.BadRequestException;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
+import javax.ws.rs.DefaultValue;
 import javax.ws.rs.GET;
 import javax.ws.rs.NotFoundException;
 import javax.ws.rs.POST;
@@ -48,6 +50,7 @@ import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
+import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.Context;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
@@ -82,12 +85,20 @@ public class SitesApi {
     @AuthorizationRequired
     @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
     @Transactional(Transactional.TxType.REQUIRED)
-    public List<SiteDto> getSites() {
-        return siteRepository
-            .findAll()
-            .stream()
-            .map(SiteDto::new)
-            .collect(Collectors.toList());
+    public ListView<SiteDto> getSites(
+        @QueryParam("limit") @DefaultValue("20") final int limit,
+        @QueryParam("offset") @DefaultValue("0") final int offset
+    ) {
+        return new ListView<>(
+            siteRepository
+                .findAll(limit, offset)
+                .stream()
+                .map(SiteDto::new)
+                .collect(Collectors.toList()),
+            siteRepository.countAll(),
+            limit,
+            offset
+        );
     }
 
     @GET
@@ -175,15 +186,21 @@ public class SitesApi {
     @AuthorizationRequired
     @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
     @Transactional(Transactional.TxType.REQUIRED)
-    public List<CcmApplicationId> getApplications(
-        @PathParam("siteIdentifier") final String siteIdentifier
+    public ListView<CcmApplicationId> getApplications(
+        @PathParam("siteIdentifier") final String siteIdentifier,
+        @QueryParam("limit") @DefaultValue("20") final int limit,
+        @QueryParam("offset") @DefaultValue("0") final int offset
     ) {
         final Site site = findSite(siteIdentifier);
-        return site
-            .getApplications()
-            .stream()
-            .map(CcmApplicationId::new)
-            .collect(Collectors.toList());
+        return new ListView<>(
+            siteRepository
+                .findApplicationsAsStream(site, limit, offset)
+                .map(CcmApplicationId::new)
+                .collect(Collectors.toList()),
+            siteRepository.countApplications(site),
+            limit,
+            offset
+        );
     }
 
     @PUT

ccm-core/src/main/java/org/libreccm/sites/SiteAwareApplication.java

@@ -28,6 +28,8 @@ import javax.persistence.CascadeType;
 import javax.persistence.Entity;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
+import javax.persistence.NamedQueries;
+import javax.persistence.NamedQuery;
 import javax.persistence.Table;
 
 /**
@@ -38,14 +40,26 @@ import javax.persistence.Table;
  * For example for the Admin application or the Content Center application
  * provided by the ccm-cms module it makes no sense to make them site aware.
  * These applications are used to manage objects which are shared by all sites.
- * Other applications like the Pages application provided by the ccm-cms module are
- * of course site aware. The Pages application for example manages the page tree
- * of one specific site.
+ * Other applications like the Pages application provided by the ccm-cms module
+ * are of course site aware. The Pages application for example manages the page
+ * tree of one specific site.
  *
  * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
  */
 @Entity
 @Table(name = "SITE_AWARE_APPLICATIONS", schema = DB_SCHEMA)
+@NamedQueries({
+    @NamedQuery(
+        name = "SiteAwareApplication.findForSite",
+        query = "SELECT a FROM SiteAwareApplication a WHERE a.site = :site"
+    ),
+    @NamedQuery(
+        name = "SiteAwareApplication.countForSite",
+        query = "SELECT COUNT(a) "
+            + "FROM SiteAwareApplication a "
+            + "WHERE a.site = :site"
+    )
+})
 public class SiteAwareApplication extends CcmApplication {
 
     private static final long serialVersionUID = -8892544588904174406L;

ccm-core/src/main/java/org/libreccm/sites/SiteRepository.java

@@ -25,6 +25,7 @@ import org.libreccm.security.RequiresPrivilege;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
+import java.util.stream.Stream;
 
 import javax.enterprise.context.RequestScoped;
 import javax.persistence.NoResultException;
@@ -119,6 +120,44 @@ public class SiteRepository extends AbstractEntityRepository<Long, Site> {
         return query.getSingleResult();
     }
 
+    @Transactional(Transactional.TxType.REQUIRED)
+    public List<SiteAwareApplication> findApplications(
+        final Site forSite, final int limit, final int offset
+    ) {
+        return getEntityManager()
+            .createNamedQuery(
+                "SiteAwareApplication.findForSite", SiteAwareApplication.class
+            )
+            .setParameter("site", forSite)
+            .setMaxResults(limit)
+            .setFirstResult(offset)
+            .getResultList();
+    }
+
+    @Transactional(Transactional.TxType.REQUIRED)
+    public Stream<SiteAwareApplication> findApplicationsAsStream(
+        final Site forSite, final int limit, final int offset
+    ) {
+        return getEntityManager()
+            .createNamedQuery(
+                "SiteAwareApplication.findForSite", SiteAwareApplication.class
+            )
+            .setParameter("site", forSite)
+            .setMaxResults(limit)
+            .setFirstResult(offset)
+            .getResultStream();
+    }
+
+    @Transactional(Transactional.TxType.REQUIRED)
+    public int countApplications(final Site forSite) {
+        return getEntityManager()
+            .createNamedQuery(
+                "SiteAwareApplication.countForSite", Integer.class
+            )
+            .setParameter("site", forSite)
+            .getSingleResult();
+    }
+
     @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
     @Transactional(Transactional.TxType.REQUIRED)
     @Override