Add server-side pagination capability to GraphQL APIs

src/main/java/com/shareNwork/resource/AccessRequestResource.java

@@ -2,17 +2,16 @@
 
 import java.util.List;
 
-import javax.transaction.TransactionScoped;
 import javax.transaction.Transactional;
 
 import com.shareNwork.domain.AccessRequest;
-import com.shareNwork.domain.Invitation;
-import com.shareNwork.domain.InvitationResponse;
 import com.shareNwork.domain.constants.InvitationStatus;
+import io.quarkus.panache.common.Page;
 import lombok.AllArgsConstructor;
 import org.eclipse.microprofile.graphql.Description;
 import org.eclipse.microprofile.graphql.GraphQLApi;
 import org.eclipse.microprofile.graphql.Mutation;
+import org.eclipse.microprofile.graphql.Name;
 import org.eclipse.microprofile.graphql.Query;
 
 @AllArgsConstructor
@@ -25,6 +24,12 @@ public List<AccessRequest> findAllRequests() {
         return AccessRequest.listAll();
     }
 
+    @Query("accessRequestsByPage")
+    @Description("Get AccessRequests with pagination")
+    public List<AccessRequest> getAccessRequestsByPage(@Name("pageSize") int pageSize, @Name("pageOffset") int pageOffset) {
+        return AccessRequest.findAll().page(Page.of(pageOffset, pageSize)).list();
+    }
+
     @Mutation
     @Description("Create a new access request")
     @Transactional

src/main/java/com/shareNwork/resource/AllowedDesignationResource.java

@@ -1,9 +1,7 @@
 package com.shareNwork.resource;
 
 import com.shareNwork.domain.AllowedDesignationResponse;
-import com.shareNwork.domain.InvitationResponse;
 import com.shareNwork.repository.AllowedDesignationRepository;
-import com.shareNwork.repository.EmployeeRepository;
 import lombok.AllArgsConstructor;
 import org.eclipse.microprofile.graphql.Description;
 import org.eclipse.microprofile.graphql.GraphQLApi;
@@ -15,7 +13,7 @@ public class AllowedDesignationResource {
     private AllowedDesignationRepository allowedDesignationRepository;
 
     @Mutation
-    @Description("Check whether desg8ination is whitelisted")
+    @Description("Check whether designation is whitelisted")
     public AllowedDesignationResponse verifyDesignation(String designation) {
         return this.allowedDesignationRepository.verify(designation);
     }

src/main/java/com/shareNwork/resource/EmployeeResource.java

@@ -3,6 +3,7 @@
 import com.shareNwork.domain.Employee;
 import com.shareNwork.domain.filters.EmployeeFilter;
 import com.shareNwork.repository.EmployeeRepository;
+import io.quarkus.panache.common.Page;
 import lombok.AllArgsConstructor;
 import org.eclipse.microprofile.graphql.*;
 
@@ -21,6 +22,12 @@ public List<Employee> findAll() {
         return this.employeeRepository.findAll().list();
     }
 
+    @Query("employeesByPage")
+    @Description("Get employees with pagination")
+    public List<Employee> getEmployeesByPage(@Name("pageSize") int pageSize, @Name("pageOffset") int pageOffset) {
+        return this.employeeRepository.findAll().page(Page.of(pageOffset, pageSize)).list();
+    }
+
     @Query("employeesWithFilter")
     @Description("Get all Employees using the filters eq, lt,le,gt,ge")
     public List<Employee> findWithFilter(@Name("filter") EmployeeFilter filter) {

src/main/java/com/shareNwork/resource/InvitationResource.java

@@ -3,10 +3,12 @@
 import com.shareNwork.domain.Invitation;
 import com.shareNwork.domain.InvitationResponse;
 import com.shareNwork.repository.InvitationRepository;
+import io.quarkus.panache.common.Page;
 import lombok.AllArgsConstructor;
 import org.eclipse.microprofile.graphql.Description;
 import org.eclipse.microprofile.graphql.GraphQLApi;
 import org.eclipse.microprofile.graphql.Mutation;
+import org.eclipse.microprofile.graphql.Name;
 import org.eclipse.microprofile.graphql.Query;
 
 import java.util.List;
@@ -29,6 +31,12 @@ public Invitation getInvitationById(long id) {
         return this.invitationRepository.findById(id);
     }
 
+    @Query("invitationsByPage")
+    @Description("Get Invitations with pagination")
+    public List<Invitation> getInvitationsByPage(@Name("pageSize") int pageSize, @Name("pageOffset") int pageOffset) {
+        return this.invitationRepository.findAll().page(Page.of(pageOffset, pageSize)).list();
+    }
+
     @Mutation
     @Description("Create a new token")
     public InvitationResponse createInvitationToken(Invitation invitation) {

src/main/java/com/shareNwork/resource/ProjectResource.java

@@ -2,10 +2,12 @@
 
 import com.shareNwork.domain.Project;
 import com.shareNwork.repository.ProjectRepository;
+import io.quarkus.panache.common.Page;
 import lombok.AllArgsConstructor;
 import org.eclipse.microprofile.graphql.Description;
 import org.eclipse.microprofile.graphql.GraphQLApi;
 import org.eclipse.microprofile.graphql.Mutation;
+import org.eclipse.microprofile.graphql.Name;
 import org.eclipse.microprofile.graphql.Query;
 
 import java.text.ParseException;
@@ -23,6 +25,12 @@ public List<Project> findAll() {
         return this.projectRepository.findAll().list();
     }
 
+    @Query("projectsByPage")
+    @Description("Get projects with pagination")
+    public List<Project> getProjectsByPage(@Name("pageSize") int pageSize, @Name("pageOffset") int pageOffset) {
+        return this.projectRepository.findAll().page(Page.of(pageOffset, pageSize)).list();
+    }
+
     @Mutation
     @Description("Create a new Employee")
     public Project createProject(Project project) throws ParseException {

src/main/java/com/shareNwork/resource/SRRequestResource.java

@@ -2,19 +2,18 @@
 
 import com.shareNwork.domain.ResourceRequest;
 import com.shareNwork.domain.ResourceRequestSkillsProficiency;
-import com.shareNwork.domain.SharedResource;
 import com.shareNwork.repository.ResourceRequestRepository;
-import com.shareNwork.repository.SharedResourceRepository;
+import io.quarkus.panache.common.Page;
 import lombok.AllArgsConstructor;
 import org.eclipse.microprofile.graphql.Description;
 import org.eclipse.microprofile.graphql.GraphQLApi;
 import org.eclipse.microprofile.graphql.Mutation;
+import org.eclipse.microprofile.graphql.Name;
 import org.eclipse.microprofile.graphql.Query;
 
 import javax.transaction.Transactional;
 import java.text.ParseException;
 import java.util.List;
-import java.util.Set;
 
 @AllArgsConstructor
 @GraphQLApi
@@ -29,6 +28,12 @@ public List<ResourceRequest> getAllSharedResourceRequest() {
         return resourceRequestRepository.listAll();
     }
 
+    @Query("sharedResourceRequestsByPage")
+    @Description("Get SharedResourceRequest with pagination")
+    public List<ResourceRequest> getAccessRequestsByPage(@Name("pageSize") int pageSize, @Name("pageOffset") int pageOffset) {
+        return this.resourceRequestRepository.findAll().page(Page.of(pageOffset, pageSize)).list();
+    }
+
     @Query("getSkillsByRequestId")
     @Description("Get required skills of request Id")
     @Transactional

src/main/java/com/shareNwork/resource/SharedResource.java

@@ -4,6 +4,7 @@
 import com.shareNwork.domain.EmployeeSkillProficiency;
 import com.shareNwork.domain.filters.EmployeeFilter;
 import com.shareNwork.repository.SharedResourceRepository;
+import io.quarkus.panache.common.Page;
 import lombok.AllArgsConstructor;
 import org.eclipse.microprofile.graphql.*;
 
@@ -24,6 +25,11 @@ public List<com.shareNwork.domain.SharedResource> getAllSharedResource() {
         return this.sharedResourceRepository.listAll();
     }
 
+    @Query("sharedResourcesByPage")
+    @Description("Get SharedResource with pagination")
+    public List<com.shareNwork.domain.SharedResource> getSharedResourcesByPage(@Name("pageSize") int pageSize, @Name("pageOffset") int pageOffset) {
+        return this.sharedResourceRepository.findAll().page(Page.of(pageOffset, pageSize)).list();
+    }
     @Query("sharedResourceById")
     @Description("Get an SR by id")
     public com.shareNwork.domain.SharedResource getSRById(@Name("id") Long id) {

src/main/java/com/shareNwork/resource/SkillResource.java

@@ -2,10 +2,12 @@
 
 import com.shareNwork.domain.Skill;
 import com.shareNwork.repository.SkillRepository;
+import io.quarkus.panache.common.Page;
 import lombok.AllArgsConstructor;
 import org.eclipse.microprofile.graphql.Description;
 import org.eclipse.microprofile.graphql.GraphQLApi;
 import org.eclipse.microprofile.graphql.Mutation;
+import org.eclipse.microprofile.graphql.Name;
 import org.eclipse.microprofile.graphql.Query;
 
 import java.text.ParseException;
@@ -22,6 +24,12 @@ public List<Skill> findAll() {
         return this.skillRepository.findAll().list();
     }
 
+    @Query("skillsByPage")
+    @Description("Get Kills with pagination")
+    public List<Skill> getSkillsByPage(@Name("pageSize") int pageSize, @Name("pageOffset") int pageOffset) {
+        return this.skillRepository.findAll().page(Page.of(pageOffset, pageSize)).list();
+    }
+
     @Mutation
     @Description("Add a new skill")
     public Skill createSkill(Skill skill) throws ParseException {