Add get tenant API

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/api/admin/DeviceManagementAdminService.java

@@ -49,6 +49,7 @@ import org.apache.axis2.transport.http.HTTPConstants;
 import org.wso2.carbon.apimgt.annotations.api.Scope;
 import org.wso2.carbon.apimgt.annotations.api.Scopes;
 import org.wso2.carbon.device.mgt.common.Device;
+import org.wso2.carbon.device.mgt.common.general.TenantDetail;
 import org.wso2.carbon.device.mgt.jaxrs.beans.DeviceGroupList;
 import org.wso2.carbon.device.mgt.jaxrs.beans.DeviceList;
 import org.wso2.carbon.device.mgt.jaxrs.beans.ErrorResponse;
@@ -100,6 +101,12 @@ import java.util.List;
                         description = "Permanently Delete the device specified by device id",
                         key = "perm:devices:permanent-delete",
                         permissions = {"/device-mgt/admin/devices/permanent-delete"}
+                ),
+                @Scope(
+                        name = "Getting Details of Device tenants",
+                        description = "Getting Details of Device tenants",
+                        key = "perm:admin:tenant:view",
+                        permissions = {"/device-mgt/devices/tenants/view"}
                 )
         }
 )
@@ -353,4 +360,54 @@ public interface DeviceManagementAdminService {
                     value = "List of device identifiers.",
                     required = true)
                     List<String> deviceIdentifiers);
+
+    @GET
+    @Path("/tenants")
+    @ApiOperation(
+            produces = MediaType.APPLICATION_JSON,
+            httpMethod = "GET",
+            value = "Getting Details of tenants",
+            notes = "Get the details of tenants.",
+            response = TenantDetail.class,
+            responseContainer = "List",
+            tags = "Device Management Administrative Service",
+            extensions = {
+                    @Extension(properties = {
+                            @ExtensionProperty(name = Constants.SCOPE, value =
+                                    "perm:admin:tenant:view")
+                    })
+            }
+    )
+    @ApiResponses(value = {
+            @ApiResponse(code = 200, message = "OK. \n Successfully fetched the list of tenants.",
+                    response = TenantDetail.class,
+                    responseContainer = "List",
+                    responseHeaders = {
+                            @ResponseHeader(
+                                    name = "Content-Type",
+                                    description = "The content type of the body"),
+                            @ResponseHeader(
+                                    name = "ETag",
+                                    description = "Entity Tag of the response resource.\n" +
+                                            "Used by caches, or in conditional requests."),
+                            @ResponseHeader(
+                                    name = "Last-Modified",
+                                    description = "Date and time the resource was last modified.\n" +
+                                            "Used by caches, or in conditional requests."),
+                    }),
+            @ApiResponse(
+                    code = 304,
+                    message = "Not Modified. Empty body because the client already has the latest version of the " +
+                            "requested resource.\n"),
+            @ApiResponse(
+                    code = 401,
+                    message = "Unauthorized.\n The unauthorized access to the requested resource.",
+                    response = ErrorResponse.class),
+            @ApiResponse(
+                    code = 500,
+                    message = "Internal Server Error. \n Server error occurred while fetching the" +
+                            " tenant list.",
+                    response = ErrorResponse.class)
+    })
+    Response getTenants();
 }

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/admin/DeviceManagementAdminServiceImpl.java

@@ -45,13 +45,19 @@ import org.wso2.carbon.device.mgt.common.PaginationRequest;
 import org.wso2.carbon.device.mgt.common.exceptions.DeviceManagementException;
 import org.wso2.carbon.device.mgt.common.exceptions.InvalidDeviceException;
 import org.wso2.carbon.device.mgt.common.exceptions.UserNotFoundException;
+import org.wso2.carbon.device.mgt.common.general.TenantDetail;
 import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
 import org.wso2.carbon.device.mgt.jaxrs.beans.DeviceList;
 import org.wso2.carbon.device.mgt.jaxrs.beans.ErrorResponse;
 import org.wso2.carbon.device.mgt.jaxrs.service.api.admin.DeviceManagementAdminService;
 import org.wso2.carbon.device.mgt.jaxrs.service.impl.util.RequestValidationUtil;
 import org.wso2.carbon.device.mgt.jaxrs.util.DeviceMgtAPIUtils;
+import org.wso2.carbon.user.api.Tenant;
+import org.wso2.carbon.user.api.TenantManager;
+import org.wso2.carbon.user.api.UserStoreException;
+import org.wso2.carbon.user.core.service.RealmService;
 
+import javax.servlet.http.HttpServletResponse;
 import javax.validation.constraints.Size;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.GET;
@@ -62,6 +68,7 @@ import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
+import java.util.ArrayList;
 import java.util.List;
 
 @Path("/admin/devices")
@@ -189,4 +196,51 @@ public class DeviceManagementAdminServiceImpl implements DeviceManagementAdminSe
                     new ErrorResponse.ErrorResponseBuilder().setMessage(msg).build()).build();
         }
     }
+
+    @Override
+    @Path("/tenants")
+    @GET
+    public Response getTenants() {
+        List<TenantDetail> tenantDetails;
+        int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId();
+        if (tenantId == MultitenantConstants.SUPER_TENANT_ID) {
+            RealmService realmService = (RealmService) PrivilegedCarbonContext
+                    .getThreadLocalCarbonContext().getOSGiService(RealmService.class, null);
+            if (realmService == null) {
+                String msg = "RealmService is not initialized";
+                log.error(msg);
+                return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
+            }
+
+            try {
+                Tenant[] tenants = realmService.getTenantManager().getAllTenants();
+                tenantDetails = new ArrayList<>();
+                if (tenants != null && tenants.length > 0) {
+                    for (Tenant tenant : tenants) {
+                        TenantDetail tenantDetail = new TenantDetail();
+                        tenantDetail.setId(tenant.getId());
+                        tenantDetail.setAdminFirstName(tenant.getAdminFirstName());
+                        tenantDetail.setAdminFullName(tenant.getAdminFullName());
+                        tenantDetail.setAdminLastName(tenant.getAdminLastName());
+                        tenantDetail.setAdminName(tenant.getAdminName());
+                        tenantDetail.setDomain(tenant.getDomain());
+                        tenantDetail.setEmail(tenant.getEmail());
+                        tenantDetails.add(tenantDetail);
+                    }
+                    return Response.status(Response.Status.OK).entity(tenantDetails).build();
+                } else {
+                    return Response.status(Response.Status.NOT_FOUND).entity("No tenants found")
+                            .build();
+                }
+            } catch (UserStoreException e) {
+                String msg = "Error occurred while fetching tenant list";
+                log.error(msg, e);
+                return Response.serverError().entity(
+                    new ErrorResponse.ErrorResponseBuilder().setMessage(msg).build()).build();
+            }
+        } else {
+            return Response.status(Response.Status.BAD_REQUEST).entity("This API is available " +
+                    "for super tenant admin only.").build();
+        }
+    }
 }

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/general/TenantDetail.java

@@ -0,0 +1,88 @@
+/*
+ *   Copyright (c) 2019, Entgra (pvt) Ltd. (https://entgra.io) All Rights Reserved.
+ *
+ *   Entgra (Pvt) Ltd. licenses this file to you under the Apache License,
+ *   Version 2.0 (the "License"); you may not use this file except
+ *   in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing,
+ *   software distributed under the License is distributed on an
+ *   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *   KIND, either express or implied. See the License for the
+ *   specific language governing permissions and limitations
+ *   under the License.
+ */
+package org.wso2.carbon.device.mgt.common.general;
+
+public class TenantDetail {
+
+    private int id;
+    private String domain;
+
+    private String adminName;
+    private String adminFullName;
+    private String adminFirstName;
+    private String adminLastName;
+    private String email;
+
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getDomain() {
+        return domain;
+    }
+
+    public void setDomain(String domain) {
+        this.domain = domain;
+    }
+
+    public String getAdminName() {
+        return adminName;
+    }
+
+    public void setAdminName(String adminName) {
+        this.adminName = adminName;
+    }
+
+    public String getAdminFullName() {
+        return adminFullName;
+    }
+
+    public void setAdminFullName(String adminFullName) {
+        this.adminFullName = adminFullName;
+    }
+
+    public String getAdminFirstName() {
+        return adminFirstName;
+    }
+
+    public void setAdminFirstName(String adminFirstName) {
+        this.adminFirstName = adminFirstName;
+    }
+
+    public String getAdminLastName() {
+        return adminLastName;
+    }
+
+    public void setAdminLastName(String adminLastName) {
+        this.adminLastName = adminLastName;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+}