Add new API to fetch userstores

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/beans/UserStoreList.java

@@ -0,0 +1,53 @@
+/*
+ *   Copyright (c) 2016, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
+ *
+ *   WSO2 Inc. 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.jaxrs.beans;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+import java.util.List;
+
+@ApiModel(value = "User Store List")
+public class UserStoreList extends BasePaginatedResult {
+
+    private List<String> userStores;
+
+    @ApiModelProperty(value = "Returns the list of user stores available for a tenant.")
+    @JsonProperty("userStores")
+    public List<String> getList() {
+        return userStores;
+    }
+
+    public void setList(List<String> userStores) {
+        this.userStores = userStores;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("{\n");
+        sb.append("  count: ").append(getCount()).append(",\n");
+        sb.append("  userStores: [").append(userStores).append("\n");
+        sb.append("]}\n");
+        return sb.toString();
+    }
+
+
+}

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

@@ -60,6 +60,7 @@ import org.wso2.carbon.device.mgt.jaxrs.beans.OldPasswordResetWrapper;
 import org.wso2.carbon.device.mgt.jaxrs.beans.PermissionList;
 import org.wso2.carbon.device.mgt.jaxrs.beans.RoleList;
 import org.wso2.carbon.device.mgt.jaxrs.beans.UserInfo;
+import org.wso2.carbon.device.mgt.jaxrs.beans.UserStoreList;
 import org.wso2.carbon.device.mgt.jaxrs.util.Constants;
 
 import javax.validation.Valid;
@@ -1234,4 +1235,54 @@ public interface UserManagementService {
                     response = ErrorResponse.class)
     })
     Response getPermissionsOfUser();
+
+    @GET
+    @Path("/user-stores")
+    @ApiOperation(
+            produces = MediaType.APPLICATION_JSON,
+            httpMethod = "GET",
+            value = "Getting list of userstores",
+            notes = "You are able to manage users in WSO2 IoTS by adding, updating and removing users. If you wish to" +
+                    " get the list of users registered with WSO2 IoTS, you can do so "
+                    + "using this REST API",
+            tags = "User Management",
+            extensions = {
+                    @Extension(properties = {
+                            @ExtensionProperty(name = Constants.SCOPE, value = "perm:users:user-details")
+                    })
+            }
+    )
+    @ApiResponses(value = {
+            @ApiResponse(
+                    code = 200,
+                    message = "OK. \n Successfully fetched the list of user stores registered with WSO2 IoTS.",
+                    response = UserStoreList.class,
+                    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. \n Empty body because the client already has the latest version of " +
+                            "the requested resource.\n"),
+            @ApiResponse(
+                    code = 406,
+                    message = "Not Acceptable.\n The requested media type is not supported",
+                    response = ErrorResponse.class),
+            @ApiResponse(
+                    code = 500,
+                    message = "Internal Server Error. \n Server error occurred while fetching the list of WSO2 IoTS " +
+                            "user stores.",
+                    response = ErrorResponse.class)
+    })
+    Response getUserStores();
 }

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

@@ -64,6 +64,7 @@ import org.wso2.carbon.device.mgt.jaxrs.beans.OldPasswordResetWrapper;
 import org.wso2.carbon.device.mgt.jaxrs.beans.PermissionList;
 import org.wso2.carbon.device.mgt.jaxrs.beans.RoleList;
 import org.wso2.carbon.device.mgt.jaxrs.beans.UserInfo;
+import org.wso2.carbon.device.mgt.jaxrs.beans.UserStoreList;
 import org.wso2.carbon.device.mgt.jaxrs.exception.BadRequestException;
 import org.wso2.carbon.device.mgt.jaxrs.service.api.UserManagementService;
 import org.wso2.carbon.device.mgt.jaxrs.service.impl.util.RequestValidationUtil;
@@ -1270,4 +1271,39 @@ public class UserManagementServiceImpl implements UserManagementService {
         return permissionsList;
     }
 
+    /**
+     * Returns a Response with the list of user stores available for a tenant
+     * @return list of user stores
+     * @throws UserStoreException If unable to search for user stores
+     */
+    @GET
+    @Path("/user-stores")
+    @Override
+    public Response getUserStores() {
+        String domain;
+        List<String> userStores = new ArrayList<>();
+        UserStoreList userStoreList = new UserStoreList();
+        try {
+            RealmConfiguration realmConfiguration = DeviceMgtAPIUtils.getUserRealm().getRealmConfiguration();
+            userStores.add(realmConfiguration
+                    .getUserStoreProperty(UserCoreConstants.RealmConfig.PROPERTY_DOMAIN_NAME));
+
+            while (realmConfiguration != null) {
+                realmConfiguration = realmConfiguration.getSecondaryRealmConfig();
+                if (realmConfiguration != null) {
+                    domain = realmConfiguration
+                            .getUserStoreProperty(UserCoreConstants.RealmConfig.PROPERTY_DOMAIN_NAME);
+                    userStores.add(domain);
+                } else {
+                    break;
+                }
+            }
+        } catch (UserStoreException e) {
+            String msg = "Error occurred while retrieving user stores.";
+            log.error(msg, e);
+        }
+        userStoreList.setList(userStores);
+        userStoreList.setCount(userStores.size());
+        return Response.status(Response.Status.OK).entity(userStoreList).build();
+    }
 }