Adding new apis for device informations

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

@@ -19,14 +19,17 @@
 package org.wso2.carbon.device.mgt.jaxrs.api;
 
 import io.swagger.annotations.*;
+import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceLocation;
 
 import javax.ws.rs.GET;
+import javax.ws.rs.POST;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
+import java.util.List;
 
 /**
  * Device information related operations.
@@ -55,6 +58,26 @@ public interface DeviceInformation {
                            @ApiParam(name = "id", value = "Provide the device identifier", required = true)
                                     @PathParam("id") String id);
 
+
+    @POST
+    @Path("{list}")
+    @ApiOperation(
+            produces = MediaType.APPLICATION_JSON,
+            httpMethod = "POST",
+            value = "Get devices information from the supplied device identifies",
+            notes = "This will return device information such as CPU usage, memory usage etc for supplied device " +
+                    "identifiers.",
+            response = DeviceInfo.class,
+            responseContainer = "List")
+    @ApiResponses(value = {
+            @ApiResponse(code = 200, message = ""),
+            @ApiResponse(code = 400, message = ""),
+            @ApiResponse(code = 400, message = ""),
+            @ApiResponse(code = 500, message = "Internal Server Error")
+    })
+    Response  getDevicesInfo(@ApiParam(name = "deviceIdentifiers", value = "List of device identifiers",
+            required = true) List<DeviceIdentifier> deviceIdentifiers);
+
     @GET
     @Path("location/{type}/{id}")
     @ApiOperation(

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

@@ -30,9 +30,11 @@ import org.wso2.carbon.device.mgt.jaxrs.api.DeviceInformation;
 import org.wso2.carbon.device.mgt.jaxrs.api.util.DeviceMgtAPIUtils;
 
 import javax.ws.rs.GET;
+import javax.ws.rs.POST;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.core.Response;
+import java.util.List;
 
 @SuppressWarnings("NonJaxWsWebServices")
 public class DeviceInformationImpl implements DeviceInformation {
@@ -59,6 +61,23 @@ public class DeviceInformationImpl implements DeviceInformation {
     }
 
 
+    @POST
+    @Path("list")
+    public Response getDevicesInfo(List<DeviceIdentifier> deviceIdentifiers) {
+        DeviceInformationManager informationManager;
+        List<DeviceInfo> deviceInfos;
+        try {
+            informationManager = DeviceMgtAPIUtils.getDeviceInformationManagerService();
+            deviceInfos = informationManager.getDevicesInfo(deviceIdentifiers);
+        } catch (DeviceDetailsMgtException e) {
+            String msg = "Error occurred while getting the device information.";
+            log.error(msg, e);
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
+        }
+        return Response.status(Response.Status.OK).entity(deviceInfos).build();
+    }
+
+
     @GET
     @Path("location/{type}/{id}")
     public Response getDeviceLocation(@PathParam("type") String type, @PathParam("id") String id) {

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/webapp/META-INF/permissions.xml

@@ -876,6 +876,13 @@
         <method>GET</method>
     </Permission>
 
+    <Permission>
+        <name>Device Information</name>
+        <path>/device-mgt/admin/information/list</path>
+        <url>/information/list</url>
+        <method>POST</method>
+    </Permission>
+
     <Permission>
         <name>Device Search</name>
         <path>/device-mgt/admin/search</path>

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/device/details/mgt/DeviceInformationManager.java

@@ -23,6 +23,8 @@ import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceLocation;
 
+import java.util.List;
+
 /**
  * This class will manage the storing of device details related generic information such as cpu/memory utilization, battery level,
  * plugged in to a power source or operation on battery.
@@ -47,6 +49,14 @@ public interface DeviceInformationManager {
      */
     DeviceInfo getDeviceInfo(DeviceIdentifier deviceIdentifier) throws DeviceDetailsMgtException;
 
+    /**
+     * This method will return device information for the supplied devices list.
+     * @param deviceIdentifiers
+     * @return List of device info objects
+     * @throws DeviceDetailsMgtException
+     */
+    List<DeviceInfo> getDevicesInfo(List<DeviceIdentifier> deviceIdentifiers) throws DeviceDetailsMgtException;
+
     /**
      * This method will manage storing the device location as latitude, longitude, address, zip, country etc..
      * @param deviceLocation - Device location object.

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/device/details/mgt/impl/DeviceInformationManagerImpl.java

@@ -35,6 +35,10 @@ import org.wso2.carbon.device.mgt.core.device.details.mgt.dao.DeviceDetailsMgtDA
 import org.wso2.carbon.device.mgt.core.internal.DeviceManagementDataHolder;
 
 import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 public class DeviceInformationManagerImpl implements DeviceInformationManager {
 
@@ -97,6 +101,43 @@ public class DeviceInformationManagerImpl implements DeviceInformationManager {
         }
     }
 
+    @Override
+    public List<DeviceInfo> getDevicesInfo(List<DeviceIdentifier> deviceIdentifiers) throws DeviceDetailsMgtException {
+
+        List<DeviceInfo> deviceInfos = new ArrayList<>();
+
+        Map<String, DeviceIdentifier> identifierMap = new HashMap<>();
+        for (DeviceIdentifier identifier : deviceIdentifiers) {
+            identifierMap.put(identifier.getId(), identifier);
+        }
+        try {
+            List<Integer> deviceIds = new ArrayList<>();
+            List<Device> devices = DeviceManagementDataHolder.getInstance().
+                    getDeviceManagementProvider().getAllDevices();
+            for (Device device : devices) {
+                if (identifierMap.containsKey(device.getDeviceIdentifier()) &&
+                        device.getType().equals(identifierMap.get(device.getDeviceIdentifier()))) {
+                    deviceIds.add(device.getId());
+                }
+            }
+            DeviceManagementDAOFactory.openConnection();
+            for(Integer id : deviceIds) {
+                DeviceInfo deviceInfo = deviceDetailsDAO.getDeviceInformation(id);
+                deviceInfo.setDeviceDetailsMap(deviceDetailsDAO.getDeviceProperties(id));
+                deviceInfos.add(deviceInfo);
+            }
+        } catch (SQLException e) {
+            throw new DeviceDetailsMgtException("SQL error occurred while retrieving devices from database.", e);
+        } catch (DeviceManagementException e) {
+            throw new DeviceDetailsMgtException("Exception occurred while retrieving the devices.", e);
+        } catch (DeviceDetailsMgtDAOException e) {
+            throw new DeviceDetailsMgtException("Exception occurred while retrieving devices details.", e);
+        } finally {
+            DeviceManagementDAOFactory.closeConnection();
+        }
+        return deviceInfos;
+    }
+
     @Override
     public void addDeviceLocation(DeviceLocation deviceLocation) throws DeviceDetailsMgtException {