Add HEAD API to check the existence of application

components/application-mgt/org.wso2.carbon.device.application.mgt.common/src/main/java/org/wso2/carbon/device/application/mgt/common/services/ApplicationManager.java

@@ -66,6 +66,17 @@ public interface ApplicationManager {
     Application createCustomApp(CustomAppWrapper customAppWrapper, ApplicationArtifact applicationArtifact)
             throws ApplicationManagementException;
 
+    /**
+     * Check the existence of an application for given application name and the device type.
+     *
+     * @param appName Application name
+     * @param deviceTypeName Device Type name
+     * @return True if application exists for given application name and the device type, otherwise returns False
+     * @throws ApplicationManagementException if error occured while checking the application existence for given
+     * application name and device type or request with invalid device type data.
+     */
+    boolean isExistingAppName(String appName, String deviceTypeName) throws ApplicationManagementException;
+
     /**
      * Updates an already existing application.
      *

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/impl/ApplicationManagerImpl.java

@@ -237,7 +237,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
             throws ApplicationManagementException {
         try {
             int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId(true);
-            ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+            ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
             byte[] content = IOUtils.toByteArray(applicationArtifact.getInstallerStream());
             String md5OfApp = StorageManagementUtil.getMD5(new ByteArrayInputStream(content));
             if (md5OfApp == null) {
@@ -302,7 +302,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
      * @throws ApplicationManagementException if error occurred while deleting application release artifacts.
      */
     private void deleteApplicationArtifacts(List<String> directoryPaths, int tenantId) throws ApplicationManagementException {
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
         try {
             applicationStorageManager.deleteAllApplicationReleaseArtifacts(directoryPaths, tenantId);
         } catch (ApplicationStorageManagementException e) {
@@ -328,7 +328,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
             ApplicationReleaseDTO applicationReleaseDTO, ApplicationArtifact applicationArtifact, boolean isNewRelease)
             throws ResourceManagementException, ApplicationManagementException {
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId(true);
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
 
         String uuid = UUID.randomUUID().toString();
         applicationReleaseDTO.setUuid(uuid);
@@ -412,7 +412,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
             ApplicationReleaseDTO applicationReleaseDTO, ApplicationArtifact applicationArtifact)
             throws ResourceManagementException, ApplicationManagementException {
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId(true);
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
 
         // The application executable artifacts such as apks are uploaded.
         try {
@@ -505,7 +505,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
      */
     private ApplicationReleaseDTO addImageArtifacts(ApplicationReleaseDTO applicationReleaseDTO,
             ApplicationArtifact applicationArtifact, int tenantId) throws ResourceManagementException {
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
 
         applicationReleaseDTO.setIconName(applicationArtifact.getIconName());
         applicationReleaseDTO.setBannerName(applicationArtifact.getBannerName());
@@ -542,7 +542,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
      */
     private ApplicationReleaseDTO updateImageArtifacts(ApplicationReleaseDTO applicationReleaseDTO,
             ApplicationArtifact applicationArtifact, int tenantId) throws ResourceManagementException{
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
 
         if (!StringUtils.isEmpty(applicationArtifact.getIconName())) {
             applicationStorageManager
@@ -786,7 +786,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
      * @throws ApplicationManagementException which throws if error occurs while during application management.
      */
     private Application addAppDataIntoDB(ApplicationDTO applicationDTO, int tenantId) throws ApplicationManagementException {
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
         List<String> unrestrictedRoles = applicationDTO.getUnrestrictedRoles();
         ApplicationReleaseDTO applicationReleaseDTO = applicationDTO.getApplicationReleaseDTOs().get(0);
         List<String> categories = applicationDTO.getAppCategories();
@@ -1329,7 +1329,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
                     + applicationId);
         }
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId(true);
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
         ApplicationDTO applicationDTO = getApplication(applicationId);
         List<ApplicationReleaseDTO> applicationReleaseDTOs = applicationDTO.getApplicationReleaseDTOs();
         for (ApplicationReleaseDTO applicationReleaseDTO : applicationReleaseDTOs) {
@@ -1445,7 +1445,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
     public void deleteApplicationRelease(String releaseUuid)
             throws ApplicationManagementException {
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId(true);
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
         try {
             ConnectionManagerUtil.beginDBTransaction();
             ApplicationReleaseDTO applicationReleaseDTO = this.applicationReleaseDAO
@@ -1793,6 +1793,45 @@ public class ApplicationManagerImpl implements ApplicationManager {
         }
     }
 
+    @Override
+    public boolean isExistingAppName(String appName, String deviceTypeName) throws ApplicationManagementException {
+        int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId(true);
+        DeviceManagementProviderService deviceManagementProviderService = DataHolder.getInstance()
+                .getDeviceManagementService();
+        try {
+            DeviceType deviceType = deviceManagementProviderService.getDeviceType(deviceTypeName);
+            if (deviceType == null) {
+                String msg = "Device type doesn't not exist. Hence check the application name existence with valid "
+                        + "device type name.";
+                log.error(msg);
+                throw new BadRequestException(msg);
+            }
+            try {
+                ConnectionManagerUtil.openDBConnection();
+                if (applicationDAO.isExistingAppName(appName, deviceType.getId(), tenantId)) {
+                    return true;
+                }
+            } catch (DBConnectionException e) {
+                String msg = "Error occurred while getting DB connection to check the existence of application with "
+                        + "name: " + appName + " and the device type: " + deviceTypeName;
+                log.error(msg, e);
+                throw new ApplicationManagementException(msg, e);
+            } catch (ApplicationManagementDAOException e) {
+                String msg = "Error occurred while checking the existence of application with " + "name: " + appName
+                        + "and the  device type: " + deviceTypeName + " in the database";
+                log.error(msg);
+                throw new ApplicationManagementException(msg, e);
+            } finally {
+                ConnectionManagerUtil.closeDBConnection();
+            }
+        } catch (DeviceManagementException e) {
+            String msg = "Error occurred while getting the device type data for device type: " + deviceTypeName;
+            log.error(msg, e);
+            throw new ApplicationManagementException(msg, e);
+        }
+        return false;
+    }
+
     @Override
     public Application updateApplication(int applicationId, ApplicationUpdateWrapper applicationUpdateWrapper)
             throws ApplicationManagementException {
@@ -2707,7 +2746,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
             CustomAppReleaseWrapper customAppReleaseWrapper, ApplicationArtifact applicationArtifact)
             throws ApplicationManagementException {
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId(true);
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
         try {
             ConnectionManagerUtil.beginDBTransaction();
             ApplicationDTO applicationDTO = this.applicationDAO.getAppWithRelatedRelease(releaseUuid, tenantId);

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/impl/AppmDataHandlerImpl.java

@@ -29,6 +29,7 @@ import org.wso2.carbon.device.application.mgt.common.services.AppmDataHandler;
 import org.wso2.carbon.device.application.mgt.core.dao.ApplicationReleaseDAO;
 import org.wso2.carbon.device.application.mgt.core.dao.common.ApplicationManagementDAOFactory;
 import org.wso2.carbon.device.application.mgt.core.exception.BadRequestException;
+import org.wso2.carbon.device.application.mgt.core.util.APIUtil;
 import org.wso2.carbon.device.application.mgt.core.util.DAOUtil;
 import org.wso2.carbon.device.application.mgt.core.exception.ApplicationManagementDAOException;
 import org.wso2.carbon.device.application.mgt.core.exception.NotFoundException;
@@ -55,7 +56,7 @@ public class AppmDataHandlerImpl implements AppmDataHandler {
 
     @Override public InputStream getArtifactStream(int tenantId, String uuid, String folderName, String artifactName)
             throws ApplicationManagementException {
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
         ApplicationReleaseDAO applicationReleaseDAO = ApplicationManagementDAOFactory.getApplicationReleaseDAO();
         String appReleaseHashValue;
         try {
@@ -91,7 +92,7 @@ public class AppmDataHandlerImpl implements AppmDataHandler {
     @Override
     public InputStream getAgentStream(int tenantId, String deviceType)
             throws ApplicationManagementException {
-        ApplicationStorageManager applicationStorageManager = DAOUtil.getApplicationStorageManager();
+        ApplicationStorageManager applicationStorageManager = APIUtil.getApplicationStorageManager();
         try {
             InputStream inputStream = applicationStorageManager
                     .getFileStream(deviceType, tenantId);

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/util/APIUtil.java

@@ -87,19 +87,25 @@ public class APIUtil {
      * @return ApplicationStoreManager instance in the current osgi context.
      */
     public static ApplicationStorageManager getApplicationStorageManager() {
-        if (applicationStorageManager == null) {
+
-            synchronized (APIUtil.class) {
+        try {
-                if (applicationStorageManager == null) {
+            if (applicationStorageManager == null) {
-                    PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
+                synchronized (DAOUtil.class) {
-                    applicationStorageManager = (ApplicationStorageManager) ctx
-                            .getOSGiService(ApplicationStorageManager.class, null);
                     if (applicationStorageManager == null) {
-                        String msg = "ApplicationDTO Storage Manager service has not initialized.";
+                        applicationStorageManager = ApplicationManagementUtil
-                        log.error(msg);
+                                .getApplicationStorageManagerInstance();
-                        throw new IllegalStateException(msg);
+                        if (applicationStorageManager == null) {
+                            String msg = "ApplicationDTO Storage Manager service has not initialized.";
+                            log.error(msg);
+                            throw new IllegalStateException(msg);
+                        }
                     }
                 }
             }
+        } catch (Exception e) {
+            String msg = "Error occurred while getting the application store manager";
+            log.error(msg);
+            throw new IllegalStateException(msg);
         }
         return applicationStorageManager;
     }

components/application-mgt/org.wso2.carbon.device.application.mgt.core/src/main/java/org/wso2/carbon/device/application/mgt/core/util/DAOUtil.java

@@ -22,7 +22,6 @@ import com.google.gson.reflect.TypeToken;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.json.JSONException;
-import org.wso2.carbon.context.PrivilegedCarbonContext;
 import org.wso2.carbon.device.application.mgt.common.ExecutionStatus;
 import org.wso2.carbon.device.application.mgt.common.SubscriptionType;
 import org.wso2.carbon.device.application.mgt.common.dto.ApplicationDTO;
@@ -31,9 +30,6 @@ import org.wso2.carbon.device.application.mgt.common.dto.ApplicationReleaseDTO;
 import org.wso2.carbon.device.application.mgt.common.dto.DeviceSubscriptionDTO;
 import org.wso2.carbon.device.application.mgt.common.dto.ReviewDTO;
 import org.wso2.carbon.device.application.mgt.common.dto.ScheduledSubscriptionDTO;
-import org.wso2.carbon.device.application.mgt.common.services.ApplicationManager;
-import org.wso2.carbon.device.application.mgt.common.services.ApplicationStorageManager;
-import org.wso2.carbon.device.application.mgt.common.services.SubscriptionManager;
 import org.wso2.carbon.device.application.mgt.core.exception.UnexpectedServerErrorException;
 import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
 import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
@@ -311,80 +307,6 @@ public class DAOUtil {
         }
     }
 
-    private static volatile ApplicationManager applicationManager;
-    private static volatile ApplicationStorageManager applicationStorageManager;
-    private static volatile SubscriptionManager subscriptionManager;
-
-    public static ApplicationManager getApplicationManager() {
-        if (applicationManager == null) {
-            synchronized (DAOUtil.class) {
-                if (applicationManager == null) {
-                    PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
-                    applicationManager =
-                            (ApplicationManager) ctx.getOSGiService(ApplicationManager.class, null);
-                    if (applicationManager == null) {
-                        String msg = "ApplicationDTO Manager service has not initialized.";
-                        log.error(msg);
-                        throw new IllegalStateException(msg);
-                    }
-                }
-            }
-        }
-        return applicationManager;
-    }
-
-    /**
-     * To get the ApplicationDTO Storage Manager from the osgi context.
-     * @return ApplicationStoreManager instance in the current osgi context.
-     */
-    public static ApplicationStorageManager getApplicationStorageManager() {
-
-        try {
-            if (applicationStorageManager == null) {
-                synchronized (DAOUtil.class) {
-                    if (applicationStorageManager == null) {
-                        applicationStorageManager = ApplicationManagementUtil
-                                .getApplicationStorageManagerInstance();
-                        if (applicationStorageManager == null) {
-                            String msg = "ApplicationDTO Storage Manager service has not initialized.";
-                            log.error(msg);
-                            throw new IllegalStateException(msg);
-                        }
-                    }
-                }
-            }
-        } catch (Exception e) {
-            String msg = "Error occurred while getting the application store manager";
-            log.error(msg);
-            throw new IllegalStateException(msg);
-        }
-        return applicationStorageManager;
-    }
-
-
-    /**
-     * To get the Subscription Manager from the osgi context.
-     * @return SubscriptionManager instance in the current osgi context.
-     */
-    public static SubscriptionManager getSubscriptionManager() {
-        if (subscriptionManager == null) {
-            synchronized (DAOUtil.class) {
-                if (subscriptionManager == null) {
-                    PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
-                    subscriptionManager =
-                            (SubscriptionManager) ctx.getOSGiService(SubscriptionManager.class, null);
-                    if (subscriptionManager == null) {
-                        String msg = "Subscription Manager service has not initialized.";
-                        log.error(msg);
-                        throw new IllegalStateException(msg);
-                    }
-                }
-            }
-        }
-
-        return subscriptionManager;
-    }
-
     public static DeviceManagementProviderService getDeviceManagementService() {
 //        PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
 //        DeviceManagementProviderService deviceManagementProviderService =

components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/ApplicationManagementPublisherAPI.java

@@ -53,6 +53,7 @@ import javax.validation.Valid;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
 import javax.ws.rs.GET;
+import javax.ws.rs.HEAD;
 import javax.ws.rs.POST;
 import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
@@ -715,6 +716,51 @@ public interface ApplicationManagementPublisherAPI {
             @Multipart(value = "screenshot3") Attachment screenshot3
     );
 
+    @HEAD
+    @Path("/device-type/{deviceType}/app-name/{appName}")
+    @ApiOperation(
+            httpMethod = "HEAD",
+            value = "Check the application existence",
+            notes = "This API is responsible to check whether application exist or not for the given device type and "
+                    + "application name.",
+            tags = "Application Management",
+            extensions = {
+                    @Extension(properties = {
+                            @ExtensionProperty(name = SCOPE, value = "perm:app:publisher:view")
+                    })
+            }
+    )
+    @ApiResponses(
+            value = {
+                    @ApiResponse(
+                            code = 200,
+                            message = "OK. \n Application exists."),
+                    @ApiResponse(
+                            code = 404,
+                            message = "NOT FOUND. \n Could.t find an application for given device type and application "
+                                    + "name."),
+                    @ApiResponse(
+                            code = 400,
+                            message = "Bad Request. \n Found invalid device type with the request."),
+                    @ApiResponse(
+                            code = 500,
+                            message = "Internal Server Error. \n Error occurred while checking the application existence"
+                                    + " for given application name and device type name the application list.",
+                            response = ErrorResponse.class)
+            })
+    Response isExistingApplication(
+            @ApiParam(
+                    name = "deviceType",
+                    value = "Application compatible device type name",
+                    required = true)
+            @PathParam("deviceType") String deviceType,
+            @ApiParam(
+                    name = "appName",
+                    value = "Application name",
+                    required = true)
+            @PathParam("appName") String appName
+    );
+
     @PUT
     @Path("/ent-app-artifacts/{deviceType}/{appId}/{uuid}")
     @Produces(MediaType.APPLICATION_JSON)

components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.api/src/main/java/org/wso2/carbon/device/application/mgt/publisher/api/services/impl/ApplicationManagementPublisherAPIImpl.java

@@ -59,6 +59,7 @@ import javax.validation.Valid;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
 import javax.ws.rs.GET;
+import javax.ws.rs.HEAD;
 import javax.ws.rs.POST;
 import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
@@ -319,22 +320,22 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             applicationManager.validateBinaryArtifact(binaryFile);
             applicationManager.validateImageArtifacts(iconFile, bannerFile, attachmentList);
 
-            // Created new Ent App
+            // Created new Custom App
             Application application = applicationManager.createCustomApp(customAppWrapper,
                     constructApplicationArtifact(binaryFile, iconFile, bannerFile, attachmentList));
             if (application != null) {
                 return Response.status(Response.Status.CREATED).entity(application).build();
             } else {
-                String msg = "Application creation is failed";
+                String msg = "Custom app creation is failed";
                 log.error(msg);
                 return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
             }
         } catch (BadRequestException e) {
-            String msg = "Found incompatible payload with pub custom creating request.";
+            String msg = "Found incompatible payload with custom app creating request.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
-            String msg = "Error occurred while creating the application";
+            String msg = "Error occurred while creating a costom application";
             log.error(msg, e);
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (RequestValidatingException e) {
@@ -384,6 +385,27 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
         }
     }
 
+    @Override
+    @HEAD
+    @Path("/device-type/{deviceType}/app-name/{appName}")
+    public Response isExistingApplication(
+            @PathParam("deviceType") String deviceType,
+            @PathParam("appName") String appName ){
+        try {
+            ApplicationManager applicationManager = APIUtil.getApplicationManager();
+            if (applicationManager.isExistingAppName(appName, deviceType)) {
+                return Response.status(Response.Status.OK).build();
+            }
+            return Response.status(Response.Status.NOT_FOUND).build();
+        } catch (BadRequestException e) {
+            log.error("Found invalid device type to check application existence.", e);
+            return Response.status(Response.Status.BAD_REQUEST).build();
+        } catch (ApplicationManagementException e) {
+            log.error("Internal Error occurred while checking the application existence.", e);
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).build();
+        }
+    }
+
     @Override
     @PUT
     @Consumes({"multipart/mixed", MediaType.MULTIPART_FORM_DATA})