| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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.apache.nifi.web.dao.impl; |
| |
| import org.apache.nifi.components.state.Scope; |
| import org.apache.nifi.components.state.StateManager; |
| import org.apache.nifi.components.state.StateManagerProvider; |
| import org.apache.nifi.components.state.StateMap; |
| import org.apache.nifi.controller.ProcessorNode; |
| import org.apache.nifi.controller.ReportingTaskNode; |
| import org.apache.nifi.controller.service.ControllerServiceNode; |
| import org.apache.nifi.groups.RemoteProcessGroup; |
| import org.apache.nifi.web.ResourceNotFoundException; |
| import org.apache.nifi.web.dao.ComponentStateDAO; |
| |
| import java.io.IOException; |
| |
| public class StandardComponentStateDAO implements ComponentStateDAO { |
| |
| private StateManagerProvider stateManagerProvider; |
| |
| private StateMap getState(final String componentId, final Scope scope) { |
| try { |
| final StateManager manager = stateManagerProvider.getStateManager(componentId); |
| if (manager == null) { |
| throw new ResourceNotFoundException(String.format("State for the specified component %s could not be found.", componentId)); |
| } |
| |
| return manager.getState(scope); |
| } catch (final IOException ioe) { |
| throw new IllegalStateException(String.format("Unable to get the state for the specified component %s: %s", componentId, ioe), ioe); |
| } |
| } |
| |
| private void clearState(final String componentId) { |
| try { |
| final StateManager manager = stateManagerProvider.getStateManager(componentId); |
| if (manager == null) { |
| throw new ResourceNotFoundException(String.format("State for the specified component %s could not be found.", componentId)); |
| } |
| |
| // clear both state's at the same time |
| manager.clear(Scope.CLUSTER); |
| manager.clear(Scope.LOCAL); |
| } catch (final IOException ioe) { |
| throw new IllegalStateException(String.format("Unable to clear the state for the specified component %s: %s", componentId, ioe), ioe); |
| } |
| } |
| |
| @Override |
| public StateMap getState(ProcessorNode processor, Scope scope) { |
| return getState(processor.getIdentifier(), scope); |
| } |
| |
| @Override |
| public void clearState(ProcessorNode processor) { |
| clearState(processor.getIdentifier()); |
| } |
| |
| @Override |
| public StateMap getState(ControllerServiceNode controllerService, Scope scope) { |
| return getState(controllerService.getIdentifier(), scope); |
| } |
| |
| @Override |
| public void clearState(ControllerServiceNode controllerService) { |
| clearState(controllerService.getIdentifier()); |
| } |
| |
| @Override |
| public StateMap getState(ReportingTaskNode reportingTask, Scope scope) { |
| return getState(reportingTask.getIdentifier(), scope); |
| } |
| |
| @Override |
| public void clearState(ReportingTaskNode reportingTask) { |
| clearState(reportingTask.getIdentifier()); |
| } |
| |
| @Override |
| public StateMap getState(RemoteProcessGroup remoteProcessGroup, Scope scope) { |
| return getState(remoteProcessGroup.getIdentifier(), scope); |
| } |
| |
| /* setters */ |
| |
| public void setStateManagerProvider(StateManagerProvider stateManagerProvider) { |
| this.stateManagerProvider = stateManagerProvider; |
| } |
| } |