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/*
* Copyright (C) 2021 Samsung Electronics
* Licensed 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.onap.a1pesimulator.service.cell;
import java.util.Optional;
import org.onap.a1pesimulator.data.cell.CellDetails;
import org.onap.a1pesimulator.data.cell.state.CellStateEnum;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.messaging.simp.SimpMessagingTemplate;
import org.springframework.stereotype.Service;
@Service
public class RanCellStateService {
private static final Logger log = LoggerFactory.getLogger(RanCellStateService.class);
private final RanCellsHolder cellsHolder;
private final SimpMessagingTemplate messagingTemplate;
public static final String TOPIC_CELL = "/topic/cellStatus";
public RanCellStateService(RanCellsHolder cellsHolder, SimpMessagingTemplate messagingTemplate) {
this.cellsHolder = cellsHolder;
this.messagingTemplate = messagingTemplate;
}
public boolean activateState(String identifier) {
Optional<CellDetails> cellDetails = getCell(identifier);
if (cellExist(cellDetails, identifier, "Activate")) {
boolean changed = nextStateIfPossible(cellDetails.get(), CellStateEnum.INACTIVE);
if (changed) {
sendCellNotification(cellDetails.get());
return true;
}
}
return false;
}
public boolean failingState(String identifier) {
Optional<CellDetails> cellDetails = getCell(identifier);
if (cellExist(cellDetails, identifier, "Failing")) {
boolean changed = nextStateIfPossible(cellDetails.get(), CellStateEnum.ACTIVE);
if (changed) {
sendCellNotification(cellDetails.get());
return true;
}
}
return false;
}
public boolean stopState(String identifier) {
Optional<CellDetails> cellDetails = getCell(identifier);
if (cellExist(cellDetails, identifier, "Stop")) {
boolean changed = previousStateIfPossible(cellDetails.get());
if (changed) {
sendCellNotification(cellDetails.get());
return true;
}
}
return false;
}
private boolean cellExist(Optional<CellDetails> cellDetails, String identifier, String actionName) {
if (cellDetails.isEmpty()) {
log.info("Cell not found for {} identifier! '{}' action won't be executed!", identifier, actionName);
return false;
}
return true;
}
private boolean previousStateIfPossible(CellDetails cell) {
CellStateEnum state = cell.getCellStateMachine().getState();
if (state == CellStateEnum.SLEEPING || state == CellStateEnum.GOING_TO_SLEEP || state == CellStateEnum.ACTIVE) {
cell.previousState();
} else {
log.info("Cell {} is in {} state! The changing of the state isn't allowed."
+ "Supported states are: GOING_TO_SLEEP, SLEEPING, ACTIVE.", cell.getId(),
cell.getCellStateMachine().getState().value);
return false;
}
return true;
}
private boolean nextStateIfPossible(CellDetails cellDetails, CellStateEnum shouldBe) {
if (cellDetails.getCellStateMachine().getState() == shouldBe) {
cellDetails.nextState();
} else {
log.info(
"Cell {} is in {} state. The changing of the state isn't allowed. " + "The supported state is: {}!",
cellDetails.getId(), cellDetails.getCellStateMachine().getState().value, shouldBe.value);
return false;
}
return true;
}
private Optional<CellDetails> getCell(String identifier) {
CellDetails cell = cellsHolder.getCellById(identifier);
if (cell == null) {
return Optional.empty();
}
return Optional.of(cell);
}
private void sendCellNotification(CellDetails cellDetails) {
messagingTemplate.convertAndSend(TOPIC_CELL, cellDetails);
}
}
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