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Provides a UI for db-scheduler
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/*
 * Copyright (C) Bekk
 *
 * 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 no.bekk.dbscheduler.ui.util;

import com.github.kagkarlsson.scheduler.ScheduledExecution;
import com.github.kagkarlsson.scheduler.ScheduledExecutionsFilter;
import com.github.kagkarlsson.scheduler.Scheduler;
import com.github.kagkarlsson.scheduler.task.TaskInstanceId;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import no.bekk.dbscheduler.ui.model.LogModel;
import no.bekk.dbscheduler.ui.model.TaskDetailsRequestParams;
import no.bekk.dbscheduler.ui.service.LogLogic;
import org.springframework.stereotype.Component;

@Component
public class Caching {

  private final Map taskStatusCache = new ConcurrentHashMap<>();
  private final List> taskDataCache = new ArrayList<>();
  private final Map logCache = new ConcurrentHashMap<>();

  public List> getExecutionsFromCacheOrDB(
      boolean isRefresh, Scheduler scheduler) {
    if (isRefresh || !taskDataCache.isEmpty()) {
      List> executions =
          getExecutionsFromDBWithoutUpdatingCache(scheduler);
      updateCache(executions);
      return executions;
    } else {
      return taskDataCache;
    }
  }

  public List> getExecutionsFromDBWithoutUpdatingCache(
      Scheduler scheduler) {
    List> executions = scheduler.getScheduledExecutions();
    executions.addAll(
        scheduler.getScheduledExecutions(ScheduledExecutionsFilter.all().withPicked(true)));
    return executions;
  }

  public void updateCache(List> executions) {
    taskStatusCache.clear();
    taskDataCache.clear();
    taskDataCache.addAll(executions);
    for (ScheduledExecution