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Simple persistent scheduler for scheduled tasks, recurring or ad-hoc.

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/*
 * Copyright (C) Gustav Karlsson
 *
 * 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 com.github.kagkarlsson.scheduler.task;

public interface TaskDescriptor extends HasTaskName {

  String getTaskName();

  Class getDataClass();

  static TaskDescriptor of(String name) {
    return TaskDescriptor.of(name, Void.class);
  }

  static  TaskDescriptor of(String name, Class dataClass) {
    return new TaskDescriptor.SimpleTaskDescriptor<>(name, dataClass);
  }

  default TaskInstance.Builder instance(String id) {
    return new TaskInstance.Builder<>(getTaskName(), id);
  }

  default TaskInstanceId instanceId(String id) {
    return TaskInstanceId.of(getTaskName(), id);
  }

  class SimpleTaskDescriptor implements TaskDescriptor {

    private final String name;
    private final Class dataClass;

    public SimpleTaskDescriptor(String name, Class dataClass) {
      this.name = name;
      this.dataClass = dataClass;
    }

    @Override
    public String getTaskName() {
      return name;
    }

    @Override
    public Class getDataClass() {
      return dataClass;
    }
  }
}