/*
 * 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.flink.runtime.executiongraph;

import org.apache.flink.configuration.Configuration;
import org.apache.flink.runtime.jobgraph.JobVertexID;
import org.apache.flink.util.Preconditions;

import java.io.Serializable;

/**
 * Container class for operator/task specific information which are stored at the
 * {@link ExecutionJobVertex}. This information is shared by all sub tasks of this operator.
 */
public class TaskInformation implements Serializable {

	private static final long serialVersionUID = -9006218793155953789L;

	/** Job vertex id of the associated job vertex */
	private final JobVertexID jobVertexId;

	/** Name of the task */
	private final String taskName;

	/** The number of subtasks for this operator */
	private final int numberOfSubtasks;

	/** The maximum parallelism == number of key groups */
	private final int maxNumberOfSubtaks;

	/** Class name of the invokable to run */
	private final String invokableClassName;

	/** Configuration for the task */
	private final Configuration taskConfiguration;

	public TaskInformation(
			JobVertexID jobVertexId,
			String taskName,
			int numberOfSubtasks,
			int maxNumberOfSubtaks,
			String invokableClassName,
			Configuration taskConfiguration) {
		this.jobVertexId = Preconditions.checkNotNull(jobVertexId);
		this.taskName = Preconditions.checkNotNull(taskName);
		this.numberOfSubtasks = Preconditions.checkNotNull(numberOfSubtasks);
		this.maxNumberOfSubtaks = Preconditions.checkNotNull(maxNumberOfSubtaks);
		this.invokableClassName = Preconditions.checkNotNull(invokableClassName);
		this.taskConfiguration = Preconditions.checkNotNull(taskConfiguration);
	}

	public JobVertexID getJobVertexId() {
		return jobVertexId;
	}

	public String getTaskName() {
		return taskName;
	}

	public int getNumberOfSubtasks() {
		return numberOfSubtasks;
	}

	public int getMaxNumberOfSubtaks() {
		return maxNumberOfSubtaks;
	}

	public String getInvokableClassName() {
		return invokableClassName;
	}

	public Configuration getTaskConfiguration() {
		return taskConfiguration;
	}
}