JobExecutionMultipleShardingContext.java

/**
 * Copyright 2016 vip.com.
 * <p>
 * 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.
 * </p>
 */

package com.vip.saturn.job.basic;

import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.beanutils.BeanUtils;
import com.vip.saturn.job.exception.JobException;

/**
 * 作业运行时多片分片上下文.
 * @author dylan.xue
 */
public class JobExecutionMultipleShardingContext extends AbstractJobExecutionShardingContext {
    
    private static int initCollectionSize = 64;
    
    /**
     * 运行在本作业服务器的分片序列号集合.
     */

    private List<Integer> shardingItems = new ArrayList<>(initCollectionSize);
    
    /**
     * 运行在本作业项的分片序列号和个性化参数列表.
     */
    private Map<Integer, String> shardingItemParameters = new HashMap<>(initCollectionSize);
    
    /**
     * 数据分片项和数据处理位置Map.
     */

    private Map<Integer, String> offsets = new HashMap<>();
    		
    public static int getInitCollectionSize() {
		return initCollectionSize;
	}

	public static void setInitCollectionSize(int initCollectionSize) {
		JobExecutionMultipleShardingContext.initCollectionSize = initCollectionSize;
	}

	public List<Integer> getShardingItems() {
		return shardingItems;
	}

	public void setShardingItems(List<Integer> shardingItems) {
		this.shardingItems = shardingItems;
	}

	public Map<Integer, String> getShardingItemParameters() {
		return shardingItemParameters;
	}

	public void setShardingItemParameters(Map<Integer, String> shardingItemParameters) {
		this.shardingItemParameters = shardingItemParameters;
	}

	public Map<Integer, String> getOffsets() {
		return offsets;
	}

	public void setOffsets(Map<Integer, String> offsets) {
		this.offsets = offsets;
	}

	/**
     * 根据分片项获取单分片作业运行时上下文.
     * 
     * @param item 分片项
     * @return 单分片作业运行时上下文
     */
    public JobExecutionSingleShardingContext createJobExecutionSingleShardingContext(final int item) {
        JobExecutionSingleShardingContext result = new JobExecutionSingleShardingContext();
        try {
            BeanUtils.copyProperties(result, this);
        } catch (final IllegalAccessException | InvocationTargetException ex) {
            throw new JobException(ex);
        }
        result.setShardingItem(item);
        result.setShardingItemParameter(shardingItemParameters.get(item));
        result.setOffset(offsets.get(item));
        return result;
    }
    
    @Override
    public String toString() {
        return String.format(
            "jobName: %s, shardingTotalCount: %s, shardingItems: %s, shardingItemParameters: %s, jobParameter: %s",
                getJobName(), getShardingTotalCount(), shardingItems, shardingItemParameters, getJobParameter()
            );
    }
}