BestEffortsDeliveryJob.java

/*
 * Copyright 1999-2015 dangdang.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.dangdang.ddframe.rdb.transaction.soft.bed;

import com.dangdang.ddframe.job.api.JobExecutionMultipleShardingContext;
import com.dangdang.ddframe.job.plugin.job.type.dataflow.AbstractIndividualThroughputDataFlowElasticJob;
import com.dangdang.ddframe.rdb.transaction.soft.exception.TransactionCompensationException;
import com.dangdang.ddframe.rdb.transaction.soft.storage.TransactionLog;
import com.dangdang.ddframe.rdb.transaction.soft.storage.TransactionLogStorage;
import lombok.Setter;
import lombok.extern.slf4j.Slf4j;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;

/**
 * 最大努力送达型异步作业.
 * 
 * @author zhangliang
 * @author caohao
 */
@Slf4j
public class BestEffortsDeliveryJob extends AbstractIndividualThroughputDataFlowElasticJob<TransactionLog> {
    
    @Setter
    private BestEffortsDeliveryConfiguration bedConfig;
    
    @Setter
    private TransactionLogStorage transactionLogStorage;
    
    @Override
    public List<TransactionLog> fetchData(final JobExecutionMultipleShardingContext context) {
        return transactionLogStorage.findEligibleTransactionLogs(context.getFetchDataCount(), 
            bedConfig.getJobConfig().getMaxDeliveryTryTimes(), bedConfig.getJobConfig().getMaxDeliveryTryDelayMillis());
    }
    
    @Override
    public boolean processData(final JobExecutionMultipleShardingContext context, final TransactionLog data) {
        try (
            Connection conn = bedConfig.getTargetDataSource(data.getDataSource()).getConnection()) {
            transactionLogStorage.processData(conn, data, bedConfig.getJobConfig().getMaxDeliveryTryTimes());
        } catch (final SQLException | TransactionCompensationException ex) {
            log.error(String.format("Async delivery times %s error, max try times is %s, exception is %s", data.getAsyncDeliveryTryTimes() + 1, 
                bedConfig.getJobConfig().getMaxDeliveryTryTimes(), ex.getMessage()));
            return false;
        }
        return true;
    }
    
    @Override
    public boolean isStreamingProcess() {
        return false;
    }
}