com.manning.siia.batch.PaymentWriter.java Source code

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Here is the source code for com.manning.siia.batch.PaymentWriter.java

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/*
 * Copyright 2012 the original author or authors.
 *
 * 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.manning.siia.batch;

import java.util.List;

import javax.sql.DataSource;

import org.springframework.batch.item.ItemWriter;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.simple.SimpleJdbcInsert;

/**
 * @author Marius Bogoevici
 */
public class PaymentWriter implements ItemWriter<Payment> {

    private SimpleJdbcInsert paymentInsert;
    private JdbcTemplate accountUpdate;

    public PaymentWriter(DataSource dataSource) {
        paymentInsert = new SimpleJdbcInsert(dataSource).withTableName("PAYMENTS").usingColumns("RECIPIENT",
                "PAYEE", "AMOUNT", "PAY_DATE");
        accountUpdate = new JdbcTemplate(dataSource);
    }

    @Override
    public void write(List<? extends Payment> payments) throws Exception {
        for (Payment payment : payments) {
            MapSqlParameterSource parameterSource = new MapSqlParameterSource();
            parameterSource.addValue("RECIPIENT", payment.getDestinationAccountNo())
                    .addValue("PAYEE", payment.getSourceAccountNo()).addValue("AMOUNT", payment.getAmount())
                    .addValue("DATE", payment.getDate());
            accountUpdate.update("UPDATE ACCOUNTS SET BALANCE = BALANCE + ? WHERE ID = ?", payment.getAmount(),
                    payment.getDestinationAccountNo());
            accountUpdate.update("UPDATE ACCOUNTS SET BALANCE = BALANCE - ? WHERE ID = ?", payment.getAmount(),
                    payment.getSourceAccountNo());
            paymentInsert.execute(parameterSource);
            System.out.println("Executing the step " + payment.getDate());
        }
    }
}