Java tutorial
/** * The MIT License (MIT) * * Copyright (c) 2016 Jrard Devarulrajah * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.github.jrrdev.mantisbtsync.core.jobs.issues.writers; import java.util.List; import javax.sql.DataSource; import org.springframework.batch.item.ItemWriter; import org.springframework.batch.item.database.BeanPropertyItemSqlParameterSourceProvider; import org.springframework.batch.item.database.JdbcBatchItemWriter; import com.github.jrrdev.mantisbtsync.core.jobs.issues.beans.BugBean; import com.github.jrrdev.mantisbtsync.core.jobs.issues.beans.BugCustomFieldValue; /** * Writer used to upsert the custom field values related to * an issue. * Insert entries in mantis_custom_field_string_table table. * * @author jrrdev * */ public class BugCustomFieldsWriter implements ItemWriter<BugBean> { /** * Sub-writer used to write each item in the list of custom field values. */ private final JdbcBatchItemWriter<BugCustomFieldValue> writer; /** * SQL query used to perform the upsert. */ private static final String SQL_QUERY = "INSERT INTO mantis_custom_field_string_table\n" + " (field_id, bug_id, field_value)\n" + " VALUES (:fieldId, :bugId, :fieldValue)\n" + " ON DUPLICATE KEY UPDATE field_value = :fieldValue"; /** * Default constructor. */ public BugCustomFieldsWriter() { writer = new JdbcBatchItemWriter<BugCustomFieldValue>(); writer.setItemSqlParameterSourceProvider( new BeanPropertyItemSqlParameterSourceProvider<BugCustomFieldValue>()); writer.setSql(SQL_QUERY); writer.setAssertUpdates(false); } /** * {@inheritDoc} * @see org.springframework.batch.item.ItemWriter#write(java.util.List) */ @Override public void write(final List<? extends BugBean> items) throws Exception { if (items != null) { for (final BugBean bug : items) { if (bug.getCustomFields() != null) { writer.write(bug.getCustomFields()); } } } } /** * Check mandatory properties. */ public void afterPropertiesSet() { writer.afterPropertiesSet(); } /** * Set the datasource. * * @param dataSource * the datasource to set */ public void setDataSource(final DataSource dataSource) { writer.setDataSource(dataSource); } }