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187 lines
6.6 KiB
187 lines
6.6 KiB
/*
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This file is part of Libresonic.
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Libresonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Libresonic is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Libresonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2016 (C) Libresonic Authors
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Based upon Subsonic, Copyright 2009 (C) Sindre Mehus
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*/
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package org.libresonic.player.dao;
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import org.libresonic.player.Logger;
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import org.springframework.jdbc.core.JdbcTemplate;
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import org.springframework.jdbc.core.RowMapper;
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import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
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import java.util.Date;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.TimeUnit;
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/**
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* Abstract superclass for all DAO's.
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*
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* @author Sindre Mehus
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*/
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public class AbstractDao {
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private static final Logger LOG = Logger.getLogger(AbstractDao.class);
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private DaoHelper daoHelper;
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/**
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* Returns a JDBC template for performing database operations.
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* @return A JDBC template.
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*/
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public JdbcTemplate getJdbcTemplate() {
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return daoHelper.getJdbcTemplate();
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}
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/**
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* Similar to {@link #getJdbcTemplate()}, but with named parameters.
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*/
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public NamedParameterJdbcTemplate getNamedParameterJdbcTemplate() {
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return daoHelper.getNamedParameterJdbcTemplate();
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}
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protected String questionMarks(String columns) {
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int count = columns.split(", ").length;
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StringBuilder builder = new StringBuilder();
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for (int i = 0; i < count; i++) {
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builder.append('?');
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if (i < count - 1) {
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builder.append(", ");
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}
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}
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return builder.toString();
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}
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protected String prefix(String columns, String prefix) {
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StringBuilder builder = new StringBuilder();
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for (String s : columns.split(", ")) {
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builder.append(prefix).append(".").append(s).append(",");
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}
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if (builder.length() > 0) {
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builder.setLength(builder.length() - 1);
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}
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return builder.toString();
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}
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protected int update(String sql, Object... args) {
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long t = System.nanoTime();
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int result = getJdbcTemplate().update(sql, args);
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log(sql, t);
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return result;
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}
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private void log(String sql, long startTimeNano) {
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long millis = (System.nanoTime() - startTimeNano) / 1000000L;
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// Log queries that take more than 2 seconds.
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if (millis > TimeUnit.SECONDS.toMillis(2L)) {
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LOG.debug(millis + " ms: " + sql);
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}
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}
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protected <T> List<T> query(String sql, RowMapper rowMapper, Object... args) {
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long t = System.nanoTime();
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List<T> result = getJdbcTemplate().query(sql, args, rowMapper);
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log(sql, t);
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return result;
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}
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protected <T> List<T> namedQuery(String sql, RowMapper rowMapper, Map<String, Object> args) {
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long t = System.nanoTime();
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List<T> result = getNamedParameterJdbcTemplate().query(sql, args, rowMapper);
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log(sql, t);
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return result;
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}
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protected <T> List<T> namedQueryWithLimit(String sql, RowMapper<T> rowMapper, Map<String, Object> args, int limit) {
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long t = System.nanoTime();
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JdbcTemplate jdbcTemplate = new JdbcTemplate(daoHelper.getDataSource());
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jdbcTemplate.setMaxRows(limit);
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NamedParameterJdbcTemplate namedTemplate = new NamedParameterJdbcTemplate(jdbcTemplate);
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List<T> result = namedTemplate.query(sql, args, rowMapper);
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log(sql, t);
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return result;
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}
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protected List<String> queryForStrings(String sql, Object... args) {
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long t = System.nanoTime();
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List<String> result = getJdbcTemplate().queryForList(sql, args, String.class);
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log(sql, t);
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return result;
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}
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protected List<Integer> queryForInts(String sql, Object... args) {
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long t = System.nanoTime();
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List<Integer> result = getJdbcTemplate().queryForList(sql, args, Integer.class);
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log(sql, t);
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return result;
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}
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protected List<String> namedQueryForStrings(String sql, Map<String, Object> args) {
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long t = System.nanoTime();
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List<String> result = getNamedParameterJdbcTemplate().queryForList(sql, args, String.class);
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log(sql, t);
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return result;
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}
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protected Integer queryForInt(String sql, Integer defaultValue, Object... args) {
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long t = System.nanoTime();
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List<Integer> list = getJdbcTemplate().queryForList(sql, args, Integer.class);
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Integer result = list.isEmpty() ? defaultValue : list.get(0) == null ? defaultValue : list.get(0);
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log(sql, t);
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return result;
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}
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protected Integer namedQueryForInt(String sql, Integer defaultValue, Map<String, Object> args) {
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long t = System.nanoTime();
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List<Integer> list = getNamedParameterJdbcTemplate().queryForList(sql, args, Integer.class);
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Integer result = list.isEmpty() ? defaultValue : list.get(0) == null ? defaultValue : list.get(0);
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log(sql, t);
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return result;
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}
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protected Date queryForDate(String sql, Date defaultValue, Object... args) {
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long t = System.nanoTime();
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List<Date> list = getJdbcTemplate().queryForList(sql, args, Date.class);
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Date result = list.isEmpty() ? defaultValue : list.get(0) == null ? defaultValue : list.get(0);
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log(sql, t);
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return result;
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}
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protected Long queryForLong(String sql, Long defaultValue, Object... args) {
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long t = System.nanoTime();
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List<Long> list = getJdbcTemplate().queryForList(sql, args, Long.class);
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Long result = list.isEmpty() ? defaultValue : list.get(0) == null ? defaultValue : list.get(0);
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log(sql, t);
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return result;
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}
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protected <T> T queryOne(String sql, RowMapper rowMapper, Object... args) {
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List<T> list = query(sql, rowMapper, args);
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return list.isEmpty() ? null : list.get(0);
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}
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protected <T> T namedQueryOne(String sql, RowMapper rowMapper, Map<String, Object> args) {
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List<T> list = namedQuery(sql, rowMapper, args);
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return list.isEmpty() ? null : list.get(0);
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}
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public void setDaoHelper(DaoHelper daoHelper) {
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this.daoHelper = daoHelper;
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}
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}
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