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/* |
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* This file is part of Araknemu. |
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* |
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* Araknemu is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser 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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* |
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* Araknemu 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 Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with Araknemu. If not, see <https://www.gnu.org/licenses/>. |
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* |
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* Copyright (c) 2017-2020 Vincent Quatrevieux |
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*/ |
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package fr.quatrevieux.araknemu.core.dbal; |
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import org.apache.logging.log4j.Logger; |
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import java.sql.Connection; |
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import java.sql.SQLException; |
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import java.sql.SQLRecoverableException; |
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/** |
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* Add auto-reconnect on connection pool |
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*/ |
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public final class AutoReconnectConnectionPool implements ConnectionPool { |
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private final ConnectionPool pool; |
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private final Logger logger; |
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1 |
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public AutoReconnectConnectionPool(ConnectionPool pool, Logger logger) { |
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1 |
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this.pool = pool; |
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this.logger = logger; |
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} |
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@Override |
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public void initialize() throws SQLException { |
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1 |
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pool.initialize(); |
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} |
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@Override |
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public Connection acquire() throws SQLException { |
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1 |
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return pool.acquire(); |
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} |
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@Override |
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public void release(Connection connection) { |
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pool.release(connection); |
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} |
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@Override |
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public int size() { |
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1 |
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return pool.size(); |
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} |
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@Override |
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public <T> T execute(Task<T> task) throws SQLException { |
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1 |
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SQLException lastError = null; |
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for (int i = pool.size(); i >= 0; --i) { |
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try { |
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return pool.execute(task); |
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} catch (SQLException e) { |
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if (!causedByConnectionClosed(e)) { |
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throw e; |
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} |
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logger.warn("Recoverable SQL error occurs. Retry on a new connection"); |
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lastError = e; |
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} |
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} |
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throw new SQLException("Max retry limit reached", lastError); |
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} |
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@Override |
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public void close() throws Exception { |
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pool.close(); |
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} |
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/** |
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* Check if the exception is caused by a closed connection |
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*/ |
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private boolean causedByConnectionClosed(SQLException exception) { |
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return exception instanceof SQLRecoverableException |
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1 |
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|| (exception.getMessage() != null && exception.getMessage().toLowerCase().contains("connection closed")) |
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; |
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} |
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} |
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Arakne /
Araknemu
