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JDBC driver for MariaDB and MySQL
/*
*
* MariaDB Client for Java
*
* Copyright (c) 2012-2014 Monty Program Ab.
* Copyright (c) 2015-2020 MariaDB Corporation Ab.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with this library; if not, write to Monty Program Ab [email protected].
*
* This particular MariaDB Client for Java file is work
* derived from a Drizzle-JDBC. Drizzle-JDBC file which is covered by subject to
* the following copyright and notice provisions:
*
* Copyright (c) 2009-2011, Marcus Eriksson
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* Neither the name of the driver nor the names of its contributors may not be
* used to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
*/
package org.mariadb.jdbc.internal.protocol;
import static org.mariadb.jdbc.internal.util.SqlStates.INTERRUPTED_EXCEPTION;
import java.sql.SQLException;
import java.sql.SQLNonTransientConnectionException;
import java.sql.SQLTransientConnectionException;
import java.util.List;
import java.util.concurrent.Callable;
import org.mariadb.jdbc.internal.com.read.dao.Results;
import org.mariadb.jdbc.internal.com.send.parameters.ParameterHolder;
import org.mariadb.jdbc.internal.util.BulkStatus;
import org.mariadb.jdbc.internal.util.dao.PrepareResult;
public class AsyncMultiRead implements Callable {
private final BulkStatus status;
private final int sendCmdInitialCounter;
private final Protocol protocol;
private final AbstractMultiSend bulkSend;
private final List parametersList;
private final List queries;
private final Results results;
private final int paramCount;
private final AsyncMultiReadResult asyncMultiReadResult;
/**
* Read results async to avoid local and remote networking stack buffer overflow "lock".
*
* @param status bulk status
* @param protocol protocol
* @param bulkSend bulk sender object
* @param paramCount number of parameters
* @param results execution result
* @param parametersList parameter list
* @param queries queries
* @param prepareResult prepare result
*/
public AsyncMultiRead(
BulkStatus status,
Protocol protocol,
AbstractMultiSend bulkSend,
int paramCount,
Results results,
List parametersList,
List queries,
PrepareResult prepareResult) {
this.status = status;
this.sendCmdInitialCounter = status.sendCmdCounter - 1;
this.protocol = protocol;
this.bulkSend = bulkSend;
this.paramCount = paramCount;
this.results = results;
this.parametersList = parametersList;
this.queries = queries;
this.asyncMultiReadResult = new AsyncMultiReadResult(prepareResult);
}
@Override
public AsyncMultiReadResult call() throws Exception {
// avoid synchronisation of calls for write and read
// since technically, getResult can be called before the write is send.
// Other solution would have been to synchronised write and read, but would have been less
// performant,
// just to have this timeout according to set value
int initialTimeout = protocol.getTimeout();
if (initialTimeout != 0) {
protocol.changeSocketSoTimeout(0);
}
// read all corresponding results
int counter = 0;
// ensure to not finished loop while all bulk has not been send
outerloop:
while (!status.sendEnded || counter < status.sendSubCmdCounter) {
// read results for each send data
while (counter < status.sendSubCmdCounter) {
try {
protocol.getResult(results);
} catch (SQLException qex) {
if (qex instanceof SQLNonTransientConnectionException
|| qex instanceof SQLTransientConnectionException) {
asyncMultiReadResult.setException(qex);
break outerloop;
}
if (asyncMultiReadResult.getException() == null) {
asyncMultiReadResult.setException(
bulkSend.handleResultException(
qex,
results,
parametersList,
queries,
counter,
sendCmdInitialCounter,
paramCount,
asyncMultiReadResult.getPrepareResult()));
}
}
counter++;
if (Thread.currentThread().isInterrupted()) {
asyncMultiReadResult.setException(
new SQLException(
"Interrupted reading responses ", INTERRUPTED_EXCEPTION.getSqlState(), -1));
break;
}
}
}
if (initialTimeout != 0) {
protocol.changeSocketSoTimeout(initialTimeout);
}
return asyncMultiReadResult;
}
}