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JDBC Type 4 driver for MySQL
/*
* Copyright (c) 2015, 2020, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* This program 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 General Public License, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj.protocol.x;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import com.google.protobuf.GeneratedMessageV3;
import com.mysql.cj.exceptions.WrongArgumentException;
import com.mysql.cj.protocol.MessageListener;
import com.mysql.cj.protocol.ProtocolEntity;
import com.mysql.cj.protocol.ProtocolEntityFactory;
import com.mysql.cj.protocol.ResultBuilder;
import com.mysql.cj.x.protobuf.Mysqlx.Error;
/**
* A {@link MessageListener} to handle result data and propagate it to a {@link ResultBuilder}.
*/
public class ResultMessageListener implements MessageListener {
private ResultBuilder resultBuilder;
private CompletableFuture future;
private Map, ProtocolEntityFactory> messageToProtocolEntityFactory = new HashMap<>();
public ResultMessageListener(
Map, ProtocolEntityFactory> messageToProtocolEntityFactory,
ResultBuilder resultBuilder, CompletableFuture future) {
this.messageToProtocolEntityFactory = messageToProtocolEntityFactory;
this.resultBuilder = resultBuilder;
this.future = future;
}
@SuppressWarnings("unchecked")
public boolean processMessage(XMessage message) {
Class msgClass = (Class) message.getMessage().getClass();
if (Error.class.equals(msgClass)) {
this.future.completeExceptionally(new XProtocolError(Error.class.cast(message.getMessage())));
} else if (!this.messageToProtocolEntityFactory.containsKey(msgClass)) {
this.future.completeExceptionally(new WrongArgumentException("Unhandled msg class (" + msgClass + ") + msg=" + message.getMessage()));
} else {
if (!this.resultBuilder.addProtocolEntity(this.messageToProtocolEntityFactory.get(msgClass).createFromMessage(message))) {
return false;
}
this.future.complete((R) this.resultBuilder.build());
}
return true; /* done reading */
}
public void error(Throwable ex) {
this.future.completeExceptionally(ex);
}
}