NetworkResources.java
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/*
Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/J is licensed under the terms of the GPLv2
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
this software, see the FOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.
This program is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software Foundation; version 2
of the License.
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 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.jdbc;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
class NetworkResources {
private final Socket mysqlConnection;
private final InputStream mysqlInput;
private final OutputStream mysqlOutput;
protected NetworkResources(Socket mysqlConnection, InputStream mysqlInput, OutputStream mysqlOutput) {
this.mysqlConnection = mysqlConnection;
this.mysqlInput = mysqlInput;
this.mysqlOutput = mysqlOutput;
}
/**
* Forcibly closes the underlying socket to MySQL.
*/
protected final void forceClose() {
try {
try {
if (this.mysqlInput != null) {
this.mysqlInput.close();
}
} finally {
if (this.mysqlConnection != null && !this.mysqlConnection.isClosed() && !this.mysqlConnection.isInputShutdown()) {
try {
this.mysqlConnection.shutdownInput();
} catch (UnsupportedOperationException ex) {
// ignore, some sockets do not support this method
}
}
}
} catch (IOException ioEx) {
// we can't do anything constructive about this
}
try {
try {
if (this.mysqlOutput != null) {
this.mysqlOutput.close();
}
} finally {
if (this.mysqlConnection != null && !this.mysqlConnection.isClosed() && !this.mysqlConnection.isOutputShutdown()) {
try {
this.mysqlConnection.shutdownOutput();
} catch (UnsupportedOperationException ex) {
// ignore, some sockets do not support this method
}
}
}
} catch (IOException ioEx) {
// we can't do anything constructive about this
}
try {
if (this.mysqlConnection != null) {
this.mysqlConnection.close();
}
} catch (IOException ioEx) {
// we can't do anything constructive about this
}
}
}