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/*
Copyright (c) 2008, 2015, 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 testsuite;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.SocketException;
import java.net.SocketTimeoutException;
import java.nio.channels.SocketChannel;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import com.mysql.jdbc.NonRegisteringDriver;
import com.mysql.jdbc.SocketFactory;
import com.mysql.jdbc.StandardSocketFactory;
/**
* Configure "socketFactory" to use this class in your JDBC URL, and it will operate as normal, unless you map some host aliases to actual IP addresses, and
* then have the test driver call hangOnConnect/Read/Write() which simulate the given failure condition for the host with the <b>alias</b> argument, and will
* honor connect or socket timeout properties.
*
* You can also cause a host to be immediately-downed by calling downHost() with an alias.
*
* ATTENTION! This class is *NOT* thread safe.
*/
public class UnreliableSocketFactory extends StandardSocketFactory {
public static final String STATUS_UNKNOWN = "?";
public static final String STATUS_CONNECTED = "/";
public static final String STATUS_FAILED = "\\";
public static final long DEFAULT_TIMEOUT_MILLIS = 10 * 60 * 1000; // ugh
private static final Map<String, String> MAPPED_HOSTS = new HashMap<String, String>();
static final Set<String> HUNG_READ_HOSTS = new HashSet<String>();
static final Set<String> HUNG_WRITE_HOSTS = new HashSet<String>();
static final Set<String> HUNG_CONNECT_HOSTS = new HashSet<String>();
static final Set<String> IMMEDIATELY_DOWNED_HOSTS = new HashSet<String>();
static final List<String> CONNECTION_ATTEMPTS = new LinkedList<String>();
private String hostname;
private int portNumber;
private Properties props;
public static String getHostConnectedStatus(String host) {
return STATUS_CONNECTED + host;
}
public static String getHostFailedStatus(String host) {
return STATUS_FAILED + host;
}
public static String getHostUnknownStatus(String host) {
return STATUS_FAILED + host;
}
public static void flushAllStaticData() {
IMMEDIATELY_DOWNED_HOSTS.clear();
HUNG_CONNECT_HOSTS.clear();
HUNG_READ_HOSTS.clear();
HUNG_WRITE_HOSTS.clear();
flushConnectionAttempts();
}
public static void flushConnectionAttempts() {
CONNECTION_ATTEMPTS.clear();
}
public static void mapHost(String alias, String orig) {
MAPPED_HOSTS.put(alias, orig);
}
public static void hangOnRead(String hostname) {
HUNG_READ_HOSTS.add(hostname);
}
public static void dontHangOnRead(String hostname) {
HUNG_READ_HOSTS.remove(hostname);
}
public static void hangOnWrite(String hostname) {
HUNG_WRITE_HOSTS.add(hostname);
}
public static void dontHangOnWrite(String hostname) {
HUNG_WRITE_HOSTS.remove(hostname);
}
public static void hangOnConnect(String hostname) {
HUNG_CONNECT_HOSTS.add(hostname);
}
public static void dontHangOnConnect(String hostname) {
HUNG_CONNECT_HOSTS.remove(hostname);
}
public static void downHost(String hostname) {
IMMEDIATELY_DOWNED_HOSTS.add(hostname);
}
public static void dontDownHost(String hostname) {
IMMEDIATELY_DOWNED_HOSTS.remove(hostname);
}
public static String getHostFromLastConnection() {
return getHostFromPastConnection(1);
}
public static String getHostFromPastConnection(int pos) {
pos = Math.abs(pos);
if (pos == 0 || CONNECTION_ATTEMPTS.isEmpty() || CONNECTION_ATTEMPTS.size() < pos) {
return null;
}
return CONNECTION_ATTEMPTS.get(CONNECTION_ATTEMPTS.size() - pos);
}
public static List<String> getHostsFromAllConnections() {
return getHostsFromLastConnections(CONNECTION_ATTEMPTS.size());
}
public static List<String> getHostsFromLastConnections(int count) {
count = Math.abs(count);
int lBound = Math.max(0, CONNECTION_ATTEMPTS.size() - count);
return CONNECTION_ATTEMPTS.subList(lBound, CONNECTION_ATTEMPTS.size());
}
public static boolean isConnected() {
String lastHost = getHostFromLastConnection();
return lastHost == null ? false : lastHost.startsWith(STATUS_CONNECTED);
}
@Override
public Socket connect(String host_name, int port_number, Properties prop) throws SocketException, IOException {
this.hostname = host_name;
this.portNumber = port_number;
this.props = prop;
Socket socket = null;
String result = STATUS_UNKNOWN;
try {
socket = getNewSocket();
result = STATUS_CONNECTED;
} catch (SocketException e) {
result = STATUS_FAILED;
throw e;
} catch (IOException e) {
result = STATUS_FAILED;
throw e;
} finally {
CONNECTION_ATTEMPTS.add(result + host_name);
}
return socket;
}
private Socket getNewSocket() throws SocketException, IOException {
if (IMMEDIATELY_DOWNED_HOSTS.contains(this.hostname)) {
sleepMillisForProperty(this.props, "connectTimeout");
throw new SocketTimeoutException();
}
String hostnameToConnectTo = MAPPED_HOSTS.get(this.hostname);
if (hostnameToConnectTo == null) {
hostnameToConnectTo = this.hostname;
}
if (NonRegisteringDriver.isHostPropertiesList(hostnameToConnectTo)) {
Properties hostSpecificProps = NonRegisteringDriver.expandHostKeyValues(hostnameToConnectTo);
String protocol = hostSpecificProps.getProperty(NonRegisteringDriver.PROTOCOL_PROPERTY_KEY);
if ("unix".equalsIgnoreCase(protocol)) {
SocketFactory factory;
try {
factory = (SocketFactory) Class.forName("org.newsclub.net.mysql.AFUNIXDatabaseSocketFactory").newInstance();
} catch (InstantiationException e) {
throw new SocketException(e.getMessage());
} catch (IllegalAccessException e) {
throw new SocketException(e.getMessage());
} catch (ClassNotFoundException e) {
throw new SocketException(e.getMessage());
}
String path = hostSpecificProps.getProperty(NonRegisteringDriver.PATH_PROPERTY_KEY);
if (path != null) {
hostSpecificProps.setProperty("junixsocket.file", path);
}
return new HangingSocket(factory.connect(hostnameToConnectTo, this.portNumber, hostSpecificProps), this.props, this.hostname);
}
}
return new HangingSocket(super.connect(hostnameToConnectTo, this.portNumber, this.props), this.props, this.hostname);
}
@Override
public Socket afterHandshake() throws SocketException, IOException {
return getNewSocket();
}
@Override
public Socket beforeHandshake() throws SocketException, IOException {
return getNewSocket();
}
static void sleepMillisForProperty(Properties props, String name) {
try {
Thread.sleep(Long.parseLong(props.getProperty(name, String.valueOf(DEFAULT_TIMEOUT_MILLIS))));
} catch (NumberFormatException e) {
throw new RuntimeException(e);
} catch (InterruptedException e) {
// ignore
}
}
class HangingSocket extends Socket {
@Override
public void bind(SocketAddress bindpoint) throws IOException {
this.underlyingSocket.bind(bindpoint);
}
@Override
public synchronized void close() throws IOException {
this.underlyingSocket.close();
}
@Override
public SocketChannel getChannel() {
return this.underlyingSocket.getChannel();
}
@Override
public InetAddress getInetAddress() {
return this.underlyingSocket.getInetAddress();
}
@Override
public InputStream getInputStream() throws IOException {
return new HangingInputStream(this.underlyingSocket.getInputStream(), this.props, this.aliasedHostname);
}
@Override
public boolean getKeepAlive() throws SocketException {
return this.underlyingSocket.getKeepAlive();
}
@Override
public InetAddress getLocalAddress() {
return this.underlyingSocket.getLocalAddress();
}
@Override
public int getLocalPort() {
return this.underlyingSocket.getLocalPort();
}
@Override
public SocketAddress getLocalSocketAddress() {
return this.underlyingSocket.getLocalSocketAddress();
}
@Override
public boolean getOOBInline() throws SocketException {
return this.underlyingSocket.getOOBInline();
}
@Override
public OutputStream getOutputStream() throws IOException {
return new HangingOutputStream(this.underlyingSocket.getOutputStream(), this.props, this.aliasedHostname);
}
@Override
public int getPort() {
return this.underlyingSocket.getPort();
}
@Override
public synchronized int getReceiveBufferSize() throws SocketException {
return this.underlyingSocket.getReceiveBufferSize();
}
@Override
public SocketAddress getRemoteSocketAddress() {
return this.underlyingSocket.getRemoteSocketAddress();
}
@Override
public boolean getReuseAddress() throws SocketException {
return this.underlyingSocket.getReuseAddress();
}
@Override
public synchronized int getSendBufferSize() throws SocketException {
return this.underlyingSocket.getSendBufferSize();
}
@Override
public int getSoLinger() throws SocketException {
return this.underlyingSocket.getSoLinger();
}
@Override
public synchronized int getSoTimeout() throws SocketException {
return this.underlyingSocket.getSoTimeout();
}
@Override
public boolean getTcpNoDelay() throws SocketException {
return this.underlyingSocket.getTcpNoDelay();
}
@Override
public int getTrafficClass() throws SocketException {
return this.underlyingSocket.getTrafficClass();
}
@Override
public boolean isBound() {
return this.underlyingSocket.isBound();
}
@Override
public boolean isClosed() {
return this.underlyingSocket.isClosed();
}
@Override
public boolean isConnected() {
return this.underlyingSocket.isConnected();
}
@Override
public boolean isInputShutdown() {
return this.underlyingSocket.isInputShutdown();
}
@Override
public boolean isOutputShutdown() {
return this.underlyingSocket.isOutputShutdown();
}
@Override
public void sendUrgentData(int data) throws IOException {
this.underlyingSocket.sendUrgentData(data);
}
@Override
public void setKeepAlive(boolean on) throws SocketException {
this.underlyingSocket.setKeepAlive(on);
}
@Override
public void setOOBInline(boolean on) throws SocketException {
this.underlyingSocket.setOOBInline(on);
}
@Override
public synchronized void setReceiveBufferSize(int size) throws SocketException {
this.underlyingSocket.setReceiveBufferSize(size);
}
@Override
public void setReuseAddress(boolean on) throws SocketException {
this.underlyingSocket.setReuseAddress(on);
}
@Override
public synchronized void setSendBufferSize(int size) throws SocketException {
this.underlyingSocket.setSendBufferSize(size);
}
@Override
public void setSoLinger(boolean on, int linger) throws SocketException {
this.underlyingSocket.setSoLinger(on, linger);
}
@Override
public synchronized void setSoTimeout(int timeout) throws SocketException {
this.underlyingSocket.setSoTimeout(timeout);
}
@Override
public void setTcpNoDelay(boolean on) throws SocketException {
this.underlyingSocket.setTcpNoDelay(on);
}
@Override
public void setTrafficClass(int tc) throws SocketException {
this.underlyingSocket.setTrafficClass(tc);
}
@Override
public void shutdownInput() throws IOException {
this.underlyingSocket.shutdownInput();
}
@Override
public void shutdownOutput() throws IOException {
this.underlyingSocket.shutdownOutput();
}
@Override
public String toString() {
return this.underlyingSocket.toString();
}
final Socket underlyingSocket;
final Properties props;
final String aliasedHostname;
HangingSocket(Socket realSocket, Properties props, String aliasedHostname) {
this.underlyingSocket = realSocket;
this.props = props;
this.aliasedHostname = aliasedHostname;
}
}
static class HangingInputStream extends InputStream {
final InputStream underlyingInputStream;
final Properties props;
final String aliasedHostname;
HangingInputStream(InputStream realInputStream, Properties props, String aliasedHostname) {
this.underlyingInputStream = realInputStream;
this.props = props;
this.aliasedHostname = aliasedHostname;
}
@Override
public int available() throws IOException {
return this.underlyingInputStream.available();
}
@Override
public void close() throws IOException {
this.underlyingInputStream.close();
}
@Override
public synchronized void mark(int readlimit) {
this.underlyingInputStream.mark(readlimit);
}
@Override
public boolean markSupported() {
return this.underlyingInputStream.markSupported();
}
@Override
public synchronized void reset() throws IOException {
this.underlyingInputStream.reset();
}
@Override
public long skip(long n) throws IOException {
failIfRequired();
return this.underlyingInputStream.skip(n);
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
failIfRequired();
return this.underlyingInputStream.read(b, off, len);
}
@Override
public int read(byte[] b) throws IOException {
failIfRequired();
return this.underlyingInputStream.read(b);
}
@Override
public int read() throws IOException {
failIfRequired();
return this.underlyingInputStream.read();
}
private void failIfRequired() throws SocketTimeoutException {
if (HUNG_READ_HOSTS.contains(this.aliasedHostname) || IMMEDIATELY_DOWNED_HOSTS.contains(this.aliasedHostname)) {
sleepMillisForProperty(this.props, "socketTimeout");
throw new SocketTimeoutException();
}
}
}
static class HangingOutputStream extends OutputStream {
final Properties props;
final String aliasedHostname;
final OutputStream underlyingOutputStream;
HangingOutputStream(OutputStream realOutputStream, Properties props, String aliasedHostname) {
this.underlyingOutputStream = realOutputStream;
this.props = props;
this.aliasedHostname = aliasedHostname;
}
@Override
public void close() throws IOException {
failIfRequired();
this.underlyingOutputStream.close();
}
@Override
public void flush() throws IOException {
this.underlyingOutputStream.flush();
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
failIfRequired();
this.underlyingOutputStream.write(b, off, len);
}
@Override
public void write(byte[] b) throws IOException {
failIfRequired();
this.underlyingOutputStream.write(b);
}
@Override
public void write(int b) throws IOException {
failIfRequired();
this.underlyingOutputStream.write(b);
}
private void failIfRequired() throws SocketTimeoutException {
if (HUNG_WRITE_HOSTS.contains(this.aliasedHostname) || IMMEDIATELY_DOWNED_HOSTS.contains(this.aliasedHostname)) {
sleepMillisForProperty(this.props, "socketTimeout");
throw new SocketTimeoutException();
}
}
}
}