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/*
* Copyright (c) 2019, 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.conf.url;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import com.mysql.cj.Messages;
import com.mysql.cj.conf.BooleanPropertyDefinition;
import com.mysql.cj.conf.ConnectionUrl;
import com.mysql.cj.conf.ConnectionUrlParser;
import com.mysql.cj.conf.HostInfo;
import com.mysql.cj.conf.HostsListView;
import com.mysql.cj.conf.PropertyKey;
import com.mysql.cj.exceptions.ExceptionFactory;
import com.mysql.cj.exceptions.InvalidConnectionAttributeException;
import com.mysql.cj.util.StringUtils;
public class LoadBalanceDnsSrvConnectionUrl extends ConnectionUrl {
private static final String DEFAULT_HOST = "";
private static final int DEFAULT_PORT = HostInfo.NO_PORT;
/**
* Constructs an instance of {@link LoadBalanceDnsSrvConnectionUrl}, performing all the required initializations and validations.
*
* @param connStrParser
* a {@link ConnectionUrlParser} instance containing the parsed version of the original connection string
* @param info
* the connection arguments map
*/
public LoadBalanceDnsSrvConnectionUrl(ConnectionUrlParser connStrParser, Properties info) {
super(connStrParser, info);
this.type = Type.LOADBALANCE_DNS_SRV_CONNECTION;
/*
* Validate the hosts list:
* 1. One host (SRV service name) must be provided.
* 2. No more than one host (SRV service name) can be provided.
* 3. No port can be provided, i.e., port number must be equals to DEFAULT_PORT.
* 4. If property 'dnsSrv' is set then it cannot be "false".
* 5. Property 'protocol' cannot be "PIPE".
* 6. Property 'loadBalanceConnectionGroup' cannot be set.
*/
HostInfo srvHost = super.getMainHost();
Map hostProps = srvHost.getHostProperties();
if (DEFAULT_HOST.equals(srvHost.getHost())) {
throw ExceptionFactory.createException(InvalidConnectionAttributeException.class, Messages.getString("ConnectionString.18"));
}
if (this.hosts.size() != 1) {
throw ExceptionFactory.createException(InvalidConnectionAttributeException.class, Messages.getString("ConnectionString.19"));
}
if (srvHost.getPort() != DEFAULT_PORT) {
throw ExceptionFactory.createException(InvalidConnectionAttributeException.class, Messages.getString("ConnectionString.22"));
}
if (hostProps.containsKey(PropertyKey.dnsSrv.getKeyName())) {
if (!BooleanPropertyDefinition.booleanFrom(PropertyKey.dnsSrv.getKeyName(), hostProps.get(PropertyKey.dnsSrv.getKeyName()), null)) {
throw ExceptionFactory.createException(InvalidConnectionAttributeException.class,
Messages.getString("ConnectionString.23", new Object[] { PropertyKey.dnsSrv.getKeyName() }));
}
}
if (hostProps.containsKey(PropertyKey.PROTOCOL.getKeyName()) && hostProps.get(PropertyKey.PROTOCOL.getKeyName()).equalsIgnoreCase("PIPE")) {
throw ExceptionFactory.createException(InvalidConnectionAttributeException.class, Messages.getString("ConnectionString.24"));
}
if (hostProps.containsKey(PropertyKey.loadBalanceConnectionGroup.getKeyName())) {
throw ExceptionFactory.createException(InvalidConnectionAttributeException.class,
Messages.getString("ConnectionString.25", new Object[] { PropertyKey.loadBalanceConnectionGroup.getKeyName() }));
}
}
/**
* Injects additional properties into the connection arguments while the connection arguments map
* is being constructed.
*
* @param props
* the properties already containing all known connection arguments
*/
@Override
protected void injectPerTypeProperties(Map props) {
if (props.containsKey(PropertyKey.loadBalanceAutoCommitStatementThreshold.getKeyName())) {
try {
int autoCommitSwapThreshold = Integer.parseInt(props.get(PropertyKey.loadBalanceAutoCommitStatementThreshold.getKeyName()));
if (autoCommitSwapThreshold > 0) {
String queryInterceptors = props.get(PropertyKey.queryInterceptors.getKeyName());
String lbi = "com.mysql.cj.jdbc.ha.LoadBalancedAutoCommitInterceptor";
if (StringUtils.isNullOrEmpty(queryInterceptors)) {
props.put(PropertyKey.queryInterceptors.getKeyName(), lbi);
} else {
props.put(PropertyKey.queryInterceptors.getKeyName(), queryInterceptors + "," + lbi);
}
}
} catch (Throwable t) {
// Ignore, this will be handled later.
}
}
}
@Override
public String getDefaultHost() {
return DEFAULT_HOST;
}
@Override
public int getDefaultPort() {
return DEFAULT_PORT;
}
/**
* Returns a hosts list built from the result of the DNS SRV lookup for the original host name.
*
* @param view
* the type of the view to use in the returned list of hosts. This argument is ignored in this implementation.
*
* @return
* the hosts list from the result of the DNS SRV lookup, filtered for the given view.
*/
@Override
public List getHostsList(HostsListView view) {
return getHostsListFromDnsSrv(getMainHost());
}
}
