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/*****************************************************************************
* Copyright (C) 2008 EnterpriseDB Corporation.
* Copyright (C) 2011 Stado Global Development Group.
*
* This file is part of Stado.
*
* Stado 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, either version 3 of the License, or
* (at your option) any later version.
*
* Stado 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 Stado. If not, see <http://www.gnu.org/licenses/>.
*
* You can find Stado at http://www.stado.us
*
****************************************************************************/
/**
*
*/
package org.postgresql.stado.parser;
import java.util.HashMap;
import java.util.Map;
import org.postgresql.stado.common.util.XLogger;
import org.postgresql.stado.engine.Engine;
import org.postgresql.stado.engine.ExecutionResult;
import org.postgresql.stado.engine.IPreparable;
import org.postgresql.stado.engine.XDBSessionContext;
import org.postgresql.stado.exception.XDBSecurityException;
import org.postgresql.stado.exception.XDBServerException;
import org.postgresql.stado.metadata.DBNode;
import org.postgresql.stado.metadata.MetaData;
import org.postgresql.stado.metadata.SyncAlterTableSetTablespace;
import org.postgresql.stado.metadata.SysLogin;
import org.postgresql.stado.metadata.SysTablespace;
import org.postgresql.stado.parser.core.syntaxtree.SetTablespace;
import org.postgresql.stado.parser.core.visitor.DepthFirstVoidArguVisitor;
import org.postgresql.stado.parser.handler.IdentifierHandler;
/**
*
*
*/
public class SqlAlterSetTablespace extends DepthFirstVoidArguVisitor implements
IPreparable {
private static final XLogger logger = XLogger
.getLogger(SqlAlterSetTablespace.class);
private XDBSessionContext client;
private SqlAlterTable parent;
private String tablespaceName = null;
private SysTablespace tablespace = null;
private Map<DBNode,String> commands = null;
/**
*
*/
public SqlAlterSetTablespace(SqlAlterTable parent, XDBSessionContext client) {
this.client = client;
this.parent = parent;
}
/**
* Grammar production:
* f0 -> <SET_>
* f1 -> <TABLESPACE_>
* f2 -> Identifier(prn)
*/
@Override
public void visit(SetTablespace n, Object argu) {
tablespaceName = (String) n.f2.accept(new IdentifierHandler(), argu);
}
public SqlAlterTable getParent() {
return parent;
}
public SysTablespace getTablespace() {
return tablespace;
}
/*
* (non-Javadoc)
*
* @see org.postgresql.stado.Engine.IPreparable#isPrepared()
*/
public boolean isPrepared() {
return tablespace != null;
}
/*
* (non-Javadoc)
*
* @see org.postgresql.stado.Engine.IPreparable#prepare()
*/
public void prepare() throws Exception {
final String method = "prepare";
logger.entering(method, new Object[] {});
try {
if (!isPrepared()) {
if (client.getCurrentUser().getUserClass() != SysLogin.USER_CLASS_DBA) {
XDBSecurityException ex = new XDBSecurityException("Only "
+ SysLogin.USER_CLASS_DBA_STR
+ " can change table workspace");
logger.throwing(ex);
throw ex;
}
SysTablespace newTablespace = MetaData.getMetaData()
.getTablespace(tablespaceName);
commands = new HashMap<DBNode,String>();
for (DBNode dbNode : parent.getTable().getNodeList()) {
if (!newTablespace.getLocations().containsKey(dbNode.getNodeId())) {
throw new XDBServerException("Tablespace "
+ IdentifierHandler.quote(tablespaceName)
+ " does not exist on Node "
+ dbNode.getNodeId());
}
String command = "ALTER TABLE "
+ IdentifierHandler.quote(parent.getTableName())
+ " SET TABLESPACE "
+ IdentifierHandler.quote(tablespaceName + "_" + dbNode.getNodeId());
commands.put(dbNode, command);
}
tablespace = newTablespace;
}
} finally {
logger.exiting(method);
}
}
/*
* (non-Javadoc)
*
* @see org.postgresql.stado.Engine.IExecutable#execute(org.postgresql.stado.Engine.Engine)
*/
public ExecutionResult execute(Engine engine) throws Exception {
final String method = "execute";
logger.entering(method, new Object[] {});
try {
engine.executeDDLOnMultipleNodes(commands,
new SyncAlterTableSetTablespace(this), client);
return null;
} finally {
logger.exiting(method);
}
}
}
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