/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.function;
import org.teiid.designer.annotation.Since;
import org.teiid.designer.runtime.version.spi.TeiidServerVersion.Version;
import org.teiid.metadata.FunctionMethod.Determinism;
import org.teiid.query.function.metadata.FunctionCategoryConstants;
import org.teiid.query.util.CommandContext;
import org.teiid.runtime.client.Messages;
import org.teiid.runtime.client.TeiidClientException;
@Since(Version.TEIID_8_0)
public class SystemFunctionMethods {
private static final int MAX_VARIABLES = 512;
@TeiidFunction(category=FunctionCategoryConstants.SYSTEM, nullOnNull=true, determinism=Determinism.COMMAND_DETERMINISTIC)
public static Object teiid_session_get(CommandContext context, String key) {
return context.getSessionVariable(key);
}
@TeiidFunction(category=FunctionCategoryConstants.SYSTEM, determinism=Determinism.COMMAND_DETERMINISTIC)
public static Object teiid_session_set(CommandContext context, String key, Object value) throws Exception {
Object oldValue = context.getSessionVariable(key);
if (context.getSessionVariableCount() > MAX_VARIABLES && oldValue == null) {
throw new TeiidClientException(Messages.gs(Messages.TEIID.TEIID31136, MAX_VARIABLES));
}
return context.setSessionVariable(key, value);
}
}