/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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package org.jbpm.pvm.internal.cmd;
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import org.hibernate.Session;
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import org.jbpm.api.JbpmException;
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import org.jbpm.api.cmd.Command;
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import org.jbpm.api.cmd.Environment;
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import org.jbpm.internal.log.Log;
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import org.jbpm.pvm.internal.env.EnvironmentImpl;
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import org.jbpm.pvm.internal.id.PropertyImpl;
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import org.jbpm.pvm.internal.model.ExecutionImpl;
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import org.jbpm.pvm.internal.processengine.ProcessEngineImpl;
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/**
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* @author Tom Baeyens
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*/
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public class CheckDbCmd implements Command<Object> {
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private static final long serialVersionUID = 1L;
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private static Log log = Log.getLog(CheckDbCmd.class.getName());
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public Object execute(Environment environment) throws Exception {
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Session session = EnvironmentImpl.getFromCurrent(Session.class);
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// if table JBPM4_PROPERTIES doesn't exist,
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if (!PropertyImpl.propertiesTableExists(session)) {
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if (!executionTableExists(session)) {
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// tell users to run create.schema
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throw new JbpmException("no jBPM DB schema: no JBPM4_EXECUTION table. Run the create.jbpm.schema target first in the install tool.");
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} else {
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// tell users to run upgrade
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throw new JbpmException("jBPM DB schema not in sync with library version: no JBPM4_PROPERTIES table. Run the upgrade target first in the install tool.");
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}
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} else {
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Long nextDbid = PropertyImpl.getNextDbid(session);
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// if there is no next.dbid property specified
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if (nextDbid==null) {
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// (this only happens in the test suite)
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// initialize the dbid property.
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PropertyImpl.setNextDbid(session, 1);
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}
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}
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// verify if DB version matches with library version,
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String dbVersion = PropertyImpl.getDbVersion(session);
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log.info("jBPM version info: library["+ProcessEngineImpl.JBPM_LIBRARY_VERSION+"], schema["+dbVersion+"]");
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if ( (dbVersion!=null)
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&& (!dbVersion.equals(ProcessEngineImpl.JBPM_LIBRARY_VERSION))
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) {
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// tell users to run upgrade
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throw new JbpmException("jBPM DB schema version ("+dbVersion+") differs from jBPM library version ("+ProcessEngineImpl.JBPM_LIBRARY_VERSION+"): run the upgrade tool first.");
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}
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return null;
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}
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public static boolean executionTableExists(Session session) {
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try {
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session.createQuery("from "+ExecutionImpl.class.getName())
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.setMaxResults(1)
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.uniqueResult();
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return true;
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} catch (Exception e) {
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return false;
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}
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}
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}
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