org.camunda.bpm.engine.test.standalone.db.MetaDataTest.java Source code

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Here is the source code for org.camunda.bpm.engine.test.standalone.db.MetaDataTest.java

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/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.camunda.bpm.engine.test.standalone.db;

import java.sql.ResultSet;
import java.sql.ResultSetMetaData;

import org.apache.ibatis.session.SqlSession;
import org.camunda.bpm.engine.impl.ProcessEngineImpl;
import org.camunda.bpm.engine.impl.ProcessEngineLogger;
import org.camunda.bpm.engine.impl.db.sql.DbSqlSession;
import org.camunda.bpm.engine.impl.interceptor.Command;
import org.camunda.bpm.engine.impl.interceptor.CommandContext;
import org.camunda.bpm.engine.impl.test.PluggableProcessEngineTestCase;
import org.slf4j.Logger;

/**
 * @author Tom Baeyens
 */
public class MetaDataTest extends PluggableProcessEngineTestCase {

    private static Logger LOG = ProcessEngineLogger.TEST_LOGGER.getLogger();

    public void testMetaData() {
        ((ProcessEngineImpl) processEngine).getProcessEngineConfiguration().getCommandExecutorTxRequired()
                .execute(new Command<Object>() {
                    public Object execute(CommandContext commandContext) {
                        // PRINT THE TABLE NAMES TO CHECK IF WE CAN USE METADATA INSTEAD
                        // THIS IS INTENDED FOR TEST THAT SHOULD RUN ON OUR QA INFRASTRUCTURE TO SEE IF METADATA
                        // CAN BE USED INSTEAD OF PERFORMING A QUERY THAT MIGHT FAIL
                        try {
                            SqlSession sqlSession = commandContext.getSession(DbSqlSession.class).getSqlSession();
                            ResultSet tables = sqlSession.getConnection().getMetaData().getTables(null, null, null,
                                    null);
                            while (tables.next()) {
                                ResultSetMetaData resultSetMetaData = tables.getMetaData();
                                int columnCount = resultSetMetaData.getColumnCount();
                                for (int i = 1; i <= columnCount; i++) {
                                    LOG.info("result set column " + i + " | " + resultSetMetaData.getColumnName(i)
                                            + " | " + resultSetMetaData.getColumnLabel(i) + " | "
                                            + tables.getString(i));
                                }
                                LOG.info("-------------------------------------------------------");
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                        return null;
                    }
                });
    }
}