Java tutorial
/** * Licensed to JumpMind Inc under one or more contributor * license agreements. See the NOTICE file distributed * with this work for additional information regarding * copyright ownership. JumpMind Inc licenses this file * to you under the GNU General Public License, version 3.0 (GPLv3) * (the "License"); you may not use this file except in compliance * with the License. * * You should have received a copy of the GNU General Public License, * version 3.0 (GPLv3) along with this library; if not, see * <http://www.gnu.org/licenses/>. * * 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.jumpmind.symmetric.db.firebird; import java.util.List; import org.apache.commons.lang.StringUtils; import org.jumpmind.db.platform.IDatabasePlatform; import org.jumpmind.db.sql.ISqlTransaction; import org.jumpmind.db.sql.mapper.StringMapper; import org.jumpmind.db.util.BinaryEncoding; import org.jumpmind.symmetric.db.AbstractSymmetricDialect; import org.jumpmind.symmetric.db.ISymmetricDialect; import org.jumpmind.symmetric.model.Channel; import org.jumpmind.symmetric.model.Trigger; import org.jumpmind.symmetric.service.IParameterService; import org.springframework.jdbc.UncategorizedSQLException; /* * Database dialect for <a href="http://www.firebirdsql.org/">Firebird</a>. */ public class FirebirdSymmetricDialect extends AbstractSymmetricDialect implements ISymmetricDialect { static final String SQL_DROP_FUNCTION = "DROP EXTERNAL FUNCTION $(functionName)"; static final String SQL_FUNCTION_INSTALLED = "select count(*) from rdb$functions where rdb$function_name = upper('$(functionName)')"; static final String SYNC_TRIGGERS_DISABLED_USER_VARIABLE = "sync_triggers_disabled"; static final String SYNC_TRIGGERS_DISABLED_NODE_VARIABLE = "sync_node_disabled"; public FirebirdSymmetricDialect(IParameterService parameterService, IDatabasePlatform platform) { super(parameterService, platform); this.triggerTemplate = new FirebirdTriggerTemplate(this); } @Override public void createRequiredDatabaseObjects() { String escape = this.parameterService.getTablePrefix() + "_" + "escape"; if (!installed(SQL_FUNCTION_INSTALLED, escape)) { String sql = "declare external function $(functionName) cstring(32660) " + " returns cstring(32660) free_it entry_point 'sym_escape' module_name 'sym_udf' "; install(sql, escape); } String hex = this.parameterService.getTablePrefix() + "_" + "hex"; if (!installed(SQL_FUNCTION_INSTALLED, hex)) { String sql = "declare external function $(functionName) blob " + " returns cstring(32660) free_it entry_point 'sym_hex' module_name 'sym_udf' "; install(sql, hex); } try { platform.getSqlTemplate().queryForInt("select char_length(" + escape + "('')) from rdb$database"); } catch (UncategorizedSQLException e) { if (e.getSQLException().getErrorCode() == -804) { log.error("Please install the sym_udf.so/dll to your {firebird_home}/UDF folder"); } throw new RuntimeException("Function " + escape + " is not installed", e); } } @Override public void dropRequiredDatabaseObjects() { String escape = this.parameterService.getTablePrefix() + "_" + "escape"; if (installed(SQL_FUNCTION_INSTALLED, escape)) { uninstall(SQL_DROP_FUNCTION, escape); } String hex = this.parameterService.getTablePrefix() + "_" + "hex"; if (installed(SQL_FUNCTION_INSTALLED, hex)) { uninstall(SQL_DROP_FUNCTION, hex); } } @Override protected boolean doesTriggerExistOnPlatform(String catalogName, String schema, String tableName, String triggerName) { return platform.getSqlTemplate().queryForInt("select count(*) from rdb$triggers where rdb$trigger_name = ?", new Object[] { triggerName.toUpperCase() }) > 0; } public void disableSyncTriggers(ISqlTransaction transaction, String nodeId) { } public void enableSyncTriggers(ISqlTransaction transaction) { } public String getSyncTriggersExpression() { return "1=1"; } @Override public String getTransactionTriggerExpression(String defaultCatalog, String defaultSchema, Trigger trigger) { return "current_transaction||''"; } @Override public boolean isBlobSyncSupported() { return true; } @Override public BinaryEncoding getBinaryEncoding() { return BinaryEncoding.HEX; } public void cleanDatabase() { } @Override public String getName() { return StringUtils.left(super.getName(), 50); } @Override public boolean supportsOpenCursorsAcrossCommit() { return false; } @Override public boolean supportsTransactionId() { return true; } @Override public void truncateTable(String tableName) { platform.getSqlTemplate().update("delete from " + tableName); } @Override public void cleanupTriggers() { List<String> names = platform.getSqlTemplate() .query("select rdb$trigger_name from rdb$triggers where rdb$trigger_name like '" + parameterService.getTablePrefix().toUpperCase() + "_%'", new StringMapper()); int count = 0; for (String name : names) { count += platform.getSqlTemplate().update("drop trigger " + name); } if (count > 0) { log.info("Remove {} triggers", count); } } @Override public String massageDataExtractionSql(String sql, Channel channel) { if (channel != null && !channel.isContainsBigLob()) { sql = StringUtils.replace(sql, "d.row_data", "cast(d.row_data as varchar(10000))"); sql = StringUtils.replace(sql, "d.old_data", "cast(d.old_data as varchar(10000))"); sql = StringUtils.replace(sql, "d.pk_data", "cast(d.pk_data as varchar(500))"); } return sql; } }