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OracleDbDialect.java
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/
OracleDbDialect.java
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/*
* SymmetricDS is an open source database synchronization solution.
*
* Copyright (C) Chris Henson <chenson42@users.sourceforge.net>
*
* 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 3 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, see
* <http://www.gnu.org/licenses/>.
*/
package org.jumpmind.symmetric.db.oracle;
import java.sql.Types;
import java.text.ParseException;
import java.util.Date;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.time.DateUtils;
import org.jumpmind.symmetric.common.ParameterConstants;
import org.jumpmind.symmetric.db.AbstractDbDialect;
import org.jumpmind.symmetric.db.BinaryEncoding;
import org.jumpmind.symmetric.db.IDbDialect;
import org.jumpmind.symmetric.db.SequenceIdentifier;
import org.jumpmind.symmetric.ddl.Platform;
import org.jumpmind.symmetric.ddl.model.Table;
import org.jumpmind.symmetric.model.DataEventType;
import org.jumpmind.symmetric.model.Trigger;
import org.jumpmind.symmetric.model.TriggerHistory;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.BadSqlGrammarException;
import org.springframework.jdbc.support.lob.OracleLobHandler;
import org.springframework.jdbc.support.nativejdbc.NativeJdbcExtractor;
public class OracleDbDialect extends AbstractDbDialect implements IDbDialect {
static final String ORACLE_OBJECT_TYPE = "FUNCTION";
String selectTriggerSql;
String selectTransactionsSql;
@Override
public void init(Platform pf, int queryTimeout) {
super.init(pf, queryTimeout);
try {
areDatabaseTransactionsPendingSince(System.currentTimeMillis());
supportsTransactionViews = true;
} catch (Exception ex) {
if (parameterService.is(ParameterConstants.DBDIALECT_ORACLE_USE_TRANSACTION_VIEW)) {
log.warn(ex);
}
}
}
@SuppressWarnings("unchecked")
protected void initLobHandler() {
lobHandler = new OracleLobHandler();
try {
Class clazz = Class.forName(parameterService
.getString(ParameterConstants.DB_NATIVE_EXTRACTOR));
NativeJdbcExtractor nativeJdbcExtractor = (NativeJdbcExtractor) clazz.newInstance();
((OracleLobHandler) lobHandler).setNativeJdbcExtractor(nativeJdbcExtractor);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
@SuppressWarnings("unchecked")
@Override
protected Integer overrideJdbcTypeForColumn(Map values) {
String typeName = (String) values.get("TYPE_NAME");
// This is for Oracle's TIMESTAMP(9)
if (typeName != null && typeName.startsWith("TIMESTAMP")) {
return Types.TIMESTAMP;
// This is for Oracle's NVARCHAR type
} else if (typeName != null && typeName.startsWith("NVARCHAR")) {
return Types.VARCHAR;
} else if (typeName != null && typeName.startsWith("NCHAR")) {
return Types.CHAR;
} else if (typeName != null && typeName.startsWith("BINARY_FLOAT")) {
return Types.FLOAT;
} else if (typeName != null && typeName.startsWith("BINARY_DOUBLE")) {
return Types.DOUBLE;
} else {
return super.overrideJdbcTypeForColumn(values);
}
}
@Override
public void createTrigger(StringBuilder sqlBuffer, DataEventType dml, Trigger trigger,
TriggerHistory hist, String tablePrefix, Table table) {
try {
super.createTrigger(sqlBuffer, dml, trigger, hist, tablePrefix, table);
} catch (BadSqlGrammarException ex) {
if (ex.getSQLException().getErrorCode() == 4095) {
try {
// a trigger of the same name must already exist on a table
log.warn("TriggerAlreadyExists", jdbcTemplate.queryForMap(
"select * " + selectTriggerSql,
new Object[] { hist.getTriggerNameForDmlType(dml), hist.getSourceTableName() }));
} catch (DataAccessException e) {
}
}
throw ex;
}
}
@Override
public BinaryEncoding getBinaryEncoding() {
return BinaryEncoding.BASE64;
}
public boolean isNonBlankCharColumnSpacePadded() {
return true;
}
public boolean isCharColumnSpaceTrimmed() {
return false;
}
public boolean isEmptyStringNulled() {
return true;
}
@Override
public boolean isDateOverrideToTimestamp() {
return true;
}
@Override
public String getTransactionTriggerExpression(String defaultCatalog, String defaultSchema,
Trigger trigger) {
return tablePrefix + "_" + "transaction_id()";
}
@Override
public boolean supportsTransactionId() {
return true;
}
@Override
protected String getSequenceName(SequenceIdentifier identifier) {
switch (identifier) {
case OUTGOING_BATCH:
return "SEQ_SYM_OUTGOIN_BATCH_BATCH_ID";
case DATA:
return "SEQ_SYM_DATA_DATA_ID";
case TRIGGER_HIST:
return "SEQ_SYM_TRIGGER_RIGGER_HIST_ID";
}
return null;
}
@Override
public String getSelectLastInsertIdSql(String sequenceName) {
return "select " + sequenceName + ".currval from dual";
}
@Override
protected boolean doesTriggerExistOnPlatform(String catalog, String schema, String tableName,
String triggerName) {
return jdbcTemplate
.queryForInt(
"select count(*) " + selectTriggerSql,
new Object[] { triggerName, tableName }) > 0;
}
@Override
public boolean storesUpperCaseNamesInCatalog() {
return true;
}
public void purge() {
jdbcTemplate.update("purge recyclebin");
}
protected String getSymmetricPackageName() {
return tablePrefix + "_pkg";
}
public void disableSyncTriggers(String nodeId) {
jdbcTemplate.update(String.format("call %s.setValue(1)", getSymmetricPackageName()));
if (nodeId != null) {
jdbcTemplate.update(String.format("call %s.setNodeValue('" + nodeId + "')",
getSymmetricPackageName()));
}
}
public void enableSyncTriggers() {
jdbcTemplate.update(String.format("call %s.setValue(null)", getSymmetricPackageName()));
jdbcTemplate.update(String.format("call %s.setNodeValue(null)", getSymmetricPackageName()));
}
public String getSyncTriggersExpression() {
return tablePrefix + "_trigger_disabled() is null";
}
public String getDefaultCatalog() {
return null;
}
@Override
public String getDefaultSchema() {
if (StringUtils.isBlank(this.defaultSchema)) {
this.defaultSchema = (String) jdbcTemplate.queryForObject(
"SELECT sys_context('USERENV', 'CURRENT_SCHEMA') FROM dual", String.class);
}
return defaultSchema;
}
@Override
protected void initTablesAndFunctionsForSpecificDialect() {
}
@Override
public boolean areDatabaseTransactionsPendingSince(long time) {
String returnValue = jdbcTemplate.queryForObject(selectTransactionsSql, String.class);
if (returnValue != null) {
Date date;
try {
date = DateUtils.parseDate(returnValue, new String[] { "MM/dd/yy HH:mm:ss" });
return date.getTime() < time;
} catch (ParseException e) {
log.error(e);
return true;
}
} else {
return false;
}
}
public void setSelectTransactionsSql(String selectTransactionSql) {
this.selectTransactionsSql = selectTransactionSql;
}
public void setSelectTriggerSql(String selectTriggerSql) {
this.selectTriggerSql = selectTriggerSql;
}
@Override
public boolean supportsTransactionViews() {
return supportsTransactionViews && parameterService.is(ParameterConstants.DBDIALECT_ORACLE_USE_TRANSACTION_VIEW);
}
}