/**
* 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.hsqldb;
import org.jumpmind.db.model.Table;
import org.jumpmind.db.platform.IDatabasePlatform;
import org.jumpmind.db.sql.ISqlTransaction;
import org.jumpmind.db.util.BinaryEncoding;
import org.jumpmind.symmetric.common.ParameterConstants;
import org.jumpmind.symmetric.db.AbstractEmbeddedSymmetricDialect;
import org.jumpmind.symmetric.db.ISymmetricDialect;
import org.jumpmind.symmetric.model.Trigger;
import org.jumpmind.symmetric.service.IParameterService;
public class HsqlDbSymmetricDialect extends AbstractEmbeddedSymmetricDialect implements ISymmetricDialect {
static final String SQL_DROP_FUNCTION = "DROP ALIAS $(functionName)";
static final String SQL_FUNCTION_INSTALLED = "select count(*) from INFORMATION_SCHEMA.SYSTEM_ALIASES where ALIAS='$(functionName)'" ;
static final String DUAL_TABLE = "DUAL";
private boolean enforceStrictSize = true;
public HsqlDbSymmetricDialect(IParameterService parameterService, IDatabasePlatform platform) {
super(parameterService, platform);
this.triggerTemplate = new HsqlDbTriggerTemplate(this);
platform.getSqlTemplate().update("SET WRITE_DELAY 100 MILLIS");
platform.getSqlTemplate().update("SET PROPERTY \"hsqldb.default_table_type\" 'cached'");
platform.getSqlTemplate().update("SET PROPERTY \"sql.enforce_strict_size\" " + enforceStrictSize);
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
HsqlDbSymmetricDialect.this.platform.getSqlTemplate().update("SHUTDOWN");
}
});
createDummyDualTable();
}
@Override
protected boolean doesTriggerExistOnPlatform(String catalogName, String schemaName, String tableName,
String triggerName) {
boolean exists = (platform.getSqlTemplate().queryForInt(
"select count(*) from INFORMATION_SCHEMA.SYSTEM_TRIGGERS WHERE TRIGGER_NAME = ?",
new Object[] { triggerName }) > 0)
|| (platform.getSqlTemplate().queryForInt(
"select count(*) from INFORMATION_SCHEMA.SYSTEM_TABLES WHERE TABLE_NAME = ?",
new Object[] { String.format("%s_CONFIG", triggerName) }) > 0);
return exists;
}
@Override
public void createRequiredDatabaseObjects() {
String encode = this.parameterService.getTablePrefix() + "_" + "base_64_encode";
if (!installed(SQL_FUNCTION_INSTALLED, encode)) {
String sql = "CREATE ALIAS $(functionName) for \"org.jumpmind.symmetric.db.hsqldb.HsqlDbFunctions.encodeBase64\"; ";
install(sql, encode);
}
String setSession = this.parameterService.getTablePrefix() + "_" + "set_session";
if (!installed(SQL_FUNCTION_INSTALLED, setSession)) {
String sql = "CREATE ALIAS $(functionName) for \"org.jumpmind.symmetric.db.hsqldb.HsqlDbFunctions.setSession\"; ";
install(sql, setSession);
}
String getSession = this.parameterService.getTablePrefix() + "_" + "get_session";
if (!installed(SQL_FUNCTION_INSTALLED, getSession)) {
String sql = "CREATE ALIAS $(functionName) for \"org.jumpmind.symmetric.db.hsqldb.HsqlDbFunctions.getSession\"; ";
install(sql, getSession);
}
}
@Override
public void dropRequiredDatabaseObjects() {
String encode = this.parameterService.getTablePrefix() + "_" + "base_64_encode";
if (installed(SQL_FUNCTION_INSTALLED, encode)) {
uninstall(SQL_DROP_FUNCTION, encode);
}
String setSession = this.parameterService.getTablePrefix() + "_" + "set_session";
if (installed(SQL_FUNCTION_INSTALLED, setSession)) {
uninstall(SQL_DROP_FUNCTION, setSession);
}
String getSession = this.parameterService.getTablePrefix() + "_" + "get_session";
if (installed(SQL_FUNCTION_INSTALLED, getSession)) {
uninstall(SQL_DROP_FUNCTION, getSession);
}
}
/*
* This is for use in the java triggers so we can create a virtual table w/
* old and new columns values to bump SQL expressions up against.
*/
private void createDummyDualTable() {
Table table = platform.getTableFromCache(null, null, DUAL_TABLE, true);
if (table == null) {
platform.getSqlTemplate().update("CREATE MEMORY TABLE " + DUAL_TABLE + "(DUMMY VARCHAR(1))");
platform.getSqlTemplate().update("INSERT INTO " + DUAL_TABLE + " VALUES(NULL)");
platform.getSqlTemplate().update("SET TABLE " + DUAL_TABLE + " READONLY TRUE");
}
}
@Override
public void removeTrigger(StringBuilder sqlBuffer, String catalogName, String schemaName, String triggerName,
String tableName) {
final String dropSql = String.format("DROP TRIGGER %s", triggerName);
logSql(dropSql, sqlBuffer);
final String dropTable = String.format("DROP TABLE IF EXISTS %s_CONFIG", triggerName);
logSql(dropTable, sqlBuffer);
if (parameterService.is(ParameterConstants.AUTO_SYNC_TRIGGERS)) {
try {
int count = platform.getSqlTemplate().update(dropSql);
if (count > 0) {
log.info("Just dropped trigger {}", triggerName);
}
} catch (Exception e) {
log.warn("Error removing {}: {}", triggerName, e.getMessage());
}
try {
int count = platform.getSqlTemplate().update(dropTable);
if (count > 0) {
log.info("Just dropped table {}_CONFIG", triggerName);
}
} catch (Exception e) {
log.warn("Error removing {}: {}", triggerName, e.getMessage());
}
}
}
@Override
public boolean isBlobSyncSupported() {
return true;
}
@Override
public boolean isClobSyncSupported() {
return true;
}
public void disableSyncTriggers(ISqlTransaction transaction, String nodeId) {
transaction.prepareAndExecute("CALL " + parameterService.getTablePrefix() + "_set_session('sync_prevented','1')");
transaction.prepareAndExecute("CALL " + parameterService.getTablePrefix() + "_set_session('node_value','"+nodeId+"')");
}
public void enableSyncTriggers(ISqlTransaction transaction) {
transaction.prepareAndExecute("CALL " + parameterService.getTablePrefix() + "_set_session('sync_prevented',null)");
transaction.prepareAndExecute("CALL " + parameterService.getTablePrefix() + "_set_session('node_value',null)");
}
public String getSyncTriggersExpression() {
return " " + parameterService.getTablePrefix() + "_get_session(''sync_prevented'') is null ";
}
/*
* An expression which the java trigger can string replace
*/
@Override
public String getTransactionTriggerExpression(String defaultCatalog, String defaultSchema, Trigger trigger) {
// TODO Get I use a temporary table and a randomly generated GUID?
return "null";
}
@Override
public BinaryEncoding getBinaryEncoding() {
return BinaryEncoding.BASE64;
}
public boolean isNonBlankCharColumnSpacePadded() {
return enforceStrictSize;
}
public boolean isCharColumnSpaceTrimmed() {
return false;
}
public boolean isEmptyStringNulled() {
return false;
}
@Override
public boolean supportsTransactionId() {
return false;
}
@Override
public void truncateTable(String tableName) {
platform.getSqlTemplate().update("delete from " + tableName);
}
@Override
public boolean canGapsOccurInCapturedDataIds() {
return false;
}
}