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/**
* 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
* .
*
* 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.h2;
import java.util.List;
import org.apache.commons.lang.StringUtils;
import org.jumpmind.db.model.Table;
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.common.ParameterConstants;
import org.jumpmind.symmetric.db.AbstractEmbeddedSymmetricDialect;
import org.jumpmind.symmetric.db.ISymmetricDialect;
import org.jumpmind.symmetric.model.Trigger;
import org.jumpmind.symmetric.model.TriggerHistory;
import org.jumpmind.symmetric.service.IParameterService;
/*
* Synchronization support for the H2 database platform.
*/
public class H2SymmetricDialect extends AbstractEmbeddedSymmetricDialect implements ISymmetricDialect {
static final String SQL_DROP_FUNCTION = "DROP ALIAS $(functionName)";
static final String SQL_FUNCTION_INSTALLED = "select count(*) from INFORMATION_SCHEMA.FUNCTION_ALIASES where ALIAS_NAME='$(functionName)'" ;
public H2SymmetricDialect(IParameterService parameterService, IDatabasePlatform platform) {
super(parameterService, platform);
this.triggerTemplate = new H2TriggerTemplate(this);
}
@Override
protected boolean doesTriggerExistOnPlatform(String catalogName, String schemaName, String tableName,
String triggerName) {
boolean exists = (platform.getSqlTemplate()
.queryForInt("select count(*) from INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME = ?",
new Object[] { triggerName }) > 0)
&& (platform.getSqlTemplate().queryForInt("select count(*) from INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = ?",
new Object[] { String.format("%s_CONFIG", triggerName) }) > 0);
if (!exists && !StringUtils.isBlank(triggerName)) {
removeTrigger(new StringBuilder(), catalogName, schemaName, triggerName, tableName, null);
}
return exists;
}
@Override
public void removeTrigger(StringBuilder sqlBuffer, String catalogName, String schemaName, String triggerName,
String tableName, TriggerHistory oldHistory) {
String prefix = Table.getQualifiedTablePrefix(catalogName, schemaName, getPlatform().getDatabaseInfo().getDelimiterToken());
final String dropSql = String.format("DROP TRIGGER IF EXISTS %s%s", prefix, triggerName);
logSql(dropSql, sqlBuffer);
final String dropTable = String.format("DROP TABLE IF EXISTS %s%s_CONFIG", prefix, triggerName);
logSql(dropTable, sqlBuffer);
if (parameterService.is(ParameterConstants.AUTO_SYNC_TRIGGERS)) {
try {
log.debug(
"Dropping trigger {} for {}",
triggerName,
oldHistory != null ? oldHistory
.getFullyQualifiedSourceTableName() : Table
.getFullyQualifiedTableName(catalogName,
schemaName, tableName));
platform.getSqlTemplate().update(dropSql);
platform.getSqlTemplate().update(dropTable);
} catch (Exception e) {
log.warn("Error removing {}: {}", triggerName, e.getMessage());
}
}
}
@Override
public void createRequiredDatabaseObjects() {
String encode = this.parameterService.getTablePrefix().toUpperCase() + "_" + "BASE64_ENCODE";
if (!installed(SQL_FUNCTION_INSTALLED, encode)) {
String sql = "CREATE ALIAS IF NOT EXISTS $(functionName) for \"org.jumpmind.symmetric.db.EmbeddedDbFunctions.encodeBase64\"; ";
install(sql, encode);
}
}
@Override
public void dropRequiredDatabaseObjects() {
String encode = this.parameterService.getTablePrefix().toUpperCase() + "_" + "BASE64_ENCODE";
if (installed(SQL_FUNCTION_INSTALLED, encode)) {
uninstall(SQL_DROP_FUNCTION, encode);
}
}
@Override
public boolean isBlobSyncSupported() {
return true;
}
@Override
public boolean isClobSyncSupported() {
return true;
}
public void disableSyncTriggers(ISqlTransaction transaction, String nodeId) {
transaction.prepareAndExecute("set @sync_prevented=1");
transaction.prepareAndExecute("set @node_value=?", nodeId);
}
public void enableSyncTriggers(ISqlTransaction transaction) {
transaction.prepareAndExecute("set @sync_prevented=null");
transaction.prepareAndExecute("set @node_value=null");
}
public String getSyncTriggersExpression() {
return " @sync_prevented is null ";
}
/*
* An expression which the java trigger can string replace
*/
@Override
public String getTransactionTriggerExpression(String defaultCatalog, String defaultSchema, Trigger trigger) {
return "TRANSACTION_ID()";
}
@Override
public BinaryEncoding getBinaryEncoding() {
return BinaryEncoding.BASE64;
}
@Override
public boolean supportsTransactionId() {
return true;
}
@Override
public void cleanupTriggers() {
List names = platform.getSqlTemplate().query("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = SCHEMA() AND TABLE_NAME LIKE '"+parameterService.getTablePrefix().toUpperCase()+"_%_CONFIG'", new StringMapper());
for (String name : names) {
platform.getSqlTemplate().update("drop table " + name);
log.info("Dropped table {}", name);
}
}
}
