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JdbcTemplateStorageAccessor.java
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JdbcTemplateStorageAccessor.java
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/**
* Copyright 2009 the original author or authors.
*
* 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 net.javacrumbs.shedlock.provider.jdbctemplate;
import net.javacrumbs.shedlock.core.LockConfiguration;
import net.javacrumbs.shedlock.provider.jdbctemplate.JdbcTemplateLockProvider.Configuration;
import net.javacrumbs.shedlock.support.AbstractStorageAccessor;
import net.javacrumbs.shedlock.support.annotation.NonNull;
import org.springframework.dao.ConcurrencyFailureException;
import org.springframework.dao.DataIntegrityViolationException;
import org.springframework.jdbc.BadSqlGrammarException;
import org.springframework.jdbc.UncategorizedSQLException;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionException;
import org.springframework.transaction.TransactionSystemException;
import org.springframework.transaction.support.TransactionTemplate;
import java.util.Map;
import static java.util.Objects.requireNonNull;
/**
* Spring JdbcTemplate based implementation usable in JTA environment
*/
class JdbcTemplateStorageAccessor extends AbstractStorageAccessor {
private final NamedParameterJdbcTemplate jdbcTemplate;
private final TransactionTemplate transactionTemplate;
private final Configuration configuration;
private SqlStatementsSource sqlStatementsSource;
JdbcTemplateStorageAccessor(@NonNull Configuration configuration) {
requireNonNull(configuration, "configuration can not be null");
this.jdbcTemplate = new NamedParameterJdbcTemplate(configuration.getJdbcTemplate());
this.configuration = configuration;
PlatformTransactionManager transactionManager = configuration.getTransactionManager() != null ?
configuration.getTransactionManager() :
new DataSourceTransactionManager(configuration.getJdbcTemplate().getDataSource());
this.transactionTemplate = new TransactionTemplate(transactionManager);
this.transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRES_NEW);
if (configuration.getIsolationLevel() != null) {
this.transactionTemplate.setIsolationLevel(configuration.getIsolationLevel());
}
}
@Override
public boolean insertRecord(@NonNull LockConfiguration lockConfiguration) {
try {
String sql = sqlStatementsSource().getInsertStatement();
return execute(sql, lockConfiguration);
} catch (DataIntegrityViolationException | ConcurrencyFailureException | TransactionSystemException e) {
logger.debug("Duplicate key", e);
return false;
} catch (BadSqlGrammarException | UncategorizedSQLException e) {
logger.error("Unexpected exception", e);
return false;
}
}
@Override
public boolean updateRecord(@NonNull LockConfiguration lockConfiguration) {
String sql = sqlStatementsSource().getUpdateStatement();
try {
return execute(sql, lockConfiguration);
} catch (ConcurrencyFailureException e) {
logger.debug("Serialization exception", e);
return false;
} catch (DataIntegrityViolationException | TransactionSystemException e) {
logger.error("Unexpected exception", e);
return false;
}
}
@Override
public boolean extend(@NonNull LockConfiguration lockConfiguration) {
String sql = sqlStatementsSource().getExtendStatement();
logger.debug("Extending lock={} until={}", lockConfiguration.getName(), lockConfiguration.getLockAtMostUntil());
return execute(sql, lockConfiguration);
}
@Override
public void unlock(@NonNull LockConfiguration lockConfiguration) {
try {
doUnlock(lockConfiguration);
} catch (ConcurrencyFailureException | TransactionSystemException e) {
logger.info("Unlock failed due to TransactionSystemException - retrying");
doUnlock(lockConfiguration);
}
}
private void doUnlock(LockConfiguration lockConfiguration) {
String sql = sqlStatementsSource().getUnlockStatement();
execute(sql, lockConfiguration);
}
@SuppressWarnings("ConstantConditions")
private boolean execute(String sql, LockConfiguration lockConfiguration) throws TransactionException {
return transactionTemplate.execute(status -> jdbcTemplate.update(sql, params(lockConfiguration)) > 0);
}
@NonNull
private Map<String, Object> params(@NonNull LockConfiguration lockConfiguration) {
return sqlStatementsSource().params(lockConfiguration);
}
private SqlStatementsSource sqlStatementsSource() {
synchronized (configuration) {
if (sqlStatementsSource == null) {
sqlStatementsSource = SqlStatementsSource.create(configuration);
}
return sqlStatementsSource;
}
}
}