/*
* Copyright 2002-2010 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 org.springframework.orm.ibatis;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.util.Properties;
import javax.sql.DataSource;
import com.ibatis.common.xml.NodeletException;
import com.ibatis.sqlmap.client.SqlMapClient;
import com.ibatis.sqlmap.client.SqlMapClientBuilder;
import com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser;
import com.ibatis.sqlmap.engine.builder.xml.SqlMapParser;
import com.ibatis.sqlmap.engine.builder.xml.XmlParserState;
import com.ibatis.sqlmap.engine.impl.ExtendedSqlMapClient;
import com.ibatis.sqlmap.engine.transaction.TransactionConfig;
import com.ibatis.sqlmap.engine.transaction.TransactionManager;
import com.ibatis.sqlmap.engine.transaction.external.ExternalTransactionConfig;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.NestedIOException;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy;
import org.springframework.jdbc.support.lob.LobHandler;
import org.springframework.util.ObjectUtils;
/**
* {@link org.springframework.beans.factory.FactoryBean} that creates an
* iBATIS {@link com.ibatis.sqlmap.client.SqlMapClient}. This is the usual
* way to set up a shared iBATIS SqlMapClient in a Spring application context;
* the SqlMapClient can then be passed to iBATIS-based DAOs via dependency
* injection.
*
* <p>Either {@link org.springframework.jdbc.datasource.DataSourceTransactionManager}
* or {@link org.springframework.transaction.jta.JtaTransactionManager} can be
* used for transaction demarcation in combination with a SqlMapClient,
* with JTA only necessary for transactions which span multiple databases.
*
* <p>Allows for specifying a DataSource at the SqlMapClient level. This
* is preferable to per-DAO DataSource references, as it allows for lazy
* loading and avoids repeated DataSource references in every DAO.
*
* <p><b>Note:</b> As of Spring 2.5.5, this class (finally) requires iBATIS 2.3
* or higher. The new "mappingLocations" feature requires iBATIS 2.3.2.
*
* @author Juergen Hoeller
* @since 24.02.2004
* @see #setConfigLocation
* @see #setDataSource
* @see SqlMapClientTemplate#setSqlMapClient
* @see SqlMapClientTemplate#setDataSource
*/
public class SqlMapClientFactoryBean implements FactoryBean<SqlMapClient>, InitializingBean {
private static final ThreadLocal<LobHandler> configTimeLobHandlerHolder = new ThreadLocal<LobHandler>();
/**
* Return the LobHandler for the currently configured iBATIS SqlMapClient,
* to be used by TypeHandler implementations like ClobStringTypeHandler.
* <p>This instance will be set before initialization of the corresponding
* SqlMapClient, and reset immediately afterwards. It is thus only available
* during configuration.
* @see #setLobHandler
* @see org.springframework.orm.ibatis.support.ClobStringTypeHandler
* @see org.springframework.orm.ibatis.support.BlobByteArrayTypeHandler
* @see org.springframework.orm.ibatis.support.BlobSerializableTypeHandler
*/
public static LobHandler getConfigTimeLobHandler() {
return configTimeLobHandlerHolder.get();
}
private Resource[] configLocations;
private Resource[] mappingLocations;
private Properties sqlMapClientProperties;
private DataSource dataSource;
private boolean useTransactionAwareDataSource = true;
private Class transactionConfigClass = ExternalTransactionConfig.class;
private Properties transactionConfigProperties;
private LobHandler lobHandler;
private SqlMapClient sqlMapClient;
public SqlMapClientFactoryBean() {
this.transactionConfigProperties = new Properties();
this.transactionConfigProperties.setProperty("SetAutoCommitAllowed", "false");
}
/**
* Set the location of the iBATIS SqlMapClient config file.
* A typical value is "WEB-INF/sql-map-config.xml".
* @see #setConfigLocations
*/
public void setConfigLocation(Resource configLocation) {
this.configLocations = (configLocation != null ? new Resource[] {configLocation} : null);
}
/**
* Set multiple locations of iBATIS SqlMapClient config files that
* are going to be merged into one unified configuration at runtime.
*/
public void setConfigLocations(Resource[] configLocations) {
this.configLocations = configLocations;
}
/**
* Set locations of iBATIS sql-map mapping files that are going to be
* merged into the SqlMapClient configuration at runtime.
* <p>This is an alternative to specifying "<sqlMap>" entries
* in a sql-map-client config file. This property being based on Spring's
* resource abstraction also allows for specifying resource patterns here:
* e.g. "/myApp/*-map.xml".
* <p>Note that this feature requires iBATIS 2.3.2; it will not work
* with any previous iBATIS version.
*/
public void setMappingLocations(Resource[] mappingLocations) {
this.mappingLocations = mappingLocations;
}
/**
* Set optional properties to be passed into the SqlMapClientBuilder, as
* alternative to a <code><properties></code> tag in the sql-map-config.xml
* file. Will be used to resolve placeholders in the config file.
* @see #setConfigLocation
* @see com.ibatis.sqlmap.client.SqlMapClientBuilder#buildSqlMapClient(java.io.InputStream, java.util.Properties)
*/
public void setSqlMapClientProperties(Properties sqlMapClientProperties) {
this.sqlMapClientProperties = sqlMapClientProperties;
}
/**
* Set the DataSource to be used by iBATIS SQL Maps. This will be passed to the
* SqlMapClient as part of a TransactionConfig instance.
* <p>If specified, this will override corresponding settings in the SqlMapClient
* properties. Usually, you will specify DataSource and transaction configuration
* <i>either</i> here <i>or</i> in SqlMapClient properties.
* <p>Specifying a DataSource for the SqlMapClient rather than for each individual
* DAO allows for lazy loading, for example when using PaginatedList results.
* <p>With a DataSource passed in here, you don't need to specify one for each DAO.
* Passing the SqlMapClient to the DAOs is enough, as it already carries a DataSource.
* Thus, it's recommended to specify the DataSource at this central location only.
* <p>Thanks to Brandon Goodin from the iBATIS team for the hint on how to make
* this work with Spring's integration strategy!
* @see #setTransactionConfigClass
* @see #setTransactionConfigProperties
* @see com.ibatis.sqlmap.client.SqlMapClient#getDataSource
* @see SqlMapClientTemplate#setDataSource
* @see SqlMapClientTemplate#queryForPaginatedList
*/
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
/**
* Set whether to use a transaction-aware DataSource for the SqlMapClient,
* i.e. whether to automatically wrap the passed-in DataSource with Spring's
* TransactionAwareDataSourceProxy.
* <p>Default is "true": When the SqlMapClient performs direct database operations
* outside of Spring's SqlMapClientTemplate (for example, lazy loading or direct
* SqlMapClient access), it will still participate in active Spring-managed
* transactions.
* <p>As a further effect, using a transaction-aware DataSource will apply
* remaining transaction timeouts to all created JDBC Statements. This means
* that all operations performed by the SqlMapClient will automatically
* participate in Spring-managed transaction timeouts.
* <p>Turn this flag off to get raw DataSource handling, without Spring transaction
* checks. Operations on Spring's SqlMapClientTemplate will still detect
* Spring-managed transactions, but lazy loading or direct SqlMapClient access won't.
* @see #setDataSource
* @see org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy
* @see org.springframework.jdbc.datasource.DataSourceTransactionManager
* @see SqlMapClientTemplate
* @see com.ibatis.sqlmap.client.SqlMapClient
*/
public void setUseTransactionAwareDataSource(boolean useTransactionAwareDataSource) {
this.useTransactionAwareDataSource = useTransactionAwareDataSource;
}
/**
* Set the iBATIS TransactionConfig class to use. Default is
* <code>com.ibatis.sqlmap.engine.transaction.external.ExternalTransactionConfig</code>.
* <p>Will only get applied when using a Spring-managed DataSource.
* An instance of this class will get populated with the given DataSource
* and initialized with the given properties.
* <p>The default ExternalTransactionConfig is appropriate if there is
* external transaction management that the SqlMapClient should participate
* in: be it Spring transaction management, EJB CMT or plain JTA. This
* should be the typical scenario. If there is no active transaction,
* SqlMapClient operations will execute SQL statements non-transactionally.
* <p>JdbcTransactionConfig or JtaTransactionConfig is only necessary
* when using the iBATIS SqlMapTransactionManager API instead of external
* transactions. If there is no explicit transaction, SqlMapClient operations
* will automatically start a transaction for their own scope (in contrast
* to the external transaction mode, see above).
* <p><b>It is strongly recommended to use iBATIS SQL Maps with Spring
* transaction management (or EJB CMT).</b> In this case, the default
* ExternalTransactionConfig is fine. Lazy loading and SQL Maps operations
* without explicit transaction demarcation will execute non-transactionally.
* <p>Even with Spring transaction management, it might be desirable to
* specify JdbcTransactionConfig: This will still participate in existing
* Spring-managed transactions, but lazy loading and operations without
* explicit transaction demaration will execute in their own auto-started
* transactions. However, this is usually not necessary.
* @see #setDataSource
* @see #setTransactionConfigProperties
* @see com.ibatis.sqlmap.engine.transaction.TransactionConfig
* @see com.ibatis.sqlmap.engine.transaction.external.ExternalTransactionConfig
* @see com.ibatis.sqlmap.engine.transaction.jdbc.JdbcTransactionConfig
* @see com.ibatis.sqlmap.engine.transaction.jta.JtaTransactionConfig
* @see com.ibatis.sqlmap.client.SqlMapTransactionManager
*/
public void setTransactionConfigClass(Class transactionConfigClass) {
if (transactionConfigClass == null || !TransactionConfig.class.isAssignableFrom(transactionConfigClass)) {
throw new IllegalArgumentException("Invalid transactionConfigClass: does not implement " +
"com.ibatis.sqlmap.engine.transaction.TransactionConfig");
}
this.transactionConfigClass = transactionConfigClass;
}
/**
* Set properties to be passed to the TransactionConfig instance used
* by this SqlMapClient. Supported properties depend on the concrete
* TransactionConfig implementation used:
* <p><ul>
* <li><b>ExternalTransactionConfig</b> supports "DefaultAutoCommit"
* (default: false) and "SetAutoCommitAllowed" (default: true).
* Note that Spring uses SetAutoCommitAllowed = false as default,
* in contrast to the iBATIS default, to always keep the original
* autoCommit value as provided by the connection pool.
* <li><b>JdbcTransactionConfig</b> does not supported any properties.
* <li><b>JtaTransactionConfig</b> supports "UserTransaction"
* (no default), specifying the JNDI location of the JTA UserTransaction
* (usually "java:comp/UserTransaction").
* </ul>
* @see com.ibatis.sqlmap.engine.transaction.TransactionConfig#initialize
* @see com.ibatis.sqlmap.engine.transaction.external.ExternalTransactionConfig
* @see com.ibatis.sqlmap.engine.transaction.jdbc.JdbcTransactionConfig
* @see com.ibatis.sqlmap.engine.transaction.jta.JtaTransactionConfig
*/
public void setTransactionConfigProperties(Properties transactionConfigProperties) {
this.transactionConfigProperties = transactionConfigProperties;
}
/**
* Set the LobHandler to be used by the SqlMapClient.
* Will be exposed at config time for TypeHandler implementations.
* @see #getConfigTimeLobHandler
* @see com.ibatis.sqlmap.engine.type.TypeHandler
* @see org.springframework.orm.ibatis.support.ClobStringTypeHandler
* @see org.springframework.orm.ibatis.support.BlobByteArrayTypeHandler
* @see org.springframework.orm.ibatis.support.BlobSerializableTypeHandler
*/
public void setLobHandler(LobHandler lobHandler) {
this.lobHandler = lobHandler;
}
public void afterPropertiesSet() throws Exception {
if (this.lobHandler != null) {
// Make given LobHandler available for SqlMapClient configuration.
// Do early because because mapping resource might refer to custom types.
configTimeLobHandlerHolder.set(this.lobHandler);
}
try {
this.sqlMapClient = buildSqlMapClient(this.configLocations, this.mappingLocations, this.sqlMapClientProperties);
// Tell the SqlMapClient to use the given DataSource, if any.
if (this.dataSource != null) {
TransactionConfig transactionConfig = (TransactionConfig) this.transactionConfigClass.newInstance();
DataSource dataSourceToUse = this.dataSource;
if (this.useTransactionAwareDataSource && !(this.dataSource instanceof TransactionAwareDataSourceProxy)) {
dataSourceToUse = new TransactionAwareDataSourceProxy(this.dataSource);
}
transactionConfig.setDataSource(dataSourceToUse);
transactionConfig.initialize(this.transactionConfigProperties);
applyTransactionConfig(this.sqlMapClient, transactionConfig);
}
}
finally {
if (this.lobHandler != null) {
// Reset LobHandler holder.
configTimeLobHandlerHolder.remove();
}
}
}
/**
* Build a SqlMapClient instance based on the given standard configuration.
* <p>The default implementation uses the standard iBATIS {@link SqlMapClientBuilder}
* API to build a SqlMapClient instance based on an InputStream (if possible,
* on iBATIS 2.3 and higher) or on a Reader (on iBATIS up to version 2.2).
* @param configLocations the config files to load from
* @param properties the SqlMapClient properties (if any)
* @return the SqlMapClient instance (never <code>null</code>)
* @throws IOException if loading the config file failed
* @see com.ibatis.sqlmap.client.SqlMapClientBuilder#buildSqlMapClient
*/
protected SqlMapClient buildSqlMapClient(
Resource[] configLocations, Resource[] mappingLocations, Properties properties)
throws IOException {
if (ObjectUtils.isEmpty(configLocations)) {
throw new IllegalArgumentException("At least 1 'configLocation' entry is required");
}
SqlMapClient client = null;
SqlMapConfigParser configParser = new SqlMapConfigParser();
for (Resource configLocation : configLocations) {
InputStream is = configLocation.getInputStream();
try {
client = configParser.parse(is, properties);
}
catch (RuntimeException ex) {
throw new NestedIOException("Failed to parse config resource: " + configLocation, ex.getCause());
}
}
if (mappingLocations != null) {
SqlMapParser mapParser = SqlMapParserFactory.createSqlMapParser(configParser);
for (Resource mappingLocation : mappingLocations) {
try {
mapParser.parse(mappingLocation.getInputStream());
}
catch (NodeletException ex) {
throw new NestedIOException("Failed to parse mapping resource: " + mappingLocation, ex);
}
}
}
return client;
}
/**
* Apply the given iBATIS TransactionConfig to the SqlMapClient.
* <p>The default implementation casts to ExtendedSqlMapClient, retrieves the maximum
* number of concurrent transactions from the SqlMapExecutorDelegate, and sets
* an iBATIS TransactionManager with the given TransactionConfig.
* @param sqlMapClient the SqlMapClient to apply the TransactionConfig to
* @param transactionConfig the iBATIS TransactionConfig to apply
* @see com.ibatis.sqlmap.engine.impl.ExtendedSqlMapClient
* @see com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate#getMaxTransactions
* @see com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate#setTxManager
*/
protected void applyTransactionConfig(SqlMapClient sqlMapClient, TransactionConfig transactionConfig) {
if (!(sqlMapClient instanceof ExtendedSqlMapClient)) {
throw new IllegalArgumentException(
"Cannot set TransactionConfig with DataSource for SqlMapClient if not of type " +
"ExtendedSqlMapClient: " + sqlMapClient);
}
ExtendedSqlMapClient extendedClient = (ExtendedSqlMapClient) sqlMapClient;
transactionConfig.setMaximumConcurrentTransactions(extendedClient.getDelegate().getMaxTransactions());
extendedClient.getDelegate().setTxManager(new TransactionManager(transactionConfig));
}
public SqlMapClient getObject() {
return this.sqlMapClient;
}
public Class<? extends SqlMapClient> getObjectType() {
return (this.sqlMapClient != null ? this.sqlMapClient.getClass() : SqlMapClient.class);
}
public boolean isSingleton() {
return true;
}
/**
* Inner class to avoid hard-coded iBATIS 2.3.2 dependency (XmlParserState class).
*/
private static class SqlMapParserFactory {
public static SqlMapParser createSqlMapParser(SqlMapConfigParser configParser) {
// Ideally: XmlParserState state = configParser.getState();
// Should raise an enhancement request with iBATIS...
XmlParserState state = null;
try {
Field stateField = SqlMapConfigParser.class.getDeclaredField("state");
stateField.setAccessible(true);
state = (XmlParserState) stateField.get(configParser);
}
catch (Exception ex) {
throw new IllegalStateException("iBATIS 2.3.2 'state' field not found in SqlMapConfigParser class - " +
"please upgrade to IBATIS 2.3.2 or higher in order to use the new 'mappingLocations' feature. " + ex);
}
return new SqlMapParser(state);
}
}
}
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