Examples of org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy

Package org.springframework.jdbc.datasource

Examples of org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy

org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy
Proxy for a target JDBC {@link javax.sql.DataSource}, adding awareness of Spring-managed transactions. Similar to a transactional JNDI DataSource as provided by a J2EE server.
Data access code that should remain unaware of Spring's data access support can work with this proxy to seamlessly participate in Spring-managed transactions. Note that the transaction manager, for example {@link DataSourceTransactionManager}, still needs to work with the underlying DataSource, not with this proxy.
Make sure that TransactionAwareDataSourceProxy is the outermost DataSource of a chain of DataSource proxies/adapters. TransactionAwareDataSourceProxy can delegate either directly to the target connection pool or to some intermediary proxy/adapter like {@link LazyConnectionDataSourceProxy} or{@link UserCredentialsDataSourceAdapter}.
Delegates to {@link DataSourceUtils} for automatically participating inthread-bound transactions, for example managed by {@link DataSourceTransactionManager}. getConnection calls and close calls on returned Connections will behave properly within a transaction, i.e. always operate on the transactional Connection. If not within a transaction, normal DataSource behavior applies.
This proxy allows data access code to work with the plain JDBC API and still participate in Spring-managed transactions, similar to JDBC code in a J2EE/JTA environment. However, if possible, use Spring's DataSourceUtils, JdbcTemplate or JDBC operation objects to get transaction participation even without a proxy for the target DataSource, avoiding the need to define such a proxy in the first place.
As a further effect, using a transaction-aware DataSource will apply remaining transaction timeouts to all created JDBC (Prepared/Callable)Statement. This means that all operations performed through standard JDBC will automatically participate in Spring-managed transaction timeouts.
NOTE: This DataSource proxy needs to return wrapped Connections (which implement the {@link ConnectionProxy} interface) in order to handleclose calls properly. Therefore, the returned Connections cannot be cast to a native JDBC Connection type like OracleConnection or to a connection pool implementation type. Use a corresponding {@link org.springframework.jdbc.support.nativejdbc.NativeJdbcExtractor}to retrieve the native JDBC Connection. @author Juergen Hoeller @since 1.1 @see javax.sql.DataSource#getConnection() @see java.sql.Connection#close() @see DataSourceUtils#doGetConnection @see DataSourceUtils#applyTransactionTimeout @see DataSourceUtils#doReleaseConnection

    DataSource originalDataSource = super.getDataSource(jcdAlias);
    if (originalDataSource instanceof TransactionAwareDataSourceProxy) {
      return originalDataSource;
    }
    else {
      return new TransactionAwareDataSourceProxy(originalDataSource);
    }
  }

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  public ProcessEngineConfigurationImpl setDataSource(DataSource dataSource) {
    if(dataSource instanceof TransactionAwareDataSourceProxy) {
      return super.setDataSource(dataSource);
    } else {
      // Wrap datasource in Transaction-aware proxy
      DataSource proxiedDataSource = new TransactionAwareDataSourceProxy(dataSource);
      return super.setDataSource(proxiedDataSource);
    }
  }

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    return new DefaultDSLContext(config);
  }


  @Bean
  public ConnectionProvider connectionProvider(DataSource dataSource) {
    return new DataSourceConnectionProvider(new TransactionAwareDataSourceProxy(dataSource));
  }

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    }


    @Provides
    @Singleton
    DataSourceTransactionManager provideDataSourceTransactionManager() {
        return new DataSourceTransactionManager(new TransactionAwareDataSourceProxy(DATA_SOURCE));
    }

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      // 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);
      }

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   */
  protected DataSource getDataSourceToUse(DataSource originalDataSource) {
    if (originalDataSource instanceof TransactionAwareDataSourceProxy) {
      return originalDataSource;
    }
    return new TransactionAwareDataSourceProxy(originalDataSource);
  }

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  protected DataSource getDataSourceToUse(DataSource originalDataSource) {
    if (originalDataSource instanceof TransactionAwareDataSourceProxy) {
      return originalDataSource;
    }
    else {
      return new TransactionAwareDataSourceProxy(originalDataSource);
    }
  }

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   */
  protected DataSource getDataSourceToUse(DataSource originalDataSource) {
    if (originalDataSource instanceof TransactionAwareDataSourceProxy) {
      return originalDataSource;
    }
    return new TransactionAwareDataSourceProxy(originalDataSource);
  }

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      // 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);
      }

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      // 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);
      }

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