Example usage for org.springframework.jdbc.datasource LazyConnectionDataSourceProxy LazyConnectionDataSourceProxy

Introduction

In this page you can find the example usage for org.springframework.jdbc.datasource LazyConnectionDataSourceProxy LazyConnectionDataSourceProxy.

Prototype

public LazyConnectionDataSourceProxy(DataSource targetDataSource) 

Source Link

Document

Create a new LazyConnectionDataSourceProxy.

Usage

From source file:org.jamwiki.db.DatabaseConnection.java

/**
 * Static method that will configure a DataSource based on the Environment setup.
 *///w  ww  .j a v  a2s . com
private synchronized static void configDataSource() throws SQLException {
    if (dataSource != null) {
        closeConnectionPool(); // DataSource has already been created so remove it
    }
    String url = Environment.getValue(Environment.PROP_DB_URL);
    DataSource targetDataSource = null;
    if (url.startsWith("jdbc:")) {
        try {
            // Use an internal "LocalDataSource" configured from the Environment
            targetDataSource = new LocalDataSource();
        } catch (ClassNotFoundException e) {
            logger.error("Failure while configuring local data source", e);
            throw new SQLException("Failure while configuring local data source: " + e.toString());
        }
    } else {
        try {
            // Use a container DataSource obtained via JNDI lookup
            // TODO: Should try prefix java:comp/env/ if not already part of the JNDI name?
            Context ctx = new InitialContext();
            targetDataSource = (DataSource) ctx.lookup(url);
        } catch (NamingException e) {
            logger.error("Failure while configuring JNDI data source with URL: " + url, e);
            throw new SQLException(
                    "Unable to configure JNDI data source with URL " + url + ": " + e.toString());
        }
    }
    dataSource = new LazyConnectionDataSourceProxy(targetDataSource);
    transactionManager = new DataSourceTransactionManager(targetDataSource);
}

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From source file:org.opennms.core.db.DataSourceFactory.java

/**
 * <p>init</p>/* w  w w.  j av  a  2 s.  co m*/
 *
 * @param dsName a {@link java.lang.String} object.
 * @throws java.io.IOException if any.
 * @throws org.exolab.castor.xml.MarshalException if any.
 * @throws org.exolab.castor.xml.ValidationException if any.
 * @throws java.lang.ClassNotFoundException if any.
 * @throws java.beans.PropertyVetoException if any.
 * @throws java.sql.SQLException if any.
 */
public static synchronized void init(final String dsName) throws IOException, MarshalException,
        ValidationException, ClassNotFoundException, PropertyVetoException, SQLException {
    if (isLoaded(dsName)) {
        // init already called - return
        // to reload, reload() will need to be called
        return;
    }

    String factoryClass = null;
    final File cfgFile = ConfigFileConstants.getFile(ConfigFileConstants.OPENNMS_DATASOURCE_CONFIG_FILE_NAME);
    DataSourceConfiguration dsc = null;
    ConnectionPool connectionPool = null;
    FileInputStream fileInputStream = null;
    try {
        fileInputStream = new FileInputStream(cfgFile);
        dsc = CastorUtils.unmarshal(DataSourceConfiguration.class, fileInputStream);
        connectionPool = dsc.getConnectionPool();
        if (connectionPool != null) {
            factoryClass = connectionPool.getFactory();
        }
    } finally {
        IOUtils.closeQuietly(fileInputStream);
    }

    final String configPath = cfgFile.getPath();
    ClosableDataSource dataSource = null;
    final String defaultClassName = DEFAULT_FACTORY_CLASS.getName();
    try {
        final Class<?> clazz = Class.forName(factoryClass);
        final Constructor<?> constructor = clazz.getConstructor(new Class<?>[] { String.class, String.class });
        dataSource = (ClosableDataSource) constructor.newInstance(new Object[] { configPath, dsName });
    } catch (final Throwable t) {
        LOG.debug("Unable to load {}, falling back to the default dataSource ({})", factoryClass,
                defaultClassName, t);
        try {
            final Constructor<?> constructor = ((Class<?>) DEFAULT_FACTORY_CLASS)
                    .getConstructor(new Class<?>[] { String.class, String.class });
            dataSource = (ClosableDataSource) constructor.newInstance(new Object[] { configPath, dsName });
        } catch (final Throwable cause) {
            LOG.error("Unable to load {}.", DEFAULT_FACTORY_CLASS.getName(), cause);
            throw new SQLException("Unable to load " + defaultClassName + ".", cause);
        }
    }

    final ClosableDataSource runnableDs = dataSource;
    m_closers.add(new Runnable() {
        @Override
        public void run() {
            try {
                runnableDs.close();
            } catch (final Throwable cause) {
                LOG.info("Unable to close datasource {}.", dsName, cause);
            }
        }
    });

    if (connectionPool != null) {
        dataSource.setIdleTimeout(connectionPool.getIdleTimeout());
        dataSource.setLoginTimeout(connectionPool.getLoginTimeout());
        dataSource.setMinPool(connectionPool.getMinPool());
        dataSource.setMaxPool(connectionPool.getMaxPool());
        dataSource.setMaxSize(connectionPool.getMaxSize());
    }

    // Springframework provided proxies that make working with transactions much easier
    final LazyConnectionDataSourceProxy lazyProxy = new LazyConnectionDataSourceProxy(dataSource);

    setInstance(dsName, lazyProxy);
}

---

From source file:org.opennms.netmgt.config.DataSourceFactory.java

/**
 * <p>init</p>/*from   w w w.j a  v a  2 s .  c  o m*/
 *
 * @param dsName a {@link java.lang.String} object.
 * @throws java.io.IOException if any.
 * @throws org.exolab.castor.xml.MarshalException if any.
 * @throws org.exolab.castor.xml.ValidationException if any.
 * @throws java.lang.ClassNotFoundException if any.
 * @throws java.beans.PropertyVetoException if any.
 * @throws java.sql.SQLException if any.
 */
public static synchronized void init(final String dsName) throws IOException, MarshalException,
        ValidationException, ClassNotFoundException, PropertyVetoException, SQLException {
    if (isLoaded(dsName)) {
        // init already called - return
        // to reload, reload() will need to be called
        return;
    }

    String factoryClass = null;
    final File cfgFile = ConfigFileConstants.getFile(ConfigFileConstants.OPENNMS_DATASOURCE_CONFIG_FILE_NAME);
    DataSourceConfiguration dsc = null;
    ConnectionPool connectionPool = null;
    FileInputStream fileInputStream = null;
    try {
        fileInputStream = new FileInputStream(cfgFile);
        dsc = CastorUtils.unmarshal(DataSourceConfiguration.class, fileInputStream);
        connectionPool = dsc.getConnectionPool();
        if (connectionPool != null) {
            factoryClass = connectionPool.getFactory();
        }
    } finally {
        IOUtils.closeQuietly(fileInputStream);
    }

    final String configPath = cfgFile.getPath();
    ClosableDataSource dataSource = null;
    final String defaultClassName = DEFAULT_FACTORY_CLASS.getName();
    try {
        final Class<?> clazz = Class.forName(factoryClass);
        final Constructor<?> constructor = clazz.getConstructor(new Class<?>[] { String.class, String.class });
        dataSource = (ClosableDataSource) constructor.newInstance(new Object[] { configPath, dsName });
    } catch (final Throwable t) {
        LogUtils.debugf(DataSourceFactory.class, t,
                "Unable to load %s, falling back to the default dataSource (%s)", factoryClass,
                defaultClassName);
        try {
            final Constructor<?> constructor = ((Class<?>) DEFAULT_FACTORY_CLASS)
                    .getConstructor(new Class<?>[] { String.class, String.class });
            dataSource = (ClosableDataSource) constructor.newInstance(new Object[] { configPath, dsName });
        } catch (final Throwable cause) {
            LogUtils.errorf(DataSourceFactory.class, cause, "Unable to load %s.",
                    DEFAULT_FACTORY_CLASS.getName());
            throw new SQLException("Unable to load " + defaultClassName + ".", cause);
        }
    }

    final ClosableDataSource runnableDs = dataSource;
    m_closers.add(new Runnable() {
        public void run() {
            try {
                runnableDs.close();
            } catch (final Throwable cause) {
                LogUtils.infof(DataSourceFactory.class, cause, "Unable to close datasource %s.", dsName);
            }
        }
    });

    if (connectionPool != null) {
        dataSource.setIdleTimeout(connectionPool.getIdleTimeout());
        dataSource.setLoginTimeout(connectionPool.getLoginTimeout());
        dataSource.setMinPool(connectionPool.getMinPool());
        dataSource.setMaxPool(connectionPool.getMaxPool());
        dataSource.setMaxSize(connectionPool.getMaxSize());
    }

    // Springframework provided proxies that make working with transactions much easier
    final LazyConnectionDataSourceProxy lazyProxy = new LazyConnectionDataSourceProxy(dataSource);

    setInstance(dsName, lazyProxy);
}

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