org.cloudgraph.rdb.connect.JNDIDataSourceProvider.java Source code

Introduction

Here is the source code for org.cloudgraph.rdb.connect.JNDIDataSourceProvider.java

Source

/**
 * Copyright 2017 TerraMeta Software, Inc.
 * 
 * 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.cloudgraph.rdb.connect;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.plasma.runtime.ConfigurationConstants;
import org.plasma.runtime.DataAccessProviderName;
import org.plasma.runtime.PlasmaRuntime;
import org.plasma.runtime.Property;
import org.plasma.sdo.access.DataAccessException;

/**
 * Supplies connections using a JNDI registered datasource.
 */
public class JNDIDataSourceProvider implements DataSourceProvder {
    private static final Log log = LogFactory.getLog(JNDIDataSourceProvider.class);
    protected DataSource datasource;

    public JNDIDataSourceProvider() {
        Properties props = new Properties();
        for (Property property : PlasmaRuntime.getInstance().getDataAccessProvider(DataAccessProviderName.JDBC)
                .getProperties()) {
            props.put(property.getName(), property.getValue());
        }

        String datasourceName = props.getProperty(ConfigurationConstants.JDBC_DATASOURCE_NAME);
        if (datasourceName == null)
            throw new DataAccessException("cannot lookup datasource - datasource name property '"
                    + ConfigurationConstants.JDBC_DATASOURCE_NAME + "' not found in configuration for "
                    + "data access provider '" + DataAccessProviderName.JDBC.name()
                    + "' - a fully qualified JNDI name is required");
        try {
            Context initialContext = new InitialContext();
            this.datasource = (DataSource) initialContext.lookup(datasourceName);
            if (this.datasource == null) {
                throw new DataAccessException("cannot lookup datasource '" + datasourceName + "'");
            }
        } catch (NamingException ex) {
            log.error("cannot lookup datasource '" + datasourceName + "'", ex);
            throw new DataAccessException(ex);
        }
    }

    @Override
    public Connection getConnection() throws SQLException {
        return this.datasource.getConnection();
    }

}