org.apache.solr.client.solrj.io.sql.DriverImpl.java Source code

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Here is the source code for org.apache.solr.client.solrj.io.sql.DriverImpl.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.solr.client.solrj.io.sql;

import java.net.URI;
import java.net.URISyntaxException;
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.DriverPropertyInfo;
import java.sql.SQLException;
import java.util.List;
import java.util.Properties;
import java.util.logging.Logger;

import org.apache.http.NameValuePair;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.solr.common.util.SuppressForbidden;

/**
 * Get a Connection with with a url and properties.
 *
 * jdbc:solr://zkhost:port?collection=collection&aggregationMode=map_reduce
 **/

public class DriverImpl implements Driver {

    static {
        try {
            DriverManager.registerDriver(new DriverImpl());
        } catch (SQLException e) {
            throw new RuntimeException("Can't register driver!", e);
        }
    }

    public Connection connect(String url, Properties props) throws SQLException {
        if (!acceptsURL(url)) {
            return null;
        }

        URI uri = processUrl(url);

        loadParams(uri, props);

        if (!props.containsKey("collection")) {
            throw new SQLException(
                    "The connection url has no connection properties. At a mininum the collection must be specified.");
        }
        String collection = (String) props.remove("collection");

        if (!props.containsKey("aggregationMode")) {
            props.setProperty("aggregationMode", "facet");
        }

        // JDBC requires metadata like field names from the SQLHandler. Force this property to be true.
        props.setProperty("includeMetadata", "true");

        String zkHost = uri.getAuthority() + uri.getPath();

        return new ConnectionImpl(url, zkHost, collection, props);
    }

    public Connection connect(String url) throws SQLException {
        return connect(url, new Properties());
    }

    public int getMajorVersion() {
        return 1;
    }

    public int getMinorVersion() {
        return 0;
    }

    public boolean acceptsURL(String url) {
        return url != null && url.startsWith("jdbc:solr");
    }

    public boolean jdbcCompliant() {
        return false;
    }

    @SuppressForbidden(reason = "Required by jdbc")

    public Logger getParentLogger() {
        return null;
    }

    public DriverPropertyInfo[] getPropertyInfo(String url, Properties info) {
        return null;
    }

    protected URI processUrl(String url) throws SQLException {
        URI uri;
        try {
            uri = new URI(url.replaceFirst("jdbc:", ""));
        } catch (URISyntaxException e) {
            throw new SQLException(e);
        }

        if (uri.getAuthority() == null) {
            throw new SQLException("The zkHost must not be null");
        }

        return uri;
    }

    private void loadParams(URI uri, Properties props) throws SQLException {
        List<NameValuePair> parsedParams = URLEncodedUtils.parse(uri, "UTF-8");
        for (NameValuePair pair : parsedParams) {
            if (pair.getValue() != null) {
                props.put(pair.getName(), pair.getValue());
            } else {
                props.put(pair.getName(), "");
            }
        }
    }
}