com.couchbase.sqoop.manager.CouchbaseFactory.java Source code

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Here is the source code for com.couchbase.sqoop.manager.CouchbaseFactory.java

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/**
 * Copyright 2011-2012 Couchbase, 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 com.couchbase.sqoop.manager;

import com.cloudera.sqoop.SqoopOptions;
import com.cloudera.sqoop.manager.ConnManager;
import com.cloudera.sqoop.manager.DefaultManagerFactory;
import com.cloudera.sqoop.manager.ManagerFactory;
import com.cloudera.sqoop.metastore.JobData;

import java.lang.reflect.Constructor;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Contains instantiation code for the CouchbaseManager implementation
 * in Sqoop.
 */
public class CouchbaseFactory extends ManagerFactory {

    public static final Log LOG = LogFactory.getLog(DefaultManagerFactory.class.getName());

    @Override
    public ConnManager accept(JobData data) {
        SqoopOptions options = data.getSqoopOptions();

        if (null != options.getConnManagerClassName()) {
            String className = options.getConnManagerClassName();

            ConnManager connManager = null;
            try {
                Class<ConnManager> cls = (Class<ConnManager>) Class.forName(className);
                Constructor<ConnManager> constructor = cls.getDeclaredConstructor(SqoopOptimnbons.class);
                connManager = constructor.newInstance(options);
            } catch (Exception e) {
                System.err.println("problem finding the connection manager for class name :" + className);
                // Log the stack trace for this exception
                LOG.debug(e.getMessage(), e);
                // Print exception message.
                System.err.println(e.getMessage());
            }
            return connManager;
        }

        String connectStr = options.getConnectString();

        // java.net.URL follows RFC-2396 literally, which does not allow a ':'
        // character in the scheme component (section 3.1). JDBC connect strings,
        // however, commonly have a multi-scheme addressing system. e.g.,
        // jdbc:mysql://...; so we cannot parse the scheme component via URL
        // objects. Instead, attempt to pull out the scheme as best as we can.

        // First, see if this is of the form [scheme://hostname-and-etc..]
        int schemeStopIdx = connectStr.indexOf("//");
        if (-1 == schemeStopIdx) {
            // If no hostname start marker ("//"), then look for the right-most ':'
            // character.
            schemeStopIdx = connectStr.lastIndexOf(':');
            if (-1 == schemeStopIdx) {
                // Warn that this is nonstandard. But we should be as permissive
                // as possible here and let the ConnectionManagers themselves throw
                // out the connect string if it doesn't make sense to them.
                LOG.warn("Could not determine scheme component of connect string");

                // Use the whole string.
                schemeStopIdx = connectStr.length();
            }
        }

        String scheme = connectStr.substring(0, schemeStopIdx);

        if (null == scheme) {
            // We don't know if this is a mysql://, hsql://, etc.
            // Can't do anything with this.
            LOG.warn("Null scheme associated with connect string.");
            return null;
        }

        LOG.debug("Trying with scheme: " + scheme);

        if (scheme.equals("http:")) {
            return new CouchbaseManager(options);
        } else {
            return null;
        }
    }
}