UninitializedSolrClientAdaptor.java

/**
 * Copyright (c) Codice Foundation
 * <p>
 * This is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser
 * General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or any later version.
 * <p>
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details. A copy of the GNU Lesser General Public License
 * is distributed along with this program and can be found at
 * <http://www.gnu.org/licenses/lgpl.html>.
 */
package ddf.catalog.cache.solr.impl;

import java.io.IOException;

import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.response.UpdateResponse;
import org.apache.solr.common.util.NamedList;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Implementation of the {@link SolrClientAdaptor} interface not connected to any
 * {@link org.apache.solr.client.solrj.SolrClient}. All operations are no-op.
 */
class UninitializedSolrClientAdaptor implements SolrClientAdaptor.State {

    private static final Logger LOGGER =
            LoggerFactory.getLogger(UninitializedSolrClientAdaptor.class);

    private static final UninitializedSolrClientAdaptor INSTANCE = new UninitializedSolrClientAdaptor();

    static UninitializedSolrClientAdaptor getInstance() {
        return INSTANCE;
    }

    private UninitializedSolrClientAdaptor() {
        // Singleton
    }

    @Override
    public void commit() throws SolrServerException, IOException {
        LOGGER.debug("Called commit on un-initialized SolrClientAdaptor. Ignoring.");
    }

    @Override
    public void close() throws IOException {
        LOGGER.debug("Called close on un-initialized SolrClientAdaptor. Ignoring.");
    }

    @Override
    public UpdateResponse deleteByQuery(String query) throws SolrServerException, IOException {
        LOGGER.debug("Called deleteByQuery on un-initialized SolrClientAdaptor. Ignoring.");
        UpdateResponse updateResponse = new UpdateResponse();
        updateResponse.setElapsedTime(0);
        updateResponse.setRequestUrl("");
        updateResponse.setResponse(new NamedList<>());
        return updateResponse;
    }
}