    001    /*
    002     * Licensed to the Apache Software Foundation (ASF) under one or more
    003     * contributor license agreements. See the NOTICE file distributed with
    004     * this work for additional information regarding copyright ownership.
    005     * The ASF licenses this file to You under the Apache license, Version 2.0
    006     * (the "License"); you may not use this file except in compliance with
    007     * the License. You may obtain a copy of the License at
    008     *
    009     *      http://www.apache.org/licenses/LICENSE-2.0
    010     *
    011     * Unless required by applicable law or agreed to in writing, software
    012     * distributed under the License is distributed on an "AS IS" BASIS,
    013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014     * See the license for the specific language governing permissions and
    015     * limitations under the license.
    016     */
    017    package org.apache.logging.log4j.nosql.appender.couchdb;
    018
    019    import java.util.Map;
    020    import java.util.concurrent.atomic.AtomicBoolean;
    021
    022    import org.apache.logging.log4j.core.appender.AppenderLoggingException;
    023    import org.apache.logging.log4j.nosql.appender.DefaultNoSqlObject;
    024    import org.apache.logging.log4j.nosql.appender.NoSqlConnection;
    025    import org.apache.logging.log4j.nosql.appender.NoSqlObject;
    026    import org.lightcouch.CouchDbClient;
    027    import org.lightcouch.Response;
    028
    029    /**
    030     * The Apache CouchDB implementation of {@link NoSqlConnection}.
    031     */
    032    public final class CouchDbConnection implements NoSqlConnection<Map<String, Object>, DefaultNoSqlObject> {
    033        private final CouchDbClient client;
    034        private final AtomicBoolean closed = new AtomicBoolean(false);
    035
    036        public CouchDbConnection(final CouchDbClient client) {
    037            this.client = client;
    038        }
    039
    040        @Override
    041        public DefaultNoSqlObject createObject() {
    042            return new DefaultNoSqlObject();
    043        }
    044
    045        @Override
    046        public DefaultNoSqlObject[] createList(final int length) {
    047            return new DefaultNoSqlObject[length];
    048        }
    049
    050        @Override
    051        public void insertObject(final NoSqlObject<Map<String, Object>> object) {
    052            try {
    053                final Response response = this.client.save(object.unwrap());
    054                if (response.getError() != null && response.getError().length() > 0) {
    055                    throw new AppenderLoggingException("Failed to write log event to CouchDB due to error: " +
    056                            response.getError() + '.');
    057                }
    058            } catch (final Exception e) {
    059                throw new AppenderLoggingException("Failed to write log event to CouchDB due to error: " + e.getMessage(),
    060                        e);
    061            }
    062        }
    063
    064        @Override
    065        public void close() {
    066            if (this.closed.compareAndSet(false, true)) {
    067                this.client.shutdown();
    068            }
    069        }
    070
    071        @Override
    072        public boolean isClosed() {
    073            return this.closed.get();
    074        }
    075    }