DefaultLogAppenderBuilder.java

/*
 * Copyright 2014-2016 CyberVision, 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.kaaproject.kaa.server.operations.service.logs;

import org.kaaproject.kaa.common.dto.logs.LogAppenderDto;
import org.kaaproject.kaa.server.common.log.shared.appender.LogAppender;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

@Component
public class DefaultLogAppenderBuilder implements LogAppenderBuilder {

  private static final Logger LOG = LoggerFactory.getLogger(DefaultLogAppenderBuilder.class);

  public DefaultLogAppenderBuilder() {
    super();
  }

  @Override
  public LogAppender getAppender(LogAppenderDto appenderConfig)
      throws ReflectiveOperationException {
    if (appenderConfig == null) {
      throw new IllegalArgumentException("appender config can't be null");
    }
    try {
      @SuppressWarnings("unchecked")
      Class<LogAppender> appenderClass = (Class<LogAppender>) Class
          .forName(appenderConfig.getPluginClassName());
      LogAppender logAppender = appenderClass.newInstance();
      LOG.debug("Init log appender [{}] with appender configuration [{}].",
          logAppender, appenderConfig);
      logAppender.setName(appenderConfig.getName());
      logAppender.setAppenderId(appenderConfig.getId());
      logAppender.setApplicationToken(appenderConfig.getApplicationToken());
      logAppender.init(appenderConfig);
      return logAppender;
    } catch (ClassNotFoundException ex) {
      LOG.error("Unable to find custom appender class {}", appenderConfig.getPluginClassName());
      throw ex;
    } catch (InstantiationException | IllegalAccessException ex) {
      LOG.error("Unable to instantiate custom appender from class {}",
          appenderConfig.getPluginClassName());
      throw ex;
    }
  }
}