| /* |
| * 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.nutch.fetcher; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.nutch.publisher.NutchPublishers; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.lang.invoke.MethodHandles; |
| |
| /** |
| * This class handles the publishing of the events to the queue implementation. |
| * |
| */ |
| public class FetcherThreadPublisher { |
| |
| private static NutchPublishers publisher; |
| private static final Logger LOG = LoggerFactory |
| .getLogger(MethodHandles.lookup().lookupClass()); |
| |
| /** |
| * Configure all registered publishers |
| * @param conf {@link org.apache.hadoop.conf.Configuration Configuration} to be used |
| */ |
| public FetcherThreadPublisher(Configuration conf) { |
| LOG.info("Setting up publishers"); |
| publisher = new NutchPublishers(conf); |
| if(!publisher.setConfig(conf)) |
| publisher = null; |
| } |
| |
| /** |
| * Publish event to all registered publishers |
| * @param event {@link org.apache.nutch.fetcher.FetcherThreadEvent Event} to be published |
| * @param conf {@link org.apache.hadoop.conf.Configuration Configuration} to be used |
| */ |
| public void publish(FetcherThreadEvent event, Configuration conf) { |
| if(publisher!=null) { |
| publisher.publish(event, conf); |
| } |
| else { |
| LOG.warn("Could not instantiate publisher implementation, continuing without publishing"); |
| } |
| } |
| |
| } |