/* * 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 * * 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.streams.facebook.provider.pagefeed; import org.apache.streams.config.ComponentConfigurator; import org.apache.streams.config.StreamsConfiguration; import org.apache.streams.config.StreamsConfigurator; import org.apache.streams.core.StreamsDatum; import org.apache.streams.facebook.FacebookConfiguration; import org.apache.streams.facebook.provider.FacebookDataCollector; import org.apache.streams.facebook.provider.FacebookProvider; import org.apache.streams.facebook.provider.page.FacebookPageProvider; import org.apache.streams.jackson.StreamsJacksonMapper; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.ObjectMapper; import com.google.common.base.Preconditions; import com.google.common.util.concurrent.Uninterruptibles; import com.typesafe.config.Config; import com.typesafe.config.ConfigFactory; import com.typesafe.config.ConfigParseOptions; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.PrintStream; import java.util.concurrent.TimeUnit; /** * FacebookPageFeedProvider provides content from facebook public page. */ public class FacebookPageFeedProvider extends FacebookProvider { public static final String STREAMS_ID = "FacebookPageFeedProvider"; private static final Logger LOGGER = LoggerFactory.getLogger(FacebookPageProvider.class); private static ObjectMapper MAPPER = StreamsJacksonMapper.getInstance(); public FacebookPageFeedProvider() { super(); } public FacebookPageFeedProvider(FacebookConfiguration config) { super(config); } @Override protected FacebookDataCollector getDataCollector() { return new FacebookPageFeedDataCollector(super.datums, super.configuration); } /** * Run FacebookPageFeedProvider from command line. * @param args configfile outfile * @throws Exception Exception */ public static void main(String[] args) throws Exception { Preconditions.checkArgument(args.length >= 2); String configfile = args[0]; String outfile = args[1]; Config reference = ConfigFactory.load(); File confFile = new File(configfile); assert (confFile.exists()); Config conf = ConfigFactory.parseFileAnySyntax(confFile, ConfigParseOptions.defaults().setAllowMissing(false)); Config typesafe = conf.withFallback(reference).resolve(); StreamsConfiguration streamsConfiguration = StreamsConfigurator.detectConfiguration(typesafe); FacebookConfiguration config = new ComponentConfigurator<>(FacebookConfiguration.class).detectConfiguration(typesafe, "facebook"); FacebookPageFeedProvider provider = new FacebookPageFeedProvider(config); PrintStream outStream = new PrintStream(new BufferedOutputStream(new FileOutputStream(outfile))); provider.prepare(config); provider.startStream(); do { Uninterruptibles.sleepUninterruptibly(streamsConfiguration.getBatchFrequencyMs(), TimeUnit.MILLISECONDS); for (StreamsDatum datum : provider.readCurrent()) { String json; try { json = MAPPER.writeValueAsString(datum.getDocument()); outStream.println(json); } catch (JsonProcessingException ex) { System.err.println(ex.getMessage()); } } } while ( provider.isRunning()); provider.cleanUp(); outStream.flush(); } }