/*
* Copyright 2007 Yusuke Yamamoto
*
* 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 twitter4j.examples.stream;
import twitter4j.*;
import java.util.ArrayList;
import java.util.Arrays;
/**
* <p>This is a code example of Twitter4J Streaming API - filter method support.<br>
* Usage: java twitter4j.examples.stream.PrintFilterStream [follow(comma separated numerical user ids)] [track(comma separated filter terms)]<br>
* </p>
*
* @author Yusuke Yamamoto - yusuke at mac.com
*/
public final class PrintFilterStream {
/**
* Main entry of this application.
*
* @param args follow(comma separated user ids) track(comma separated filter terms)
* @throws twitter4j.TwitterException
*/
public static void main(String[] args) throws TwitterException {
if (args.length < 1) {
System.out.println("Usage: java twitter4j.examples.PrintFilterStream [follow(comma separated numerical user ids)] [track(comma separated filter terms)]");
System.exit(-1);
}
StatusListener listener = new StatusListener() {
@Override
public void onStatus(Status status) {
System.out.println("@" + status.getUser().getScreenName() + " - " + status.getText());
}
@Override
public void onDeletionNotice(StatusDeletionNotice statusDeletionNotice) {
System.out.println("Got a status deletion notice id:" + statusDeletionNotice.getStatusId());
}
@Override
public void onTrackLimitationNotice(int numberOfLimitedStatuses) {
System.out.println("Got track limitation notice:" + numberOfLimitedStatuses);
}
@Override
public void onScrubGeo(long userId, long upToStatusId) {
System.out.println("Got scrub_geo event userId:" + userId + " upToStatusId:" + upToStatusId);
}
@Override
public void onStallWarning(StallWarning warning) {
System.out.println("Got stall warning:" + warning);
}
@Override
public void onException(Exception ex) {
ex.printStackTrace();
}
};
TwitterStream twitterStream = new TwitterStreamFactory().getInstance();
twitterStream.addListener(listener);
ArrayList<Long> follow = new ArrayList<Long>();
ArrayList<String> track = new ArrayList<String>();
for (String arg : args) {
if (isNumericalArgument(arg)) {
for (String id : arg.split(",")) {
follow.add(Long.parseLong(id));
}
} else {
track.addAll(Arrays.asList(arg.split(",")));
}
}
long[] followArray = new long[follow.size()];
for (int i = 0; i < follow.size(); i++) {
followArray[i] = follow.get(i);
}
String[] trackArray = track.toArray(new String[track.size()]);
// filter() method internally creates a thread which manipulates TwitterStream and calls these adequate listener methods continuously.
twitterStream.filter(new FilterQuery(0, followArray, trackArray));
}
private static boolean isNumericalArgument(String argument) {
String args[] = argument.split(",");
boolean isNumericalArgument = true;
for (String arg : args) {
try {
Integer.parseInt(arg);
} catch (NumberFormatException nfe) {
isNumericalArgument = false;
break;
}
}
return isNumericalArgument;
}
}