public static Result start() {
java.util.Map<String, String[]> map = request().body().asFormUrlEncoded();
List<String> terms = new ArrayList<>(map.size());
for (int i = 0; i < map.size(); i++) {
String key = "terms[" + i + "]";
if (map.containsKey(key)) {
String[] values = map.get(key);
if ((values != null) && (values.length >= 1)) {
terms.add(values[0]);
}
}
}
StreamConfig config = getConfig();
config.putTerms(terms);
config.update();
StringBuilder sb = new StringBuilder();
for (String t : terms) {
sb.append(t);
sb.append(", ");
}
sb.delete(sb.length() - 2, sb.length());
try {
startStream(terms);
flash("success", "Twitter stream started (" + sb.toString() + ")");
} catch (TwitterException e) {
Logger.info("Error starting twitter stream", e);
flash("error", "Error starting Twitter stream" + e.getMessage());
}
return redirect(routes.Streams.listAll());
}
public TweetListener(List<String> terms, Client esClient, String esIndex, String esType) {
this.terms = terms;
this.esClient = esClient;
StringBuilder query = new StringBuilder();
for (int i = 0; i < terms.size(); i++) {
if (i > 0) query.append("|");
// query.append("(").append(Pattern.quote(terms.get(i))).append(")");
// query.append("(").append(terms.get(i)).append(")");
query.append(terms.get(i));
}
Logger.info("Query match pattern: " + query.toString());
this.matchPattern = Pattern.compile(query.toString(), Pattern.CASE_INSENSITIVE);
Logger.info("Query match pattern: " + matchPattern.toString());
}
private static void startStream(List<String> terms) throws TwitterException {
if (twitter != null) {
twitter.cleanUp();
}
if (esClient != null) {
esClient.close();
esClient = null;
}
play.Configuration pconf = Play.application().configuration();
String elasticSearchCluster = pconf.getString("tweet.elasticsearch.cluster.name");
if (elasticSearchCluster != null) {
Logger.info("Configuring ElasticSearch...");
Settings settings =
ImmutableSettings.settingsBuilder().put("cluster.name", elasticSearchCluster).build();
esClient =
new TransportClient(settings)
.addTransportAddress(
new InetSocketTransportAddress(
pconf.getString("tweet.elasticsearch.transport.host"),
pconf.getInt("tweet.elasticsearch.transport.port")));
} else {
esClient = null;
}
twitter4j.conf.Configuration tconf = Application.getTwitterConfiguration();
TwitterStreamFactory tf = new TwitterStreamFactory(tconf);
twitter = tf.getInstance();
StatusListener l =
new TweetListener(
terms,
esClient,
pconf.getString("tweet.elasticsearch.index"),
pconf.getString("tweet.elasticsearch.type"));
twitter.addListener(l);
String[] tracks = new String[terms.size()];
StringBuffer termsString = new StringBuffer();
for (int i = 0; i < terms.size(); i++) {
tracks[i] = terms.get(i);
if (i != 0) termsString.append(",");
termsString.append(terms.get(i));
}
FilterQuery q = new FilterQuery().track(tracks);
twitter.filter(q);
Logger.info("Starting listening for tweets using terms " + termsString.toString() + "...");
}
private static StreamConfig getConfig() {
List<StreamConfig> configs = StreamConfig.find.findList();
if (configs.size() > 1) {
Logger.error("Multiple stream configurations present!");
}
StreamConfig config;
if (configs.isEmpty()) {
String[] tracks = new String[3];
tracks[0] = "nl-alert";
tracks[1] = "nlalert";
tracks[2] = "\"nl alert\"";
config = new StreamConfig(tracks);
config.save();
} else {
config = configs.get(0);
}
return config;
}