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package org.glassfish.jersey.examples.aggregator;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.GenericType;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.glassfish.jersey.client.ChunkedInput;
import org.glassfish.jersey.client.ClientProperties;
import org.glassfish.jersey.SslConfigurator;
import org.glassfish.jersey.client.filter.HttpBasicAuthFilter;
import org.glassfish.jersey.message.GZipEncoder;
import org.glassfish.jersey.moxy.json.MoxyJsonFeature;
/**
* Twitter message-based data aggregator implementation.
*
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public final class TwitterAggregator implements DataAggregator {
private static final Logger LOGGER = Logger.getLogger(TwitterAggregator.class.getName());
private volatile boolean cancelled;
private final String rgbColor;
/**
* Create new twitter message aggregator with a specific message color.
*
* @param rgbColor message color.
*/
public TwitterAggregator(String rgbColor) {
this.rgbColor = rgbColor;
}
@Override
public void start(final String keywords, final DataListener msgListener) {
cancelled = false;
// System.setProperty("http.proxyHost", "www-proxy.us.oracle.com");
// System.setProperty("http.proxyPort", "80");
// System.setProperty("https.proxyHost", "www-proxy.us.oracle.com");
// System.setProperty("https.proxyPort", "80");
final LinkedBlockingQueue<Message> messages = new LinkedBlockingQueue<Message>();
final Future<?> readerHandle = Executors.newSingleThreadExecutor().submit(new Runnable() {
@Override
public void run() {
SslConfigurator sslConfig = SslConfigurator.newInstance()
.trustStoreFile("./truststore_client")
.trustStorePassword("asdfgh")
.keyStoreFile("./keystore_client")
.keyPassword("asdfgh");
final Client client = ClientBuilder.newBuilder().sslContext(sslConfig.createSSLContext()).build();
client.property(ClientProperties.CONNECT_TIMEOUT, 2000)
.register(new MoxyJsonFeature())
.register(new HttpBasicAuthFilter(App.getTwitterUserName(), App.getTwitterUserPassword()))
.register(GZipEncoder.class);
final Response response = client.target("https://stream.twitter.com/1.1/statuses/filter.json")
.queryParam("track", keywords)
// .queryParam("locations", "-122.75,36.8,-121.75,37.8") // San Francisco
.request(MediaType.APPLICATION_JSON_TYPE)
.header(HttpHeaders.HOST, "stream.twitter.com")
.header(HttpHeaders.USER_AGENT, "Jersey/2.0")
.header(HttpHeaders.ACCEPT_ENCODING, "gzip")
.get();
if (response.getStatusInfo().getFamily() != Response.Status.Family.SUCCESSFUL) {
LOGGER.log(Level.WARNING, "Error connecting to Twitter Streaming API: " + response.getStatus());
msgListener.onError();
return;
}
msgListener.onStart();
try {
final ChunkedInput<Message> chunks = response.readEntity(new GenericType<ChunkedInput<Message>>() {
});
try {
while (!Thread.interrupted()) {
Message message = chunks.read();
if (message == null) {
break;
}
try {
message.setRgbColor(rgbColor);
System.out.println(message.toString());
messages.put(message);
} catch (InterruptedException e) {
break;
}
}
} finally {
if (chunks != null) {
chunks.close();
}
}
} catch (Throwable t) {
LOGGER.log(Level.WARNING, "Reading from the Twitter stream has failed", t);
messages.offer(null);
msgListener.onError();
}
}
});
Executors.newSingleThreadExecutor().submit(new Runnable() {
@Override
public void run() {
final Client resourceClient = ClientBuilder.newClient();
resourceClient.register(new MoxyJsonFeature());
final WebTarget messageStreamResource = resourceClient.target(App.getApiUri()).path("message/stream");
Message message = null;
try {
while (!cancelled && (message = messages.take()) != null) {
msgListener.onMessage(message);
final Response r = messageStreamResource.request().put(Entity.json(message));
if (r.getStatusInfo().getFamily() != Response.Status.Family.SUCCESSFUL) {
LOGGER.warning("Unexpected PUT message response status code: " + r.getStatus());
}
}
if (message == null) {
LOGGER.info("Timed out while waiting for a message.");
}
} catch (InterruptedException ex) {
LOGGER.log(Level.WARNING, "Waiting for a message has been interrupted.", ex);
} finally {
readerHandle.cancel(true);
msgListener.onComplete();
}
}
});
}
@Override
public void stop() {
cancelled = true;
}
}