TwitterSearchView.java

/*
 * Copyright 2009 Prime Technology.
 *
 * 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 org.primefaces.examples.view;

import com.ning.http.client.AsyncCompletionHandler;
import com.ning.http.client.AsyncHttpClient;
import com.ning.http.client.Response;
import java.util.concurrent.Callable;
import java.util.concurrent.TimeUnit;
import org.primefaces.push.PushContext;
import org.primefaces.push.PushContextFactory;

public class TwitterSearchView {
        
    private boolean active;
    
    private final AsyncHttpClient asyncClient = new AsyncHttpClient();
        
    public boolean isActive() {
        return active;
    }

    public void setActive(boolean active) {
        this.active = active;
    }
    
    public void start() {
        if(!active) {
            
            PushContext context = PushContextFactory.getDefault().getPushContext();
            
            context.schedule("/twitter", new Callable<String>() {

                private String results;
                
                public String call() throws Exception {

                    asyncClient.prepareGet("http://search.twitter.com/search.json?q=I").execute(
                            
                            new AsyncCompletionHandler<Object>() {

                                @Override
                                public Object onCompleted(Response response) throws Exception {
                                    String s = response.getResponseBody();
             
                                    if(response.getStatusCode() != 200) {                                        
                                        return null;
                                    }
                                    
                                    StringBuilder jsonBuilder = new StringBuilder();
                                    jsonBuilder.append("{\"data\":").append(s).append("}");
                                    
                                    results = jsonBuilder.toString();
                                                                        
                                    return results;
                                }

                                
                            }).get();
                    
                    return results;
                }

            }, 10, TimeUnit.SECONDS);
            
            active = true;
        } 
    }
}