io.github.autsia.crowly.services.sentiment.impl.CrowlySentimentAnalyzer.java Source code

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Here is the source code for io.github.autsia.crowly.services.sentiment.impl.CrowlySentimentAnalyzer.java

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/*
 * Copyright 2014 Dmytro Titov
 *
 * 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 io.github.autsia.crowly.services.sentiment.impl;

import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.JsonNode;
import com.mashape.unirest.http.Unirest;
import com.mashape.unirest.http.exceptions.UnirestException;
import io.github.autsia.crowly.services.sentiment.Sentiment;
import io.github.autsia.crowly.services.sentiment.SentimentAnalyzer;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.apache.commons.lang3.tuple.Pair;
import org.apache.log4j.Logger;
import org.json.JSONException;
import org.json.JSONObject;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;

/**
 * Created by Dmytro on 06.12.13 at 1:20
 * Project: crowly
 */
@Service
public class CrowlySentimentAnalyzer implements SentimentAnalyzer {

    public static final String URL = "http://sentiment.vivekn.com/api/text/";
    public static final String RESULT = "result";
    public static final String SENTIMENT = "sentiment";
    public static final String CONFIDENCE = "confidence";
    private static final Logger logger = Logger.getLogger(CrowlySentimentAnalyzer.class);
    @Value("500")
    private long connectionTimeout;

    @Value("500")
    private long socketTimeout;

    @PostConstruct
    public void init() {
        Unirest.setTimeouts(connectionTimeout, socketTimeout);
    }

    @Override
    public Pair<Sentiment, Float> analyze(String text) {
        try {
            HttpResponse<JsonNode> request = Unirest.post(URL).field("txt", text).asJson();
            JSONObject result = request.getBody().getObject().getJSONObject(RESULT);
            String sentiment = result.getString(SENTIMENT);
            Float confidence = Float.parseFloat(result.getString(CONFIDENCE));
            return new ImmutablePair<>(Sentiment.get(sentiment), confidence);
        } catch (Exception e) {
            logger.error(e.getMessage(), e);
            return new ImmutablePair<>(Sentiment.NEUTRAL, 0.5f);
        }
    }

}