com.wso2.stream.connector.protocol.TwitterProcessor.java Source code

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Here is the source code for com.wso2.stream.connector.protocol.TwitterProcessor.java

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/*
*  Copyright (c) 2014, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
*  WSO2 Inc. licenses this file to you 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 com.wso2.stream.connector.protocol;

import java.util.Properties;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.core.SynapseEnvironment;
import org.apache.synapse.inbound.PollingProcessor;
import org.apache.synapse.startup.quartz.StartUpController;
import org.apache.synapse.task.Task;
import org.apache.synapse.task.TaskDescription;
import org.apache.synapse.task.TaskStartupObserver;

public class TwitterProcessor implements PollingProcessor, TaskStartupObserver {

    private static final Log log = LogFactory.getLog(TwitterProcessor.class.getName());

    private TwitterPollingConsumer pollingConsumer;
    private String name;
    private Properties twitterProperties;
    private long interval;
    private String injectingSeq;
    private String onErrorSeq;
    private SynapseEnvironment synapseEnvironment;
    private StartUpController startUpController;

    public TwitterProcessor(String name, Properties twitterProperties, long pollInterval, String injectingSeq,
            String onErrorSeq, SynapseEnvironment synapseEnvironment) {
        this.name = name;
        this.twitterProperties = twitterProperties;
        this.interval = pollInterval;
        this.injectingSeq = injectingSeq;
        this.onErrorSeq = onErrorSeq;
        this.synapseEnvironment = synapseEnvironment;
    }

    /* (non-Javadoc)
     * @see org.apache.synapse.task.TaskStartupObserver#update()
     */
    public void update() {
        start();
    }

    /* (non-Javadoc)
     * @see org.apache.synapse.inbound.PollingProcessor#init()
     */
    public void init() {
        log.info("Initializing inbound Twitter listener for destination " + name);
        pollingConsumer = new TwitterPollingConsumer(twitterProperties);
        pollingConsumer.registerHandler(new TwitterInjectHandler(injectingSeq, onErrorSeq, synapseEnvironment));
        start();
    }

    /* (non-Javadoc)
     * @see org.apache.synapse.inbound.PollingProcessor#start()
     */
    public void start() {
        log.info("Inbound Twitter listener Started for destination " + name);
        try {
            Task task = new TwitterTask(pollingConsumer);
            TaskDescription taskDescription = new TaskDescription();
            taskDescription.setName(name + "-TWITTER-EP");
            taskDescription.setTaskGroup("TWITTER-EP");
            taskDescription.setInterval(interval);
            taskDescription.setIntervalInMs(true);
            taskDescription.addResource(TaskDescription.INSTANCE, task);
            taskDescription.addResource(TaskDescription.CLASSNAME, task.getClass().getName());
            startUpController = new StartUpController();
            startUpController.setTaskDescription(taskDescription);
            startUpController.init(synapseEnvironment);

        } catch (Exception e) {
            log.error("Could not start Twitter Processor. Error starting up scheduler. Error: "
                    + e.getLocalizedMessage());
        }
    }

    /* (non-Javadoc)
     * @see org.apache.synapse.inbound.PollingProcessor#destroy()
     */
    public void destroy() {
        log.info("Inbound Twitter listener ending operation on destination " + name);
        startUpController.destroy();
    }
}