org.cyclades.client.message.ConsumingWorker Maven / Gradle / Ivy

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package org.cyclades.client.message;

import java.util.concurrent.Callable;
import org.cyclades.engine.nyxlet.templates.xstroma.target.ConsumerTarget;
import org.json.JSONObject;

public class ConsumingWorker implements Callable {
    
    public ConsumingWorker (String consumerClass, JSONObject consumerJSON, CompletableMessageProcessor mp, long maxWait) {
        this.consumerClass = consumerClass;
        this.consumerJSON = consumerJSON;
        this.cmp = mp;
        this.maxWait = maxWait;
    }
    
    /**
     * Returns true if this job exits due to completion, false if otherwise
     */
    public Boolean call() throws Exception {
        ConsumerTarget ct = null;
        try {
            ct = new ConsumerTarget(consumerClass, consumerJSON, cmp);
            long exitTime = System.currentTimeMillis() + maxWait;
            synchronized (cmp) {
                // Do we need this here as well: !Thread.currentThread().isInterrupted(), may be redundant
                while ((System.currentTimeMillis() < exitTime || maxWait < 0) && !cmp.done()) {
                    if (maxWait < 0) { 
                        cmp.wait(); 
                    } else { 
                        cmp.wait(exitTime - System.currentTimeMillis()); 
                    }
                }
            }  
            return Boolean.valueOf(cmp.done());
        } finally {
            try { ct.destroy(); } catch (Exception e) {}
        }
    }
    
    private final String consumerClass;
    private final JSONObject consumerJSON;
    private final CompletableMessageProcessor cmp;
    private final long maxWait; // Anything less than 0 will wait forever for cmp.done() to be true
    
}