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may be used to endorse or promote products derived from this software
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 */
package org.dcache.resilience;

import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListenableFutureTask;

import java.io.Serializable;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.Executor;

import diskCacheV111.util.CacheException;
import diskCacheV111.vehicles.Message;

import dmg.cells.nucleus.CellEndpoint;
import dmg.cells.nucleus.CellMessage;
import dmg.cells.nucleus.CellMessageAnswerable;
import dmg.cells.nucleus.CellPath;
import dmg.cells.nucleus.SerializationException;

import org.dcache.cells.CellStub;

final class TestStub extends CellStub {
    private TestMessageProcessor processor;
    private TestNotifyProcessor notifyProcessor;

    Callable callable;

    public TestStub() {
        super();
        setCellEndpoint(new CellEndpoint() {
            @Override
            public void sendMessage(CellMessage envelope, SendFlag... flags)
                            throws SerializationException {

            }

            @Override
            public void sendMessage(CellMessage envelope,
                                    CellMessageAnswerable callback, Executor executor,
                                    long timeout, SendFlag... flags) throws SerializationException {

            }

            @Override
            public Map<String, Object> getDomainContext() {
                return null;
            }
        });
    }

    @Override
    public CellPath getDestinationPath() {
        return new CellPath("testCell", "testDomain");
    }

    public <T extends Message> T sendAndWait(T msg, long timeout)
                    throws CacheException, InterruptedException{
        send(msg);
        return msg;
    }

    @Override
    public void notify(Serializable message) {
        if (notifyProcessor != null) {
            notifyProcessor.processMessage(message);
        }
    }

    @Override public <T extends Message> ListenableFuture<T> send(CellPath destination,
                                                                  T message, CellEndpoint.SendFlag... flags) {
        return send(message, flags);
    }

    @Override
    public <T extends Message> ListenableFuture<T> send(final T message, CellEndpoint.SendFlag... flags) {
        ListenableFutureTask<T> future;
        callable = new Callable<T>() {
            @Override
            public T call() throws Exception {
                processor.processMessage(message);
                return message;
            }
        };
        future = ListenableFutureTask.create(callable);
        future.run();
        return future;
    }

    public void setProcessor(TestMessageProcessor processor) {
        this.processor = processor;
    }

    public void setNotifyProcessor(TestNotifyProcessor notifyProcessor) {
        this.notifyProcessor = notifyProcessor;
    }
}