NonBlockingAsyncViewResource.java

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package com.sun.jersey.client.non.blocking;

import com.ning.http.client.ListenableFuture;
import com.ning.http.client.Request;
import com.ning.http.client.Response;
import com.sun.jersey.api.client.AsyncViewResource;
import com.sun.jersey.api.client.ClientHandler;
import com.sun.jersey.api.client.ClientRequest;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.async.FutureListener;
import com.sun.jersey.api.client.filter.ClientFilter;

import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.UriBuilder;
import java.io.IOException;
import java.net.URI;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * {@inheritDoc}
 *
 * @author pavel.bucek@oracle.com
 */
public class NonBlockingAsyncViewResource extends AsyncViewResource {
    private final NonBlockingClient client;

    protected NonBlockingAsyncViewResource(NonBlockingClient c, URI u) {
        super(c, u);

        this.client = c;
    }

    protected NonBlockingAsyncViewResource(NonBlockingAsyncViewResource that, UriBuilder ub) {
        super(that, ub);

        this.client = that.client;
    }

    /**
     * Unsupported.
     * <p />
     * Any invocation will result in {@link UnsupportedOperationException}. See
     * {@link com.sun.jersey.client.non.blocking.config.NonBlockingClientConfig#PROPERTY_REQUEST_FILTERS} and
     * {@link com.sun.jersey.client.non.blocking.config.NonBlockingClientConfig#PROPERTY_RESPONSE_FILTERS} for
     * alternative to ClientFilter.
     *
     * @param f the filter to add.
     */
    @Override
    public void addFilter(ClientFilter f) {
        throw new UnsupportedOperationException();
    }

    /**
     * Unsupported.
     * <p />
     * Any invocation will result in {@link UnsupportedOperationException}. See
     * {@link com.sun.jersey.client.non.blocking.config.NonBlockingClientConfig#PROPERTY_REQUEST_FILTERS} and
     * {@link com.sun.jersey.client.non.blocking.config.NonBlockingClientConfig#PROPERTY_RESPONSE_FILTERS} for
     * alternative to ClientFilter.

     * @param f the filter to remove.
     */
    @Override
    public void removeFilter(ClientFilter f) {
        throw new UnsupportedOperationException();
    }

    /**
     * Unsupported.
     * <p />
     * Any invocation will result in {@link UnsupportedOperationException}. See
     * {@link com.sun.jersey.client.non.blocking.config.NonBlockingClientConfig#PROPERTY_REQUEST_FILTERS} and
     * {@link com.sun.jersey.client.non.blocking.config.NonBlockingClientConfig#PROPERTY_RESPONSE_FILTERS} for
     * alternative to ClientFilter.
     *
     * @param f the filter to remove.
     * @return
     */
    @Override
    public boolean isFilterPreset(ClientFilter f) {
        throw new UnsupportedOperationException();
    }

    /**
     * Unsupported.
     * <p />
     * Any invocation will result in {@link UnsupportedOperationException}. See
     * {@link com.sun.jersey.client.non.blocking.config.NonBlockingClientConfig#PROPERTY_REQUEST_FILTERS} and
     * {@link com.sun.jersey.client.non.blocking.config.NonBlockingClientConfig#PROPERTY_RESPONSE_FILTERS} for
     * alternative to ClientFilter.
     */
    @Override
    public void removeAllFilters() {
        throw new UnsupportedOperationException();
    }

    /**
     * Unsupported.
     * <p />
     * Any invocation will result in {@link UnsupportedOperationException}. See
     * {@link com.sun.jersey.client.non.blocking.config.NonBlockingClientConfig#PROPERTY_REQUEST_FILTERS} and
     * {@link com.sun.jersey.client.non.blocking.config.NonBlockingClientConfig#PROPERTY_RESPONSE_FILTERS} for
     * alternative to ClientFilter.

     * @return nothing
     */
    @Override
    public ClientHandler getHeadHandler() {
        throw new UnsupportedOperationException();
    }

    @Override
    public AsyncViewResource queryParams(MultivaluedMap<String, String> params) {
        UriBuilder b = getUriBuilder();
        for (Map.Entry<String, List<String>> e : params.entrySet()) {
            for (String value : e.getValue())
                b.queryParam(e.getKey(), value);
        }
        return new NonBlockingAsyncViewResource(this, b);
    }

    @Override
    public AsyncViewResource queryParam(String key, String value) {
        UriBuilder b = getUriBuilder();
        b.queryParam(key, value);
        return new NonBlockingAsyncViewResource(this, b);
    }

    @Override
    public AsyncViewResource uri(URI uri) {
        UriBuilder b = getUriBuilder();
        String path = uri.getRawPath();
        if (path != null && path.length() > 0) {
            if (path.startsWith("/")) {
                b.replacePath(path);
            } else {
                b.path(path);
            }
        }
        String query = uri.getRawQuery();
        if (query != null && query.length() > 0) {
            b.replaceQuery(query);
        }
        return new NonBlockingAsyncViewResource(this, b);
    }

    @Override
    public AsyncViewResource path(String path) {
        return new NonBlockingAsyncViewResource(this, getUriBuilder().path(path));
    }

    @Override
    public Future<ClientResponse> handle(ClientRequest request, final FutureListener<ClientResponse> l) {
        Request r = client.getRequest(request);

        try {
            final ListenableFuture<Response> listenableFuture = this.client.getClientHandlerNing().getHttpClient().executeRequest(r);
            final Future<ClientResponse> jerseyFuture = new Future<ClientResponse>() {
                @Override
                public boolean cancel(boolean b) {
                    return listenableFuture.cancel(b);
                }

                @Override
                public boolean isCancelled() {
                    return listenableFuture.isCancelled();
                }

                @Override
                public boolean isDone() {
                    return listenableFuture.isDone();
                }

                @Override
                public ClientResponse get() throws InterruptedException, ExecutionException {
                    final Response response = listenableFuture.get();
                    if(response != null)
                        return client.getClientResponse(response);
                    else
                        return null;
                }

                @Override
                public ClientResponse get(long l, TimeUnit timeUnit) throws InterruptedException, ExecutionException, TimeoutException {
                    final Response response = listenableFuture.get(l, timeUnit);
                    if(response != null)
                        return client.getClientResponse(response);
                    else return null;
                }
            };

            listenableFuture.addListener(
                    new Runnable() {
                        @Override
                        public void run() {
                            try {
                                l.onComplete(jerseyFuture);
                            } catch (InterruptedException e) {
                                e.printStackTrace();
                            }
                        }
                    },
                    new Executor() {
                        @Override
                        public void execute(Runnable runnable) {
                            runnable.run();
                        }
                    });

            return jerseyFuture;

        } catch (IOException e) {
            e.printStackTrace();
        }

        return null; // TODO
    }

}