Android Open Source - FeedListViewDemo Request Future






From Project

Back to project page FeedListViewDemo.

License

The source code is released under:

MIT License

If you think the Android project FeedListViewDemo listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

/*
 * Copyright (C) 2011 The Android Open Source Project
 */*from w w  w.  java  2  s .c o  m*/
 * 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 com.android.volley.toolbox;

import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;

import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * A Future that represents a Volley request.
 *
 * Used by providing as your response and error listeners. For example:
 * <pre>
 * RequestFuture&lt;JSONObject&gt; future = RequestFuture.newFuture();
 * MyRequest request = new MyRequest(URL, future, future);
 *
 * // If you want to be able to cancel the request:
 * future.setRequest(requestQueue.add(request));
 *
 * // Otherwise:
 * requestQueue.add(request);
 *
 * try {
 *   JSONObject response = future.get();
 *   // do something with response
 * } catch (InterruptedException e) {
 *   // handle the error
 * } catch (ExecutionException e) {
 *   // handle the error
 * }
 * </pre>
 *
 * @param <T> The type of parsed response this future expects.
 */
public class RequestFuture<T> implements Future<T>, Response.Listener<T>,
       Response.ErrorListener {
    private Request<?> mRequest;
    private boolean mResultReceived = false;
    private T mResult;
    private VolleyError mException;

    public static <E> RequestFuture<E> newFuture() {
        return new RequestFuture<E>();
    }

    private RequestFuture() {}

    public void setRequest(Request<?> request) {
        mRequest = request;
    }

    @Override
    public synchronized boolean cancel(boolean mayInterruptIfRunning) {
        if (mRequest == null) {
            return false;
        }

        if (!isDone()) {
            mRequest.cancel();
            return true;
        } else {
            return false;
        }
    }

    @Override
    public T get() throws InterruptedException, ExecutionException {
        try {
            return doGet(null);
        } catch (TimeoutException e) {
            throw new AssertionError(e);
        }
    }

    @Override
    public T get(long timeout, TimeUnit unit)
            throws InterruptedException, ExecutionException, TimeoutException {
        return doGet(TimeUnit.MILLISECONDS.convert(timeout, unit));
    }

    private synchronized T doGet(Long timeoutMs)
            throws InterruptedException, ExecutionException, TimeoutException {
        if (mException != null) {
            throw new ExecutionException(mException);
        }

        if (mResultReceived) {
            return mResult;
        }

        if (timeoutMs == null) {
            wait(0);
        } else if (timeoutMs > 0) {
            wait(timeoutMs);
        }

        if (mException != null) {
            throw new ExecutionException(mException);
        }

        if (!mResultReceived) {
            throw new TimeoutException();
        }

        return mResult;
    }

    @Override
    public boolean isCancelled() {
        if (mRequest == null) {
            return false;
        }
        return mRequest.isCanceled();
    }

    @Override
    public synchronized boolean isDone() {
        return mResultReceived || mException != null || isCancelled();
    }

    @Override
    public synchronized void onResponse(T response) {
        mResultReceived = true;
        mResult = response;
        notifyAll();
    }

    @Override
    public synchronized void onErrorResponse(VolleyError error) {
        mException = error;
        notifyAll();
    }
}




Java Source Code List

com.android.volley.AuthFailureError.java
com.android.volley.CacheDispatcher.java
com.android.volley.Cache.java
com.android.volley.DefaultRetryPolicy.java
com.android.volley.ExecutorDelivery.java
com.android.volley.NetworkDispatcher.java
com.android.volley.NetworkError.java
com.android.volley.NetworkResponse.java
com.android.volley.Network.java
com.android.volley.NoConnectionError.java
com.android.volley.ParseError.java
com.android.volley.RequestQueue.java
com.android.volley.Request.java
com.android.volley.ResponseDelivery.java
com.android.volley.Response.java
com.android.volley.RetryPolicy.java
com.android.volley.ServerError.java
com.android.volley.TimeoutError.java
com.android.volley.VolleyError.java
com.android.volley.VolleyLog.java
com.android.volley.toolbox.AndroidAuthenticator.java
com.android.volley.toolbox.Authenticator.java
com.android.volley.toolbox.BasicNetwork.java
com.android.volley.toolbox.ByteArrayPool.java
com.android.volley.toolbox.ClearCacheRequest.java
com.android.volley.toolbox.DiskBasedCache.java
com.android.volley.toolbox.HttpClientStack.java
com.android.volley.toolbox.HttpHeaderParser.java
com.android.volley.toolbox.HttpStack.java
com.android.volley.toolbox.HurlStack.java
com.android.volley.toolbox.ImageLoader.java
com.android.volley.toolbox.ImageRequest.java
com.android.volley.toolbox.JsonArrayRequest.java
com.android.volley.toolbox.JsonObjectRequest.java
com.android.volley.toolbox.JsonRequest.java
com.android.volley.toolbox.NetworkImageView.java
com.android.volley.toolbox.NoCache.java
com.android.volley.toolbox.PoolingByteArrayOutputStream.java
com.android.volley.toolbox.RequestFuture.java
com.android.volley.toolbox.StringRequest.java
com.android.volley.toolbox.Volley.java
io.bxbxbai.androiddemos.AppController.java
io.bxbxbai.androiddemos.ApplicationTest.java
io.bxbxbai.androiddemos.MainActivity.java
io.bxbxbai.androiddemos.activity.BaseActivity.java
io.bxbxbai.androiddemos.activity.FeedListActivity.java
io.bxbxbai.androiddemos.adapter.FeedListAdapter.java
io.bxbxbai.androiddemos.adapter.SimpleBaseAdapter.java
io.bxbxbai.androiddemos.data.FeedItem.java
io.bxbxbai.androiddemos.data.FeedResult.java
io.bxbxbai.androiddemos.utils.BitmapUtils.java
io.bxbxbai.androiddemos.utils.GsonRequest.java
io.bxbxbai.androiddemos.utils.ListViewUtils.java
io.bxbxbai.androiddemos.utils.LruBitmapCache.java
io.bxbxbai.androiddemos.utils.RequestManager.java
io.bxbxbai.androiddemos.utils.TaskUtils.java
io.bxbxbai.androiddemos.utils.ToastUtils.java
io.bxbxbai.androiddemos.utils.VersionUtils.java
io.bxbxbai.androiddemos.utils.ViewFinder.java
io.bxbxbai.androiddemos.view.FeedImageView.java