com.squareup.tape.sample.ImageUploadTaskQueue Maven / Gradle / Ivy

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// Copyright 2012 Square, Inc.
package com.squareup.tape.sample;

import android.content.Context;
import android.content.Intent;
import com.google.gson.Gson;
import com.squareup.otto.Bus;
import com.squareup.otto.Produce;
import com.squareup.tape.FileObjectQueue;
import com.squareup.tape.FileObjectQueue.Converter;
import com.squareup.tape.ObjectQueue;
import com.squareup.tape.TaskQueue;

import java.io.File;
import java.io.IOException;

public class ImageUploadTaskQueue extends TaskQueue {
  private static final String FILENAME = "image_upload_task_queue";

  private final Context context;
  private final Bus bus;

  private ImageUploadTaskQueue(ObjectQueue delegate, Context context, Bus bus) {
    super(delegate);
    this.context = context;
    this.bus = bus;
    bus.register(this);

    if (size() > 0) {
      startService();
    }
  }

  private void startService() {
    context.startService(new Intent(context, ImageUploadTaskService.class));
  }

  @Override public void add(ImageUploadTask entry) {
    super.add(entry);
    bus.post(produceSizeChanged());
    startService();
  }

  @Override public void remove() {
    super.remove();
    bus.post(produceSizeChanged());
  }

  @SuppressWarnings("UnusedDeclaration") // Used by event bus.
  @Produce public ImageUploadQueueSizeEvent produceSizeChanged() {
    return new ImageUploadQueueSizeEvent(size());
  }

  public static ImageUploadTaskQueue create(Context context, Gson gson, Bus bus) {
    Converter converter = new GsonConverter(gson, ImageUploadTask.class);
    File queueFile = new File(context.getFilesDir(), FILENAME);
    FileObjectQueue delegate;
    try {
      delegate = new FileObjectQueue(queueFile, converter);
    } catch (IOException e) {
      throw new RuntimeException("Unable to create file queue.", e);
    }
    return new ImageUploadTaskQueue(delegate, context, bus);
  }
}