DatabaseCallManager.java

package com.example.database;

import android.os.AsyncTask;
import android.os.Build;

import com.example.database.query.Query;

import org.alfonz.utility.Logcat;

import java.util.LinkedList;
import java.util.List;


public class DatabaseCallManager
{
	private List<DatabaseCallTask> mTaskList = new LinkedList<>();


	public DatabaseCallManager()
	{
	}


	public void executeTask(Query query, DatabaseCallListener listener)
	{
		DatabaseCallTask task = new DatabaseCallTask(query, listener);
		mTaskList.add(task);

		if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
		{
			// use AsyncTask.THREAD_POOL_EXECUTOR or AsyncTask.SERIAL_EXECUTOR
			task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
		}
		else
		{
			task.execute();
		}
	}


	public boolean finishTask(DatabaseCallTask task)
	{
		return mTaskList.remove(task);
	}


	public int getTasksCount()
	{
		return mTaskList.size();
	}


	public boolean hasRunningTask(Class<?> queryClass)
	{
		String className = queryClass.getSimpleName();

		for(DatabaseCallTask task : mTaskList)
		{
			String taskName = task.getQuery().getClass().getSimpleName();
			if(className.equals(taskName)) return true;
		}

		return false;
	}


	public void cancelAllTasks()
	{
		for(int i = mTaskList.size() - 1; i >= 0; i--)
		{
			DatabaseCallTask task = mTaskList.get(i);
			if(task != null)
			{
				task.cancel(true);
				mTaskList.remove(task);
			}
		}
	}


	public void printRunningTasks()
	{
		for(DatabaseCallTask task : mTaskList)
		{
			Logcat.d(task == null ? "null" : (task.getQuery().getClass().getSimpleName() + " " + task.getStatus().toString()));
		}

		if(mTaskList.isEmpty()) Logcat.d("empty");
	}
}