execute several asynchronous methods at the same time

Question

I have 3 asynchronous methods:

1 - Update Data
2 - Validate Data
3 - Enter

Currently I have the class as follows:

public void onCreate (Bundle savedInstanceState) {
        super.onCreate (savedInstanceState);
        setContentView (R.layout.activity_sync);
....

new Update (). execute ();
new Validate () .execute ();
new Enter (). execute ();
}

It is assumed that they all have to execute at the same time however they expect to have an answer from the previous one.

How can I make them all run at the same time without waiting for the previous one to finish?

Best way I believe would be [ExecutorService.invokeAll();](https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ExecutorService.html#invokeAll(java.util.Collection)) — Cowboy Farnz, May 15 '18 at 14:49
I use asynchronous classes Example: private class Update extends AsyncTask { ... } — Juan Tobon, May 15 '18 at 15:37

score 0 · Answer 1 · edited May 15 '18 at 19:18

0

You should run each method in a separate thread. Make Update, Validate, Enter implement Runnable. In the run() method call execute() or rename execute() to run(). Then

ExecutorService pool = Executors.newFixedThreadPool(poolSize);;
pool.execute(new Update());
pool.execute(new Validate());
pool.execute(new Enter());

edited May 15 '18 at 19:18

Arthur Attout

2,701
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answered May 15 '18 at 15:01

cecunami

957
5
12

How can I get the ExecutorService.execute? – Juan Tobon May 15 '18 at 15:31
I edited the question. The answer implied that ExecutorService was a static component, while in fact, it isn't. – Arthur Attout May 15 '18 at 15:38

score 0 · Accepted Answer · answered May 16 '18 at 10:56

0

You can use .executeOnExecutor()* instead of .execute() to run multiple AsynchTask at the same time like this:

* Works from API level 11 or onward

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
     new Update().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
     new Validate().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
     new Enter().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}
 else {
     new Update().execute();
     new Validate().execute();
     new Enter().execute();
}

answered May 16 '18 at 10:56

Deven

3,078
1
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Thanks, it worked, It can be done with all asynchronous methods or has some limit? – Juan Tobon May 17 '18 at 15:23
Yes it has some limitations, you can find here https://stackoverflow.com/a/4072832/1427776 – Deven May 18 '18 at 05:34

execute several asynchronous methods at the same time

2 Answers2