64 lines
1.6 KiB
Java
64 lines
1.6 KiB
Java
package eu.siacs.conversations.utils;
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import android.util.Log;
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import java.util.ArrayDeque;
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import java.util.concurrent.Executor;
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import java.util.concurrent.Executors;
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import eu.siacs.conversations.Config;
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public class SerialSingleThreadExecutor implements Executor {
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final ArrayDeque<Runnable> tasks = new ArrayDeque<>();
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private final Executor executor = Executors.newSingleThreadExecutor();
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private final String name;
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protected Runnable active;
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public SerialSingleThreadExecutor(String name) {
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this.name = name;
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}
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public synchronized void execute(final Runnable r) {
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tasks.offer(new Runner(r));
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if (active == null) {
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scheduleNext();
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}
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}
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private synchronized void scheduleNext() {
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if ((active = tasks.poll()) != null) {
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executor.execute(active);
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int remaining = tasks.size();
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if (remaining > 0) {
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Log.d(Config.LOGTAG, remaining + " remaining tasks on executor '" + name + "'");
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}
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}
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}
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private class Runner implements Runnable, Cancellable {
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private final Runnable runnable;
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private Runner(Runnable runnable) {
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this.runnable = runnable;
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}
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@Override
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public void cancel() {
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if (runnable instanceof Cancellable) {
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((Cancellable) runnable).cancel();
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}
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}
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@Override
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public void run() {
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try {
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runnable.run();
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} finally {
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scheduleNext();
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}
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}
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}
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} |