46 lines
1.2 KiB
Java
46 lines
1.2 KiB
Java
package org.session.libsession.utilities;
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import android.os.Handler;
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/**
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* A class that will throttle the number of runnables executed to be at most once every specified
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* interval.
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*
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* Useful for performing actions in response to rapid user input where you want to take action on
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* the initial input but prevent follow-up spam.
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*
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* This is different from {@link Debouncer} in that it will run the first runnable immediately
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* instead of waiting for input to die down.
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*
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* See http://rxmarbles.com/#throttle
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*/
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public class Throttler {
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private static final int WHAT = 8675309;
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private final Handler handler;
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private final long threshold;
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/**
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* @param threshold Only one runnable will be executed via {@link #publish(Runnable)} every
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* {@code threshold} milliseconds.
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*/
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public Throttler(long threshold) {
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this.handler = new Handler();
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this.threshold = threshold;
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}
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public void publish(Runnable runnable) {
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if (handler.hasMessages(WHAT)) {
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return;
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}
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runnable.run();
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handler.sendMessageDelayed(handler.obtainMessage(WHAT), threshold);
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}
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public void clear() {
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handler.removeCallbacksAndMessages(null);
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}
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}
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