mirror of https://github.com/M66B/FairEmail.git
91 lines
2.7 KiB
Java
91 lines
2.7 KiB
Java
package eu.faircode.email;
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/*
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This file is part of FairEmail.
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FairEmail is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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FairEmail is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FairEmail. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2018-2024 by Marcel Bokhorst (M66B)
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*/
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import java.util.Date;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.ThreadPoolExecutor;
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public class DutyCycle {
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private final String name;
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private final long interval;
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private final long duration;
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private Long last = null;
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private long start;
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private long idle = 0;
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private long busy = 0;
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private static final long YIELD_INTERVAL = 10 * 1000L; // milliseconds
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private static final long YIELD_DURATION = 2000L; // milliseconds
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public DutyCycle(String name) {
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this(name, YIELD_INTERVAL, YIELD_DURATION);
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}
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public DutyCycle(String name, long interval, long duration) {
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this.name = name;
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this.interval = interval;
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this.duration = duration;
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}
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public void start() {
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start = new Date().getTime();
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}
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public void stop(boolean foreground, ExecutorService executor) {
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boolean done = false;
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try {
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done = (executor instanceof ThreadPoolExecutor &&
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((ThreadPoolExecutor) executor).getQueue().size() == 0);
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} catch (Throwable ex) {
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Log.e(ex);
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} finally {
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stop(foreground, done);
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}
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}
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public void stop(boolean foreground, boolean done) {
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long end = new Date().getTime();
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if (last != null)
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idle += (start - last);
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last = end;
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busy += (end - start);
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if (busy + idle > interval) {
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long wait = (duration - idle);
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Log.i(name + " busy=" + busy + " idle=" + idle +
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" wait=" + wait + " foreground=" + foreground + " done=" + done);
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if (wait > 0 && foreground && !done) {
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try {
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Thread.sleep(wait);
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} catch (InterruptedException ex) {
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Log.w(ex);
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}
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last += wait;
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}
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idle = 0;
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busy = 0;
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}
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}
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}
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