com.google.gerrit.server.plugins.PluginCleanerTask Maven / Gradle / Ivy
// Copyright (C) 2012 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.plugins;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.server.git.WorkQueue;
import com.google.gerrit.server.util.time.TimeUtil;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
@Singleton
class PluginCleanerTask implements Runnable {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private final WorkQueue workQueue;
private final PluginLoader loader;
private volatile int pending;
private Future self;
private int attempts;
private long start;
@Inject
PluginCleanerTask(WorkQueue workQueue, PluginLoader loader) {
this.workQueue = workQueue;
this.loader = loader;
}
@Override
public void run() {
int left = loader.processPendingCleanups();
synchronized (this) {
pending = left;
self = null;
if (0 < left) {
long waiting = TimeUtil.nowMs() - start;
logger.atWarning().log(
"%d plugins still waiting to be reclaimed after %d minutes",
pending, TimeUnit.MILLISECONDS.toMinutes(waiting));
attempts = Math.min(attempts + 1, 15);
ensureScheduled();
} else {
attempts = 0;
}
}
}
@Override
public String toString() {
int p = pending;
if (0 < p) {
return String.format("Plugin Cleaner (waiting for %d plugins)", p);
}
return "Plugin Cleaner";
}
synchronized void clean(int expect) {
if (self == null && pending == 0) {
start = TimeUtil.nowMs();
}
pending = expect;
ensureScheduled();
}
private void ensureScheduled() {
if (self == null && 0 < pending) {
if (attempts == 1) {
self = workQueue.getDefaultQueue().schedule(this, 30, TimeUnit.SECONDS);
} else {
self = workQueue.getDefaultQueue().schedule(this, attempts + 1, TimeUnit.MINUTES);
}
}
}
}