| // Copyright (C) 2008 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.sshd.commands; |
| |
| import com.google.common.cache.Cache; |
| import com.google.gerrit.common.data.GlobalCapability; |
| import com.google.gerrit.extensions.annotations.RequiresCapability; |
| import com.google.gerrit.server.IdentifiedUser; |
| import com.google.gerrit.sshd.BaseCommand; |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| |
| import org.kohsuke.args4j.Option; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.SortedSet; |
| |
| /** Causes the caches to purge all entries and reload. */ |
| @RequiresCapability(GlobalCapability.FLUSH_CACHES) |
| final class FlushCaches extends CacheCommand { |
| private static final String WEB_SESSIONS = "web_sessions"; |
| |
| @Option(name = "--cache", usage = "flush named cache", metaVar = "NAME") |
| private List<String> caches = new ArrayList<String>(); |
| |
| @Option(name = "--all", usage = "flush all caches") |
| private boolean all; |
| |
| @Option(name = "--list", usage = "list available caches") |
| private boolean list; |
| |
| @Inject |
| IdentifiedUser currentUser; |
| |
| @Override |
| protected void run() throws Failure { |
| if (caches.contains(WEB_SESSIONS) |
| && !currentUser.getCapabilities().canAdministrateServer()) { |
| String msg = String.format( |
| "fatal: only site administrators can flush %s", |
| WEB_SESSIONS); |
| throw new UnloggedFailure(BaseCommand.STATUS_NOT_ADMIN, msg); |
| } |
| |
| if (list) { |
| if (all || caches.size() > 0) { |
| throw error("error: cannot use --list with --all or --cache"); |
| } |
| doList(); |
| return; |
| } |
| |
| if (all && caches.size() > 0) { |
| throw error("error: cannot combine --all and --cache"); |
| } else if (!all && caches.size() == 1 && caches.contains("all")) { |
| caches.clear(); |
| all = true; |
| } else if (!all && caches.isEmpty()) { |
| all = true; |
| } |
| |
| final SortedSet<String> names = cacheNames(); |
| for (final String n : caches) { |
| if (!names.contains(n)) { |
| throw error("error: cache \"" + n + "\" not recognized"); |
| } |
| } |
| doBulkFlush(); |
| } |
| |
| private static UnloggedFailure error(final String msg) { |
| return new UnloggedFailure(1, msg); |
| } |
| |
| private void doList() { |
| for (final String name : cacheNames()) { |
| stderr.print(name); |
| stderr.print('\n'); |
| } |
| stderr.flush(); |
| } |
| |
| private void doBulkFlush() { |
| try { |
| for (String plugin : cacheMap.plugins()) { |
| for (Map.Entry<String, Provider<Cache<?, ?>>> entry : |
| cacheMap.byPlugin(plugin).entrySet()) { |
| String n = cacheNameOf(plugin, entry.getKey()); |
| if (flush(n)) { |
| try { |
| entry.getValue().get().invalidateAll(); |
| } catch (Throwable err) { |
| stderr.println("error: cannot flush cache \"" + n + "\": " + err); |
| } |
| } |
| } |
| } |
| } finally { |
| stderr.flush(); |
| } |
| } |
| |
| private boolean flush(final String cacheName) { |
| if (caches.contains(cacheName)) { |
| return true; |
| |
| } else if (all) { |
| if (WEB_SESSIONS.equals(cacheName)) { |
| return false; |
| } |
| return true; |
| |
| } else { |
| return false; |
| } |
| } |
| } |