| // 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.gerrit.sshd.AdminCommand; |
| |
| import net.sf.ehcache.Ehcache; |
| |
| import org.apache.sshd.server.Environment; |
| import org.kohsuke.args4j.Option; |
| |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.SortedSet; |
| |
| /** Causes the caches to purge all entries and reload. */ |
| @AdminCommand |
| final class AdminFlushCaches extends CacheCommand { |
| @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; |
| |
| private PrintWriter p; |
| |
| @Override |
| public void start(final Environment env) { |
| startThread(new CommandRunnable() { |
| @Override |
| public void run() throws Exception { |
| parseCommandLine(); |
| flush(); |
| } |
| }); |
| } |
| |
| private void flush() throws Failure { |
| p = toPrintWriter(err); |
| 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()) { |
| p.print(name); |
| p.print('\n'); |
| } |
| p.flush(); |
| } |
| |
| private void doBulkFlush() { |
| try { |
| for (final Ehcache c : getAllCaches()) { |
| final String name = c.getName(); |
| if (flush(name)) { |
| try { |
| c.removeAll(); |
| } catch (Throwable e) { |
| p.println("error: cannot flush cache \"" + name + "\": " + e); |
| } |
| } |
| } |
| } finally { |
| p.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; |
| } |
| } |
| } |