opensim – Rev 1
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/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSimulator Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using log4net;
namespace OpenSim.Framework.Monitoring
{
/// <summary>
/// Static class used to register/deregister checks on runtime conditions.
/// </summary>
public static class ChecksManager
{
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
// Subcommand used to list other stats.
public const string ListSubCommand = "list";
// All subcommands
public static HashSet<string> SubCommands = new HashSet<string> { ListSubCommand };
/// <summary>
/// Checks categorized by category/container/shortname
/// </summary>
/// <remarks>
/// Do not add or remove directly from this dictionary.
/// </remarks>
public static SortedDictionary<string, SortedDictionary<string, SortedDictionary<string, Check>>> RegisteredChecks
= new SortedDictionary<string, SortedDictionary<string, SortedDictionary<string, Check>>>();
public static void RegisterConsoleCommands(ICommandConsole console)
{
console.Commands.AddCommand(
"General",
false,
"show checks",
"show checks",
"Show checks configured for this server",
"If no argument is specified then info on all checks will be shown.\n"
+ "'list' argument will show check categories.\n"
+ "THIS FACILITY IS EXPERIMENTAL",
HandleShowchecksCommand);
}
public static void HandleShowchecksCommand(string module, string[] cmd)
{
ICommandConsole con = MainConsole.Instance;
if (cmd.Length > 2)
{
foreach (string name in cmd.Skip(2))
{
string[] components = name.Split('.');
string categoryName = components[0];
// string containerName = components.Length > 1 ? components[1] : null;
if (categoryName == ListSubCommand)
{
con.Output("check categories available are:");
foreach (string category in RegisteredChecks.Keys)
con.OutputFormat(" {0}", category);
}
// else
// {
// SortedDictionary<string, SortedDictionary<string, Check>> category;
// if (!Registeredchecks.TryGetValue(categoryName, out category))
// {
// con.OutputFormat("No such category as {0}", categoryName);
// }
// else
// {
// if (String.IsNullOrEmpty(containerName))
// {
// OutputConfiguredToConsole(con, category);
// }
// else
// {
// SortedDictionary<string, Check> container;
// if (category.TryGetValue(containerName, out container))
// {
// OutputContainerChecksToConsole(con, container);
// }
// else
// {
// con.OutputFormat("No such container {0} in category {1}", containerName, categoryName);
// }
// }
// }
// }
}
}
else
{
OutputAllChecksToConsole(con);
}
}
/// <summary>
/// Registers a statistic.
/// </summary>
/// <param name='stat'></param>
/// <returns></returns>
public static bool RegisterCheck(Check check)
{
SortedDictionary<string, SortedDictionary<string, Check>> category = null, newCategory;
SortedDictionary<string, Check> container = null, newContainer;
lock (RegisteredChecks)
{
// Check name is not unique across category/container/shortname key.
// XXX: For now just return false. This is to avoid problems in regression tests where all tests
// in a class are run in the same instance of the VM.
if (TryGetCheckParents(check, out category, out container))
return false;
// We take a copy-on-write approach here of replacing dictionaries when keys are added or removed.
// This means that we don't need to lock or copy them on iteration, which will be a much more
// common operation after startup.
if (container != null)
newContainer = new SortedDictionary<string, Check>(container);
else
newContainer = new SortedDictionary<string, Check>();
if (category != null)
newCategory = new SortedDictionary<string, SortedDictionary<string, Check>>(category);
else
newCategory = new SortedDictionary<string, SortedDictionary<string, Check>>();
newContainer[check.ShortName] = check;
newCategory[check.Container] = newContainer;
RegisteredChecks[check.Category] = newCategory;
}
return true;
}
/// <summary>
/// Deregister an check
/// </summary>>
/// <param name='stat'></param>
/// <returns></returns>
public static bool DeregisterCheck(Check check)
{
SortedDictionary<string, SortedDictionary<string, Check>> category = null, newCategory;
SortedDictionary<string, Check> container = null, newContainer;
lock (RegisteredChecks)
{
if (!TryGetCheckParents(check, out category, out container))
return false;
newContainer = new SortedDictionary<string, Check>(container);
newContainer.Remove(check.ShortName);
newCategory = new SortedDictionary<string, SortedDictionary<string, Check>>(category);
newCategory.Remove(check.Container);
newCategory[check.Container] = newContainer;
RegisteredChecks[check.Category] = newCategory;
return true;
}
}
public static bool TryGetCheckParents(
Check check,
out SortedDictionary<string, SortedDictionary<string, Check>> category,
out SortedDictionary<string, Check> container)
{
category = null;
container = null;
lock (RegisteredChecks)
{
if (RegisteredChecks.TryGetValue(check.Category, out category))
{
if (category.TryGetValue(check.Container, out container))
{
if (container.ContainsKey(check.ShortName))
return true;
}
}
}
return false;
}
public static void CheckChecks()
{
lock (RegisteredChecks)
{
foreach (SortedDictionary<string, SortedDictionary<string, Check>> category in RegisteredChecks.Values)
{
foreach (SortedDictionary<string, Check> container in category.Values)
{
foreach (Check check in container.Values)
{
if (!check.CheckIt())
m_log.WarnFormat(
"[CHECKS MANAGER]: Check {0}.{1}.{2} failed with message {3}", check.Category, check.Container, check.ShortName, check.LastFailureMessage);
}
}
}
}
}
private static void OutputAllChecksToConsole(ICommandConsole con)
{
foreach (var category in RegisteredChecks.Values)
{
OutputCategoryChecksToConsole(con, category);
}
}
private static void OutputCategoryChecksToConsole(
ICommandConsole con, SortedDictionary<string, SortedDictionary<string, Check>> category)
{
foreach (var container in category.Values)
{
OutputContainerChecksToConsole(con, container);
}
}
private static void OutputContainerChecksToConsole(ICommandConsole con, SortedDictionary<string, Check> container)
{
foreach (Check check in container.Values)
{
con.Output(check.ToConsoleString());
}
}
}
}
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