Add checks monitoring framework to provide alerts if certain conditions do not hold.

Not yet in use.

OpenSim/Framework/Monitoring/Checks/Check.cs

@@ -0,0 +1,118 @@
+/*
+ * 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.Text;
+
+namespace OpenSim.Framework.Monitoring
+{
+    public class Check
+    {
+//        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        public static readonly char[] DisallowedShortNameCharacters = { '.' };
+
+        /// <summary>
+        /// Category of this stat (e.g. cache, scene, etc).
+        /// </summary>
+        public string Category { get; private set; }
+
+        /// <summary>
+        /// Containing name for this stat.
+        /// FIXME: In the case of a scene, this is currently the scene name (though this leaves
+        /// us with a to-be-resolved problem of non-unique region names).
+        /// </summary>
+        /// <value>
+        /// The container.
+        /// </value>
+        public string Container { get; private set; }
+
+        /// <summary>
+        /// Action used to check whether alert should go off.
+        /// </summary>
+        /// <remarks>
+        /// Should return true if check passes.  False otherwise.
+        /// </remarks>
+        public Func<Check, bool> CheckFunc { get; private set; }
+
+        /// <summary>
+        /// Message from the last failure, if any.  If there is no message or no failure then will be null.
+        /// </summary>
+        /// <remarks>
+        /// Should be set by the CheckFunc when applicable.
+        /// </remarks>
+        public string LastFailureMessage { get; set; }
+
+        public StatVerbosity Verbosity { get; private set; }
+        public string ShortName { get; private set; }
+        public string Name { get; private set; }
+        public string Description { get; private set; }
+
+        public Check(
+            string shortName,
+            string name,
+            string description,
+            string category,
+            string container,
+            Func<Check, bool> checkFunc,
+            StatVerbosity verbosity) 
+        {
+            if (ChecksManager.SubCommands.Contains(category))
+                throw new Exception(
+                    string.Format("Alert cannot be in category '{0}' since this is reserved for a subcommand", category));
+
+            foreach (char c in DisallowedShortNameCharacters)
+            {
+                if (shortName.IndexOf(c) != -1)
+                    throw new Exception(string.Format("Alert name {0} cannot contain character {1}", shortName, c));
+            }
+
+            ShortName = shortName;
+            Name = name;
+            Description = description;
+            Category = category;
+            Container = container;
+            CheckFunc = checkFunc;
+            Verbosity = verbosity;
+        }
+
+        public bool CheckIt()
+        {
+            return CheckFunc(this);
+        }
+
+        public virtual string ToConsoleString()
+        {
+            return string.Format(
+                "{0}.{1}.{2} - {3}", 
+                Category, 
+                Container, 
+                ShortName,
+                Description);
+        }
+    }
+}