public void DetectDeadlockPolicy(
string home, DeadlockPolicy deadlock)
{
Configuration.ClearDir(home);
DatabaseEnvironmentConfig envConfig =
new DatabaseEnvironmentConfig();
envConfig.Create = true;
envConfig.UseLocking = true;
envConfig.UseLogging = true;
envConfig.UseMPool = true;
envConfig.UseTxns = true;
DatabaseEnvironment env = DatabaseEnvironment.Open(
home, envConfig);
env.DeadlockResolution = deadlock;
Assert.AreEqual(deadlock, env.DeadlockResolution);
env.DetectDeadlocks(deadlock);
env.Close();
}
public static void ConfirmDeadlockPolicy(XmlElement xmlElem,
string name, DeadlockPolicy deadlockPolicy, bool compulsory)
{
XmlNode xmlNode = XMLReader.GetNode(xmlElem, name);
if (xmlNode == null && compulsory == true)
throw new ConfigNotFoundException(name);
else if (xmlNode != null)
{
string policy = xmlNode.InnerText;
if (policy == "DEFAULT")
Assert.AreEqual(DeadlockPolicy.DEFAULT, deadlockPolicy);
else if (policy == "EXPIRE")
Assert.AreEqual(DeadlockPolicy.EXPIRE, deadlockPolicy);
else if (policy == "MAX_LOCKS")
Assert.AreEqual(DeadlockPolicy.MAX_LOCKS, deadlockPolicy);
else if (policy == "MAX_WRITE")
Assert.AreEqual(DeadlockPolicy.MAX_WRITE, deadlockPolicy);
else if (policy == "MIN_LOCKS")
Assert.AreEqual(DeadlockPolicy.MIN_LOCKS, deadlockPolicy);
else if (policy == "MIN_WRITE")
Assert.AreEqual(DeadlockPolicy.MIN_WRITE, deadlockPolicy);
else if (policy == "OLDEST")
Assert.AreEqual(DeadlockPolicy.OLDEST, deadlockPolicy);
else if (policy == "RANDOM")
Assert.AreEqual(DeadlockPolicy.RANDOM, deadlockPolicy);
else if (policy == "YOUNGEST")
Assert.AreEqual(DeadlockPolicy.YOUNGEST, deadlockPolicy);
else
throw new InvalidConfigException(name);
}
}
/// <summary>
/// Run one iteration of the deadlock detector. The deadlock detector
/// traverses the lock table and marks one of the participating lock
/// requesters for rejection in each deadlock it finds.
/// </summary>
/// <param name="atype">Specify which lock request(s) to reject</param>
/// <returns>The number of lock requests that were rejected.</returns>
public uint DetectDeadlocks(DeadlockPolicy atype)
{
uint rejectCount = 0;
if (atype == null)
atype = DeadlockPolicy.DEFAULT;
dbenv.lock_detect(0, atype.policy, ref rejectCount);
return rejectCount;
}
public static bool ConfigDeadlockPolicy(XmlElement xmlElem,
string name, ref DeadlockPolicy deadlockPolicy, bool compulsory)
{
XmlNode xmlNode = XMLReader.GetNode(xmlElem, name);
if (xmlNode == null && compulsory == false)
return false;
else if (xmlNode == null && compulsory == true)
throw new ConfigNotFoundException(name);
string policy = xmlNode.InnerText;
if (policy == "DEFAULT")
deadlockPolicy = DeadlockPolicy.DEFAULT;
else if (policy == "EXPIRE")
deadlockPolicy = DeadlockPolicy.EXPIRE;
else if (policy == "MAX_LOCKS")
deadlockPolicy = DeadlockPolicy.MAX_LOCKS;
else if (policy == "MAX_WRITE")
deadlockPolicy = DeadlockPolicy.MAX_WRITE;
else if (policy == "MIN_LOCKS")
deadlockPolicy = DeadlockPolicy.MIN_LOCKS;
else if (policy == "MIN_WRITE")
deadlockPolicy = DeadlockPolicy.MIN_WRITE;
else if (policy == "OLDEST")
deadlockPolicy = DeadlockPolicy.OLDEST;
else if (policy == "RANDOM")
deadlockPolicy = DeadlockPolicy.RANDOM;
else if (policy == "YOUNGEST")
deadlockPolicy = DeadlockPolicy.YOUNGEST;
else
throw new InvalidConfigException(name);
return true;
}
