/// <summary>
/// 清理所有存在的连接
/// 然后重新创建
/// </summary>
public void Clear()
{
poolState = POOL_SUSPENDED;
PoolEntry poolEntry = null;
//清理资源
while (true)
{
if (connectionBag.TryPop(out poolEntry))
{
CloseConnection(poolEntry.Close());
}
else if (connectionBag.IsEmpty)
{
break;
}
else
{
continue;
}
}
size = 0;
//
keepingExecutor.Clear(); //清除
poolState = POOL_NORMAL;
resetEvent.Set(); //恢复等待；
}
/// <summary>
/// 关闭池，不能再使用
/// </summary>
public void ShutDown()
{
lock (lock_obj)
{
try
{
poolState = POOL_SHUTDOWN;
PoolEntry poolEntry = null;
//清理资源
while (true)
{
if (connectionBag.TryPop(out poolEntry))
{
CloseConnection(poolEntry.Close());
}
else if (connectionBag.IsEmpty)
{
break;
}
else
{
continue;
}
}
size = 0;
keepingExecutor.Stop();//清除所有资源
LogPoolState("Before shutdown ");
}
finally
{
LogPoolState("After shutdown ");
}
}
}
/// <summary>
/// 释放使用
/// </summary>
/// <param name="poolEntry"></param>
internal void Recycle(PoolEntry poolEntry)
{
if (poolEntry.State == IConcurrentBagEntry.STATE_REMOVED)
{
//已经标记移除的不能再加入，集合也不允许
CloseConnection(poolEntry.Close());
return;
}
if (!connectionBag.Push(poolEntry))
{
CloseConnection(poolEntry.Close());
}
else
{
//监视空闲
keepingExecutor.ScheduleIdleTimeout(poolEntry);
}
}
/// <summary>
/// 超时获取
/// </summary>
/// <param name="hardTimeout">毫秒</param>
/// <returns></returns>
public IDbConnection GetConnection(long hardTimeout)
{
if (poolState == POOL_SHUTDOWN)
{
return(null);
}
if (poolState == POOL_SUSPENDED)
{
//挂起操作
resetEvent.WaitOne();
}
long startTime = DateTime.Now.Ticks;
try
{
long timeout = hardTimeout;
do
{
PoolEntry poolEntry = null;
if (connectionBag.TryPop(out poolEntry))
{
try
{
if (poolEntry.State == IConcurrentBagEntry.STATE_REMOVED)
{
//已经要移除的
CloseConnection(poolEntry.Close());
continue;//继续获取
}
keepingExecutor.ScheduleUse(poolEntry);
}
catch (Exception ex)
{
throw new Exception("获取失败:" + ex.Message);
}
//每次产生代理连接，代理连接在外面会关闭，返回连接池的对象
return(poolEntry.CreateProxyConnection(DateTime.Now.Ticks));
}
else
{
CheckPool();//监测连接
if (size < config.MaximumPoolSize)
{
//创建新的,不再进入集合
poolEntry = CreatePoolEntry();
if (poolEntry != null)
{
poolEntry.CompareAndSetState(IConcurrentBagEntry.STATE_NOT_IN_USE, IConcurrentBagEntry.STATE_IN_USE);
keepingExecutor.ScheduleUse(poolEntry);
return(poolEntry.CreateProxyConnection(DateTime.Now.Ticks));
}
else
{
continue;
}
}
}
//计算获取的时间，转化成ms
timeout = timeout - (DateTime.Now.Ticks - startTime) / tickms;
} while (timeout > 0L);
}
catch (Exception e)
{
throw new SQLException(poolName + " - Interrupted during connection acquisition", e);
}
finally
{
}
return(null);
}
