/// <summary>
/// Add the passed
/// <see cref="Service"/>
/// to the list of services managed by this
/// <see cref="CompositeService"/>
/// </summary>
/// <param name="service">
/// the
/// <see cref="Service"/>
/// to be added
/// </param>
protected internal virtual void AddService(Org.Apache.Hadoop.Service.Service service
)
{
if (Log.IsDebugEnabled())
{
Log.Debug("Adding service " + service.GetName());
}
lock (serviceList)
{
serviceList.AddItem(service);
}
}
/// <summary>Stop a service; if it is null do nothing.</summary>
/// <remarks>
/// Stop a service; if it is null do nothing. Exceptions are caught and
/// logged at warn level. (but not Throwables). This operation is intended to
/// be used in cleanup operations
/// </remarks>
/// <param name="log">the log to warn at</param>
/// <param name="service">a service; may be null</param>
/// <returns>any exception that was caught; null if none was.</returns>
/// <seealso cref="StopQuietly(Service)"/>
public static Exception StopQuietly(Log log, Org.Apache.Hadoop.Service.Service service
)
{
try
{
Stop(service);
}
catch (Exception e)
{
log.Warn("When stopping the service " + service.GetName() + " : " + e, e);
return(e);
}
return(null);
}
public virtual void StateChanged(Org.Apache.Hadoop.Service.Service service)
{
lock (this)
{
eventCount++;
lastService = service;
lastState = service.GetServiceState();
stateEventList.AddItem(lastState);
if (lastState == failingState)
{
failureCount++;
throw new BreakableService.BrokenLifecycleEvent(service, "Failure entering " + lastState
+ " for " + service.GetName());
}
}
}
/// <summary>Callback for a state change event: log it</summary>
/// <param name="service">the service that has changed.</param>
public virtual void StateChanged(Org.Apache.Hadoop.Service.Service service)
{
log.Info("Entry to state " + service.GetServiceState() + " for " + service.GetName
());
}