/// <exception cref="System.IO.IOException"/>
public ShortCircuitRegistry(Configuration conf)
{
bool enabled = false;
SharedFileDescriptorFactory shmFactory = null;
DomainSocketWatcher watcher = null;
try
{
int interruptCheck = conf.GetInt(DFSConfigKeys.DfsShortCircuitSharedMemoryWatcherInterruptCheckMs
, DFSConfigKeys.DfsShortCircuitSharedMemoryWatcherInterruptCheckMsDefault);
if (interruptCheck <= 0)
{
throw new IOException(DFSConfigKeys.DfsShortCircuitSharedMemoryWatcherInterruptCheckMs
+ " was set to " + interruptCheck);
}
string[] shmPaths = conf.GetTrimmedStrings(DFSConfigKeys.DfsDatanodeSharedFileDescriptorPaths
);
if (shmPaths.Length == 0)
{
shmPaths = DFSConfigKeys.DfsDatanodeSharedFileDescriptorPathsDefault.Split(",");
}
shmFactory = SharedFileDescriptorFactory.Create("HadoopShortCircuitShm_", shmPaths
);
string dswLoadingFailure = DomainSocketWatcher.GetLoadingFailureReason();
if (dswLoadingFailure != null)
{
throw new IOException(dswLoadingFailure);
}
watcher = new DomainSocketWatcher(interruptCheck, "datanode");
enabled = true;
if (Log.IsDebugEnabled())
{
Log.Debug("created new ShortCircuitRegistry with interruptCheck=" + interruptCheck
+ ", shmPath=" + shmFactory.GetPath());
}
}
catch (IOException e)
{
if (Log.IsDebugEnabled())
{
Log.Debug("Disabling ShortCircuitRegistry", e);
}
}
finally
{
this.enabled = enabled;
this.shmFactory = shmFactory;
this.watcher = watcher;
}
}
/// <exception cref="System.IO.IOException"/>
internal DfsClientShmManager(int interruptCheckPeriodMs)
{
this.domainSocketWatcher = new DomainSocketWatcher(interruptCheckPeriodMs, "client"
);
}
