internal static ReplicaInfo SelectReplicaToDelete(ReplicaInfo replica1, ReplicaInfo
replica2)
{
ReplicaInfo replicaToKeep;
ReplicaInfo replicaToDelete;
// it's the same block so don't ever delete it, even if GS or size
// differs. caller should keep the one it just discovered on disk
if (replica1.GetBlockFile().Equals(replica2.GetBlockFile()))
{
return(null);
}
if (replica1.GetGenerationStamp() != replica2.GetGenerationStamp())
{
replicaToKeep = replica1.GetGenerationStamp() > replica2.GetGenerationStamp() ? replica1
: replica2;
}
else
{
if (replica1.GetNumBytes() != replica2.GetNumBytes())
{
replicaToKeep = replica1.GetNumBytes() > replica2.GetNumBytes() ? replica1 : replica2;
}
else
{
if (replica1.GetVolume().IsTransientStorage() && !replica2.GetVolume().IsTransientStorage
())
{
replicaToKeep = replica2;
}
else
{
replicaToKeep = replica1;
}
}
}
replicaToDelete = (replicaToKeep == replica1) ? replica2 : replica1;
if (Log.IsDebugEnabled())
{
Log.Debug("resolveDuplicateReplicas decide to keep " + replicaToKeep + ". Will try to delete "
+ replicaToDelete);
}
return(replicaToDelete);
}
private static void AssertEquals(ReplicaInfo originalInfo, ReplicaRecoveryInfo recoveryInfo
)
{
NUnit.Framework.Assert.AreEqual(originalInfo.GetBlockId(), recoveryInfo.GetBlockId
());
NUnit.Framework.Assert.AreEqual(originalInfo.GetGenerationStamp(), recoveryInfo.GetGenerationStamp
());
NUnit.Framework.Assert.AreEqual(originalInfo.GetBytesOnDisk(), recoveryInfo.GetNumBytes
());
NUnit.Framework.Assert.AreEqual(originalInfo.GetState(), recoveryInfo.GetOriginalReplicaState
());
}
/// <summary>
/// Get the meta information of the replica that matches both block id
/// and generation stamp
/// </summary>
/// <param name="bpid">block pool id</param>
/// <param name="block">block with its id as the key</param>
/// <returns>the replica's meta information</returns>
/// <exception cref="System.ArgumentException">if the input block or block pool is null
/// </exception>
internal virtual ReplicaInfo Get(string bpid, Block block)
{
CheckBlockPool(bpid);
CheckBlock(block);
ReplicaInfo replicaInfo = Get(bpid, block.GetBlockId());
if (replicaInfo != null && block.GetGenerationStamp() == replicaInfo.GetGenerationStamp
())
{
return(replicaInfo);
}
return(null);
}
/// <summary>
/// Remove the replica's meta information from the map that matches
/// the input block's id and generation stamp
/// </summary>
/// <param name="bpid">block pool id</param>
/// <param name="block">block with its id as the key</param>
/// <returns>the removed replica's meta information</returns>
/// <exception cref="System.ArgumentException">if the input block is null</exception>
internal virtual ReplicaInfo Remove(string bpid, Block block)
{
CheckBlockPool(bpid);
CheckBlock(block);
lock (mutex)
{
IDictionary <long, ReplicaInfo> m = map[bpid];
if (m != null)
{
long key = Sharpen.Extensions.ValueOf(block.GetBlockId());
ReplicaInfo replicaInfo = m[key];
if (replicaInfo != null && block.GetGenerationStamp() == replicaInfo.GetGenerationStamp
())
{
return(Sharpen.Collections.Remove(m, key));
}
}
}
return(null);
}
