private async Task <DeleteResult> DeleteWithChildren(DeleteRequest request)
{
while (true)
{
var children = await GetChildrenAsync(new GetChildrenRequest(request.Path)).ConfigureAwait(false);
if (!children.IsSuccessful)
{
return(DeleteResult.Unsuccessful(children.Status, request.Path, children.Exception));
}
foreach (var name in children.ChildrenNames)
{
var deleted = await DeleteWithChildren(new DeleteRequest(ZooKeeperPath.Combine(request.Path, name))).ConfigureAwait(false);
if (!deleted.IsSuccessful)
{
return(DeleteResult.Unsuccessful(deleted.Status, request.Path, deleted.Exception));
}
}
var result = await ExecuteOperation(new DeleteOperation(request)).ConfigureAwait(false);
if (result.Status != ZooKeeperStatus.NodeHasChildren)
{
return(result);
}
// Note(kungurtsev): someone has created a new child since we checked, delete it again.
}
}
private async Task <CreateResult> CreateWithParents(CreateRequest request)
{
while (true)
{
var parentPath = ZooKeeperPath.GetParentPath(request.Path);
if (parentPath == null)
{
return(CreateResult.Unsuccessful(
ZooKeeperStatus.BadArguments,
request.Path,
new ArgumentException($"Can't get parent path for `{request.Path}`")));
}
var result = await CreateAsync(new CreateRequest(parentPath, CreateMode.Persistent)).ConfigureAwait(false);
if (!result.IsSuccessful && result.Status != ZooKeeperStatus.NodeAlreadyExists)
{
return(CreateResult.Unsuccessful(result.Status, request.Path, result.Exception));
}
result = await ExecuteOperation(new CreateOperation(request)).ConfigureAwait(false);
if (result.Status != ZooKeeperStatus.NodeNotFound)
{
return(result);
}
// Note(kungurtsev): someone has deleted our parent since we checked, create it again.
}
}
public void Split_followed_by_Combine_should_not_change_path(string path)
{
var expected = path;
for (var i = 0; i < 10; i++)
{
path = ZooKeeperPath.Combine(ZooKeeperPath.Split(path));
}
path.Should().Be(expected);
}
public async Task TestDoesNotAttemptToCreateOrDeleteExistingNode()
{
// This doesn't work because creating the lock attempts to acquire which will then fail initially. We could work around this by testing
// for a different set of conditions in the multi-ticket case, but the extra coverage doesn't seem valuable (we still have coverage of single-ticket)
if (IsMultiTicketSemaphoreProvider)
{
Assert.Pass("not supported");
}
var path = new ZooKeeperPath($"/{this.GetType()}.{nameof(this.TestDoesNotAttemptToCreateOrDeleteExistingNode)} ({TargetFramework.Current})");
using var connection = await ZooKeeperConnection.DefaultPool.ConnectAsync(
new ZooKeeperConnectionInfo (ZooKeeperPorts.DefaultConnectionString, TimeSpan.FromSeconds(30), TimeSpan.FromSeconds(30), new EquatableReadOnlyList <ZooKeeperAuthInfo>(Array.Empty <ZooKeeperAuthInfo>())),
CancellationToken.None
);
// pre-clean up just in case
try { await connection.ZooKeeper.deleteAsync(path.ToString()); }
catch (KeeperException.NoNodeException) { }
this._provider.Strategy.AssumeNodeExists = true;
var @lock = this._provider.CreateLockWithExactName(path.ToString());
Assert.That(
Assert.ThrowsAsync <InvalidOperationException>(() => @lock.TryAcquireAsync().AsTask()).Message,
Does.Contain("does not exist")
);
await connection.ZooKeeper.createAsync(path.ToString(), Array.Empty <byte>(), new List <ACL> {
ZooKeeperNodeCreator.PublicAcl
}, CreateMode.PERSISTENT);
try
{
await using (var handle = await @lock.TryAcquireAsync())
{
Assert.IsNotNull(handle);
}
Assert.IsNotNull(await connection.ZooKeeper.existsAsync(path.ToString()));
}
finally
{
await connection.ZooKeeper.deleteAsync(path.ToString());
}
}
public void GetSequentialNodeIndex_should_provide_correct_node_index(string path, long?expectedIndex)
{
ZooKeeperPath.GetSequentialNodeIndex(path).Should().Be(expectedIndex);
}
public void GetNodeName_should_provide_correct_node_name(string path, string expectedName)
{
ZooKeeperPath.GetNodeName(path).Should().Be(expectedName);
}
public void GetParentPath_should_provide_correct_parent_paths(string path, string expectedParent)
{
ZooKeeperPath.GetParentPath(path).Should().Be(expectedParent);
}
public void Combine_should_work_correctly_for_two_segments(string basePath, string relativePath, string expected)
{
ZooKeeperPath.Combine(basePath, relativePath).Should().Be(expected);
}
public void Combine_should_work_correctly_for_multiple_segments(string[] segments, string expected)
{
ZooKeeperPath.Combine(segments).Should().Be(expected);
}
public void Split_should_split_by_slashes(string path, string[] expected)
{
ZooKeeperPath.Split(path).Should().BeEquivalentTo(expected, options => options.WithStrictOrdering());
}
public string BuildReplicaPath([NotNull] string environment, [NotNull] string application, [NotNull] string replica) => ZooKeeperPath.Combine(BuildApplicationPath(environment, application), Escape(replica));
public string BuildApplicationPath([NotNull] string environment, [NotNull] string application) => ZooKeeperPath.Combine(BuildEnvironmentPath(environment), Escape(application));
