public async Task Teardown()
{
foreach (var key in _documentsToDelete)
{
await _collection.RemoveAsync(key);
}
await _cluster.DisposeAsync();
}
public async ValueTask DisposeAsync()
{
if (!_disposed)
{
_disposed = true;
await(_cluster?.DisposeAsync() ?? default).ConfigureAwait(false);
_cluster = null;
}
}
public async Task Teardown()
{
DocumentsToRemove.ForEach(async key =>
{
try
{
await Collection.RemoveAsync(key);
}
catch
{
// if there's an exception throw because that key doesn't exist
// that's fine, but there many be others in DocumentsToRemove
// so that's why this exception is being swallowed
}
});
await TestCluster.DisposeAsync();
}
public async Task Teardown()
{
await Cluster.DisposeAsync();
}
public async ValueTask DisposeAsync()
{
await Bucket.DisposeAsync().ConfigureAwait(false);
await Cluster.DisposeAsync().ConfigureAwait(false);
}
static async Task Main(string[] args)
{
// SETUP: connect to Couchbase
_cluster = await Cluster.ConnectAsync(
"couchbase://localhost",
"Administrator",
"password");
_bucket = await _cluster.BucketAsync("matt");
_scope = await _bucket.ScopeAsync("myScope");
_coll = await _scope.CollectionAsync("myCollection");
// SETUP: create a 'conference' document and a 'conference activities' document
await SetupInitialDocuments();
// STEP 1: create transactions object
var transactions = Transactions.Create(_cluster,
TransactionConfigBuilder.Create()
.DurabilityLevel(DurabilityLevel.MajorityAndPersistToActive) // since I have 1 node, replication must be 0, or this will throw exception
.Build());
Console.WriteLine("Press ENTER to continue");
Console.ReadLine();
// STEP 2: transaction operations
await transactions.RunAsync(async (ctx) =>
{
var now = DateTime.Now;
// FIRST: get the two document I want to change
var confDoc = await ctx.GetAsync(_coll, "dataLove2021");
var actsDoc = await ctx.GetAsync(_coll, "dataLove2021::activities");
var conf = confDoc.ContentAs <Conference>();
var acts = actsDoc.ContentAs <ConferenceActivities>();
// SECOND: add an event to the "activities" document
acts.Events.Add(new ConferenceEvent
{
Type = "CFP",
DtActivity = now,
Desc = "Submitted to the CFP"
});
// acts.Events.Add(new ConferenceEvent
// {
// Type = "PRESENTATION",
// DtActivity = now,
// Desc = "Delivered ACID presentation"
// });
// acts.Events.Add(new ConferenceEvent
// {
// Type = "SPATIAL",
// DtActivity = now,
// Desc = "Answered questions in Spatial Chat"
// });
// THIRD: change the "conference" document
conf.Followups = (conf.Followups ?? 0) + 1;
conf.LastActivity = now;
// FOURTH: write the changes
await ctx.ReplaceAsync(confDoc, conf);
// OPTIONAL STEP: fail right in the middle of the transaction making two writes
// var fail = true;
// if(fail) throw new Exception("Something went wrong!");
await ctx.ReplaceAsync(actsDoc, acts);
// FIFTH: commit (implied)
});
await _cluster.DisposeAsync();
}
private async Task DisconnectAsync()
{
await Bucket.DisposeAsync().ConfigureAwait(false);
await Cluster.DisposeAsync().ConfigureAwait(false);
}
