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From Lucas Nodine <lucasnod...@gmail.com>
Subject batch_mutate silently failing in Cassandra
Date Tue, 07 Sep 2010 14:11:23 GMT
Hello all,

I have posted the following to Stackoverflow, but thought that I would also
try the list.  If you have any suggestions, please let me know

I am working with Cassandra 0.6.5 using the thrift interface. I am trying to
use the batch_mutate method call, however, when I execute it, I receive no
error message. This leads me to believe it worked. When I check using the
CLI, there is nothing there. Is there something wrong with my code or format
of the mutation_map that anyone can see? Any ideas?

Thanks in advance,

LN

public void Update(string keyspace, Common.NetworkPackage.MetaAsset ma) {
  Dictionary<string, Dictionary<string, List<Mutation>>> package;
  Dictionary<string, List<Mutation>> packageEntry;
  Dictionary<string, object>.Enumerator en;
  List<Mutation> mutList;
  Mutation mut;
  DateTime now = DateTime.Now;

  if(!ma.Fields.ContainsKey("$guid"))
    throw new ArgumentException("The field $guid is not present");

  mutList = new List<Mutation>();
  en = ma.Fields.GetEnumerator();

  while(en.MoveNext())
  {
    if (en.Current.Value == null)
      continue;
    mut = new Mutation();
    mut.Column_or_supercolumn = new ColumnOrSuperColumn();
    mut.Column_or_supercolumn.Column = new Column();
    mut.Column_or_supercolumn.Column.Name = _utf8.GetBytes(en.Current.Key);

    if (en.Current.Value == null)
      mut.Column_or_supercolumn.Column.Value = null;
    else
      mut.Column_or_supercolumn.Column.Value = ToBytes(en.Current.Value);

    mut.Column_or_supercolumn.Column.Timestamp =
Utilities.Timestamp(now);
    mutList.Add(mut);
  }

  packageEntry = new Dictionary<string, List<Mutation>>();
  packageEntry.Add("MetaAsset", mutList);

  package = new Dictionary<string, Dictionary<string, List<Mutation>>>();
  package.Add((string)ma.Fields["$guid"], packageEntry);

  Console.WriteLine(Utilities.ExportBulkMutate("LawOffice", package));

  _client.batch_mutate(keyspace, package, ConsistencyLevel.QUORUM); }

The above code produces (columns are name:value @ timestamp, value consists
of a type:and a representation of the actual value):

LawOffice : {
 Row=08469fba50f448be8943614abd059d10 : {
   CF=MetaAsset : {
    $guid : String:08469fba50f448be8943614abd059d10 @ 93
    $creator : String:Lucas @ 93
    $previousversion : String:00000000000000000000000000000000 @ 93
    $nextversion : String:00000000000000000000000000000000 @ 93
    $etag : String:0 @ 93
    $length : Int32:123456789 @ 93
    $extension : String:.odt @ 93
    $created : DateTime:90 @ 93
    $modified : DateTime:90 @ 93
    $lastaccess : DateTime:90 @ 93
    $title : String:Title @ 93
    $tags : List`1:tag1,tag2,tag3 @ 93
   }
 }
}

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