/// <summary>
/// Creates an instance of the partition instance
/// </summary>
/// <param name="name">Name of the partition instance</param>
/// <param name="type">Type of the partition</param>
/// <param name="stringPartitionKey">Name of the partition if Named partition type</param>
/// <param name="intPartitionKey">Range of the partition if range partition type</param>
public PartitionRecord(Uri name, PartitionKeyType type, string stringPartitionKey, IntegerPartitionKeyRange intPartitionKey)
{
this.InstanceName = name;
this.PartitionType = type;
this.StringPartitionPartitionKey = stringPartitionKey;
this.Int64PartitionPartitionKey = intPartitionKey;
this.InboundSessions = new Dictionary <string, IReliableMessagingSession>();
}
/// <summary>
/// Create and Initialize partitions for the given service instance .
/// </summary>
/// <param name="instance">Initialize partitions for this service instance</param>
/// <param name="isRandomPartitionType">true - if the partition type is selected randomly - String or Int64</param>
/// <param name="type">Set the partition type to this parameter, if isRandomPartitionType is false.
/// Singleton type is not allowed as we will set this type if instance partitions count = 1</param>
/// <param name="int64PartitionKeyLowValMultiplier"></param>
static void InitializePartitions(InstanceRecord instance, bool isRandomPartitionType, PartitionKeyType type, int int64PartitionKeyLowValMultiplier)
{
// Singletone is not a valid type
VS.Assert.IsTrue(type != PartitionKeyType.Singleton, "unexpected partition key type {0} in StartSessionManagersForServiceInstance", type);
// Ensure we have a valid partitions count > 0
Uri instanceName = instance.InstanceName;
int partitionCount = instance.CountOfPartitions;
VS.Assert.IsTrue(partitionCount > 0, "unexpected partitionCount {0} in StartSessionManagersForServiceInstance", partitionCount);
// singleton case
if (partitionCount == 1)
{
PartitionRecord newPartition = new PartitionRecord(
instanceName,
PartitionKeyType.Singleton,
null,
new IntegerPartitionKeyRange());
instance.Partitions[0] = newPartition;
return;
}
bool stringPartitions = false;
// randomly allocate string or int64 partition type.
if (isRandomPartitionType)
{
stringPartitions = (RandGen.Next() % 2) == 0; // decide if we have string or int64 partitions
}
else
{
if (type == PartitionKeyType.StringKey)
{
stringPartitions = true;
}
}
for (int i = 0; i < partitionCount; i++)
{
PartitionRecord newPartition;
if (stringPartitions)
{
// string partition key
string partitionKey = i.ToString(CultureInfo.InvariantCulture);
newPartition = new PartitionRecord(
instanceName,
PartitionKeyType.StringKey,
partitionKey,
new IntegerPartitionKeyRange());
instance.Partitions[i] = newPartition;
LogHelper.Log("Created; Instance: {0} StringPartition: {1}", instanceName, partitionKey);
}
// numerical partition key -- single number range
IntegerPartitionKeyRange partitionInt64Key = new IntegerPartitionKeyRange
{
IntegerKeyLow = i * int64PartitionKeyLowValMultiplier,
IntegerKeyHigh = i * int64PartitionKeyLowValMultiplier + (RandGen.Next() % (int64PartitionKeyLowValMultiplier - 1))
};
newPartition = new PartitionRecord(
instanceName,
PartitionKeyType.Int64Key,
null,
partitionInt64Key);
instance.Partitions[i] = newPartition;
LogHelper.Log("Created; Instance: {0} Int64Partition: {1}-{2}", instanceName, partitionInt64Key.IntegerKeyLow, partitionInt64Key.IntegerKeyHigh);
}
}
