public static void ScanNodes(Cluster cluster, ScanPolicy policy, string ns, string setName, string[] binNames, ScanCallback callback, Node[] nodes)
{
policy.Validate();
// Detect cluster migrations when performing scan.
ulong taskId = RandomShift.ThreadLocalInstance.NextLong();
ulong clusterKey = policy.failOnClusterChange ? QueryValidate.ValidateBegin(nodes[0], ns) : 0;
bool first = true;
if (policy.concurrentNodes && nodes.Length > 1)
{
Executor executor = new Executor(nodes.Length);
foreach (Node node in nodes)
{
ScanCommand command = new ScanCommand(cluster, node, policy, ns, setName, binNames, callback, taskId, clusterKey, first);
executor.AddCommand(command);
first = false;
}
executor.Execute(policy.maxConcurrentNodes);
}
else
{
foreach (Node node in nodes)
{
ScanCommand command = new ScanCommand(cluster, node, policy, ns, setName, binNames, callback, taskId, clusterKey, first);
command.Execute();
first = false;
}
}
}
//-------------------------------------------------------
// Scan Operations
//-------------------------------------------------------
/// <summary>
/// Read all records in specified namespace and set. If the policy's
/// concurrentNodes is specified, each server node will be read in
/// parallel. Otherwise, server nodes are read in series.
/// <para>
/// This call will block until the scan is complete - callbacks are made
/// within the scope of this call.
/// </para>
/// </summary>
/// <param name="policy">scan configuration parameters, pass in null for defaults</param>
/// <param name="ns">namespace - equivalent to database name</param>
/// <param name="setName">optional set name - equivalent to database table</param>
/// <param name="callback">read callback method - called with record data</param>
/// <param name="binNames">
/// optional bin to retrieve. All bins will be returned if not specified.
/// Aerospike 2 servers ignore this parameter.
/// </param>
/// <exception cref="AerospikeException">if scan fails</exception>
public void ScanAll(ScanPolicy policy, string ns, string setName, ScanCallback callback, params string[] binNames)
{
if (policy == null)
{
policy = scanPolicyDefault;
}
Node[] nodes = cluster.Nodes;
if (nodes.Length == 0)
{
throw new AerospikeException(ResultCode.SERVER_NOT_AVAILABLE, "Scan failed because cluster is empty.");
}
if (policy.concurrentNodes)
{
Executor executor = new Executor(nodes.Length);
ulong taskId = RandomShift.ThreadLocalInstance.NextLong();
foreach (Node node in nodes)
{
ScanCommand command = new ScanCommand(node, policy, ns, setName, callback, binNames, taskId);
executor.AddCommand(command);
}
executor.Execute(policy.maxConcurrentNodes);
}
else
{
foreach (Node node in nodes)
{
ScanNode(policy, node, ns, setName, callback, binNames);
}
}
}
/// <summary>
/// Read all records in specified namespace and set for one node only.
/// <para>
/// This call will block until the scan is complete - callbacks are made
/// within the scope of this call.
/// </para>
/// </summary>
/// <param name="policy">scan configuration parameters, pass in null for defaults</param>
/// <param name="node">server node</param>
/// <param name="ns">namespace - equivalent to database name</param>
/// <param name="setName">optional set name - equivalent to database table</param>
/// <param name="callback">read callback method - called with record data</param>
/// <param name="binNames">
/// optional bin to retrieve. All bins will be returned if not specified.
/// Aerospike 2 servers ignore this parameter.
/// </param>
/// <exception cref="AerospikeException">if transaction fails</exception>
public void ScanNode(ScanPolicy policy, Node node, string ns, string setName, ScanCallback callback, params string[] binNames)
{
if (policy == null)
{
policy = scanPolicyDefault;
}
ulong taskId = RandomShift.ThreadLocalInstance.NextLong();
ScanCommand command = new ScanCommand(node, policy, ns, setName, callback, binNames, taskId);
command.Execute();
}
/// <summary>
/// Read all records in specified namespace and set for one node only.
/// <para>
/// This call will block until the scan is complete - callbacks are made
/// within the scope of this call.
/// </para>
/// </summary>
/// <param name="policy">scan configuration parameters, pass in null for defaults</param>
/// <param name="node">server node</param>
/// <param name="ns">namespace - equivalent to database name</param>
/// <param name="setName">optional set name - equivalent to database table</param>
/// <param name="callback">read callback method - called with record data</param>
/// <param name="binNames">
/// optional bin to retrieve. All bins will be returned if not specified.
/// Aerospike 2 servers ignore this parameter.
/// </param>
/// <exception cref="AerospikeException">if transaction fails</exception>
public void ScanNode(ScanPolicy policy, Node node, string ns, string setName, ScanCallback callback, params string[] binNames)
{
if (policy == null)
{
policy = scanPolicyDefault;
}
long taskId = Environment.TickCount;
ScanCommand command = new ScanCommand(node, policy, ns, setName, callback, binNames, taskId);
command.Execute();
}
