/// <summary>
/// Updates the client member and cassandra member to the next host in the ring.
/// Returns the current client to the pool and retreives a new client from the
/// next pool.
/// </summary>
void SkipToNextHost()
{
//log.info("Skipping to next host. Current host is: {}", client.getUrl());
try
{
Client.MarkAsError();
pool.Return(Client.Endpoint, Client);
Client.RemoveKeyspace(this);
}
catch // (Exception e)
{
//log.error("Unable to invalidate client {}. Will continue anyhow.", client);
}
string nextHost = GetNextHost(Client.Endpoint.Host, Client.Endpoint.IP);
if (nextHost == null)
{
//log.error("Unable to find next host to skip to at {}", tostring());
throw new Exception("Unable to failover to next host");
}
// assume they use the same port
Client = pool.Borrow(new Endpoint(nextHost, Client.Port));
cassandra = Client.Client;
monitor.IncrementCounter(ClientCounter.SKIP_HOST_SUCCESS);
//log.info("Skipped host. New host is: {}", client.getUrl());
}
/// <summary>
/// Performs the operation on the given cassandra instance.
/// </summary>
/// <param name="client">client</param>
/// <returns>null if no execute handler</returns>
public void Execute(Cassandra.Iface client)
{
if (Handler == null)
{
throw new ApplicationException("Execution Handler was null");
}
Result = Handler(client);
}
public Keyspace(
ICassandraClient client,
string keyspaceName,
IDictionary<string, Dictionary<string, string>> description,
ConsistencyLevel consistencyLevel,
FailoverPolicy failoverPolicy,
IKeyedObjectPool<Endpoint, ICassandraClient> pool,
ICassandraClientMonitor monitor)
{
if (client == null)
throw new ArgumentNullException("client");
this.Client = client;
this.ConsistencyLevel = consistencyLevel;
this.Description = description;
this.Name = keyspaceName;
this.cassandra = client.Client as Cassandra.Client;
this.FailoverPolicy = failoverPolicy;
this.pool = pool;
this.monitor = monitor;
InitFailover();
}
public Keyspace(
ICassandraClient client,
string keyspaceName,
IDictionary <string, Dictionary <string, string> > description,
ConsistencyLevel consistencyLevel,
FailoverPolicy failoverPolicy,
IKeyedObjectPool <Endpoint, ICassandraClient> pool,
ICassandraClientMonitor monitor)
{
if (client == null)
{
throw new ArgumentNullException("client");
}
this.Client = client;
this.ConsistencyLevel = consistencyLevel;
this.Description = description;
this.Name = keyspaceName;
this.cassandra = client.Client as Cassandra.Client;
this.FailoverPolicy = failoverPolicy;
this.pool = pool;
this.monitor = monitor;
InitFailover();
}
/// <summary>
/// Updates the client member and cassandra member to the next host in the ring.
/// Returns the current client to the pool and retreives a new client from the
/// next pool.
/// </summary>
void SkipToNextHost()
{
//log.info("Skipping to next host. Current host is: {}", client.getUrl());
try
{
Client.MarkAsError();
pool.Return(Client.Endpoint, Client);
Client.RemoveKeyspace(this);
}
catch// (Exception e)
{
//log.error("Unable to invalidate client {}. Will continue anyhow.", client);
}
string nextHost = GetNextHost(Client.Endpoint.Host, Client.Endpoint.IP);
if (nextHost == null)
{
//log.error("Unable to find next host to skip to at {}", tostring());
throw new Exception("Unable to failover to next host");
}
// assume they use the same port
Client = pool.Borrow(new Endpoint(nextHost, Client.Port));
cassandra = Client.Client;
monitor.IncrementCounter(ClientCounter.SKIP_HOST_SUCCESS);
//log.info("Skipped host. New host is: {}", client.getUrl());
}
