org.apache.cassandra.service
Class ClientState

java.lang.Object
  org.apache.cassandra.service.ClientState

public class ClientState
extends java.lang.Object

A container for per-client, thread-local state that Avro/Thrift threads must hold. TODO: Kill thrift exceptions

Constructor Summary

ClientState()
Construct a new, empty ClientState: can be reused after logout() or reset().

Method Summary

java.lang.String	getKeyspace()
java.lang.String	getSchedulingValue()
long	getTimestamp() This clock guarantees that updates from a given client will be ordered in the sequence seen, even if multiple updates happen in the same millisecond.
void	hasColumnFamilyAccess(java.lang.String columnFamily, Permission perm) Confirms that the client thread has the given Permission in the context of the given ColumnFamily and the current keyspace.
void	hasColumnFamilySchemaAccess(Permission perm) Confirms that the client thread has the given Permission for the ColumnFamily list of the current keyspace.
void	hasKeyspaceSchemaAccess(Permission perm) Confirms that the client thread has the given Permission for the Keyspace list.
void	login(java.util.Map<? extends java.lang.CharSequence,? extends java.lang.CharSequence> credentials) Attempts to login this client with the given credentials map.
void	logout()
void	reset()
void	setKeyspace(java.lang.String ks)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ClientState

public ClientState()

Construct a new, empty ClientState: can be reused after logout() or reset().

Method Detail

getKeyspace

public java.lang.String getKeyspace()
                             throws org.apache.cassandra.thrift.InvalidRequestException

Throws:

org.apache.cassandra.thrift.InvalidRequestException

setKeyspace

public void setKeyspace(java.lang.String ks)

getSchedulingValue

public java.lang.String getSchedulingValue()

login

public void login(java.util.Map<? extends java.lang.CharSequence,? extends java.lang.CharSequence> credentials)
           throws org.apache.cassandra.thrift.AuthenticationException

Attempts to login this client with the given credentials map.

Throws:

org.apache.cassandra.thrift.AuthenticationException

logout

public void logout()

reset

public void reset()

hasKeyspaceSchemaAccess

public void hasKeyspaceSchemaAccess(Permission perm)
                             throws org.apache.cassandra.thrift.InvalidRequestException

Confirms that the client thread has the given Permission for the Keyspace list.

Throws:

org.apache.cassandra.thrift.InvalidRequestException

hasColumnFamilySchemaAccess

public void hasColumnFamilySchemaAccess(Permission perm)
                                 throws org.apache.cassandra.thrift.InvalidRequestException

Confirms that the client thread has the given Permission for the ColumnFamily list of the current keyspace.

Throws:

org.apache.cassandra.thrift.InvalidRequestException

hasColumnFamilyAccess

public void hasColumnFamilyAccess(java.lang.String columnFamily,
                                  Permission perm)
                           throws org.apache.cassandra.thrift.InvalidRequestException

Confirms that the client thread has the given Permission in the context of the given ColumnFamily and the current keyspace.

Throws:

org.apache.cassandra.thrift.InvalidRequestException

getTimestamp

public long getTimestamp()

This clock guarantees that updates from a given client will be ordered in the sequence seen, even if multiple updates happen in the same millisecond. This can be useful when a client wants to perform multiple updates to a single column.