org.apache.cassandra.db
Class SystemTable

java.lang.Object
  org.apache.cassandra.db.SystemTable

public class SystemTable
extends java.lang.Object

Field Summary

static java.lang.String	INDEX_CF
static java.lang.String	NODE_ID_CF
static java.lang.String	STATUS_CF

Constructor Summary

SystemTable()

Method Summary

static void	checkHealth() One of three things will happen if you try to read the system table: 1.
static NodeId	getCurrentLocalNodeId() Read the current local node id from the system table or null if no such node id is recorded.
static java.util.List<NodeId.NodeIdRecord>	getOldLocalNodeIds()
static Token	getSavedToken()
static int	incrementAndGetGeneration()
static boolean	isBootstrapped()
static boolean	isIndexBuilt(java.lang.String table, java.lang.String indexName)
static java.util.HashMap<Token,java.net.InetAddress>	loadTokens() Return a map of stored tokens to IP addresses
static void	purgeIncompatibleHints()
static void	removeToken(Token token) Remove stored token being used by another node
static void	setBootstrapped(boolean isBootstrapped)
static void	setIndexBuilt(java.lang.String table, java.lang.String indexName)
static void	setIndexRemoved(java.lang.String table, java.lang.String indexName)
static void	updateToken(java.net.InetAddress ep, Token token) Record token being used by another node
static void	updateToken(Token token) This method is used to update the System Table with the new token for this node
static void	writeCurrentLocalNodeId(NodeId oldNodeId, NodeId newNodeId, long now) Write a new current local node id to the system table.

Methods inherited from class java.lang.Object

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

Field Detail

STATUS_CF

public static final java.lang.String STATUS_CF

See Also:

Constant Field Values

INDEX_CF

public static final java.lang.String INDEX_CF

See Also:

Constant Field Values

NODE_ID_CF

public static final java.lang.String NODE_ID_CF

See Also:

Constant Field Values

Constructor Detail

SystemTable

public SystemTable()

Method Detail

purgeIncompatibleHints

public static void purgeIncompatibleHints()
                                   throws java.io.IOException

Throws:

java.io.IOException

updateToken

public static void updateToken(java.net.InetAddress ep,
                               Token token)

Record token being used by another node

removeToken

public static void removeToken(Token token)

Remove stored token being used by another node

updateToken

public static void updateToken(Token token)

This method is used to update the System Table with the new token for this node

loadTokens

public static java.util.HashMap<Token,java.net.InetAddress> loadTokens()

Return a map of stored tokens to IP addresses

checkHealth

public static void checkHealth()
                        throws ConfigurationException,
                               java.io.IOException

One of three things will happen if you try to read the system table: 1. files are present and you can read them: great 2. no files are there: great (new node is assumed) 3. files are present but you can't read them: bad (suspect that the partitioner was changed).

Throws:

ConfigurationException

java.io.IOException

getSavedToken

public static Token getSavedToken()

incrementAndGetGeneration

public static int incrementAndGetGeneration()
                                     throws java.io.IOException

Throws:

java.io.IOException

isBootstrapped

public static boolean isBootstrapped()

setBootstrapped

public static void setBootstrapped(boolean isBootstrapped)

isIndexBuilt

public static boolean isIndexBuilt(java.lang.String table,
                                   java.lang.String indexName)

setIndexBuilt

public static void setIndexBuilt(java.lang.String table,
                                 java.lang.String indexName)

setIndexRemoved

public static void setIndexRemoved(java.lang.String table,
                                   java.lang.String indexName)

getCurrentLocalNodeId

public static NodeId getCurrentLocalNodeId()

Read the current local node id from the system table or null if no such node id is recorded.

writeCurrentLocalNodeId

public static void writeCurrentLocalNodeId(NodeId oldNodeId,
                                           NodeId newNodeId,
                                           long now)

Write a new current local node id to the system table.

Parameters:

oldNodeId - the previous local node id (that newNodeId replace) or null if no such node id exists (new node or removed system table)

newNodeId - the new current local node id to record

getOldLocalNodeIds

public static java.util.List<NodeId.NodeIdRecord> getOldLocalNodeIds()