org.apache.hadoop.hbase.master.handler

Class CreateTableHandler

java.lang.Object

org.apache.hadoop.hbase.executor.EventHandler

org.apache.hadoop.hbase.master.handler.CreateTableHandler

All Implemented Interfaces:

Comparable<Runnable>, Runnable

Direct Known Subclasses:

CloneSnapshotHandler

@InterfaceAudience.Private
public class CreateTableHandler
extends EventHandler

Handler to create a table.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.executor.EventHandler

EventHandler.EventHandlerListener

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.hadoop.conf.Configuration	conf
protected MasterFileSystem	fileSystemManager
protected HTableDescriptor	hTableDescriptor

Fields inherited from class org.apache.hadoop.hbase.executor.EventHandler

eventType, seqids, server, waitingTimeForEvents

Constructor Summary

Constructors

Constructor and Description
CreateTableHandler(Server server, MasterFileSystem fileSystemManager, HTableDescriptor hTableDescriptor, org.apache.hadoop.conf.Configuration conf, HRegionInfo[] newRegions, MasterServices masterServices)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addRegionsToMeta(List<HRegionInfo> regionInfos, int regionReplication) Add the specified set of regions to the hbase:meta table.
protected List<HRegionInfo>	addReplicas(HTableDescriptor hTableDescriptor, List<HRegionInfo> regions) Create any replicas for the regions (the default replicas that was already created is passed to the method)
protected void	completed(Throwable exception) Called after that process() is completed.
protected List<HRegionInfo>	handleCreateHdfsRegions(org.apache.hadoop.fs.Path tableRootDir, TableName tableName) Create the on-disk structure for the table, and returns the regions info.
CreateTableHandler	prepare() Event handlers should do all the necessary checks in this method (rather than in the constructor, or in process()) so that the caller, which is mostly executed in the ipc context can fail fast.
void	process() This method is the main processing loop to be implemented by the various subclasses.
String	toString()

Methods inherited from class org.apache.hadoop.hbase.executor.EventHandler

compareTo, getEventType, getInformativeName, getListener, getPriority, getSeqid, handleException, run, setListener

Methods inherited from class java.lang.Object

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

Field Detail

fileSystemManager

protected final MasterFileSystem fileSystemManager

hTableDescriptor

protected final HTableDescriptor hTableDescriptor

conf

protected final org.apache.hadoop.conf.Configuration conf

Constructor Detail

CreateTableHandler

public CreateTableHandler(Server server,
                  MasterFileSystem fileSystemManager,
                  HTableDescriptor hTableDescriptor,
                  org.apache.hadoop.conf.Configuration conf,
                  HRegionInfo[] newRegions,
                  MasterServices masterServices)

Method Detail

prepare

public CreateTableHandler prepare()
                           throws NotAllMetaRegionsOnlineException,
                                  TableExistsException,
                                  IOException

Description copied from class: EventHandler

Event handlers should do all the necessary checks in this method (rather than in the constructor, or in process()) so that the caller, which is mostly executed in the ipc context can fail fast. Process is executed async from the client ipc, so this method gives a quick chance to do some basic checks. Should be called after constructing the EventHandler, and before process().

Overrides:

prepare in class EventHandler

Returns:

the instance of this class

Throws:

NotAllMetaRegionsOnlineException

TableExistsException

IOException

toString

public String toString()

Overrides:

toString in class EventHandler

process

public void process()

Description copied from class: EventHandler

This method is the main processing loop to be implemented by the various subclasses.

Specified by:

process in class EventHandler

completed

protected void completed(Throwable exception)

Called after that process() is completed.

Parameters:

exception - null if process() is successful or not null if something has failed.

addReplicas

protected List<HRegionInfo> addReplicas(HTableDescriptor hTableDescriptor,
                            List<HRegionInfo> regions)

Create any replicas for the regions (the default replicas that was already created is passed to the method)

Parameters:

hTableDescriptor -

regions - default replicas

Returns:

the combined list of default and non-default replicas

handleCreateHdfsRegions

protected List<HRegionInfo> handleCreateHdfsRegions(org.apache.hadoop.fs.Path tableRootDir,
                                        TableName tableName)
                                             throws IOException

Create the on-disk structure for the table, and returns the regions info.

Parameters:

tableRootDir - directory where the table is being created

tableName - name of the table under construction

Returns:

the list of regions created

Throws:

IOException

addRegionsToMeta

protected void addRegionsToMeta(List<HRegionInfo> regionInfos,
                    int regionReplication)
                         throws IOException

Add the specified set of regions to the hbase:meta table.

Throws:

IOException