org.apache.hadoop.hbase.client

Class AsyncRegionServerCallable<T>

java.lang.Object

org.apache.hadoop.hbase.client.AsyncRegionServerCallable<T>

Type Parameters:

T - the class that the ServerCallable handles

All Implemented Interfaces:

AsyncRetryingCallable<T>

Direct Known Subclasses:

AsyncScannerCallable

@InterfaceAudience.Private
public abstract class AsyncRegionServerCallable<T>
extends java.lang.Object
implements AsyncRetryingCallable<T>

Implementations call a RegionServer and implement AsyncRetryingCallable.call(ResponseHandler). Passed to a RpcRetryingCaller so we retry on fail.

Field Summary

Fields

Modifier and Type	Field and Description
protected AsyncRpcClient	client
protected org.apache.hadoop.hbase.client.HConnection	connection
protected org.apache.hadoop.hbase.HRegionLocation	location
protected static int	MIN_WAIT_DEAD_SERVER
protected byte[]	row
protected org.apache.hadoop.hbase.TableName	tableName

Constructor Summary

Constructors

Constructor and Description
AsyncRegionServerCallable(AsyncRpcClient client, org.apache.hadoop.hbase.TableName tableName, byte[] row)

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	getExceptionMessageAdditionalDetail()
org.apache.hadoop.hbase.HRegionInfo	getHRegionInfo()
protected org.apache.hadoop.hbase.HRegionLocation	getLocation()
byte[]	getRow()
protected org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ClientService.Interface	getStub()
org.apache.hadoop.hbase.TableName	getTableName()
void	prepare(boolean reload) Prepare for connection to the server hosting region with row from tablename.
protected void	setLocation(org.apache.hadoop.hbase.HRegionLocation location)
long	sleep(long pause, int tries)
void	throwable(java.lang.Throwable t, boolean retrying) Called when AsyncRetryingCallable.call(ResponseHandler) throws an exception and we are going to retry; take action to make it so we succeed on next call (clear caches, do relookup of locations, etc.).

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hbase.client.AsyncRetryingCallable

call

Field Detail

connection

protected final org.apache.hadoop.hbase.client.HConnection connection

tableName

protected final org.apache.hadoop.hbase.TableName tableName

row

protected final byte[] row

client

protected final AsyncRpcClient client

location

protected org.apache.hadoop.hbase.HRegionLocation location

MIN_WAIT_DEAD_SERVER

protected static final int MIN_WAIT_DEAD_SERVER

See Also:

Constant Field Values

Constructor Detail

AsyncRegionServerCallable

public AsyncRegionServerCallable(AsyncRpcClient client,
                         org.apache.hadoop.hbase.TableName tableName,
                         byte[] row)

Parameters:

client - RPC client to use.

tableName - Table name to which row belongs.

row - The row we want in tableName.

Method Detail

prepare

public void prepare(boolean reload)
             throws java.io.IOException

Prepare for connection to the server hosting region with row from tablename. Does lookup to find region location and hosting server.

Specified by:

prepare in interface AsyncRetryingCallable<T>

Parameters:

reload - Set this to true if connection should re-find the region

Throws:

java.io.IOException - e

getStub

protected org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ClientService.Interface getStub()

getLocation

protected org.apache.hadoop.hbase.HRegionLocation getLocation()

setLocation

protected void setLocation(org.apache.hadoop.hbase.HRegionLocation location)

getTableName

public org.apache.hadoop.hbase.TableName getTableName()

getRow

public byte[] getRow()

throwable

public void throwable(java.lang.Throwable t,
             boolean retrying)

Description copied from interface: AsyncRetryingCallable

Called when AsyncRetryingCallable.call(ResponseHandler) throws an exception and we are going to retry; take action to make it so we succeed on next call (clear caches, do relookup of locations, etc.).

Specified by:

throwable in interface AsyncRetryingCallable<T>

retrying - True if we are in retrying mode (we are not in retrying mode when max retries == 1; we ARE in retrying mode if retries > 1 even when we are the last attempt)

getExceptionMessageAdditionalDetail

public java.lang.String getExceptionMessageAdditionalDetail()

Specified by:

getExceptionMessageAdditionalDetail in interface AsyncRetryingCallable<T>

Returns:

Some details from the implementation that we would like to add to a terminating exception; i.e. a fatal exception is being thrown ending retries and we might like to add more implementation-specific detail on to the exception being thrown.

sleep

public long sleep(long pause,
         int tries)

Specified by:

sleep in interface AsyncRetryingCallable<T>

Parameters:

pause - before retry

tries - count of tries

Returns:

Suggestion on how much to sleep between retries

getHRegionInfo

public org.apache.hadoop.hbase.HRegionInfo getHRegionInfo()

Returns:

the HRegionInfo for the current region