Package org.apache.hadoop.hdfs.rbfbalance

Class MountTableProcedure

java.lang.Object

org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure

org.apache.hadoop.hdfs.rbfbalance.MountTableProcedure

All Implemented Interfaces:

org.apache.hadoop.io.Writable

public class MountTableProcedure
extends org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure

Update mount table. Old mount table: /a/b/c -> {ns:src path:/a/b/c} New mount table: /a/b/c -> {ns:dst path:/a/b/c}

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure

org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure.RetryException

Field Summary

Fields inherited from class org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure

LOG

Constructor Summary

Constructors

Constructor	Description
MountTableProcedure()
MountTableProcedure(java.lang.String name, java.lang.String nextProcedure, long delayDuration, java.lang.String mount, java.lang.String dstPath, java.lang.String dstNs, org.apache.hadoop.conf.Configuration conf)	Update mount entry to specified dst uri.

Method Summary

Modifier and Type	Method	Description
boolean	execute()
static MountTable	getMountEntry(java.lang.String mount, MountTableManager mountTable)	Gets the mount table entry.
void	readFields(java.io.DataInput in)
void	write(java.io.DataOutput out)

Methods inherited from class org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure

delayMillisBeforeRetry, equals, hashCode, isSchedulerShutdown, name, nextProcedure, setNextProcedure, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MountTableProcedure

public MountTableProcedure()

MountTableProcedure

public MountTableProcedure(java.lang.String name,
                           java.lang.String nextProcedure,
                           long delayDuration,
                           java.lang.String mount,
                           java.lang.String dstPath,
                           java.lang.String dstNs,
                           org.apache.hadoop.conf.Configuration conf)

Update mount entry to specified dst uri.

Parameters:

name - the name of the procedure.

nextProcedure - the name of the next procedure.

delayDuration - the delay duration when this procedure is delayed.

mount - the mount entry to be updated.

dstPath - the sub-cluster uri of the dst path.

dstNs - the destination sub-cluster name service id.

conf - the configuration.

Method Detail

execute

public boolean execute()
                throws org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure.RetryException,
                       java.io.IOException

Specified by:

execute in class org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure

Throws:

org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure.RetryException

java.io.IOException

getMountEntry

public static MountTable getMountEntry(java.lang.String mount,
                                       MountTableManager mountTable)
                                throws java.io.IOException

Gets the mount table entry.

Parameters:

mount - name of the mount entry.

mountTable - the mount table.

Returns:

corresponding mount entry.

Throws:

java.io.IOException - in case of failure to retrieve mount entry.

write

public void write(java.io.DataOutput out)
           throws java.io.IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Overrides:

write in class org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure

Throws:

java.io.IOException

readFields

public void readFields(java.io.DataInput in)
                throws java.io.IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Overrides:

readFields in class org.apache.hadoop.tools.fedbalance.procedure.BalanceProcedure

Throws:

java.io.IOException