org.apache.hadoop.hive.common
Class ValidTxnListImpl

java.lang.Object
  org.apache.hadoop.hive.common.ValidTxnListImpl

All Implemented Interfaces:

ValidTxnList

public class ValidTxnListImpl
extends Object
implements ValidTxnList

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hive.common.ValidTxnList

ValidTxnList.RangeResponse

Field Summary

Fields inherited from interface org.apache.hadoop.hive.common.ValidTxnList

VALID_TXNS_KEY

Constructor Summary

ValidTxnListImpl()

ValidTxnListImpl(long[] exceptions, long highWatermark)

ValidTxnListImpl(String value)

Method Summary

long	getHighWatermark() Get the largest committed transaction id.
long[]	getOpenTransactions() Get the list of transactions under the high water mark that are still open.
boolean	isTxnCommitted(long txnid) Indicates whether a given transaction has been committed and should be viewed as valid for read.
ValidTxnList.RangeResponse	isTxnRangeCommitted(long minTxnId, long maxTxnId) Find out if a range of transaction ids have been committed.
void	readFromString(String src) Populate this validTxnList from the string.
String	toString()
String	writeToString() Write this validTxnList into a string.

Methods inherited from class java.lang.Object

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

Constructor Detail

ValidTxnListImpl

public ValidTxnListImpl()

ValidTxnListImpl

public ValidTxnListImpl(long[] exceptions,
                        long highWatermark)

ValidTxnListImpl

public ValidTxnListImpl(String value)

Method Detail

isTxnCommitted

public boolean isTxnCommitted(long txnid)

Description copied from interface: ValidTxnList

Indicates whether a given transaction has been committed and should be viewed as valid for read.

Specified by:

isTxnCommitted in interface ValidTxnList

Parameters:

txnid - id for the transaction

Returns:

true if committed, false otherwise

isTxnRangeCommitted

public ValidTxnList.RangeResponse isTxnRangeCommitted(long minTxnId,
                                                      long maxTxnId)

Description copied from interface: ValidTxnList

Find out if a range of transaction ids have been committed.

Specified by:

isTxnRangeCommitted in interface ValidTxnList

Parameters:

minTxnId - minimum txnid to look for, inclusive

maxTxnId - maximum txnid to look for, inclusive

Returns:

Indicate whether none, some, or all of these transactions have been committed.

toString

public String toString()

Overrides:

toString in class Object

writeToString

public String writeToString()

Description copied from interface: ValidTxnList

Write this validTxnList into a string. This should produce a string that can be used by ValidTxnList.readFromString(String) to populate a validTxnsList.

Specified by:

writeToString in interface ValidTxnList

readFromString

public void readFromString(String src)

Description copied from interface: ValidTxnList

Populate this validTxnList from the string. It is assumed that the string was created via ValidTxnList.writeToString().

Specified by:

readFromString in interface ValidTxnList

Parameters:

src - source string.

getHighWatermark

public long getHighWatermark()

Description copied from interface: ValidTxnList

Get the largest committed transaction id.

Specified by:

getHighWatermark in interface ValidTxnList

Returns:

largest committed transaction id

getOpenTransactions

public long[] getOpenTransactions()

Description copied from interface: ValidTxnList

Get the list of transactions under the high water mark that are still open.

Specified by:

getOpenTransactions in interface ValidTxnList

Returns:

a list of open transaction ids