org.apache.accumulo.tserver.log

Class DfsLogger

java.lang.Object

org.apache.accumulo.tserver.log.DfsLogger

public class DfsLogger
extends Object

Wrap a connection to a logger.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DfsLogger.DFSLoggerInputStreams
static class	DfsLogger.LogClosedException
static class	DfsLogger.LogHeaderIncompleteException A well-timed tabletserver failure could result in an incomplete header written to a write-ahead log.
static interface	DfsLogger.ServerResources

Field Summary

Fields

Modifier and Type	Field and Description
static String	LOG_FILE_HEADER_V2
static String	LOG_FILE_HEADER_V3

Constructor Summary

Constructors

Constructor and Description
DfsLogger(DfsLogger.ServerResources conf, AtomicLong syncCounter, AtomicLong flushCounter)
DfsLogger(DfsLogger.ServerResources conf, String filename, String meta) Reference a pre-existing log file.

Method Summary

Modifier and Type	Method and Description
void	close()
void	defineTablet(long seq, int tid, KeyExtent tablet)
boolean	equals(Object obj)
String	getFileName()
String	getLogger()
String	getMeta() get the cq needed to reference this logger's entry in +r/!0
int	hashCode()
org.apache.accumulo.tserver.log.DfsLogger.LoggerOperation	log(long seq, int tid, Mutation mutation, Durability durability)
org.apache.accumulo.tserver.log.DfsLogger.LoggerOperation	logManyTablets(List<TabletMutations> mutations)
org.apache.accumulo.tserver.log.DfsLogger.LoggerOperation	minorCompactionFinished(long seq, int tid, String fqfn, Durability durability)
org.apache.accumulo.tserver.log.DfsLogger.LoggerOperation	minorCompactionStarted(long seq, int tid, String fqfn, Durability durability)
void	open(String address)
static DfsLogger.DFSLoggerInputStreams	readHeaderAndReturnStream(org.apache.hadoop.fs.FSDataInputStream input, AccumuloConfiguration conf)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

LOG_FILE_HEADER_V2

public static final String LOG_FILE_HEADER_V2

See Also:

Constant Field Values

LOG_FILE_HEADER_V3

public static final String LOG_FILE_HEADER_V3

See Also:

Constant Field Values

Constructor Detail

DfsLogger

public DfsLogger(DfsLogger.ServerResources conf,
                 AtomicLong syncCounter,
                 AtomicLong flushCounter)
          throws IOException

Throws:

IOException

DfsLogger

public DfsLogger(DfsLogger.ServerResources conf,
                 String filename,
                 String meta)
          throws IOException

Reference a pre-existing log file.

Parameters:

meta - the cq for the "log" entry in +r/!0

Throws:

IOException

Method Detail

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

readHeaderAndReturnStream

public static DfsLogger.DFSLoggerInputStreams readHeaderAndReturnStream(org.apache.hadoop.fs.FSDataInputStream input,
                                                                        AccumuloConfiguration conf)
                                                                 throws IOException

Throws:

IOException

open

public void open(String address)
          throws IOException

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object

getMeta

public String getMeta()

get the cq needed to reference this logger's entry in +r/!0

getFileName

public String getFileName()

close

public void close()
           throws IOException

Throws:

IOException

defineTablet

public void defineTablet(long seq,
                         int tid,
                         KeyExtent tablet)
                  throws IOException

Throws:

IOException

log

public org.apache.accumulo.tserver.log.DfsLogger.LoggerOperation log(long seq,
                                                                     int tid,
                                                                     Mutation mutation,
                                                                     Durability durability)
                                                              throws IOException

Throws:

IOException

logManyTablets

public org.apache.accumulo.tserver.log.DfsLogger.LoggerOperation logManyTablets(List<TabletMutations> mutations)
                                                                         throws IOException

Throws:

IOException

minorCompactionFinished

public org.apache.accumulo.tserver.log.DfsLogger.LoggerOperation minorCompactionFinished(long seq,
                                                                                         int tid,
                                                                                         String fqfn,
                                                                                         Durability durability)
                                                                                  throws IOException

Throws:

IOException

minorCompactionStarted

public org.apache.accumulo.tserver.log.DfsLogger.LoggerOperation minorCompactionStarted(long seq,
                                                                                        int tid,
                                                                                        String fqfn,
                                                                                        Durability durability)
                                                                                 throws IOException

Throws:

IOException

getLogger

public String getLogger()