Package org.apache.iotdb.db.metadata.tag

Class TagLogFile

java.lang.Object

org.apache.iotdb.db.metadata.tag.TagLogFile

All Implemented Interfaces:

java.lang.AutoCloseable

public class TagLogFile
extends java.lang.Object
implements java.lang.AutoCloseable

Constructor Summary

Constructors

Constructor	Description
TagLogFile(java.lang.String schemaDir, java.lang.String logFileName)

Method Summary

Modifier and Type	Method	Description
void	close()
void	copyTo(java.io.File targetFile)
org.apache.iotdb.tsfile.utils.Pair<java.util.Map<java.lang.String,java.lang.String>,java.util.Map<java.lang.String,java.lang.String>>	read(int size, long position)
java.util.Map<java.lang.String,java.lang.String>	readTag(int size, long position)
long	write(java.util.Map<java.lang.String,java.lang.String> tagMap, java.util.Map<java.lang.String,java.lang.String> attributeMap)
void	write(java.util.Map<java.lang.String,java.lang.String> tagMap, java.util.Map<java.lang.String,java.lang.String> attributeMap, long position)	This method does not modify this file's current position.

Methods inherited from class java.lang.Object

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

Constructor Detail

TagLogFile

public TagLogFile(java.lang.String schemaDir,
                  java.lang.String logFileName)
           throws java.io.IOException

Throws:

java.io.IOException

Method Detail

copyTo

public void copyTo(java.io.File targetFile)
            throws java.io.IOException

Throws:

java.io.IOException

read

public org.apache.iotdb.tsfile.utils.Pair<java.util.Map<java.lang.String,java.lang.String>,java.util.Map<java.lang.String,java.lang.String>> read(int size,
                                                                                                                                                                    long position)
                                                                                                                                                             throws java.io.IOException

Returns:

tags map, attributes map

Throws:

java.io.IOException

readTag

public java.util.Map<java.lang.String,java.lang.String> readTag(int size,
                                                                      long position)
                                                               throws java.io.IOException

Throws:

java.io.IOException

write

public long write(java.util.Map<java.lang.String,java.lang.String> tagMap,
                  java.util.Map<java.lang.String,java.lang.String> attributeMap)
           throws java.io.IOException,
                  org.apache.iotdb.commons.exception.MetadataException

Throws:

java.io.IOException

org.apache.iotdb.commons.exception.MetadataException

write

public void write(java.util.Map<java.lang.String,java.lang.String> tagMap,
                  java.util.Map<java.lang.String,java.lang.String> attributeMap,
                  long position)
           throws java.io.IOException,
                  org.apache.iotdb.commons.exception.MetadataException

This method does not modify this file's current position.

Throws:

java.io.IOException

org.apache.iotdb.commons.exception.MetadataException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.lang.AutoCloseable

Throws:

java.io.IOException