Package org.apache.iotdb.db.metadata.cache

Class DataNodeSchemaCache

java.lang.Object

org.apache.iotdb.db.metadata.cache.DataNodeSchemaCache

public class DataNodeSchemaCache
extends java.lang.Object

This class takes the responsibility of metadata cache management of all DataRegions under StorageEngine

Method Summary

Modifier and Type	Method	Description
void	cleanUp()
long	estimatedSize()
ClusterSchemaTree	get(org.apache.iotdb.commons.path.PartialPath devicePath, java.lang.String[] measurements)	Get SchemaEntity info without auto create schema
static DataNodeSchemaCache	getInstance()
org.apache.iotdb.tsfile.read.TimeValuePair	getLastCache(org.apache.iotdb.commons.path.PartialPath seriesPath)
void	invalidate(org.apache.iotdb.commons.path.PartialPath partialPath)	For delete timeseries meatadata cache operation
void	put(ISchemaTree schemaTree)
void	resetLastCache(org.apache.iotdb.commons.path.PartialPath seriesPath)
void	updateLastCache(org.apache.iotdb.commons.path.PartialPath seriesPath, org.apache.iotdb.tsfile.read.TimeValuePair timeValuePair, boolean highPriorityUpdate, java.lang.Long latestFlushedTime)	get SchemaCacheEntry and update last cache
void	updateLastCache(MeasurementPath measurementPath, org.apache.iotdb.tsfile.read.TimeValuePair timeValuePair, boolean highPriorityUpdate, java.lang.Long latestFlushedTime)	get or create SchemaCacheEntry and update last cache, only support non-aligned sensor or aligned sensor without only one sub sensor

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static DataNodeSchemaCache getInstance()

get

public ClusterSchemaTree get(org.apache.iotdb.commons.path.PartialPath devicePath,
                             java.lang.String[] measurements)

Get SchemaEntity info without auto create schema

Parameters:

devicePath - should not be measurementPath or AlignedPath

measurements -

Returns:

timeseries partialPath and its SchemaEntity

put

public void put(ISchemaTree schemaTree)

getLastCache

public org.apache.iotdb.tsfile.read.TimeValuePair getLastCache(org.apache.iotdb.commons.path.PartialPath seriesPath)

updateLastCache

public void updateLastCache(org.apache.iotdb.commons.path.PartialPath seriesPath,
                            org.apache.iotdb.tsfile.read.TimeValuePair timeValuePair,
                            boolean highPriorityUpdate,
                            java.lang.Long latestFlushedTime)

get SchemaCacheEntry and update last cache

updateLastCache

public void updateLastCache(MeasurementPath measurementPath,
                            org.apache.iotdb.tsfile.read.TimeValuePair timeValuePair,
                            boolean highPriorityUpdate,
                            java.lang.Long latestFlushedTime)

get or create SchemaCacheEntry and update last cache, only support non-aligned sensor or aligned sensor without only one sub sensor

resetLastCache

public void resetLastCache(org.apache.iotdb.commons.path.PartialPath seriesPath)

invalidate

public void invalidate(org.apache.iotdb.commons.path.PartialPath partialPath)

For delete timeseries meatadata cache operation

Parameters:

partialPath -

estimatedSize

public long estimatedSize()

cleanUp

public void cleanUp()