Package org.apache.iotdb.db.metadata.mtree.store.disk.schemafile

Interface ISchemaFile

All Known Implementing Classes:

MockSchemaFile, SchemaFile

public interface ISchemaFile

Method Summary

Modifier and Type	Method	Description
void	clear()
void	close()
void	delete(IMNode node)
IMNode	getChildNode(IMNode parent, java.lang.String childName)
java.util.Iterator<IMNode>	getChildren(IMNode parent)
IMNode	init()	Get the storage group node, with its segment address of 0.
void	sync()
boolean	updateStorageGroupNode(IStorageGroupMNode sgNode)	Modify header of schema file corresponding to the storage group node synchronously
void	writeMNode(IMNode node)	Only storage group node along with its descendents could be flushed into schema file.

Method Detail

init

IMNode init()
     throws org.apache.iotdb.commons.exception.MetadataException

Get the storage group node, with its segment address of 0.

Returns:

node instance, template name as hash code

Throws:

org.apache.iotdb.commons.exception.MetadataException

updateStorageGroupNode

boolean updateStorageGroupNode(IStorageGroupMNode sgNode)
                        throws java.io.IOException

Modify header of schema file corresponding to the storage group node synchronously

Parameters:

sgNode - node to be updated

Returns:

true if success

Throws:

java.io.IOException

writeMNode

void writeMNode(IMNode node)
         throws org.apache.iotdb.commons.exception.MetadataException,
                java.io.IOException

Only storage group node along with its descendents could be flushed into schema file.

Parameters:

node -

Throws:

org.apache.iotdb.commons.exception.MetadataException

java.io.IOException

delete

void delete(IMNode node)
     throws java.io.IOException,
            org.apache.iotdb.commons.exception.MetadataException

Throws:

java.io.IOException

org.apache.iotdb.commons.exception.MetadataException

close

void close()
    throws java.io.IOException

Throws:

java.io.IOException

clear

void clear()
    throws java.io.IOException,
           org.apache.iotdb.commons.exception.MetadataException

Throws:

java.io.IOException

org.apache.iotdb.commons.exception.MetadataException

sync

void sync()
   throws java.io.IOException

Throws:

java.io.IOException

getChildNode

IMNode getChildNode(IMNode parent,
                    java.lang.String childName)
             throws org.apache.iotdb.commons.exception.MetadataException,
                    java.io.IOException

Throws:

org.apache.iotdb.commons.exception.MetadataException

java.io.IOException

getChildren

java.util.Iterator<IMNode> getChildren(IMNode parent)
                                throws org.apache.iotdb.commons.exception.MetadataException,
                                       java.io.IOException

Throws:

org.apache.iotdb.commons.exception.MetadataException

java.io.IOException