public class MetaScanner extends Object
.META.
table scanning logic
and uses a Retryable scanner. Provided visitors will be called
for each row.
Although public visibility, this is not a public-facing API and may evolve in
minor releases.
Note that during concurrent region splits, the scanner might not see
META changes across rows (for parent and daughter entries) consistently.
see HBASE-5986, and MetaScanner.BlockingMetaScannerVisitor
for details.
Modifier and Type | Class and Description |
---|---|
static class |
MetaScanner.BlockingMetaScannerVisitor
A MetaScannerVisitor that provides a consistent view of the table's
META entries during concurrent splits (see HBASE-5986 for details).
|
static interface |
MetaScanner.MetaScannerVisitor
Visitor class called to process each row of the .META.
|
static class |
MetaScanner.MetaScannerVisitorBase |
static class |
MetaScanner.TableMetaScannerVisitor
A MetaScannerVisitor for a table.
|
Constructor and Description |
---|
MetaScanner() |
Modifier and Type | Method and Description |
---|---|
static NavigableMap<HRegionInfo,ServerName> |
allTableRegions(org.apache.hadoop.conf.Configuration conf,
byte[] tablename,
boolean offlined)
Deprecated.
|
static NavigableMap<HRegionInfo,ServerName> |
allTableRegions(org.apache.hadoop.conf.Configuration conf,
HConnection connection,
byte[] tablename,
boolean offlined)
Lists all of the table regions currently in META.
|
static List<HRegionInfo> |
listAllRegions(org.apache.hadoop.conf.Configuration conf,
boolean offlined)
Used in tests.
|
static void |
metaScan(org.apache.hadoop.conf.Configuration configuration,
HConnection connection,
MetaScanner.MetaScannerVisitor visitor,
byte[] userTableName)
Scans the meta table and calls a visitor on each RowResult and uses a empty
start row value as table name.
|
static void |
metaScan(org.apache.hadoop.conf.Configuration configuration,
HConnection connection,
MetaScanner.MetaScannerVisitor visitor,
byte[] tableName,
byte[] row,
int rowLimit,
byte[] metaTableName)
Scans the meta table and calls a visitor on each RowResult.
|
static void |
metaScan(org.apache.hadoop.conf.Configuration configuration,
MetaScanner.MetaScannerVisitor visitor)
Scans the meta table and calls a visitor on each RowResult and uses a empty
start row value as table name.
|
static void |
metaScan(org.apache.hadoop.conf.Configuration configuration,
MetaScanner.MetaScannerVisitor visitor,
byte[] userTableName,
byte[] row,
int rowLimit)
Scans the meta table and calls a visitor on each RowResult.
|
public static void metaScan(org.apache.hadoop.conf.Configuration configuration, MetaScanner.MetaScannerVisitor visitor) throws IOException
configuration
- confvisitor
- A custom visitorIOException
- epublic static void metaScan(org.apache.hadoop.conf.Configuration configuration, HConnection connection, MetaScanner.MetaScannerVisitor visitor, byte[] userTableName) throws IOException
configuration
- confconnection
- connection to be used internally (null not allowed)visitor
- A custom visitorIOException
- epublic static void metaScan(org.apache.hadoop.conf.Configuration configuration, MetaScanner.MetaScannerVisitor visitor, byte[] userTableName, byte[] row, int rowLimit) throws IOException
rowLimit
of rows.configuration
- HBase configuration.visitor
- Visitor object.userTableName
- User table name in meta table to start scan at. Pass
null if not interested in a particular table.row
- Name of the row at the user table. The scan will start from
the region row where the row resides.rowLimit
- Max of processed rows. If it is less than 0, it
will be set to default value Integer.MAX_VALUE
.IOException
- epublic static void metaScan(org.apache.hadoop.conf.Configuration configuration, HConnection connection, MetaScanner.MetaScannerVisitor visitor, byte[] tableName, byte[] row, int rowLimit, byte[] metaTableName) throws IOException
rowLimit
of rows.configuration
- HBase configuration.connection
- connection to be used internally (null not allowed)visitor
- Visitor object. Closes the visitor before returning.tableName
- User table name in meta table to start scan at. Pass
null if not interested in a particular table.row
- Name of the row at the user table. The scan will start from
the region row where the row resides.rowLimit
- Max of processed rows. If it is less than 0, it
will be set to default value Integer.MAX_VALUE
.metaTableName
- Meta table to scan, root or meta.IOException
- epublic static List<HRegionInfo> listAllRegions(org.apache.hadoop.conf.Configuration conf, boolean offlined) throws IOException
conf
- offlined
- True if we are to include offlined regions, false and we'll
leave out offlined regions from returned list.IOException
@Deprecated public static NavigableMap<HRegionInfo,ServerName> allTableRegions(org.apache.hadoop.conf.Configuration conf, byte[] tablename, boolean offlined) throws IOException
conf
- connection
- connection to be used internally (null to create a new connection)offlined
- True if we are to include offlined regions, false and we'll
leave out offlined regions from returned list.IOException
public static NavigableMap<HRegionInfo,ServerName> allTableRegions(org.apache.hadoop.conf.Configuration conf, HConnection connection, byte[] tablename, boolean offlined) throws IOException
conf
- connection
- connection to be used internally (null to create a new connection)offlined
- True if we are to include offlined regions, false and we'll
leave out offlined regions from returned list.IOException
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