Package org.apache.cassandra.db.virtual

Class LogMessagesTable

java.lang.Object

org.apache.cassandra.db.virtual.AbstractVirtualTable

org.apache.cassandra.db.virtual.AbstractMutableVirtualTable

org.apache.cassandra.db.virtual.LogMessagesTable

All Implemented Interfaces:

VirtualTable

public final class LogMessagesTable
extends AbstractMutableVirtualTable

Virtual table for holding Cassandra logs. Entries to this table are added via log appender.

The virtual table is bounded in its size. If a new log message is appended to virtual table, the oldest one is removed.

This virtual table can be truncated.

This table does not enable ALLOW FILTERING implicitly.

See Also:

• CASSANDRA-18238
• VirtualTableAppender

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	LogMessagesTable.LogMessage

Nested classes/interfaces inherited from class org.apache.cassandra.db.virtual.AbstractMutableVirtualTable

AbstractMutableVirtualTable.ColumnValue, AbstractMutableVirtualTable.ColumnValues

Nested classes/interfaces inherited from class org.apache.cassandra.db.virtual.AbstractVirtualTable

AbstractVirtualTable.AbstractDataSet, AbstractVirtualTable.DataSet, AbstractVirtualTable.Partition, AbstractVirtualTable.SimpleTable

Field Summary

Fields

Modifier and Type	Field	Description
static final String	LEVEL_COLUMN_NAME
static final String	LOGGER_COLUMN_NAME
static final int	LOGS_VIRTUAL_TABLE_DEFAULT_ROWS
static final int	LOGS_VIRTUAL_TABLE_MAX_ROWS
static final int	LOGS_VIRTUAL_TABLE_MIN_ROWS
static final String	MESSAGE_COLUMN_NAME
static final String	ORDER_IN_MILLISECOND_COLUMN_NAME
static final String	TABLE_NAME
static final String	TIMESTAMP_COLUMN_NAME

Fields inherited from class org.apache.cassandra.db.virtual.AbstractVirtualTable

metadata

Method Summary

Modifier and Type	Method	Description
void	add(ch.qos.logback.classic.spi.LoggingEvent event)
boolean	allowFilteringImplicitly()	Tells whether ALLOW FILTERING is implicitly added to select statement which requires it.
AbstractVirtualTable.DataSet	data()	Provide a AbstractVirtualTable.DataSet that is contains all of the virtual table's data.
void	truncate()	Truncates data from the underlying source, if supported.

Methods inherited from class org.apache.cassandra.db.virtual.AbstractMutableVirtualTable

apply, applyColumnDeletion, applyColumnUpdate, applyPartitionDeletion, applyRangeTombstone, applyRowDeletion

Methods inherited from class org.apache.cassandra.db.virtual.AbstractVirtualTable

data, metadata, select, select, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.db.virtual.VirtualTable

name

Field Details

LOGS_VIRTUAL_TABLE_MIN_ROWS

public static final int LOGS_VIRTUAL_TABLE_MIN_ROWS

See Also:

• Constant Field Values

LOGS_VIRTUAL_TABLE_DEFAULT_ROWS

public static final int LOGS_VIRTUAL_TABLE_DEFAULT_ROWS

See Also:

• Constant Field Values

LOGS_VIRTUAL_TABLE_MAX_ROWS

public static final int LOGS_VIRTUAL_TABLE_MAX_ROWS

See Also:

• Constant Field Values

TABLE_NAME

public static final String TABLE_NAME

See Also:

• Constant Field Values

TIMESTAMP_COLUMN_NAME

public static final String TIMESTAMP_COLUMN_NAME

See Also:

• Constant Field Values

LOGGER_COLUMN_NAME

public static final String LOGGER_COLUMN_NAME

See Also:

• Constant Field Values

ORDER_IN_MILLISECOND_COLUMN_NAME

public static final String ORDER_IN_MILLISECOND_COLUMN_NAME

See Also:

• Constant Field Values

LEVEL_COLUMN_NAME

public static final String LEVEL_COLUMN_NAME

See Also:

• Constant Field Values

MESSAGE_COLUMN_NAME

public static final String MESSAGE_COLUMN_NAME

See Also:

• Constant Field Values

Method Details

data

public AbstractVirtualTable.DataSet data()

Description copied from class: AbstractVirtualTable

Provide a AbstractVirtualTable.DataSet that is contains all of the virtual table's data.

Specified by:

data in class AbstractVirtualTable

add

public void add(ch.qos.logback.classic.spi.LoggingEvent event)

truncate

public void truncate()

Description copied from interface: VirtualTable

Truncates data from the underlying source, if supported.

Specified by:

truncate in interface VirtualTable

Overrides:

truncate in class AbstractVirtualTable

allowFilteringImplicitly

public boolean allowFilteringImplicitly()

Description copied from interface: VirtualTable

Tells whether ALLOW FILTERING is implicitly added to select statement which requires it. Defaults to true.

Returns:

true if ALLOW FILTERING is implicitly added to select statements when required, false otherwise.