com.netflix.priam.connection

Class CassandraOperations

java.lang.Object

com.netflix.priam.connection.CassandraOperations

All Implemented Interfaces:

ICassandraOperations

public class CassandraOperations
extends java.lang.Object
implements ICassandraOperations

This class encapsulates interactions with Cassandra. Created by aagrawal on 6/19/18.

Method Summary

Modifier and Type	Method and Description
void	clearSnapshot(java.lang.String snapshotTag) Clear the snapshot tag from disk.
void	forceKeyspaceCompaction(java.lang.String keyspaceName, java.lang.String... columnfamilies)
void	forceKeyspaceFlush(java.lang.String keyspaceName)
java.util.Map<java.lang.String,java.util.List<java.lang.String>>	getColumnfamilies()
java.util.List<java.lang.String>	getKeyspaces() Get all the keyspaces existing on this node.
java.util.List<java.util.Map<java.lang.String,java.lang.String>>	gossipInfo()
void	takeSnapshot(java.lang.String snapshotName) This method neds to be synchronized.

Methods inherited from class java.lang.Object

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

Method Detail

takeSnapshot

public void takeSnapshot(java.lang.String snapshotName)
                  throws java.lang.Exception

Description copied from interface: ICassandraOperations

This method neds to be synchronized. Context: During the transition phase to backup version 2.0, we might be executing multiple snapshots at the same time. To avoid, unknown behavior by Cassandra, it is wise to keep this method sync. Also, with backups being on CRON, we don't know how often operator is taking snapshot.

Specified by:

takeSnapshot in interface ICassandraOperations

Parameters:

snapshotName - Name of the snapshot on disk. This snapshotName should be UNIQUE among all the snapshots. Try to append UUID to snapshotName to ensure uniqueness. This is to ensure a) Snapshot fails if name are not unique. b) You might take snapshots which are not "part" of same snapshot. e.g. Any leftovers from previous operation. c) Once snapshot fails, this will clean the failed snapshot.

Throws:

java.lang.Exception - in case of error while taking a snapshot by Cassandra.

clearSnapshot

public void clearSnapshot(java.lang.String snapshotTag)
                   throws java.lang.Exception

Description copied from interface: ICassandraOperations

Clear the snapshot tag from disk.

Specified by:

clearSnapshot in interface ICassandraOperations

Parameters:

snapshotTag - Name of the snapshot to be removed.

Throws:

java.lang.Exception - in case of error while clearing a snapshot.

getKeyspaces

public java.util.List<java.lang.String> getKeyspaces()
                                              throws java.lang.Exception

Description copied from interface: ICassandraOperations

Get all the keyspaces existing on this node.

Specified by:

getKeyspaces in interface ICassandraOperations

Returns:

List of keyspace names.

Throws:

java.lang.Exception - in case of reaching to JMX endpoint.

getColumnfamilies

public java.util.Map<java.lang.String,java.util.List<java.lang.String>> getColumnfamilies()
                                                                                   throws java.lang.Exception

Specified by:

getColumnfamilies in interface ICassandraOperations

Throws:

java.lang.Exception

forceKeyspaceCompaction

public void forceKeyspaceCompaction(java.lang.String keyspaceName,
                                    java.lang.String... columnfamilies)
                             throws java.lang.Exception

Specified by:

forceKeyspaceCompaction in interface ICassandraOperations

Throws:

java.lang.Exception

forceKeyspaceFlush

public void forceKeyspaceFlush(java.lang.String keyspaceName)
                        throws java.lang.Exception

Specified by:

forceKeyspaceFlush in interface ICassandraOperations

Throws:

java.lang.Exception

gossipInfo

public java.util.List<java.util.Map<java.lang.String,java.lang.String>> gossipInfo()
                                                                            throws java.lang.Exception

Specified by:

gossipInfo in interface ICassandraOperations

Throws:

java.lang.Exception