com.datastax.driver.core

Class MetadataBridge

java.lang.Object

com.datastax.driver.core.MetadataBridge

public class MetadataBridge
extends Object

The MetadataBridge class is used to access protected methods of the Metadata.

Since:

1.0

Version:

1 - Jan 21, 2016 - paouelle - Creation

Author:

The Helenus Driver Project Authors

Copyright:

2015-2017 The Helenus Driver Project Authors

Constructor Summary

Constructors

Constructor and Description
MetadataBridge()

Method Summary

Modifier and Type	Method and Description
static String	escapeId(String id) Escape a CQL3 identifier based on its value as read from the schema tables.
static int	getNumHosts(com.datastax.driver.core.Metadata mdata) Gets the number of known hosts of the cluster based on its meta data.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetadataBridge

public MetadataBridge()

Method Detail

getNumHosts

public static int getNumHosts(com.datastax.driver.core.Metadata mdata)

Gets the number of known hosts of the cluster based on its meta data.

Note: The implementation here avoids creating a temporary read-only collection.

Parameters:

mdata - the meta data for the cluster

Returns:

the number of known hosts in the cluster

escapeId

public static String escapeId(String id)

Escape a CQL3 identifier based on its value as read from the schema tables. Because it comes from Cassandra, we could just always quote it, but to get a nicer output we don't do it if it's not necessary.

Parameters:

id - the identifier to escape

Returns:

the escaped identifier