Canary (Hortonworks Data Platform Apache HBase Java API Reference)

```
public final class Canary
extends Object
```
HBase Canary Tool, that that can be used to do "canary monitoring" of a running HBase cluster. Here are two modes 1. region mode - Foreach region tries to get one row per column family and outputs some information about failure or latency. 2. regionserver mode - Foreach regionserver tries to get one row from one table selected randomly and outputs some information about failure or latency.

Nested Classes
Modifier and Type	Class and Description
`static interface`	`Canary.ExtendedSink`
`static class`	`Canary.Monitor`
`static class`	`Canary.RegionServerStdOutSink`
`static interface`	`Canary.Sink`
`static class`	`Canary.StdOutSink`

Constructors
Constructor and Description
`Canary()`
`Canary(Canary.Sink sink)`

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Configuration`	`getConf()`
`static void`	`main(String[] args)`
`Canary.Monitor`	`newMonitor(Connection connection, int index, String[] args)` A Factory method for `Canary.Monitor`.
`int`	`run(String[] args)`
`void`	`setConf(Configuration conf)`
`static void`	`sniff(Admin admin, TableName tableName)` Canary entry point for specified table.

public void setConf(Configuration conf)

public int run(String[] args)
        throws Exception

public Canary.Monitor newMonitor(Connection connection,
                                 int index,
                                 String[] args)

A Factory method for Canary.Monitor. Can be overridden by user.

Parameters:: index - a start index for monitor target; args - args passed from user
Returns:: a Monitor instance

public static void sniff(Admin admin,
                         TableName tableName)
                  throws Exception

Canary entry point for specified table.

public static void main(String[] args)
                 throws Exception

Class Canary