SidecarDownMonitor (cassandra-analytics-cdc-sidecar 0.3.0 API)

```
public interface SidecarDownMonitor
```
This interface provides information about the health of other Sidecar instances. CDC attempts to read from all replicas and is slowed by retrying requests on Sidecar instances that are already known to be DOWN, therefore we skip DOWN instances and only retry when they are known to be healthy again via some asynchronous mechanism.

Field Summary

Fields
Modifier and Type Field Description

static SidecarDownMonitor STUB

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`void`	`hintDown(org.apache.cassandra.spark.data.partitioner.CassandraInstance instance)`	Pass a hint down to the implementation that the CassandraInstance might be DOWN.
`boolean`	`isDown(org.apache.cassandra.spark.data.partitioner.CassandraInstance instance)`
`default boolean`	`isUp(org.apache.cassandra.spark.data.partitioner.CassandraInstance instance)`

- Field Detail
  - STUB
```
static final SidecarDownMonitor STUB
```
- Method Detail
  - isUp
```
default boolean isUp(org.apache.cassandra.spark.data.partitioner.CassandraInstance instance)
```
    Parameters:
    
    instance - the CassandraInstance
    
    Returns:
    
    true if the CassandraInstance is known to be not DOWN.
  - isDown
```
boolean isDown(org.apache.cassandra.spark.data.partitioner.CassandraInstance instance)
```
    Parameters:
    
    instance - the CassandraInstance
    
    Returns:
    
    true if the CassandraInstance is known to be DOWN.
  - hintDown
```
void hintDown(org.apache.cassandra.spark.data.partitioner.CassandraInstance instance)
```
    Pass a hint down to the implementation that the CassandraInstance might be DOWN. It is up to the implementation to take this as canonical or take further action to detect the health.
    
    Parameters:
    
    instance - the CassandraInstance