StartupCheck (apache-cassandra API)

All Known Implementing Classes:

DataResurrectionCheck, FileSystemOwnershipCheck
```
public interface StartupCheck
```
A test to determine if the system is in a valid state to start up. Some implementations may not actually halt startup, but provide information or advice on tuning and non-fatal environmental issues (e.g. like checking for and warning about suboptimal JVM settings). Other checks may indicate that the system is not in a correct state to be started. Examples include missing or unaccessible data directories, unreadable sstables and misconfiguration of cluster_name in cassandra.yaml. The StartupChecks class manages a collection of these tests, which it executes right at the beginning of the server setup process.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`void`	`execute(StartupChecksOptions startupChecksOptions)`	Run some test to determine whether the system is safe to be started In the case where a test determines it is not safe to proceed, the test should log a message regarding the reason for the failure and ideally the steps required to remedy the problem.
`default StartupChecks.StartupCheckType`	`getStartupCheckType()`
`default void`	`postAction(StartupChecksOptions options)`	Post-hook after all startup checks succeeded.

- Method Detail
  - execute
```
void execute(StartupChecksOptions startupChecksOptions)
      throws StartupException
```
    Run some test to determine whether the system is safe to be started In the case where a test determines it is not safe to proceed, the test should log a message regarding the reason for the failure and ideally the steps required to remedy the problem.
    
    Parameters:
    
    startupChecksOptions - all options from descriptor
    
    Throws:
    
    StartupException - if the test determines that the environement or system is not in a safe state to startup
  - getStartupCheckType
```
default StartupChecks.StartupCheckType getStartupCheckType()
```
    Returns:
    
    type of this startup check for configuration retrieval
  - postAction
```
default void postAction(StartupChecksOptions options)
```
    Post-hook after all startup checks succeeded.
    
    Parameters:
    
    options - startup check options from descriptor