HealthCheck (Atlassian Confluence 8.0.0-m90 API)

All Known Implementing Classes:

AbstractHealthCheck, DatabaseCollationHealthCheck, DatabaseSetupHealthCheck, DbConnectionHealthCheck, FakeHealthCheck, HealthCheckTemplate, HomeHealthCheck, HttpThreadsVsDbConnectionsHealthCheck, LicenseValidationHealthCheck, MSSQLDriverMigrationHealthCheck, MySqlJdbcUrlHealthCheck, OperatingSystemFreeMemoryHealthCheck
```
public interface HealthCheck
```
A health check performed by Confluence during some phase (or phases) of its lifecycle. A check should:
- Return an empty collection on success.
- Return a non-empty collection otherwise, e.g. failure.
- Throw an exception if called during not applicable phase
- Check things that prevent startup or otherwise require attention from the administrator.
- Not check things that Confluence can fix by itself (e.g. creating a needed directory).
- Be short-running, because it is invoked synchronously.
- Release any acquired resources before returning from its perform(LifecyclePhase) method.
- Not have side-effects (e.g. logging its own messages or Johnson events).
Since:

6.6.0

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default String`	`getId()`	Returns the unique ID of this check.
`@NonNull Collection<HealthCheck>`	`getPrerequisites()`	Returns the checks that must have a non-`EventLevel.FATAL` result before this check can be run.
`boolean`	`isApplicableFor(LifecyclePhase phase)`	Checks if current HealthCheck is applicable for given phase
`@NonNull List<HealthCheckResult>`	`perform(LifecyclePhase phase)`	Performs health check for given phase.

- Method Detail
  - getId
```
default String getId()
```
    Returns the unique ID of this check.
    
    Returns:
    
    a stable, unique, non-blank ID
  - getPrerequisites
```
@NonNull Collection<HealthCheck> getPrerequisites()
```
    Returns the checks that must have a non-EventLevel.FATAL result before this check can be run.
    
    Returns:
    
    see above
  - perform
```
@NonNull List<HealthCheckResult> perform(LifecyclePhase phase)
```
    Performs health check for given phase.
    If the health check passes, an empty list will be returned.
    
    Returns:
    
    a collection of HealthCheckResult
    
    Throws:
    
    UnsupportedOperationException - if not applicable phase is provided
  - isApplicableFor
```
boolean isApplicableFor(LifecyclePhase phase)
```
    Checks if current HealthCheck is applicable for given phase
    
    Returns:
    
    true if HealthCheck is applicable for the phase