Examples with AvailabilityGuard org.neo4j.kernel.availability.AvailabilityGuard used on opensource projects

Example 1 with AvailabilityGuard

use of org.neo4j.kernel.availability.AvailabilityGuard in project neo4j by neo4j.

the class DatabaseAvailabilityIT method anyOfDatabaseUnavailabilityIsGlobalUnavailability.

@Test
void anyOfDatabaseUnavailabilityIsGlobalUnavailability() {
    AvailabilityRequirement outerSpaceRequirement = () -> "outer space";
    DependencyResolver dependencyResolver = database.getDependencyResolver();
    DatabaseManager<?> databaseManager = getDatabaseManager(dependencyResolver);
    CompositeDatabaseAvailabilityGuard compositeGuard = dependencyResolver.resolveDependency(CompositeDatabaseAvailabilityGuard.class);
    assertTrue(compositeGuard.isAvailable());
    DatabaseContext systemContext = databaseManager.getDatabaseContext(NAMED_SYSTEM_DATABASE_ID).get();
    DatabaseContext defaultContext = databaseManager.getDatabaseContext(defaultNamedDatabaseId).get();
    AvailabilityGuard systemGuard = systemContext.dependencies().resolveDependency(DatabaseAvailabilityGuard.class);
    systemGuard.require(outerSpaceRequirement);
    assertFalse(compositeGuard.isAvailable());
    systemGuard.fulfill(outerSpaceRequirement);
    assertTrue(compositeGuard.isAvailable());
    AvailabilityGuard defaultGuard = defaultContext.dependencies().resolveDependency(DatabaseAvailabilityGuard.class);
    defaultGuard.require(outerSpaceRequirement);
    assertFalse(compositeGuard.isAvailable());
    defaultGuard.fulfill(outerSpaceRequirement);
    assertTrue(compositeGuard.isAvailable());
}