// Wrap the executor with a logging executor ...
executor = new LoggingCommandExecutor(executor, context.getLogger(getClass()), Logger.Level.DEBUG);
// The configuration projection (via "executor") will convert this path into a path that exists in the configuration
// repository
Path configNode = pathFactory.create(PATH_TO_CONFIGURATION_INFORMATION);
try {
// Get the repository node ...
BasicGetNodeCommand getRepository = new BasicGetNodeCommand(configNode);
executor.execute(getRepository);
if (getRepository.hasError()) {
throw new FederationException(FederationI18n.federatedRepositoryCannotBeFound.text(repositoryName));
}
// Get the first child node of the "dna:cache" node, since this represents the source used as the cache ...
Path cacheNode = pathFactory.create(configNode, nameFactory.create(DNA_CACHE_SEGMENT));
BasicGetChildrenCommand getCacheSource = new BasicGetChildrenCommand(cacheNode);
executor.execute(getCacheSource);
if (getCacheSource.hasError() || getCacheSource.getChildren().size() < 1) {
I18n msg = FederationI18n.requiredNodeDoesNotExistRelativeToNode;
throw new FederationException(msg.text(DNA_CACHE_SEGMENT, configNode));
}
// Add a command to get the projection defining the cache ...
Path pathToCacheRegion = pathFactory.create(cacheNode, getCacheSource.getChildren().get(0));
BasicGetNodeCommand getCacheRegion = new BasicGetNodeCommand(pathToCacheRegion);
executor.execute(getCacheRegion);
Projection cacheProjection = createProjection(context,
projectionParser,
getCacheRegion.getPath(),
getCacheRegion.getPropertiesByName(),
problems);
if (getCacheRegion.hasError()) {
I18n msg = FederationI18n.requiredNodeDoesNotExistRelativeToNode;
throw new FederationException(msg.text(DNA_CACHE_SEGMENT, configNode));
}
// Get the source projections for the repository ...
Path projectionsNode = pathFactory.create(configNode, nameFactory.create(DNA_PROJECTIONS_SEGMENT));
BasicGetChildrenCommand getProjections = new BasicGetChildrenCommand(projectionsNode);
executor.execute(getProjections);
if (getProjections.hasError()) {
I18n msg = FederationI18n.requiredNodeDoesNotExistRelativeToNode;
throw new FederationException(msg.text(DNA_PROJECTIONS_SEGMENT, configNode));
}
// Build the commands to get each of the projections (children of the "dna:projections" node) ...
List<Projection> sourceProjections = new LinkedList<Projection>();
if (getProjections.hasNoError() && !getProjections.getChildren().isEmpty()) {
BasicCompositeCommand commands = new BasicCompositeCommand();
for (Path.Segment child : getProjections.getChildren()) {
final Path pathToSource = pathFactory.create(projectionsNode, child);
commands.add(new BasicGetNodeCommand(pathToSource));
}
// Now execute these commands ...
executor.execute(commands);