@Override
public Set<NodeId> getAvailableNodes(NodeType type) {
Set<NodeId> result = Sets.newHashSet();
ZNode typeNode = rootNode.child(CoordinationUtil.nodeNameOf(type));
for (ZNode node : typeNode.children()) {
if (node.hasChild(CoordinationUtil.AVAILABLE_NODE_NAME)) {
result.add(NodeId.of(type, node.getShortPath()));
}
}
return result;
}
@Override
public boolean canExecuteCommands(NodeId nodeId, Set<Qualifier<?>> qualifiers) {
ZNode typeNode = rootNode.child(CoordinationUtil.nodeNameOf(nodeId.getType()));
String identifier = nodeId.getIdentifier();
if (!typeNode.hasChild(identifier)) {
throw new CoordinatorException("Node with id " + nodeId + " is not found");
}
ZNode node = typeNode.child(identifier);
if (!node.hasChild(CoordinationUtil.AVAILABLE_NODE_NAME)) {
return false;
}
for (Qualifier<?> qualifier : qualifiers) {
if (!node.hasChild(nodeNameOf(qualifier))) {
return false;
}
}
return true;
}