public <Response> void execute(
NodeListenerCallback<Response> callback, ActionListener<Response> listener)
throws ElasticsearchException {
ImmutableList<DiscoveryNode> nodes = this.nodes;
ensureNodesAreAvailable(nodes);
int index = getNodeNumber();
RetryListener<Response> retryListener = new RetryListener<>(callback, listener, nodes, index);
DiscoveryNode node = nodes.get((index) % nodes.size());
try {
callback.doWithNode(node, retryListener);
} catch (Throwable t) {
// this exception can't come from the TransportService as it doesn't throw exception at all
listener.onFailure(t);
}
}
@Override
public void onFailure(Throwable e) {
if (ExceptionsHelper.unwrapCause(e) instanceof ConnectTransportException) {
int i = ++this.i;
if (i >= nodes.size()) {
listener.onFailure(
new NoNodeAvailableException(
"None of the configured nodes were available: " + nodes, e));
} else {
try {
callback.doWithNode(nodes.get((index + i) % nodes.size()), this);
} catch (Throwable t) {
// this exception can't come from the TransportService as it doesn't throw exceptions at
// all
listener.onFailure(t);
}
}
} else {
listener.onFailure(e);
}
}