/** Returns a node client to a given node. */
public synchronized Client client(String nodeName) {
ensureOpen();
NodeAndClient nodeAndClient = nodes.get(nodeName);
if (nodeAndClient != null) {
return nodeAndClient.client(random);
}
Assert.fail("No node found with name: [" + nodeName + "]");
return null; // can't happen
}
/** Returns a client to a node started with "node.client: true" */
public synchronized Client clientNodeClient() {
ensureOpen();
NodeAndClient randomNodeAndClient = getRandomNodeAndClient(new ClientNodePredicate());
if (randomNodeAndClient != null) {
return randomNodeAndClient.client(random);
}
startNodeClient(ImmutableSettings.EMPTY);
return getRandomNodeAndClient(new ClientNodePredicate()).client(random);
}
/**
* Returns a random node that applies to the given predicate. The predicate can filter nodes based
* on the nodes settings. If all nodes are filtered out this method will return <code>null</code>
*/
public synchronized Client client(final Predicate<Settings> filterPredicate) {
ensureOpen();
final NodeAndClient randomNodeAndClient =
getRandomNodeAndClient(
new Predicate<NodeAndClient>() {
@Override
public boolean apply(NodeAndClient nodeAndClient) {
return filterPredicate.apply(nodeAndClient.node.settings());
}
});
if (randomNodeAndClient != null) {
return randomNodeAndClient.client(random);
}
return null;
}