/**
* Change topology.
*
* @param parent Grid to execute tasks on.
* @param add New nodes count.
* @param rmv Remove nodes count.
* @param type Type of nodes to manipulate.
*/
private static void changeTopology(Ignite parent, int add, int rmv, String type) {
Collection<ComputeTaskFuture<?>> tasks = new ArrayList<>();
IgniteCompute comp = parent.compute().withAsync();
// Start nodes in parallel.
while (add-- > 0) {
comp.execute(ClientStartNodeTask.class, type);
tasks.add(comp.future());
}
for (ComputeTaskFuture<?> task : tasks) task.get();
// Stop nodes in sequence.
while (rmv-- > 0) parent.compute().execute(ClientStopNodeTask.class, type);
// Wait for node stops.
// U.sleep(1000);
Collection<String> gridNames = new ArrayList<>();
for (Ignite g : G.allGrids()) gridNames.add(g.name());
parent.log().info(">>> Available grids: " + gridNames);
}
/** {@inheritDoc} */
@Override
protected Object executeJob(int gridSize, String type) {
log.info(">>> Starting new grid node [currGridSize=" + gridSize + ", arg=" + type + "]");
if (type == null) throw new IllegalArgumentException("Node type to start should be specified.");
IgniteConfiguration cfg = getConfig(type);
// Generate unique for this VM grid name.
String gridName = cfg.getGridName() + " (" + UUID.randomUUID() + ")";
// Update grid name (required to be unique).
cfg.setGridName(gridName);
// Start new node in current VM.
Ignite g = G.start(cfg);
log.info(
">>> Grid started [nodeId=" + g.cluster().localNode().id() + ", name='" + g.name() + "']");
return true;
}