public ClusterInstance instance(String to) throws URISyntaxException {
URI uri = new URI(to);
for (ClusterInstance clusterInstance : instances) {
URI instanceUri = clusterInstance.uri();
if (instanceUri.getHost().equals(uri.getHost()) && instanceUri.getPort() == uri.getPort()) {
return clusterInstance;
}
}
throw new IllegalArgumentException("No instance in cluster at address: " + to);
}
public ClusterState snapshot() {
Set<ClusterAction> newPendingActions = new LinkedHashSet<>(pendingActions);
// Clone the current state & perform the action on it to change it
List<ClusterInstance> cloneInstances = new ArrayList<>();
for (ClusterInstance clusterInstance : instances) {
cloneInstances.add(clusterInstance.newCopy());
}
return new ClusterState(cloneInstances, newPendingActions);
}
public boolean isDeadEnd() {
if (pendingActions.size() > 0) {
return false;
}
for (ClusterInstance instance : instances) {
if (instance.hasPendingTimeouts()) {
return false;
}
}
return true;
}
/** Test of getMaster method, of class HadoopCluster. */
@Test
public void testGetMaster() {
System.out.println("getMaster");
ClusterInstance result = cluster.getMaster();
assertNotNull(result);
assertEquals(cluster.getMasterGroupName(), result.getSecurityGroups().get(0));
Instance slaveInstance = result.getInstance();
StringBuilder sb = new StringBuilder("\t");
sb.append(slaveInstance.getInstanceId());
sb.append(" ");
sb.append(slaveInstance.getInstanceType());
sb.append(" ");
sb.append(slaveInstance.getLaunchTime().toString());
sb.append(" ");
sb.append(slaveInstance.getImageId());
out.println(sb.toString());
}
/**
* Managing timeouts is trickier than putting all of them in a long list, like regular message
* delivery. Timeouts are ordered and can be cancelled, so they need special treatment. Hence a
* separate method for managing timeouts triggering.
*/
private Pair<ClusterAction, ClusterState> performNextTimeoutFrom(ClusterInstance instance)
throws Exception {
ClusterState newState = snapshot();
ClusterAction clusterAction = newState.instance(instance.uri().toASCIIString()).popTimeout();
clusterAction.perform(newState);
return Pair.of(clusterAction, newState);
}
/** Test of getSlaves method, of class HadoopCluster. */
@Test
public void testGetSlaves() {
out.println("getSlaves");
List<ClusterInstance> result = cluster.getSlaves();
out.println("found " + result.size() + " slaves for group " + TEST_GROUP);
assertNotNull(result);
StringBuilder sb = new StringBuilder("\t");
for (ClusterInstance slave : result) {
assertEquals(cluster.getGroupName(), slave.getSecurityGroups().get(0));
Instance slaveInstance = slave.getInstance();
if (sb.length() > 1) sb.delete(1, sb.length());
sb.append(slaveInstance.getInstanceId());
sb.append(" ");
sb.append(slaveInstance.getInstanceType());
sb.append(" ");
sb.append(slaveInstance.getLaunchTime().toString());
sb.append(" ");
sb.append(slaveInstance.getImageId());
out.println(sb.toString());
}
}
@Override
public boolean accept(ClusterInstance item) {
return item.hasPendingTimeouts();
}
