| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.ignite.internal.managers.loadbalancer; |
| |
| import java.util.Collection; |
| import java.util.List; |
| import org.apache.ignite.IgniteCheckedException; |
| import org.apache.ignite.IgniteException; |
| import org.apache.ignite.cluster.ClusterNode; |
| import org.apache.ignite.compute.ComputeJob; |
| import org.apache.ignite.compute.ComputeLoadBalancer; |
| import org.apache.ignite.internal.GridKernalContext; |
| import org.apache.ignite.internal.GridTaskSessionImpl; |
| import org.apache.ignite.internal.managers.GridManagerAdapter; |
| import org.apache.ignite.internal.util.typedef.F; |
| import org.apache.ignite.internal.util.typedef.internal.A; |
| import org.apache.ignite.spi.loadbalancing.LoadBalancingSpi; |
| import org.apache.ignite.spi.loadbalancing.roundrobin.RoundRobinLoadBalancingSpi; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Load balancing manager. |
| */ |
| public class GridLoadBalancerManager extends GridManagerAdapter<LoadBalancingSpi> { |
| /** |
| * @param ctx Grid kernal context. |
| */ |
| public GridLoadBalancerManager(GridKernalContext ctx) { |
| super(ctx, ctx.config().getLoadBalancingSpi()); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void start() throws IgniteCheckedException { |
| startSpi(); |
| |
| if (log.isDebugEnabled()) |
| log.debug(startInfo()); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void stop(boolean cancel) throws IgniteCheckedException { |
| stopSpi(); |
| |
| if (log.isDebugEnabled()) |
| log.debug(stopInfo()); |
| } |
| |
| /** |
| * @param ses Task session. |
| * @param top Task topology. |
| * @param job Job to balance. |
| * @return Next balanced node. |
| * @throws IgniteException If anything failed. |
| */ |
| public ClusterNode getBalancedNode(GridTaskSessionImpl ses, List<ClusterNode> top, ComputeJob job) |
| throws IgniteException { |
| assert ses != null; |
| assert top != null; |
| assert job != null; |
| |
| LoadBalancingSpi spi = getSpi(ses.getLoadBalancingSpi()); |
| |
| if (ses.isInternal() && !(spi instanceof RoundRobinLoadBalancingSpi)) |
| return getSpi(RoundRobinLoadBalancingSpi.class.getSimpleName()).getBalancedNode(ses, top, job); |
| |
| return spi.getBalancedNode(ses, top, job); |
| } |
| |
| /** |
| * @param ses Grid task session. |
| * @param top Task topology. |
| * @return Load balancer. |
| */ |
| @SuppressWarnings("ExternalizableWithoutPublicNoArgConstructor") |
| public ComputeLoadBalancer getLoadBalancer(final GridTaskSessionImpl ses, final List<ClusterNode> top) { |
| assert ses != null; |
| |
| // Return value is not intended for sending over network. |
| return new GridLoadBalancerAdapter() { |
| @Nullable @Override public ClusterNode getBalancedNode(ComputeJob job, @Nullable Collection<ClusterNode> exclNodes) { |
| A.notNull(job, "job"); |
| |
| if (F.isEmpty(exclNodes)) |
| return GridLoadBalancerManager.this.getBalancedNode(ses, top, job); |
| |
| List<ClusterNode> nodes = F.loseList(top, true, exclNodes); |
| |
| if (nodes.isEmpty()) |
| return null; |
| |
| // Exclude list of nodes from topology. |
| return GridLoadBalancerManager.this.getBalancedNode(ses, nodes, job); |
| } |
| }; |
| } |
| } |