| /* |
| * 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.client.balancer; |
| |
| import java.util.Collection; |
| import org.apache.ignite.internal.client.GridClientNode; |
| import org.apache.ignite.internal.util.typedef.F; |
| import org.apache.ignite.lang.IgnitePredicate; |
| |
| /** |
| * Base class for balancers. Contains common direct connection handling logic. |
| */ |
| public abstract class GridClientBalancerAdapter implements GridClientLoadBalancer { |
| /** Selects connectable nodes. */ |
| private static final IgnitePredicate<GridClientNode> CONNECTABLE = |
| new IgnitePredicate<GridClientNode>() { |
| @Override public boolean apply(GridClientNode e) { |
| return e.connectable(); |
| } |
| }; |
| |
| /** Prefer direct nodes. */ |
| private boolean preferDirectNodes; |
| |
| /** |
| * If set to {@code true} balancer should prefer directly connectable |
| * nodes over others. |
| * <p> |
| * In other words when working in router connection mode |
| * client will prefer send requests to router nodes |
| * if operation projection contains some of them. |
| * <p> |
| * Default value is {@code false}. |
| * |
| * @see GridClientNode#connectable() |
| * @return Prefer direct nodes. |
| */ |
| public boolean isPreferDirectNodes() { |
| return preferDirectNodes; |
| } |
| |
| /** |
| * Sets prefer direct nodes. |
| * |
| * @param preferDirectNodes Prefer direct nodes. |
| * @return {@code this} for chaining. |
| */ |
| public GridClientBalancerAdapter setPreferDirectNodes(boolean preferDirectNodes) { |
| this.preferDirectNodes = preferDirectNodes; |
| |
| return this; |
| } |
| |
| /** |
| * Returns only directly available nodes from given collection. |
| * |
| * @param nodes Nodes. |
| * @return Directly available subset. |
| */ |
| protected static Collection<GridClientNode> selectDirectNodes(Collection<? extends GridClientNode> nodes) { |
| return F.viewReadOnly(nodes, F.<GridClientNode>identity(), CONNECTABLE); |
| } |
| } |