| /* |
| * 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.processors.cache.query.jdbc; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import org.apache.ignite.Ignite; |
| import org.apache.ignite.cluster.ClusterNode; |
| import org.apache.ignite.compute.ComputeJob; |
| import org.apache.ignite.compute.ComputeJobAdapter; |
| import org.apache.ignite.compute.ComputeJobResult; |
| import org.apache.ignite.compute.ComputeTaskSplitAdapter; |
| import org.apache.ignite.internal.IgniteKernal; |
| import org.apache.ignite.internal.managers.discovery.GridDiscoveryManager; |
| import org.apache.ignite.internal.util.typedef.F; |
| import org.apache.ignite.resources.IgniteInstanceResource; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Task to validate connection. Checks that cache with provided name exists in grid. |
| */ |
| public class GridCacheQueryJdbcValidationTask extends ComputeTaskSplitAdapter<String, Boolean> { |
| /** */ |
| private static final long serialVersionUID = 0L; |
| |
| /** {@inheritDoc} */ |
| @Override protected Collection<? extends ComputeJob> split(int gridSize, @Nullable final String cacheName) { |
| return Collections.singleton(new ComputeJobAdapter() { |
| @IgniteInstanceResource |
| private Ignite ignite; |
| |
| @Override public Object execute() { |
| if (cacheName == null) |
| return true; |
| |
| GridDiscoveryManager discoMgr = ((IgniteKernal)ignite).context().discovery(); |
| |
| for (ClusterNode n : ignite.cluster().nodes()) |
| if (discoMgr.cacheNode(n, cacheName)) |
| return true; |
| |
| return false; |
| } |
| }); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Boolean reduce(List<ComputeJobResult> results) { |
| return F.first(results).getData(); |
| } |
| } |