| /* |
| * 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.cassandra.repair; |
| |
| import java.util.concurrent.ExecutionException; |
| |
| import org.apache.cassandra.exceptions.RepairException; |
| import org.apache.cassandra.locator.InetAddressAndPort; |
| import org.apache.cassandra.repair.messages.RepairMessage; |
| import org.apache.cassandra.repair.messages.ValidationRequest; |
| import org.apache.cassandra.streaming.PreviewKind; |
| import org.apache.cassandra.utils.MerkleTrees; |
| import org.apache.cassandra.utils.concurrent.AsyncFuture; |
| |
| import static org.apache.cassandra.net.Verb.VALIDATION_REQ; |
| |
| /** |
| * ValidationTask sends {@link ValidationRequest} to a replica. |
| * When a replica sends back message, task completes. |
| */ |
| public class ValidationTask extends AsyncFuture<TreeResponse> implements Runnable |
| { |
| private final RepairJobDesc desc; |
| private final InetAddressAndPort endpoint; |
| private final int nowInSec; |
| private final PreviewKind previewKind; |
| |
| private boolean active = true; |
| |
| public ValidationTask(RepairJobDesc desc, InetAddressAndPort endpoint, int nowInSec, PreviewKind previewKind) |
| { |
| this.desc = desc; |
| this.endpoint = endpoint; |
| this.nowInSec = nowInSec; |
| this.previewKind = previewKind; |
| } |
| |
| /** |
| * Send ValidationRequest to replica |
| */ |
| public void run() |
| { |
| RepairMessage.sendMessageWithFailureCB(new ValidationRequest(desc, nowInSec), |
| VALIDATION_REQ, |
| endpoint, |
| this::tryFailure); |
| } |
| |
| /** |
| * Receive MerkleTrees from replica node. |
| * |
| * @param trees MerkleTrees that is sent from replica. Null if validation failed on replica node. |
| */ |
| public synchronized void treesReceived(MerkleTrees trees) |
| { |
| if (trees == null) |
| { |
| active = false; |
| tryFailure(RepairException.warn(desc, previewKind, "Validation failed in " + endpoint)); |
| } |
| else if (active) |
| { |
| trySuccess(new TreeResponse(endpoint, trees)); |
| } |
| else |
| { |
| // If the task has already been aborted, just release the possibly off-heap trees and move along. |
| trees.release(); |
| trySuccess(null); |
| } |
| } |
| |
| /** |
| * Release any trees already received by this task, and place it a state where any trees |
| * received subsequently will be properly discarded. |
| */ |
| public synchronized void abort() |
| { |
| if (active) |
| { |
| if (isDone()) |
| { |
| try |
| { |
| // If we're done, this should return immediately. |
| TreeResponse response = get(); |
| |
| if (response.trees != null) |
| response.trees.release(); |
| } |
| catch (InterruptedException e) |
| { |
| // Restore the interrupt. |
| Thread.currentThread().interrupt(); |
| } |
| catch (ExecutionException e) |
| { |
| // Do nothing here. If an exception was set, there were no trees to release. |
| } |
| } |
| |
| active = false; |
| } |
| } |
| |
| public synchronized boolean isActive() |
| { |
| return active; |
| } |
| } |