| /* |
| * 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.geode.cache.client.internal; |
| |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.RejectedExecutionException; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.cache.client.internal.EndpointManager.EndpointListenerAdapter; |
| import org.apache.geode.cache.client.internal.PoolImpl.PoolTask; |
| import org.apache.geode.internal.cache.GemFireCacheImpl; |
| import org.apache.geode.internal.cache.InternalCache; |
| import org.apache.geode.logging.internal.log4j.api.LogService; |
| |
| /** |
| * Responsible for pinging live servers to make sure they are still alive. |
| * |
| */ |
| public class LiveServerPinger extends EndpointListenerAdapter { |
| private static final Logger logger = LogService.getLogger(); |
| |
| private static final long NANOS_PER_MS = 1000000L; |
| |
| private final ConcurrentMap<Endpoint, Future> taskFutures = new ConcurrentHashMap<>(); |
| protected final InternalPool pool; |
| protected final long pingIntervalNanos; |
| |
| public LiveServerPinger(InternalPool pool) { |
| this.pool = pool; |
| this.pingIntervalNanos = ((pool.getPingInterval() + 1) / 2) * NANOS_PER_MS; |
| } |
| |
| @Override |
| public void endpointCrashed(Endpoint endpoint) { |
| cancelFuture(endpoint); |
| } |
| |
| @Override |
| public void endpointNoLongerInUse(Endpoint endpoint) { |
| cancelFuture(endpoint); |
| } |
| |
| @Override |
| public void endpointNowInUse(Endpoint endpoint) { |
| try { |
| Future future = pool.getBackgroundProcessor().scheduleWithFixedDelay(new PingTask(endpoint), |
| pingIntervalNanos, pingIntervalNanos, TimeUnit.NANOSECONDS); |
| taskFutures.put(endpoint, future); |
| } catch (RejectedExecutionException e) { |
| if (!pool.getCancelCriterion().isCancelInProgress()) { |
| throw e; |
| } |
| } |
| } |
| |
| private void cancelFuture(Endpoint endpoint) { |
| Future future = taskFutures.remove(endpoint); |
| if (future != null) { |
| future.cancel(false); |
| } |
| } |
| |
| private class PingTask extends PoolTask { |
| private final Endpoint endpoint; |
| |
| PingTask(Endpoint endpoint) { |
| this.endpoint = endpoint; |
| } |
| |
| @Override |
| public void run2() { |
| if (endpoint.timeToPing(pingIntervalNanos)) { |
| try { |
| PingOp.execute(pool, endpoint.getLocation()); |
| } catch (Exception e) { |
| if (logger.isDebugEnabled()) { |
| logger.debug("Error occurred while pinging server: {} - {}", endpoint.getLocation(), |
| e.getMessage()); |
| } |
| InternalCache cache = GemFireCacheImpl.getInstance(); |
| if (cache != null) { |
| ClientMetadataService cms = cache.getClientMetadataService(); |
| cms.removeBucketServerLocation(endpoint.getLocation()); |
| } |
| // any failure to ping the server should be considered a crash (eg. |
| // socket timeout exception, security exception, failure to connect). |
| pool.getEndpointManager().serverCrashed(endpoint); |
| } |
| } |
| } |
| } |
| |
| } |