| /** |
| * 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.hadoop.yarn.server.nodemanager.containermanager.localizer; |
| |
| import java.io.File; |
| import java.util.Iterator; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.yarn.api.records.LocalResourceVisibility; |
| import org.apache.hadoop.yarn.event.Dispatcher; |
| import org.apache.hadoop.yarn.server.nodemanager.DeletionService; |
| import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.ResourceEvent; |
| import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.event.ResourceEventType; |
| |
| /** |
| * A collection of {@link LocalizedResource}s all of same |
| * {@link LocalResourceVisibility}. |
| * |
| */ |
| |
| class LocalResourcesTrackerImpl implements LocalResourcesTracker { |
| |
| static final Log LOG = LogFactory.getLog(LocalResourcesTrackerImpl.class); |
| private static final String RANDOM_DIR_REGEX = "-?\\d+"; |
| private static final Pattern RANDOM_DIR_PATTERN = Pattern |
| .compile(RANDOM_DIR_REGEX); |
| |
| private final String user; |
| private final Dispatcher dispatcher; |
| private final ConcurrentMap<LocalResourceRequest,LocalizedResource> localrsrc; |
| |
| public LocalResourcesTrackerImpl(String user, Dispatcher dispatcher) { |
| this(user, dispatcher, |
| new ConcurrentHashMap<LocalResourceRequest,LocalizedResource>()); |
| } |
| |
| LocalResourcesTrackerImpl(String user, Dispatcher dispatcher, |
| ConcurrentMap<LocalResourceRequest,LocalizedResource> localrsrc) { |
| this.user = user; |
| this.dispatcher = dispatcher; |
| this.localrsrc = localrsrc; |
| } |
| |
| @Override |
| public void handle(ResourceEvent event) { |
| LocalResourceRequest req = event.getLocalResourceRequest(); |
| LocalizedResource rsrc = localrsrc.get(req); |
| switch (event.getType()) { |
| case REQUEST: |
| case LOCALIZED: |
| if (rsrc != null && (!isResourcePresent(rsrc))) { |
| LOG.info("Resource " + rsrc.getLocalPath() |
| + " is missing, localizing it again"); |
| localrsrc.remove(req); |
| rsrc = null; |
| } |
| if (null == rsrc) { |
| rsrc = new LocalizedResource(req, dispatcher); |
| localrsrc.put(req, rsrc); |
| } |
| break; |
| case RELEASE: |
| if (null == rsrc) { |
| LOG.info("Release unknown rsrc null (discard)"); |
| return; |
| } |
| break; |
| } |
| rsrc.handle(event); |
| } |
| |
| /** |
| * This module checks if the resource which was localized is already present |
| * or not |
| * |
| * @param rsrc |
| * @return true/false based on resource is present or not |
| */ |
| public boolean isResourcePresent(LocalizedResource rsrc) { |
| boolean ret = true; |
| if (rsrc.getState() == ResourceState.LOCALIZED) { |
| File file = new File(rsrc.getLocalPath().toUri().getRawPath().toString()); |
| if (!file.exists()) { |
| ret = false; |
| } |
| } |
| return ret; |
| } |
| |
| @Override |
| public boolean contains(LocalResourceRequest resource) { |
| return localrsrc.containsKey(resource); |
| } |
| |
| @Override |
| public boolean remove(LocalizedResource rem, DeletionService delService) { |
| // current synchronization guaranteed by crude RLS event for cleanup |
| LocalizedResource rsrc = localrsrc.get(rem.getRequest()); |
| if (null == rsrc) { |
| LOG.error("Attempt to remove absent resource: " + rem.getRequest() |
| + " from " + getUser()); |
| return true; |
| } |
| if (rsrc.getRefCount() > 0 |
| || ResourceState.DOWNLOADING.equals(rsrc.getState()) || rsrc != rem) { |
| // internal error |
| LOG.error("Attempt to remove resource: " + rsrc |
| + " with non-zero refcount"); |
| return false; |
| } else { // ResourceState is LOCALIZED or INIT |
| localrsrc.remove(rem.getRequest()); |
| if (ResourceState.LOCALIZED.equals(rsrc.getState())) { |
| delService.delete(getUser(), getPathToDelete(rsrc.getLocalPath())); |
| } |
| return true; |
| } |
| } |
| |
| |
| /** |
| * Returns the path up to the random directory component. |
| */ |
| private Path getPathToDelete(Path localPath) { |
| Path delPath = localPath.getParent(); |
| String name = delPath.getName(); |
| Matcher matcher = RANDOM_DIR_PATTERN.matcher(name); |
| if (matcher.matches()) { |
| return delPath; |
| } else { |
| LOG.warn("Random directory component did not match. " + |
| "Deleting localized path only"); |
| return localPath; |
| } |
| } |
| |
| @Override |
| public String getUser() { |
| return user; |
| } |
| |
| @Override |
| public Iterator<LocalizedResource> iterator() { |
| return localrsrc.values().iterator(); |
| } |
| } |