| /* |
| * 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.atlas; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import org.aopalliance.intercept.MethodInterceptor; |
| import org.aopalliance.intercept.MethodInvocation; |
| import org.apache.atlas.exception.AtlasBaseException; |
| import org.apache.atlas.repository.graphdb.AtlasGraph; |
| import org.apache.atlas.typesystem.exception.NotFoundException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.stereotype.Component; |
| |
| import javax.inject.Inject; |
| import javax.ws.rs.core.Response; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.locks.ReentrantLock; |
| |
| @Component |
| public class GraphTransactionInterceptor implements MethodInterceptor { |
| private static final Logger LOG = LoggerFactory.getLogger(GraphTransactionInterceptor.class); |
| |
| @VisibleForTesting |
| private static final ObjectUpdateSynchronizer OBJECT_UPDATE_SYNCHRONIZER = new ObjectUpdateSynchronizer(); |
| private static final ThreadLocal<List<PostTransactionHook>> postTransactionHooks = new ThreadLocal<>(); |
| |
| private final AtlasGraph graph; |
| |
| @Inject |
| public GraphTransactionInterceptor(AtlasGraph graph) { |
| this.graph = graph; |
| } |
| |
| @Override |
| public Object invoke(MethodInvocation invocation) throws Throwable { |
| boolean isSuccess = false; |
| |
| try { |
| try { |
| Object response = invocation.proceed(); |
| graph.commit(); |
| isSuccess = true; |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("graph commit"); |
| } |
| |
| return response; |
| } catch (Throwable t) { |
| if (logException(t)) { |
| LOG.error("graph rollback due to exception ", t); |
| } else { |
| LOG.error("graph rollback due to exception {}:{}", t.getClass().getSimpleName(), t.getMessage()); |
| } |
| graph.rollback(); |
| throw t; |
| } |
| } finally { |
| List<PostTransactionHook> trxHooks = postTransactionHooks.get(); |
| |
| if (trxHooks != null) { |
| postTransactionHooks.remove(); |
| |
| for (PostTransactionHook trxHook : trxHooks) { |
| try { |
| trxHook.onComplete(isSuccess); |
| } catch (Throwable t) { |
| LOG.error("postTransactionHook failed", t); |
| } |
| } |
| } |
| |
| OBJECT_UPDATE_SYNCHRONIZER.releaseLockedObjects(); |
| } |
| } |
| |
| public static void lockObjectAndReleasePostCommit(final String guid) { |
| OBJECT_UPDATE_SYNCHRONIZER.lockObject(guid); |
| } |
| |
| public static void lockObjectAndReleasePostCommit(final List<String> guids) { |
| OBJECT_UPDATE_SYNCHRONIZER.lockObject(guids); |
| } |
| |
| boolean logException(Throwable t) { |
| if (t instanceof AtlasBaseException) { |
| Response.Status httpCode = ((AtlasBaseException) t).getAtlasErrorCode().getHttpCode(); |
| return httpCode != Response.Status.NOT_FOUND && httpCode != Response.Status.NO_CONTENT; |
| } else if (t instanceof NotFoundException) { |
| return false; |
| } else { |
| return true; |
| } |
| } |
| |
| public static abstract class PostTransactionHook { |
| protected PostTransactionHook() { |
| List<PostTransactionHook> trxHooks = postTransactionHooks.get(); |
| |
| if (trxHooks == null) { |
| trxHooks = new ArrayList<>(); |
| postTransactionHooks.set(trxHooks); |
| } |
| |
| trxHooks.add(this); |
| } |
| |
| public abstract void onComplete(boolean isSuccess); |
| } |
| |
| private static class RefCountedReentrantLock extends ReentrantLock { |
| private int refCount; |
| |
| public RefCountedReentrantLock() { |
| this.refCount = 0; |
| } |
| |
| public int increment() { |
| return ++refCount; |
| } |
| |
| public int decrement() { |
| return --refCount; |
| } |
| |
| public int getRefCount() { return refCount; } |
| } |
| |
| |
| public static class ObjectUpdateSynchronizer { |
| private final Map<String, RefCountedReentrantLock> guidLockMap = new ConcurrentHashMap<>(); |
| private final ThreadLocal<List<String>> lockedGuids = new ThreadLocal<List<String>>() { |
| @Override |
| protected List<String> initialValue() { |
| return new ArrayList<>(); |
| } |
| }; |
| |
| public void lockObject(final List<String> guids) { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> lockObject(): guids: {}", guids); |
| } |
| |
| Collections.sort(guids); |
| for (String g : guids) { |
| lockObject(g); |
| } |
| } |
| |
| private void lockObject(final String guid) { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> lockObject(): guid: {}, guidLockMap.size: {}", guid, guidLockMap.size()); |
| } |
| |
| ReentrantLock lock = getOrCreateObjectLock(guid); |
| lock.lock(); |
| |
| lockedGuids.get().add(guid); |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== lockObject(): guid: {}, guidLockMap.size: {}", guid, guidLockMap.size()); |
| } |
| } |
| |
| public void releaseLockedObjects() { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("==> releaseLockedObjects(): lockedGuids.size: {}", lockedGuids.get().size()); |
| } |
| |
| for (String guid : lockedGuids.get()) { |
| releaseObjectLock(guid); |
| } |
| |
| lockedGuids.get().clear(); |
| |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("<== releaseLockedObjects(): lockedGuids.size: {}", lockedGuids.get().size()); |
| } |
| } |
| |
| private RefCountedReentrantLock getOrCreateObjectLock(String guid) { |
| synchronized (guidLockMap) { |
| RefCountedReentrantLock ret = guidLockMap.get(guid); |
| if (ret == null) { |
| ret = new RefCountedReentrantLock(); |
| guidLockMap.put(guid, ret); |
| } |
| |
| ret.increment(); |
| return ret; |
| } |
| } |
| |
| private RefCountedReentrantLock releaseObjectLock(String guid) { |
| synchronized (guidLockMap) { |
| RefCountedReentrantLock lock = guidLockMap.get(guid); |
| if (lock != null && lock.isHeldByCurrentThread()) { |
| int refCount = lock.decrement(); |
| |
| if (refCount == 0) { |
| guidLockMap.remove(guid); |
| } |
| |
| lock.unlock(); |
| } else { |
| LOG.warn("releaseLockedObjects: {} Attempting to release a lock not held by current thread.", guid); |
| } |
| |
| return lock; |
| } |
| } |
| } |
| } |