| /* |
| * 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.jackrabbit.oak.jcr.lock; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import javax.annotation.CheckForNull; |
| import javax.annotation.Nonnull; |
| import javax.jcr.Node; |
| import javax.jcr.RepositoryException; |
| import javax.jcr.lock.Lock; |
| import javax.jcr.lock.LockException; |
| |
| import org.apache.jackrabbit.oak.jcr.session.NodeImpl; |
| import org.apache.jackrabbit.oak.jcr.session.SessionContext; |
| import org.apache.jackrabbit.oak.jcr.delegate.NodeDelegate; |
| import org.apache.jackrabbit.oak.jcr.session.operation.NodeOperation; |
| import org.apache.jackrabbit.oak.jcr.session.operation.SessionOperation; |
| |
| public final class LockImpl implements Lock { |
| |
| private final SessionContext context; |
| |
| private final NodeDelegate delegate; |
| |
| public LockImpl( |
| @Nonnull SessionContext context, @Nonnull NodeDelegate delegate) { |
| this.context = checkNotNull(context); |
| this.delegate = checkNotNull(delegate); |
| } |
| |
| @Override |
| public Node getNode() { |
| try { |
| return NodeImpl.createNode(delegate, context); |
| } catch (RepositoryException e) { |
| throw new RuntimeException("Unable to access the lock node", e); |
| } |
| } |
| |
| @Override |
| public String getLockOwner() { |
| return safePerform(new NodeOperation<String>(delegate) { |
| @Override |
| public String perform() throws RepositoryException { |
| return node.getLockOwner(); |
| } |
| }); |
| } |
| |
| @Override |
| public boolean isDeep() { |
| return safePerform(new NodeOperation<Boolean>(delegate) { |
| @Override |
| public Boolean perform() throws RepositoryException { |
| return node.holdsLock(true); |
| } |
| }); |
| } |
| |
| @Override |
| public boolean isLive() { |
| return context.getSession().isLive() && safePerform( |
| new NodeOperation<Boolean>(delegate) { |
| @Override |
| public Boolean perform() throws RepositoryException { |
| return node.holdsLock(false); |
| } |
| }); |
| } |
| |
| |
| @Override |
| public String getLockToken() { |
| return safePerform(new NodeOperation<String>(delegate) { |
| @Override |
| public String perform() throws RepositoryException { |
| String token = node.getPath(); |
| if (context.getOpenScopedLocks().contains(token)) { |
| return token; |
| } else if (context.getSessionScopedLocks().contains(token)) { |
| // Prevent session-scoped locks from exposing their |
| // tokens to the session that holds the lock. However, |
| // another session of the lock owner will be able to |
| // acquire the lock token and thus release the lock. |
| return null; |
| } |
| |
| String owner = |
| context.getSessionDelegate().getAuthInfo().getUserID(); |
| if (owner == null) { |
| owner = ""; |
| } |
| if (owner.equals(node.getLockOwner())) { |
| return token; |
| } |
| |
| return null; |
| } |
| }); |
| } |
| |
| @Override |
| public long getSecondsRemaining() { |
| if (isLive()) { |
| return Long.MAX_VALUE; |
| } else { |
| return -1; |
| } |
| } |
| |
| @Override |
| public boolean isSessionScoped() { |
| return safePerform(new NodeOperation<Boolean>(delegate) { |
| @Override |
| public Boolean perform() throws RepositoryException { |
| String path = node.getPath(); |
| return context.getSessionScopedLocks().contains(path); |
| } |
| }); |
| } |
| |
| @Override |
| public boolean isLockOwningSession() { |
| return safePerform(new NodeOperation<Boolean>(delegate) { |
| @Override |
| public Boolean perform() throws RepositoryException { |
| String path = node.getPath(); |
| return context.getSessionScopedLocks().contains(path) |
| || context.getOpenScopedLocks().contains(path); |
| } |
| }); |
| } |
| |
| @Override |
| public void refresh() throws LockException { |
| if (!isLive()) { |
| throw new LockException("This lock is not alive"); |
| } |
| } |
| |
| //-----------------------------------------------------------< private >-- |
| |
| /** |
| * Perform the passed {@link SessionOperation} assuming it does not |
| * throw a {@code RepositoryException}. If it does, wrap it into and |
| * throw it as a {@code RuntimeException}. |
| * |
| * @param op operation to perform |
| * @param <U> return type of the operation |
| * @return the result of {@code op.perform()} |
| */ |
| @CheckForNull |
| private final <U> U safePerform(@Nonnull SessionOperation<U> op) { |
| return context.getSessionDelegate().safePerform(op); |
| } |
| |
| } |