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https://issues.apache.org/jira/browse/TWILL-118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326900#comment-14326900
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ASF GitHub Bot commented on TWILL-118:
--------------------------------------
Github user chtyim commented on a diff in the pull request:
https://github.com/apache/incubator-twill/pull/25#discussion_r24961493
--- Diff:
twill-zookeeper/src/main/java/org/apache/twill/internal/zookeeper/ReentrantDistributedLock.java
---
@@ -0,0 +1,419 @@
+/*
+ * 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.twill.internal.zookeeper;
+
+import com.google.common.base.Preconditions;
+import com.google.common.base.Throwables;
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.SettableFuture;
+import com.google.common.util.concurrent.Uninterruptibles;
+import org.apache.twill.common.Cancellable;
+import org.apache.twill.common.Threads;
+import org.apache.twill.zookeeper.NodeChildren;
+import org.apache.twill.zookeeper.NodeData;
+import org.apache.twill.zookeeper.OperationFuture;
+import org.apache.twill.zookeeper.ZKClient;
+import org.apache.zookeeper.CreateMode;
+import org.apache.zookeeper.KeeperException;
+import org.apache.zookeeper.WatchedEvent;
+import org.apache.zookeeper.Watcher;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.UUID;
+import java.util.concurrent.CancellationException;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+import javax.annotation.Nullable;
+
+/**
+ * A reentrant distributed lock implementation that uses ZooKeeper. It
uses the receipt described in
--- End diff --
fixed
> Added support for distributed lock
> ----------------------------------
>
> Key: TWILL-118
> URL: https://issues.apache.org/jira/browse/TWILL-118
> Project: Apache Twill
> Issue Type: Sub-task
> Components: api, core, zookeeper
> Reporter: Terence Yim
> Assignee: Terence Yim
> Fix For: 0.5.0-incubating
>
>
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