Github user anmolnar commented on a diff in the pull request:
https://github.com/apache/zookeeper/pull/377#discussion_r172509908
--- Diff: src/java/main/org/apache/zookeeper/server/OldEphemeralType.java
---
@@ -0,0 +1,74 @@
+/**
+ * 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
+ * <p/>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p/>
+ * 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.zookeeper.server;
+
+/**
+ * See https://issues.apache.org/jira/browse/ZOOKEEPER-2901
+ *
+ * version 3.5.3 introduced bugs associated with how TTL nodes were
implemented. version 3.5.4
+ * fixes the problems but makes TTL nodes created in 3.5.3 invalid.
OldEphemeralType is a copy
+ * of the old - bad - implementation that is provided as a workaround.
{@link EphemeralType#TTL_3_5_3_EMULATION_PROPERTY}
+ * can be used to emulate support of the badly specified TTL nodes.
+ */
+public enum OldEphemeralType {
+ /**
+ * Not ephemeral
+ */
+ VOID,
+ /**
+ * Standard, pre-3.5.x EPHEMERAL
+ */
+ NORMAL,
+ /**
+ * Container node
+ */
+ CONTAINER,
+ /**
+ * TTL node
+ */
+ TTL;
+
+ public static final long CONTAINER_EPHEMERAL_OWNER = Long.MIN_VALUE;
+ public static final long MAX_TTL = 0x0fffffffffffffffL;
+ public static final long TTL_MASK = 0x8000000000000000L;
+
+ public static OldEphemeralType get(long ephemeralOwner) {
--- End diff --
Makes sense.
I think it would be slightly more accurate to name the old enum to
`EphemeralTypeEmu353`.
What do you think?
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