[CURATOR-485] GroupMember API does not expose PersistentEphemeralNode or callbacks

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 4.0.1
• Component/s: Recipes
• Environment: win7 64, curator 4.0.1, zk 3.5
• Assignee: Unassigned
• Reporter: Andrey Belom
• Created: 20/Nov/18 00:52
• Updated: 20/Nov/18 00:52

Description

I create an instance of GroupMember using GroupMember(CuratorFramework client, String membershipPath, String thisId) constructor, invoke GroupMember.start() method and GroupMember.setThisData() method

depending on timing of things I sometimes get

Exception in thread "main" java.lang.IllegalStateException: initial create has not been processed. Call waitForInitialCreate() to ensure.
 at org.apache.curator.shaded.com.google.common.base.Preconditions.checkState(Preconditions.java:444)
 at org.apache.curator.framework.recipes.nodes.PersistentNode.setData(PersistentNode.java:391)
 at org.apache.curator.framework.recipes.nodes.GroupMember.setThisData(GroupMember.java:95)

I am sorry if I am missing something, but what API allows me to invoke pen.waitForInitialCreate or get some sort of a callback letting me know that I am allowed to change data?

There is a way to override newPersistentEphemeralNode() method in order to save pen reference and invoke waitForInitialCreate after GroupMember.start() but that does not seem right.

I am really sorry if I am missing the point of this recipe.