Hazelcast Map Expire Listener on key, race condition
I have IMap<Long, SomeObject> on hazelcast member,
where some part of Long keys have expiration time (TTL).
For this purpose I am registering EntryExpiredListener on key using addEntryListener(MapListener, K, boolean).
Everything works fine, but I have doubts.
As documentation states:
With the above approach, there is the possibility of missing events between the creation of the instance and registering the listener. To overcome this race condition, Hazelcast allows you to register listeners in configuration.
Will I encounter 'missing events' described above, if I register EntryExpiredListener on key?
hazelcast hazelcast-imap
asked Nov 24 '18 at 8:25
JavaMachineJavaMachine
3651220
add a comment |
I have IMap<Long, SomeObject> on hazelcast member,
where some part of Long keys have expiration time (TTL).
For this purpose I am registering EntryExpiredListener on key using addEntryListener(MapListener, K, boolean).
Everything works fine, but I have doubts.
As documentation states:
With the above approach, there is the possibility of missing events between the creation of the instance and registering the listener. To overcome this race condition, Hazelcast allows you to register listeners in configuration.
Will I encounter 'missing events' described above, if I register EntryExpiredListener on key?
hazelcast hazelcast-imap
asked Nov 24 '18 at 8:25
JavaMachineJavaMachine
3651220
add a comment |
I have IMap<Long, SomeObject> on hazelcast member,
where some part of Long keys have expiration time (TTL).
For this purpose I am registering EntryExpiredListener on key using addEntryListener(MapListener, K, boolean).
Everything works fine, but I have doubts.
As documentation states:
With the above approach, there is the possibility of missing events between the creation of the instance and registering the listener. To overcome this race condition, Hazelcast allows you to register listeners in configuration.
Will I encounter 'missing events' described above, if I register EntryExpiredListener on key?
hazelcast hazelcast-imap
asked Nov 24 '18 at 8:25
JavaMachineJavaMachine
3651220
I have IMap<Long, SomeObject> on hazelcast member,
where some part of Long keys have expiration time (TTL).
For this purpose I am registering EntryExpiredListener on key using addEntryListener(MapListener, K, boolean).
Everything works fine, but I have doubts.
As documentation states:
With the above approach, there is the possibility of missing events between the creation of the instance and registering the listener. To overcome this race condition, Hazelcast allows you to register listeners in configuration.
Will I encounter 'missing events' described above, if I register EntryExpiredListener on key?
hazelcast hazelcast-imap
hazelcast hazelcast-imap
asked Nov 24 '18 at 8:25
JavaMachineJavaMachine
3651220
asked Nov 24 '18 at 8:25
JavaMachineJavaMachine
3651220
edited Nov 24 '18 at 9:03
JavaMachine
asked Nov 24 '18 at 8:25
JavaMachineJavaMachine
3651220
asked Nov 24 '18 at 8:25
JavaMachineJavaMachine
3651220
asked Nov 24 '18 at 8:25
JavaMachineJavaMachine
3651220
3651220
add a comment |
add a comment |
1 Answer
1
active
oldest
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If it’s on the member & you mark the listener as local ( so each member receive only local expration events) and define in the config, you wont since events will be local to each member.
If you register the listener after you create the instance, after partitions distributed & before you register the listener, its possible that some data could expire. This is why above statements says you need to define listener in the config to prevent this.
answered Nov 25 '18 at 0:26
Gokhan OnerGokhan Oner
2,3961121
But what about registering listener on key? I guess you cannot register on key listeners beforehand (in config). This means I still might miss events?
– JavaMachine
Nov 26 '18 at 12:17
What do you mean by registering listeners on key? Can you give an example?
– Gokhan Oner
Nov 27 '18 at 8:25
In my question above I included link: docs.hazelcast.org/docs/3.11/javadoc/com/hazelcast/core/…
– JavaMachine
Nov 27 '18 at 8:30
In this case,, yes, since you can only register the listener this way through IMap.
– Gokhan Oner
Nov 27 '18 at 14:13
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If it’s on the member & you mark the listener as local ( so each member receive only local expration events) and define in the config, you wont since events will be local to each member.
If you register the listener after you create the instance, after partitions distributed & before you register the listener, its possible that some data could expire. This is why above statements says you need to define listener in the config to prevent this.
answered Nov 25 '18 at 0:26
Gokhan OnerGokhan Oner
2,3961121
But what about registering listener on key? I guess you cannot register on key listeners beforehand (in config). This means I still might miss events?
– JavaMachine
Nov 26 '18 at 12:17
What do you mean by registering listeners on key? Can you give an example?
– Gokhan Oner
Nov 27 '18 at 8:25
In my question above I included link: docs.hazelcast.org/docs/3.11/javadoc/com/hazelcast/core/…
– JavaMachine
Nov 27 '18 at 8:30
In this case,, yes, since you can only register the listener this way through IMap.
– Gokhan Oner
Nov 27 '18 at 14:13
add a comment |
If it’s on the member & you mark the listener as local ( so each member receive only local expration events) and define in the config, you wont since events will be local to each member.
If you register the listener after you create the instance, after partitions distributed & before you register the listener, its possible that some data could expire. This is why above statements says you need to define listener in the config to prevent this.
answered Nov 25 '18 at 0:26
Gokhan OnerGokhan Oner
2,3961121
But what about registering listener on key? I guess you cannot register on key listeners beforehand (in config). This means I still might miss events?
– JavaMachine
Nov 26 '18 at 12:17
What do you mean by registering listeners on key? Can you give an example?
– Gokhan Oner
Nov 27 '18 at 8:25
In my question above I included link: docs.hazelcast.org/docs/3.11/javadoc/com/hazelcast/core/…
– JavaMachine
Nov 27 '18 at 8:30
In this case,, yes, since you can only register the listener this way through IMap.
– Gokhan Oner
Nov 27 '18 at 14:13
add a comment |
If it’s on the member & you mark the listener as local ( so each member receive only local expration events) and define in the config, you wont since events will be local to each member.
If you register the listener after you create the instance, after partitions distributed & before you register the listener, its possible that some data could expire. This is why above statements says you need to define listener in the config to prevent this.
answered Nov 25 '18 at 0:26
Gokhan OnerGokhan Oner
2,3961121
If it’s on the member & you mark the listener as local ( so each member receive only local expration events) and define in the config, you wont since events will be local to each member.
If you register the listener after you create the instance, after partitions distributed & before you register the listener, its possible that some data could expire. This is why above statements says you need to define listener in the config to prevent this.
answered Nov 25 '18 at 0:26
Gokhan OnerGokhan Oner
2,3961121
answered Nov 25 '18 at 0:26
Gokhan OnerGokhan Oner
2,3961121
answered Nov 25 '18 at 0:26
Gokhan OnerGokhan Oner
2,3961121
answered Nov 25 '18 at 0:26
Gokhan OnerGokhan Oner
2,3961121
2,3961121
But what about registering listener on key? I guess you cannot register on key listeners beforehand (in config). This means I still might miss events?
– JavaMachine
Nov 26 '18 at 12:17
What do you mean by registering listeners on key? Can you give an example?
– Gokhan Oner
Nov 27 '18 at 8:25
In my question above I included link: docs.hazelcast.org/docs/3.11/javadoc/com/hazelcast/core/…
– JavaMachine
Nov 27 '18 at 8:30
In this case,, yes, since you can only register the listener this way through IMap.
– Gokhan Oner
Nov 27 '18 at 14:13
add a comment |
But what about registering listener on key? I guess you cannot register on key listeners beforehand (in config). This means I still might miss events?
– JavaMachine
Nov 26 '18 at 12:17
What do you mean by registering listeners on key? Can you give an example?
– Gokhan Oner
Nov 27 '18 at 8:25
In my question above I included link: docs.hazelcast.org/docs/3.11/javadoc/com/hazelcast/core/…
– JavaMachine
Nov 27 '18 at 8:30
In this case,, yes, since you can only register the listener this way through IMap.
– Gokhan Oner
Nov 27 '18 at 14:13
But what about registering listener on key? I guess you cannot register on key listeners beforehand (in config). This means I still might miss events?
– JavaMachine
Nov 26 '18 at 12:17
But what about registering listener on key? I guess you cannot register on key listeners beforehand (in config). This means I still might miss events?
– JavaMachine
Nov 26 '18 at 12:17
What do you mean by registering listeners on key? Can you give an example?
– Gokhan Oner
Nov 27 '18 at 8:25
What do you mean by registering listeners on key? Can you give an example?
– Gokhan Oner
Nov 27 '18 at 8:25
In my question above I included link: docs.hazelcast.org/docs/3.11/javadoc/com/hazelcast/core/…
– JavaMachine
Nov 27 '18 at 8:30
In my question above I included link: docs.hazelcast.org/docs/3.11/javadoc/com/hazelcast/core/…
– JavaMachine
Nov 27 '18 at 8:30
In this case,, yes, since you can only register the listener this way through IMap.
– Gokhan Oner
Nov 27 '18 at 14:13
In this case,, yes, since you can only register the listener this way through IMap.
– Gokhan Oner
Nov 27 '18 at 14:13
add a comment |
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