retriving "Field List" in Node.Js Adaptor

[tugan]

I enabled log it looks like snapshot related do you have any advice

21-Oct-14 18:30:03,154|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 9 |Requested item names: [buddy_list]
21-Oct-14 18:30:03,154|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 9 |Requested field names: [command, key]
21-Oct-14 18:30:03,154|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 9 |Max allowed frequency for user null and item buddy_list = 0.0
21-Oct-14 18:30:03,155|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 9 |Setting min update distance for item buddy_list: requested = 0; allowed = 0; used = 0 ms
21-Oct-14 18:30:03,155|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 9 |Max allowed buffer size for user null and item buddy_list = 0
21-Oct-14 18:30:03,155|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 9 |Setting buffer size for item buddy_list: requested = 1; allowed = 0; used = 1
21-Oct-14 18:30:03,155|DEBUG|LightstreamerLogger.preprocesso r |SERVER POOLED THREAD 10 |Setting preprocessor of type COMMAND for item buddy_list
21-Oct-14 18:30:03,155|DEBUG|LightstreamerLogger.subscriptio ns|SERVER POOLED THREAD 10 |Subscribing to item buddy_list on PROXY_NODECHAT.INVSTR_SIMPLE_MESSENGER
21-Oct-14 18:30:03,236|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 8 |Requested item names: [im_Guest575]
21-Oct-14 18:30:03,236|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 8 |Requested field names: [fromNick, toNick, message]
21-Oct-14 18:30:03,236|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 8 |Max allowed frequency for user null and item im_Guest575 = 0.0
21-Oct-14 18:30:03,236|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 8 |Setting min update distance for item im_Guest575: requested = 0; allowed = 0; used = 0 ms
21-Oct-14 18:30:03,236|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 8 |Max allowed buffer size for user null and item im_Guest575 = 0
21-Oct-14 18:30:03,236|DEBUG|LightstreamerLogger.requests |SERVER POOLED THREAD 8 |Setting buffer size for item im_Guest575: requested = 0; allowed = 0; used = 0
21-Oct-14 18:30:03,237|DEBUG|LightstreamerLogger.preprocesso r |SERVER POOLED THREAD 8 |Setting preprocessor of type DISTINCT for item im_Guest575
21-Oct-14 18:30:03,257|DEBUG|LightstreamerLogger.preprocesso r |SERVER POOLED THREAD 8 |No frequency prefilter for item im_Guest575
21-Oct-14 18:30:03,257|DEBUG|LightstreamerLogger.preprocesso r |SERVER POOLED THREAD 8 |Snapshot buffer size for DISTINCT item im_Guest575 set to 30
21-Oct-14 18:30:03,257|DEBUG|LightstreamerLogger.subscriptio ns|SERVER POOLED THREAD 8 |Subscribing to item im_Guest575 on PROXY_NODECHAT.INVSTR_SIMPLE_MESSENGER
21-Oct-14 18:30:03,274|DEBUG|LightstreamerLogger.subscriptio ns|#2 Notify Receiver |INCOMING END OF SNAPSHOT NOTIFY for buddy_list
21-Oct-14 18:30:03,274|DEBUG|LightstreamerLogger.preprocesso r |#2 Notify Receiver |Dispatching COMMAND update for item buddy_list: Snapshot end signal for item buddy_list on PROXY_NODECHAT.INVSTR_SIMPLE_MESSENGER
21-Oct-14 18:30:03,348|DEBUG|LightstreamerLogger.subscriptio ns|#2 Notify Receiver |INCOMING END OF SNAPSHOT NOTIFY for im_Guest575
21-Oct-14 18:30:03,349|DEBUG|LightstreamerLogger.preprocesso r |#2 Notify Receiver |Dispatching DISTINCT update for item im_Guest575: Snapshot end signal for item im_Guest575 on PROXY_NODECHAT.INVSTR_SIMPLE_MESSENGER
21-Oct-14 18:30:03,434|DEBUG|LightstreamerLogger.subscriptio ns|#2 Notify Receiver |INCOMING SNAPSHOT for buddy_list --> {19=e, 17=", 18=k, 33=}, 15=", 16=,, 13=D, 14=D, 11=", 12=A, 21=", 20=y, 22=:, 23=", 24=G, 25=u, 26=e, 27=s, 28=t, 29=5, 3=o, 2=c, 10=:, 1=", 0={, 30=7, 7=n, 6=a, 32=", 5=m, 31=5, 4=m, 9=", 8=d}
21-Oct-14 18:30:03,434|WARN |LightstreamerLogger.preprocessor |#2 Notify Receiver |Unexpected snapshot event for COMMAND item buddy_list
21-Oct-14 18:30:03,435|ERROR|LightstreamerLogger.preprocesso r |#2 Notify Receiver |Missing mandatory parameter in command event for key null

regards
tugan

[giuseppe.corti]

Hi Tugan,

Please note that the "buddy_list" Item requested by the client is managed in command mode. This implies that the updates the Adapter send to the server must have some constraints; in particular must always contain fields "command" and "key".
So the third parameter of the update method should be a JavaScript object with a structure like this:
{command: "ADD", key: "Guest101"}

In your case the JSON.stringify of buddyList results in string an finally in something of incomprehensible for the Lightstreamer server:
{19=e, 17=", 18=k, 33=}, 15=", 16=,, 13=D, 14=D, 11=", 12=A, 21=", 20=y, 22=:, 23=", 24=G, 25=u, 26=e, 27=s, 28=t, 29=5, 3=o, 2=c, 10=:, 1=", 0={, 30=7, 7=n, 6=a, 32=", 5=m, 31=5, 4=m, 9=", 8=d}

You should simply use the object buddylist in the update method:
dataProvider.update(LIST, false, buddyList);

HTH,
Giuseppe