Hi Jesse,
The behavior you observed is required by the AgentX protocol.
See RFC 2741 section 7.1.4.2.2 for details.
If you have such an index structure, where you share the
index of the master table, then you should not use any
index allocation for the child table.
Thus, you should overwrite the methods allocateIndex(..)
and deallocateIndex(..) in AgentXSharedMOTableSupport
in your own sub-class. Then use that sub-class in your
child DefaultAgentXSharedMOTable.
Hope that helps.
Best regards,
Frank
Am 20.02.2012 14:10, schrieb Jesse Woo:
> I have a MIB contains two tables, main table peerTable and its child table
> statTable.
>
> Each row in peerTable represents one session, and each row of statTable is
> one statistic of a session. Hence the relationship of peerTable and statTable
> is one-to-many.
>
> I have many sessions and want the two tables shared across sessions, and I
> want the tree is built like this,
>
> Say session 10 has 3 statistics
>
> peerIndex.10 = 10 # represents session 10
>
> statIndex.10.1 = 1 # represents 1st stat of session 10
> statIndex.10.2 = 2 # represents 1st stat of session 10
> statIndex.10.3 = 3 # represents 1st stat of session 10
>
>
> I have followed sample AgentppTestMib.java and created the two tables as
> DefaultAgentXSharedMOTable.
>
> The peerTable works ok but I can't add any rows to statTable because master
> agent returned error code 259 (AGENTX_INDEX_ALREADY_ALLOCATED) when
> allocating index for statTable.
>
> Seems master can't allocate combined index if one of them is already
> allocated. For example, peerIndex 10 is created for peerTable, and I want to
> allocate index (peerIndx, statIndex) (10,1) for statTable and master rejects
> it as the 10 is already allocated.
>
> My question is:
>
> Is it AgentX API bug? If not, is it my MIB not compatible with AgentX? If so,
> how to implement shared table& child tables?
>
>
> Below are my codes and MIB:
>
> private MOTable<StatEntryRow,
> MOColumn,
> MOTableModel<StatEntryRow>> statEntry;
> private MOTableModel<StatEntryRow> statEntryModel;
>
> ...
>
> @SuppressWarnings(value={"unchecked"})
> private void createStatEntry(MOFactory moFactory) {
> // Index definition
> statEntryIndexes =
> new MOTableSubIndex[] {
> moFactory.createSubIndex(oidPeerIndex,
> SMIConstants.SYNTAX_INTEGER, 1, 1),
> moFactory.createSubIndex(oidStatIndex,
> SMIConstants.SYNTAX_INTEGER, 1, 1) };
> ...
>
> // Table model
> statEntryModel =
> moFactory.createTableModel(oidStatEntry,
> statEntryIndex,
> statEntryColumns);
> ((MOMutableTableModel<StatEntryRow>)statEntryModel).setRowFactory(
> new StatEntryRowFactory());
> statEntry =
> moFactory.createTable(oidStatEntry,
> statEntryIndex,
> statEntryColumns,
> statEntryModel);
> }
>
>
> @SuppressWarnings("unchecked")
> static class CerillionCcs2MOFactory extends DefaultMOFactory {
>
> public MOTable createTable(OID oid, MOTableIndex indexDef,
> MOColumn[] columns) {
> if (oidPeerEntry.equals(oid)) {
> return new DefaultAgentXSharedMOTable(oid, indexDef, columns) {
> public void setAgentXSharedMOTableSupport(AgentXSharedMOTableSupport
> sharedTableSupport) {
> super.setAgentXSharedMOTableSupport(sharedTableSupport);
> ((MOMutableTableModel)model).clear();
>
> OID index =
> new OID(new int[] {
> sharedTableSupport.getSession().getSessionID() });
>
> // register current session on shared table PeerEntry
> Variable[] vbs = getDefaultValues();
> vbs[idxPeerIndex] = new
> Integer32(sharedTableSupport.getSession().getSessionID());
> vbs[idxPeerName] = new OctetString("Session - " +
> sharedTableSupport.getSession().getSessionID());
> vbs[idxCurrentState] = new
> OctetString(function.getState().toString());
>
> MOTableRow row = createRow(index, vbs);
> if (row != null) {
> addRow(row);
> }
> }
> };
> }
>
> if (oidStatEntry.equals(oid)) {
> return new DefaultAgentXSharedMOTable(oid, indexDef, columns) {
> public void setAgentXSharedMOTableSupport(AgentXSharedMOTableSupport
> sharedTableSupport) {
> super.setAgentXSharedMOTableSupport(sharedTableSupport);
> ((MOMutableTableModel)model).clear();
>
> int sessionId = sharedTableSupport.getSession().getSessionID();
>
> // add initial stats
> psList = function.getPeerStatistics();
> for (int i=0; psList!=null&& i<psList.size(); i++) {
> OID index =
> new OID(new int[] { sessionId, i+1});
>
> PeerStatistics ps = psList.get(i);
>
> Variable[] vbs = getDefaultValues();
> vbs[idxStatIndex] = new Integer32(i+1);
> vbs[idxStatname] = new OctetString(ps.getPeerName() + " of
> session - " + sessionId);
> vbs[idxRecvCount] = new Counter32((int)ps.getReceivedCount());
> vbs[idxSentCount] = new Counter32((int)ps.getSentCount());
>
> MOTableRow row = createRow(index, vbs);
> if (row != null) {
> addRow(row);
> }
> }
> }
> };
> }
> return new DefaultAgentXSharedMOTable(oid, indexDef, columns);
> }
>
> public MOTable createTable(OID oid, MOTableIndex indexDef, MOColumn[]
> columns,
> MOTableModel model) {
> DefaultAgentXSharedMOTable table =
> (DefaultAgentXSharedMOTable) createTable(oid, indexDef, columns);
> table.setModel(model);
> return table;
> }
>
> }
>
>
> Here is the MIB:
>
> peerEntry OBJECT-TYPE
> SYNTAX PeerEntry
> ACCESS not-accessible
> STATUS mandatory
> DESCRIPTION "Each entry presents a peer."
> INDEX { peerIndex }
> ::= { peerTable 1 }
>
> PeerEntry ::= SEQUENCE {
> peerIndex INTEGER,
> ...
> }
>
> peerIndex OBJECT-TYPE
> SYNTAX INTEGER (1..2147483647)
> ACCESS read-only
> STATUS mandatory
> DESCRIPTION "Unique index on peer table."
> ::= { peerEntry 1 }
>
>
> statEntry OBJECT-TYPE
> SYNTAX StatEntry
> ACCESS not-accessible
> STATUS mandatory
> DESCRIPTION "Each entry represents a statistic of a peer.
> The peerIndex in the index represents the entry in
> the peerTable that corresponds to the statEntry.
> INDEX { peerIndex, statIndex }
> ::= { statTable 1 }
>
>
> StatEntry ::= SEQUENCE {
> statIndex INTEGER,
> ...
> }
>
> statIndex OBJECT-TYPE
> SYNTAX INTEGER (1..2147483647)
> ACCESS read-only
> STATUS mandatory
> DESCRIPTION "A unique value for each statistic of the peer."
> ::= { statEntry 1 }
>
>
> Regards,
> Jesse
> Cerillion Technologies Limited
> Office. +44 20 7927 6197
> Web. www.cerillion.com
> Addr. 125 Shaftsbury Avenue, London, WC2H 8AD, UK
> _______________________________________________
> SNMP4J mailing list
> SNMP4J@agentpp.org
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