Polling DB Adapter is not working when "NumberOfThreads" value= 1

Question

Hi All,
I am facing an issue with DB adapter in OSB.
My requirement is, i have one table name as "Header Table",for every 1 sec around 5 messages are inserted into this table.By using that records i need to call API.
For this i created one DB adapter with polling option.It is poll the Header table for every 3 seconds and fetch the 5 records.Suppose in first iteration at 3 seconds it poll and get 5 records
One proxy service is created for that Adapter jca file.This proxy will get the records and call the API.
But here issue is the thread is poll the table after first iteration(first 5) records are processing only.After All 5 records are processed only the next polling happening.
That means every 3 sec polling is not happening.
For this i increased NumberOfThreads value =3 in Adapter jca file.Then polling is Not working,it is completely stopped not even 3 sec also?
I tried with both XA , NonXA adapters and Distributed polling option also.But it is not working.This is not working in Cluster environment and as well as my local system?
When i use NumberOfThreads=1 it is working,More than 1 it is not working
These properties i used for JCA file.
  <activation-spec className="oracle.tip.adapter.db.DBActivationSpec">
      <property name="DescriptorName" value="GOP_DB_FSL_HEADER_POLLING_APICALL.XxGilSvcOrderHeader"/>
      <property name="QueryName" value="GOP_DB_FSL_HEADER_POLLING_APICALLSelect"/>
      <property name="MappingsMetaDataURL" value="GOP_DB_FSL_HEADER_POLLING_APICALL-or-mappings.xml"/>
      <property name="PollingStrategy" value="LogicalDeletePollingStrategy"/>
      <property name="MarkReadColumn" value="SOA_POLL_STATUS"/>
      <property name="MarkReadValue" value="C"/>
      <property name="MarkUnreadValue" value="W"/>
      <property name="PollingInterval" value="3"/>
      <property name="MaxRaiseSize" value="1"/>
      <property name="MaxTransactionSize" value="5"/>
      <property name="NumberOfThreads" value="1"/>
      <property name="ReturnSingleResultSet" value="false"/>
      <property name="SequencingColumn" value="OFS_CREATEDDATE"/>
      <property name="MarkReservedValue" value="R${weblogic.Name-2}-${IP-2}"/>
    </activation-spec>
===========================================================
Professionals, Please Help me on the same
Thanks in Advance
AV

Answer 1

Hi All,
I am facing an issue with DB adapter in OSB.
My requirement is, i have one table name as "Header Table",for every 1 sec around 5 messages are inserted into this table.By using that records i need to call API.
For this i created one DB adapter with polling option.It is poll the Header table for every 3 seconds and fetch the 5 records.Suppose in first iteration at 3 seconds it poll and get 5 records
One proxy service is created for that Adapter jca file.This proxy will get the records and call the API.
But here issue is the thread is poll the table after first iteration(first 5) records are processing only.After All 5 records are processed only the next polling happening.
That means every 3 sec polling is not happening.
For this i increased NumberOfThreads value =3 in Adapter jca file.Then polling is Not working,it is completely stopped not even 3 sec also?
I tried with both XA , NonXA adapters and Distributed polling option also.But it is not working.This is not working in Cluster environment and as well as my local system?
When i use NumberOfThreads=1 it is working,More than 1 it is not working
These properties i used for JCA file.
  <activation-spec className="oracle.tip.adapter.db.DBActivationSpec">
      <property name="DescriptorName" value="GOP_DB_FSL_HEADER_POLLING_APICALL.XxGilSvcOrderHeader"/>
      <property name="QueryName" value="GOP_DB_FSL_HEADER_POLLING_APICALLSelect"/>
      <property name="MappingsMetaDataURL" value="GOP_DB_FSL_HEADER_POLLING_APICALL-or-mappings.xml"/>
      <property name="PollingStrategy" value="LogicalDeletePollingStrategy"/>
      <property name="MarkReadColumn" value="SOA_POLL_STATUS"/>
      <property name="MarkReadValue" value="C"/>
      <property name="MarkUnreadValue" value="W"/>
      <property name="PollingInterval" value="3"/>
      <property name="MaxRaiseSize" value="1"/>
      <property name="MaxTransactionSize" value="5"/>
      <property name="NumberOfThreads" value="1"/>
      <property name="ReturnSingleResultSet" value="false"/>
      <property name="SequencingColumn" value="OFS_CREATEDDATE"/>
      <property name="MarkReservedValue" value="R${weblogic.Name-2}-${IP-2}"/>
    </activation-spec>
===========================================================
Professionals, Please Help me on the same
Thanks in Advance
AV