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xmlBlaster 2.1.0 API | |||||||||
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public interface I_LoadBalancer
Interface to the load balancing implementation.
See http://www.ddj.com/documents/s=921/ddj9804i/9804i.htm
Method Summary | |
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NodeMasterInfo |
getClusterNode(java.util.Set nodeMasterInfoSet)
Your plugin should determine which xmlBlaster node to choose. |
void |
initialize(ServerScope glob,
ClusterManager clusterManager)
This is called after instantiation of the plugin |
Method Detail |
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void initialize(ServerScope glob, ClusterManager clusterManager)
glob
- The Global handle of this xmlBlaster server instance.clusterManager
- My managerNodeMasterInfo getClusterNode(java.util.Set nodeMasterInfoSet) throws XmlBlasterException
Iterator it = clusterNodeSet.iterator(); while (it.hasNext()) { NodeMasterInfo nodeMasterInfo = (NodeMasterInfo)it.Next(); ... // Your load balancing code // Return the clusterNode if nodeMasterInfo is OK to handle the message: ClusterNode clusterNode = nodeMasterInfo.getClusterNode(); return clusterNode; }This corresponds to the following XML configuration:
<!-- NodeMasterInfo.java contains the parsed: --> <master type='DomainToMaster' stratum='0'> <key domain='RUGBY'/> <key type='XPATH'>//STOCK</key> </master>
nodeMasterInfoSet
- A set containing NodeMasterInfo objects, the possible xmlBlaster nodes.
Is never null, but may have a size of 0.
The set i guaranteed to be sorted after"available:stratum:nodeId" available := The connection state is: 0 connected, 1 polling stratum := 0 master, 1 slave, 2 slaveOfSlave ... nodeId := a unique counter (nodeMasterInfo.getCount())The set contains only nodes marked as allowed (these are nodes we are connected to or polling for), not available nodes are filtered away already.
nodeMasterInfo.getClusterNode()
and the xmlBlasterConnection
to the master node with nodeMasterInfo.getClusterNode().getXmlBlasterAccess()
XmlBlasterException
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